diff --git a/.gitignore b/.gitignore
index f308b34a..6ca9e19f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 /objs/
 /nextpnr-generic*
 /nextpnr-ice40*
+/nextpnr-ecp5*
 cmake-build-*/
 Makefile
 cmake_install.cmake
diff --git a/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.cpp b/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.cpp
index a92ab537..673252d2 100644
--- a/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.cpp
+++ b/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.cpp
@@ -74,6 +74,7 @@ public:
     QtProperty *indexToProperty(const QModelIndex &index) const;
     QTreeWidgetItem *indexToItem(const QModelIndex &index) const;
     QtBrowserItem *indexToBrowserItem(const QModelIndex &index) const;
+    QtBrowserItem *itemToBrowserItem(QTreeWidgetItem *item) const { return m_itemToIndex.value(item); };
     bool lastColumn(int column) const;
     void disableItem(QTreeWidgetItem *item) const;
     void enableItem(QTreeWidgetItem *item) const;
@@ -1068,6 +1069,16 @@ void QtTreePropertyBrowser::editItem(QtBrowserItem *item)
     d_ptr->editItem(item);
 }
 
+QTreeWidget *QtTreePropertyBrowser::treeWidget() const
+{
+    return d_ptr->treeWidget();
+}
+
+QtBrowserItem *QtTreePropertyBrowser::itemToBrowserItem(QTreeWidgetItem *item)
+{
+    return d_ptr->itemToBrowserItem(item);
+}
+
 #if QT_VERSION >= 0x040400
 QT_END_NAMESPACE
 #endif
diff --git a/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.h b/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.h
index c5f7fa88..7bc96b69 100644
--- a/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.h
+++ b/3rdparty/QtPropertyBrowser/src/qttreepropertybrowser.h
@@ -47,6 +47,7 @@
 QT_BEGIN_NAMESPACE
 #endif
 
+class QTreeWidget;
 class QTreeWidgetItem;
 class QtTreePropertyBrowserPrivate;
 
@@ -107,6 +108,9 @@ public:
 
     void editItem(QtBrowserItem *item);
 
+    //ADDED:miodrag
+    QTreeWidget *treeWidget() const;
+    QtBrowserItem *itemToBrowserItem(QTreeWidgetItem *item);
 Q_SIGNALS:
 
     void collapsed(QtBrowserItem *item);
diff --git a/3rdparty/python-console/modified/pyconsole.cc b/3rdparty/python-console/modified/pyconsole.cc
deleted file mode 100644
index d724553b..00000000
--- a/3rdparty/python-console/modified/pyconsole.cc
+++ /dev/null
@@ -1,322 +0,0 @@
-#include "pyconsole.h"
-#include "pyinterpreter.h"
-#include "ColumnFormatter.h"
-
-#include <iostream>
-#include <QKeyEvent>
-#include <QFont>
-
-#include "Utils.h"
-
-const QString PythonConsole::PROMPT = ">>> ";
-const QString PythonConsole::MULTILINE_PROMPT = "... ";
-const QColor PythonConsole::NORMAL_COLOR = QColor::fromRgbF( 0, 0, 0 );
-const QColor PythonConsole::ERROR_COLOR = QColor::fromRgbF( 1.0, 0, 0 );
-const QColor PythonConsole::OUTPUT_COLOR = QColor::fromRgbF( 0, 0, 1.0 );
-
-PythonConsole::PythonConsole( QWidget* parent ):
-    QTextEdit( parent )
-{
-    QFont font("unexistent");
-    font.setStyleHint(QFont::Monospace);
-    setFont(font);
-    m_parseHelper.subscribe( this );    
-}
-
-void PythonConsole::keyPressEvent( QKeyEvent* e )
-{
-    switch ( e->key() )
-    {
-        case Qt::Key_Return:
-            handleReturnKeyPress( );
-            return;
-
-        case Qt::Key_Tab:
-            autocomplete( );
-            return;
-
-        case Qt::Key_Backspace:
-            if ( ! canBackspace( ) )
-                return;
-            break;
-
-        case Qt::Key_Up:
-            previousHistory( );
-            return;
-
-        case Qt::Key_Down:
-            nextHistory( );
-            return;
-
-        case Qt::Key_Left:
-            if ( ! canGoLeft( ) )
-                return;
-    }
-    if (!cursorIsOnInputLine()) return;
-    if (textCursor().columnNumber() < PythonConsole::PROMPT.size()) return;
-    QTextEdit::keyPressEvent( e );
-}
-
-void PythonConsole::handleReturnKeyPress( )
-{
-    if ( ! cursorIsOnInputLine( ) )
-    {
-        return;
-    }
-
-    QString line = getLine( );
-
-    m_parseHelper.process( line.toStdString( ) );
-    if ( m_parseHelper.buffered( ) )
-    {
-        append("");
-        displayPrompt( );
-    }
-    if ( line.size( ) )
-    {
-        m_historyBuffer.push_back( line.toStdString( ) );
-        m_historyIt = m_historyBuffer.end();
-    }
-    moveCursorToEnd( );
-}
-
-void PythonConsole::parseEvent( const ParseMessage& message )
-{
-    // handle invalid user input
-    if ( message.errorCode )
-    {
-        setTextColor( ERROR_COLOR );
-        append(message.message.c_str());
-
-        setTextColor( NORMAL_COLOR );
-        append("");
-        displayPrompt( );
-        return;
-    }
-
-    // interpret valid user input
-    int errorCode = 0;
-    std::string res;
-    if ( message.message.size() )
-        res = pyinterpreter_execute( message.message, &errorCode );
-    if ( errorCode )
-    {
-        setTextColor( ERROR_COLOR );
-    }
-    else
-    {
-        setTextColor( OUTPUT_COLOR );
-    }
-
-    if ( res.size( ) )
-    {
-        append(res.c_str());
-    }
-
-    setTextColor( NORMAL_COLOR );
-
-    // set up the next line on the console
-    append("");
-    displayPrompt( );
-}
-
-QString PythonConsole::getLine( )
-{
-    QTextCursor cursor = textCursor();
-    cursor.movePosition( QTextCursor::StartOfLine );
-    cursor.movePosition( QTextCursor::Right, QTextCursor::MoveAnchor, PythonConsole::PROMPT.size( ) );
-    cursor.movePosition( QTextCursor::EndOfLine, QTextCursor::KeepAnchor );
-    QString line = cursor.selectedText( );
-    cursor.clearSelection( );
-    return line;
-}
-
-bool PythonConsole::cursorIsOnInputLine( )
-{
-    int cursorBlock = textCursor( ).blockNumber( );
-    QTextCursor bottomCursor = textCursor( );
-    bottomCursor.movePosition( QTextCursor::End );
-    int bottomBlock = bottomCursor.blockNumber( );
-    return ( cursorBlock == bottomBlock );
-}
-
-bool PythonConsole::inputLineIsEmpty( )
-{
-    QTextCursor bottomCursor = textCursor( );
-    bottomCursor.movePosition( QTextCursor::End );
-    int col = bottomCursor.columnNumber( );
-    return ( col == PythonConsole::PROMPT.size( ) );
-}
-
-bool PythonConsole::canBackspace( )
-{
-    if ( ! cursorIsOnInputLine( ) )
-    {
-        return false;
-    }
-
-    if ( inputLineIsEmpty( ) )
-    {
-        return false;
-    }
-
-    return true;
-}
-
-bool PythonConsole::canGoLeft( )
-{
-    if ( cursorIsOnInputLine( ) )
-    {
-        QTextCursor bottomCursor = textCursor( );
-        int col = bottomCursor.columnNumber( );
-        return (col > PythonConsole::PROMPT.size( ));
-    }
-    return true;
-}
-
-void PythonConsole::displayPrompt( )
-{
-    QTextCursor cursor = textCursor();
-    cursor.movePosition( QTextCursor::End );
-    if ( m_parseHelper.buffered( ) )
-    {
-        cursor.insertText( PythonConsole::MULTILINE_PROMPT );
-    }
-    else
-    {
-        cursor.insertText( PythonConsole::PROMPT );
-    }
-    cursor.movePosition( QTextCursor::EndOfLine );
-}
-
-void PythonConsole::displayString(QString text)
-{
-    QTextCursor cursor = textCursor();
-    cursor.movePosition( QTextCursor::End );
-    cursor.insertText( text );
-    cursor.movePosition( QTextCursor::EndOfLine );
-}
-
-void PythonConsole::autocomplete( )
-{
-    if ( ! cursorIsOnInputLine( ) )
-        return;
-
-    QString line = getLine( );
-    const std::list<std::string>& suggestions =
-        pyinterpreter_suggest( line.toStdString( ) );
-    if (suggestions.size() == 1)
-    {
-        line = suggestions.back().c_str();
-    }
-    else
-    {
-        // try to complete to longest common prefix
-        std::string prefix =
-            LongestCommonPrefix(suggestions.begin(), suggestions.end());
-        if (prefix.size() > (size_t)line.size())
-        {
-            line = prefix.c_str();
-        }
-        else
-        {
-            ColumnFormatter fmt;
-            fmt.setItems(suggestions.begin(), suggestions.end());
-            fmt.format(width() / 10);
-            setTextColor( OUTPUT_COLOR );
-            const std::list<std::string>& formatted = fmt.formattedOutput();
-            for (std::list<std::string>::const_iterator it = formatted.begin();
-                it != formatted.end(); ++it)
-            {
-                append(it->c_str());
-            }
-            setTextColor( NORMAL_COLOR );
-        }
-    }
-
-    // set up the next line on the console
-    append("");
-    displayPrompt( );
-    moveCursorToEnd( );
-    QTextCursor cursor = textCursor();
-    cursor.insertText( line );
-    moveCursorToEnd( );
-}
-
-void PythonConsole::previousHistory( )
-{
-    if ( ! cursorIsOnInputLine( ) )
-        return;
-
-    if ( ! m_historyBuffer.size( ) )
-        return;
-
-    QTextCursor cursor = textCursor();
-    cursor.movePosition( QTextCursor::StartOfLine );
-    cursor.movePosition( QTextCursor::Right, QTextCursor::MoveAnchor, PythonConsole::PROMPT.size( ) );
-    cursor.movePosition( QTextCursor::EndOfLine, QTextCursor::KeepAnchor );
-    cursor.removeSelectedText( );
-    if ( m_historyIt != m_historyBuffer.begin( ) )
-    {
-        --m_historyIt;
-    }
-    cursor.insertText( m_historyIt->c_str() );
-}
-
-void PythonConsole::nextHistory( )
-{
-    if ( ! cursorIsOnInputLine( ) )
-        return;
-
-    if ( ! m_historyBuffer.size( ) )
-        return;
-    if ( m_historyIt == m_historyBuffer.end( ) )
-    {
-        return;
-    }
-    QTextCursor cursor = textCursor();
-    cursor.movePosition( QTextCursor::StartOfLine );
-    cursor.movePosition( QTextCursor::Right, QTextCursor::MoveAnchor, PythonConsole::PROMPT.size( ) );
-    cursor.movePosition( QTextCursor::EndOfLine, QTextCursor::KeepAnchor );
-    cursor.removeSelectedText( );
-    ++m_historyIt;
-    if ( m_historyIt == m_historyBuffer.end( ) )
-    {
-        return;
-    }
-    cursor.insertText( m_historyIt->c_str() );
-}
-
-void PythonConsole::moveCursorToEnd( )
-{
-    QTextCursor cursor = textCursor();
-    cursor.movePosition( QTextCursor::End );
-    setTextCursor( cursor );
-}
-
-void PythonConsole::insertFromMimeData(const QMimeData *src)
-{
-    if (src->hasText()) {
-        QStringList list = src->text().split("\n",QString::KeepEmptyParts);
-        bool lastends = src->text().endsWith("\n");
-        for (int i=0;i<list.size();i++)
-        {
-            QString line = list.at(i);            
-            displayString(line);
-            if (!lastends && (i==list.size()-1)) break;
-
-            m_parseHelper.process( line.toStdString( ) );
-            if ( m_parseHelper.buffered( ) )
-            {
-                append("");
-                displayPrompt( );
-            }
-            if ( line.size( ) )
-            {
-                m_historyBuffer.push_back( line.toStdString( ) );
-                m_historyIt = m_historyBuffer.end();
-            }
-            moveCursorToEnd( );
-        }
-    }
-}
\ No newline at end of file
diff --git a/3rdparty/python-console/modified/pyconsole.h b/3rdparty/python-console/modified/pyconsole.h
deleted file mode 100644
index adf4ce20..00000000
--- a/3rdparty/python-console/modified/pyconsole.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/**
-python-console
-Copyright (C) 2018  Alex Tsui
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-*/
-
-#ifndef PYCONSOLE_H
-#define PYCONSOLE_H
-#include <QColor>
-#include <QTextEdit>
-#include <QMimeData>
-#include "ParseHelper.h"
-#include "ParseListener.h"
-
-class QWidget;
-class QKeyEvent;
-
-class PythonConsole : public QTextEdit, ParseListener
-{
-    Q_OBJECT
-
-  public:
-    PythonConsole(QWidget *parent = 0);
-
-    void displayPrompt();
-    void displayString(QString text);
-
-  protected:
-    // override QTextEdit
-    virtual void keyPressEvent(QKeyEvent *e);
-
-    virtual void handleReturnKeyPress();
-
-    virtual void insertFromMimeData(const QMimeData *src);
-
-    /**
-    Handle a compilable chunk of Python user input.
-    */
-    virtual void parseEvent(const ParseMessage &message);
-
-    QString getLine();
-    bool cursorIsOnInputLine();
-    bool inputLineIsEmpty();
-    bool canBackspace();
-    bool canGoLeft();
-    void autocomplete();
-    void previousHistory();
-    void nextHistory();
-    void moveCursorToEnd();
-
-    static const QString PROMPT;
-    static const QString MULTILINE_PROMPT;
-
-    static const QColor NORMAL_COLOR;
-    static const QColor ERROR_COLOR;
-    static const QColor OUTPUT_COLOR;
-
-    ParseHelper m_parseHelper;
-    std::list<std::string> m_historyBuffer;
-    std::list<std::string>::const_iterator m_historyIt;
-};
-
-#endif // PYCONSOLE_H
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b4493486..3ca7935e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,31 @@ option(BUILD_PYTHON "Build Python Integration" ON)
 option(BUILD_TESTS "Build GUI" OFF)
 
 # List of families to build
-set(FAMILIES generic ice40)
+set(FAMILIES generic ice40 ecp5)
+
+set(ARCH "" CACHE STRING "Architecture family for nextpnr build")
+set_property(CACHE ARCH PROPERTY STRINGS ${FAMILIES})
+
+if (NOT ARCH)
+    message(STATUS "Architecture needs to be set, set desired one with -DARCH=xxx")
+    message(STATUS "Supported architectures are :")
+    message(STATUS "  all")
+    foreach(item ${FAMILIES})
+        message(STATUS "  ${item}")
+    endforeach()
+    message(FATAL_ERROR "Architecture setting is mandatory")
+endif ()
+
+if (ARCH STREQUAL "all")
+    SET(ARCH ${FAMILIES})
+endif()
+
+foreach(item ${ARCH})
+    if (NOT item IN_LIST FAMILIES)
+        message(FATAL_ERROR "Architecture '${item}' not in list of supported architectures")
+    endif()
+endforeach()
+
 set(CMAKE_CXX_STANDARD 11)
 if (MSVC)
 set(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "" FORCE)
@@ -30,6 +54,10 @@ find_package(Sanitizers)
 # List of Boost libraries to include
 set(boost_libs filesystem thread program_options)
 
+if (BUILD_GUI AND NOT BUILD_PYTHON)
+    message(FATAL_ERROR "GUI requires Python to build")
+endif()
+
 if (BUILD_PYTHON)
     # TODO: sensible minimum Python version
     find_package(PythonInterp 3.5 REQUIRED)
@@ -62,7 +90,7 @@ if (BUILD_TESTS)
 endif()
 
 if (BUILD_GUI)
-    add_subdirectory(3rdparty/QtPropertyBrowser ${CMAKE_CURRENT_BINARY_DIR}/generated/3rdparty/QtPropertyBrowser)
+    add_subdirectory(3rdparty/QtPropertyBrowser ${CMAKE_CURRENT_BINARY_DIR}/generated/3rdparty/QtPropertyBrowser EXCLUDE_FROM_ALL)
 endif()
 
 add_definitions("-DGIT_COMMIT_HASH=${GIT_COMMIT_HASH}")
@@ -109,6 +137,13 @@ if (BUILD_PYTHON)
         endif ()
     endif ()
 
+    if (NOT Boost_PYTHON_FOUND)
+        find_package(Boost COMPONENTS python37 ${boost_libs})
+        if ("${Boost_LIBRARIES}" MATCHES ".*(python|PYTHON).*" )
+            set(Boost_PYTHON_FOUND TRUE)
+        endif ()
+    endif ()
+
     if (NOT Boost_PYTHON_FOUND)
         STRING(REGEX REPLACE "([0-9]+\\.[0-9]+).*" "\\1" gentoo_version ${PYTHONLIBS_VERSION_STRING})
         find_package(Boost COMPONENTS python-${gentoo_version} ${boost_libs})
@@ -132,22 +167,23 @@ if(MINGW)
     add_definitions("-Wa,-mbig-obj")
 endif(MINGW)
 
-foreach (family ${FAMILIES})
+foreach (family ${ARCH})
+    message(STATUS "Configuring architecture : ${family}")
     string(TOUPPER ${family} ufamily)
     aux_source_directory(${family}/ ${ufamily}_FILES)    
 
     if (BUILD_GUI)
-       add_subdirectory(gui ${CMAKE_CURRENT_BINARY_DIR}/generated/gui/${family})
+       add_subdirectory(gui ${CMAKE_CURRENT_BINARY_DIR}/generated/gui/${family} EXCLUDE_FROM_ALL)
     endif()
 
     # Add the CLI binary target
-    add_executable(nextpnr-${family} ${COMMON_FILES} ${${ufamily}_FILES} )
+    add_executable(nextpnr-${family} ${COMMON_FILES} ${${ufamily}_FILES})
     install(TARGETS nextpnr-${family} RUNTIME DESTINATION bin)
     target_compile_definitions(nextpnr-${family} PRIVATE MAIN_EXECUTABLE)
 
     if (BUILD_PYTHON)
         # Add the importable Python module target
-        PYTHON_ADD_MODULE(nextpnrpy_${family} EXCLUDE_FROM_ALL ${COMMON_FILES} ${${ufamily}_FILES})
+        PYTHON_ADD_MODULE(nextpnrpy_${family} ${COMMON_FILES} ${${ufamily}_FILES})
     endif()
 
     # Add any new per-architecture targets here
@@ -178,7 +214,7 @@ foreach (family ${FAMILIES})
         # Include family-specific source files to all family targets and set defines appropriately
         target_include_directories(${target} PRIVATE ${family}/ ${CMAKE_CURRENT_BINARY_DIR}/generated/)
         target_compile_definitions(${target} PRIVATE NEXTPNR_NAMESPACE=nextpnr_${family} ARCH_${ufamily} ARCHNAME=${family})
-        target_link_libraries(${target} LINK_PUBLIC ${Boost_LIBRARIES})
+        target_link_libraries(${target} LINK_PUBLIC ${Boost_LIBRARIES} pthread)
         add_sanitizers(${target})
         if (BUILD_GUI)
             target_include_directories(${target} PRIVATE gui/${family}/ gui/)
@@ -193,6 +229,7 @@ endforeach (family)
 
 file(GLOB_RECURSE CLANGFORMAT_FILES *.cc *.h)
 string(REGEX REPLACE "[^;]*/ice40/chipdbs/chipdb-[^;]*.cc" "" CLANGFORMAT_FILES "${CLANGFORMAT_FILES}")
+string(REGEX REPLACE "[^;]*/ecp5/chipdbs/chipdb-[^;]*.cc" "" CLANGFORMAT_FILES "${CLANGFORMAT_FILES}")
 string(REGEX REPLACE "[^;]*/3rdparty[^;]*" "" CLANGFORMAT_FILES "${CLANGFORMAT_FILES}")
 string(REGEX REPLACE "[^;]*/generated[^;]*" "" CLANGFORMAT_FILES "${CLANGFORMAT_FILES}")
 
diff --git a/README.md b/README.md
index 195f08c3..da38500d 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@ Supported Architectures
 -----------------------
 
 - iCE40
+- ECP5
 
 Prequisites
 -----------
@@ -23,23 +24,30 @@ Prequisites
  - For building on macOS, brew utility is needed.
      - Install all needed packages `brew install cmake python boost boost-python3 qt5`
      - Do not forget to add qt5 in path as well `echo 'export PATH="/usr/local/opt/qt/bin:$PATH"' >> ~/.bash_profile`
-
+ - For ECP5 support, you must download [Project Trellis](https://github.com/SymbiFlow/prjtrellis), then follow its instructions to
+   download the latest database and build _libtrellis_.
+ 
+ 
 Building
 --------
 
+ - Specifying target architecture is mandatory use ARCH parameter to set it. It is semicolon separated list.
+    - Use `cmake . -DARCH=all` to build all supported targets
+    - For example `cmake . -DARCH=ice40` would build just ICE40 support
  - Use CMake to generate the Makefiles (only needs to be done when `CMakeLists.txt` changes)
-    - For a debug build, run `cmake -DCMAKE_BUILD_TYPE=Debug .`
-    - For a debug build with HX1K support only, run ` cmake -DCMAKE_BUILD_TYPE=Debug -DICE40_HX1K_ONLY=1 .`
-    - For a release build, run `cmake .`
+    - For an iCE40 debug build, run `cmake -DARCH=ice40 -DCMAKE_BUILD_TYPE=Debug .`
+    - For an iCE40 debug build with HX1K support only, run `cmake -DARCH=ice40 -DCMAKE_BUILD_TYPE=Debug -DICE40_HX1K_ONLY=1 .`
+    - For an iCE40 and ECP5 release build, run `cmake -DARCH="ice40;ecp5" .`
     - Add `-DCMAKE_INSTALL_PREFIX=/your/install/prefix` to use a different install prefix to the default `/usr/local`
-    - For MSVC build with vcpkg use `cmake . -DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/scripts/buildsystems/vcpkg.cmake` using your vcpkg location
+    - For MSVC build with vcpkg use `-DCMAKE_TOOLCHAIN_FILE=C:/vcpkg/scripts/buildsystems/vcpkg.cmake` using your vcpkg location
     - For MSVC x64 build adding `-G"Visual Studio 14 2015 Win64"` is needed.
+    - For ECP5 support, you must also specify the path to Project Trellis using `-DTRELLIS_ROOT=/path/trellis`
  - Use Make to run the build itself
     - For all binary targets, just run `make`
     - For just the iCE40 CLI&GUI binary, run `make nextpnr-ice40`
-    - To build binary without Python support, run `cmake -DBUILD_PYTHON=OFF .`
-    - To build binary without GUI, run `cmake -DBUILD_GUI=OFF .`
-    - For minimal binary without Python and GUI, run `cmake -DBUILD_PYTHON=OFF -DBUILD_GUI=OFF .`
+    - To build binary without Python support, use `-DBUILD_PYTHON=OFF`
+    - To build binary without GUI, use `-DBUILD_GUI=OFF`
+    - For minimal binary without Python and GUI, use `-DBUILD_PYTHON=OFF -DBUILD_GUI=OFF`
     - For just the iCE40 Python module, run `make nextpnrpy_ice40`
     - Using too many parallel jobs may lead to out-of-memory issues due to the significant memory needed to build the chipdbs
     - To install nextpnr, run `make install`
@@ -47,12 +55,12 @@ Building
 Testing
 -------
 
- - To build test binaries as well, run `cmake -DBUILD_TESTS=OFF .` and after run `make tests` to run them, or you can run separate binaries.
- - To use code sanitizers use:
-    - `cmake . -DSANITIZE_ADDRESS=ON`
-    - `cmake . -DSANITIZE_MEMORY=ON -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++`
-    - `cmake . -DSANITIZE_THREAD=ON`
-    - `cmake . -DSANITIZE_UNDEFINED=ON`
+ - To build test binaries as well, use `-DBUILD_TESTS=OFF` and after run `make tests` to run them, or you can run separate binaries.
+ - To use code sanitizers use the `cmake` options:
+    - `-DSANITIZE_ADDRESS=ON`
+    - `-DSANITIZE_MEMORY=ON -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++`
+    - `-DSANITIZE_THREAD=ON`
+    - `-DSANITIZE_UNDEFINED=ON`
  - Running valgrind example `valgrind --leak-check=yes --tool=memcheck ./nextpnr-ice40 --json ice40/blinky.json`
 
 Running
@@ -65,6 +73,12 @@ Running
    produce `blinky.json`.
  - To place-and-route the blinky using nextpnr, run `./nextpnr-ice40 --hx1k --json ice40/blinky.json --pcf ice40/blinky.pcf --asc blinky.asc`
 
+ - For an ECP5 blinky, first synthesise using `yosys blinky.ys` in `ecp5/synth`.
+ - Then run ECP5 place-and route using
+ `./nextpnr-ecp5 --json ecp5/synth/blinky.json --basecfg ecp5/synth/ulx3s_empty.config --bit ecp5/synth/ulx3s.bit`
+    - Note that `ulx3s_empty.config` contains fixed/unknown bits to be copied to the output bitstream
+    - You can also use `--textcfg out.config` to write a text file describing the bitstream for debugging
+  
 Notes
 -------
  
diff --git a/common/nextpnr.h b/common/nextpnr.h
index 37e193b9..50465869 100644
--- a/common/nextpnr.h
+++ b/common/nextpnr.h
@@ -136,7 +136,7 @@ NEXTPNR_NAMESPACE_BEGIN
 
 struct GraphicElement
 {
-    enum
+    enum type_t
     {
         G_NONE,
         G_LINE,
@@ -145,6 +145,14 @@ struct GraphicElement
         G_LABEL
     } type = G_NONE;
 
+    enum style_t
+    {
+        G_FRAME,
+        G_HIDDEN,
+        G_INACTIVE,
+        G_ACTIVE,
+    } style = G_FRAME;
+
     float x1 = 0, y1 = 0, x2 = 0, y2 = 0, z = 0;
     std::string text;
 };
@@ -155,6 +163,12 @@ NEXTPNR_NAMESPACE_END
 
 NEXTPNR_NAMESPACE_BEGIN
 
+struct DecalXY
+{
+    DecalId decal;
+    float x = 0, y = 0;
+};
+
 struct BelPin
 {
     BelId bel;
@@ -253,6 +267,31 @@ struct BaseCtx
         delete idstring_str_to_idx;
         delete idstring_idx_to_str;
     }
+
+    Context *getCtx() { return reinterpret_cast<Context *>(this); }
+
+    const Context *getCtx() const { return reinterpret_cast<const Context *>(this); }
+
+    // --------------------------------------------------------------
+
+    bool allUiReload = false;
+    bool frameUiReload = false;
+    std::unordered_set<BelId> belUiReload;
+    std::unordered_set<WireId> wireUiReload;
+    std::unordered_set<PipId> pipUiReload;
+    std::unordered_set<GroupId> groupUiReload;
+
+    void refreshUi() { allUiReload = true; }
+
+    void refreshUiFrame() { frameUiReload = true; }
+
+    void refreshUiBel(BelId bel) { belUiReload.insert(bel); }
+
+    void refreshUiWire(WireId wire) { wireUiReload.insert(wire); }
+
+    void refreshUiPip(PipId pip) { pipUiReload.insert(pip); }
+
+    void refreshUiGroup(GroupId group) { groupUiReload.insert(group); }
 };
 
 NEXTPNR_NAMESPACE_END
@@ -273,6 +312,11 @@ struct Context : Arch
 
     // --------------------------------------------------------------
 
+    // provided by router1.cc
+    bool getActualRouteDelay(WireId src_wire, WireId dst_wire, delay_t &delay);
+
+    // --------------------------------------------------------------
+
     uint64_t rngstate = 0x3141592653589793;
 
     uint64_t rng64()
diff --git a/common/place_sa.cc b/common/placer1.cc
similarity index 99%
rename from common/place_sa.cc
rename to common/placer1.cc
index ab161c57..53295a91 100644
--- a/common/place_sa.cc
+++ b/common/placer1.cc
@@ -21,7 +21,7 @@
  *
  */
 
-#include "place_sa.h"
+#include "placer1.h"
 #include <algorithm>
 #include <cmath>
 #include <iostream>
@@ -429,7 +429,7 @@ class SAPlacer
     const float post_legalise_dia_scale = 2;
 };
 
-bool place_design_sa(Context *ctx)
+bool placer1(Context *ctx)
 {
     try {
         SAPlacer placer(ctx);
diff --git a/common/place_sa.h b/common/placer1.h
similarity index 95%
rename from common/place_sa.h
rename to common/placer1.h
index 1fd8c712..477fae56 100644
--- a/common/place_sa.h
+++ b/common/placer1.h
@@ -23,7 +23,7 @@
 
 NEXTPNR_NAMESPACE_BEGIN
 
-extern bool place_design_sa(Context *ctx);
+extern bool placer1(Context *ctx);
 
 NEXTPNR_NAMESPACE_END
 
diff --git a/common/pybindings.cc b/common/pybindings.cc
index 64055755..061dfc47 100644
--- a/common/pybindings.cc
+++ b/common/pybindings.cc
@@ -110,13 +110,13 @@ BOOST_PYTHON_MODULE(MODULE_NAME)
     readwrite_wrapper<CellInfo &, decltype(&CellInfo::belStrength), &CellInfo::belStrength, pass_through<PlaceStrength>,
                       pass_through<PlaceStrength>>::def_wrap(ci_cls, "belStrength");
     readonly_wrapper<CellInfo &, decltype(&CellInfo::pins), &CellInfo::pins, wrap_context<PinMap &>>::def_wrap(ci_cls,
-                                                                                                             "pins");
+                                                                                                               "pins");
 
     auto pi_cls = class_<ContextualWrapper<PortInfo &>>("PortInfo", no_init);
     readwrite_wrapper<PortInfo &, decltype(&PortInfo::name), &PortInfo::name, conv_to_str<IdString>,
                       conv_from_str<IdString>>::def_wrap(pi_cls, "name");
     readonly_wrapper<PortInfo &, decltype(&PortInfo::net), &PortInfo::net, deref_and_wrap<NetInfo>>::def_wrap(pi_cls,
-                                                                                                            "net");
+                                                                                                              "net");
     readwrite_wrapper<PortInfo &, decltype(&PortInfo::type), &PortInfo::type, pass_through<PortType>,
                       pass_through<PortType>>::def_wrap(pi_cls, "type");
 
@@ -131,11 +131,11 @@ BOOST_PYTHON_MODULE(MODULE_NAME)
     readonly_wrapper<NetInfo &, decltype(&NetInfo::users), &NetInfo::users, wrap_context<PortVector &>>::def_wrap(
             ni_cls, "users");
     readonly_wrapper<NetInfo &, decltype(&NetInfo::wires), &NetInfo::wires, wrap_context<WireMap &>>::def_wrap(ni_cls,
-                                                                                                             "wires");
+                                                                                                               "wires");
 
     auto pr_cls = class_<ContextualWrapper<PortRef &>>("PortRef", no_init);
     readonly_wrapper<PortRef &, decltype(&PortRef::cell), &PortRef::cell, deref_and_wrap<CellInfo>>::def_wrap(pr_cls,
-                                                                                                            "cell");
+                                                                                                              "cell");
     readwrite_wrapper<PortRef &, decltype(&PortRef::port), &PortRef::port, conv_to_str<IdString>,
                       conv_from_str<IdString>>::def_wrap(pr_cls, "port");
     readwrite_wrapper<PortRef &, decltype(&PortRef::budget), &PortRef::budget, pass_through<delay_t>,
@@ -151,7 +151,9 @@ BOOST_PYTHON_MODULE(MODULE_NAME)
     arch_wrap_python();
 }
 
+#ifdef MAIN_EXECUTABLE
 static wchar_t *program;
+#endif
 
 void init_python(const char *executable, bool first)
 {
diff --git a/common/route.cc b/common/router1.cc
similarity index 99%
rename from common/route.cc
rename to common/router1.cc
index 82525fcc..94c7070e 100644
--- a/common/route.cc
+++ b/common/router1.cc
@@ -21,7 +21,7 @@
 #include <queue>
 
 #include "log.h"
-#include "route.h"
+#include "router1.h"
 
 namespace {
 
@@ -402,7 +402,7 @@ struct Router
 
 NEXTPNR_NAMESPACE_BEGIN
 
-bool route_design(Context *ctx)
+bool router1(Context *ctx)
 {
     try {
         int totalVisitCnt = 0, totalRevisitCnt = 0, totalOvertimeRevisitCnt = 0;
@@ -643,10 +643,10 @@ bool route_design(Context *ctx)
     }
 }
 
-bool get_actual_route_delay(Context *ctx, WireId src_wire, WireId dst_wire, delay_t &delay)
+bool Context::getActualRouteDelay(WireId src_wire, WireId dst_wire, delay_t &delay)
 {
     RipupScoreboard scores;
-    Router router(ctx, scores, src_wire, dst_wire);
+    Router router(this, scores, src_wire, dst_wire);
     if (router.routedOkay)
         delay = router.visited.at(dst_wire).delay;
     return router.routedOkay;
diff --git a/ice40/pack.h b/common/router1.h
similarity index 87%
rename from ice40/pack.h
rename to common/router1.h
index cdebdd79..38552c58 100644
--- a/ice40/pack.h
+++ b/common/router1.h
@@ -2,7 +2,6 @@
  *  nextpnr -- Next Generation Place and Route
  *
  *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
- *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
  *
  *  Permission to use, copy, modify, and/or distribute this software for any
  *  purpose with or without fee is hereby granted, provided that the above
@@ -18,15 +17,15 @@
  *
  */
 
-#ifndef PACK_H
-#define PACK_H
+#ifndef ROUTER1_H
+#define ROUTER1_H
 
 #include "nextpnr.h"
 
 NEXTPNR_NAMESPACE_BEGIN
 
-bool pack_design(Context *ctx);
+extern bool router1(Context *ctx);
 
 NEXTPNR_NAMESPACE_END
 
-#endif // ROUTE_H
+#endif // ROUTER1_H
diff --git a/common/util.h b/common/util.h
index 60eb35af..8f361dc8 100644
--- a/common/util.h
+++ b/common/util.h
@@ -39,6 +39,18 @@ ValueType get_or_default(const Container &ct, const KeyType &key, ValueType def
         return found->second;
 };
 
+// Get a value from a map-style container, returning default if value is not
+// found (forces string)
+template <typename Container, typename KeyType>
+std::string str_or_default(const Container &ct, const KeyType &key, std::string def = "")
+{
+    auto found = ct.find(key);
+    if (found == ct.end())
+        return def;
+    else
+        return found->second;
+};
+
 // Get a value from a map-style container, converting to int, and returning
 // default if value is not found
 template <typename Container, typename KeyType> int int_or_default(const Container &ct, const KeyType &key, int def = 0)
@@ -84,6 +96,7 @@ inline const NetInfo *get_net_or_empty(const CellInfo *cell, const IdString port
     else
         return nullptr;
 };
+
 NEXTPNR_NAMESPACE_END
 
 #endif
diff --git a/ecp5/.gitignore b/ecp5/.gitignore
new file mode 100644
index 00000000..3249a7bb
--- /dev/null
+++ b/ecp5/.gitignore
@@ -0,0 +1,2 @@
+__pycache__
+chipdbs/
diff --git a/ecp5/arch.cc b/ecp5/arch.cc
new file mode 100644
index 00000000..51f4db84
--- /dev/null
+++ b/ecp5/arch.cc
@@ -0,0 +1,333 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include <algorithm>
+#include <cmath>
+#include <cstring>
+#include "log.h"
+#include "nextpnr.h"
+#include "placer1.h"
+#include "router1.h"
+#include "util.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+static std::tuple<int, int, std::string> split_identifier_name(const std::string &name)
+{
+    size_t first_slash = name.find('/');
+    NPNR_ASSERT(first_slash != std::string::npos);
+    size_t second_slash = name.find('/', first_slash + 1);
+    NPNR_ASSERT(second_slash != std::string::npos);
+    return std::make_tuple(std::stoi(name.substr(1, first_slash)),
+                           std::stoi(name.substr(first_slash + 2, second_slash - first_slash)),
+                           name.substr(second_slash + 1));
+};
+
+// -----------------------------------------------------------------------
+
+IdString Arch::belTypeToId(BelType type) const
+{
+    if (type == TYPE_TRELLIS_SLICE)
+        return id("TRELLIS_SLICE");
+    if (type == TYPE_TRELLIS_IO)
+        return id("TRELLIS_IO");
+    return IdString();
+}
+
+BelType Arch::belTypeFromId(IdString type) const
+{
+    if (type == id("TRELLIS_SLICE"))
+        return TYPE_TRELLIS_SLICE;
+    if (type == id("TRELLIS_IO"))
+        return TYPE_TRELLIS_IO;
+    return TYPE_NONE;
+}
+
+// -----------------------------------------------------------------------
+
+void IdString::initialize_arch(const BaseCtx *ctx)
+{
+#define X(t) initialize_add(ctx, #t, PIN_##t);
+
+#include "portpins.inc"
+
+#undef X
+}
+
+IdString Arch::portPinToId(PortPin type) const
+{
+    IdString ret;
+    if (type > 0 && type < PIN_MAXIDX)
+        ret.index = type;
+    return ret;
+}
+
+PortPin Arch::portPinFromId(IdString type) const
+{
+    if (type.index > 0 && type.index < PIN_MAXIDX)
+        return PortPin(type.index);
+    return PIN_NONE;
+}
+
+// -----------------------------------------------------------------------
+
+static const ChipInfoPOD *get_chip_info(const RelPtr<ChipInfoPOD> *ptr) { return ptr->get(); }
+
+#if defined(_MSC_VER)
+void load_chipdb();
+#endif
+
+#define LFE5U_45F_ONLY
+
+Arch::Arch(ArchArgs args) : args(args)
+{
+#if defined(_MSC_VER)
+    load_chipdb();
+#endif
+#ifdef LFE5U_45F_ONLY
+    if (args.type == ArchArgs::LFE5U_45F) {
+        chip_info = get_chip_info(reinterpret_cast<const RelPtr<ChipInfoPOD> *>(chipdb_blob_45k));
+    } else {
+        log_error("Unsupported ECP5 chip type.\n");
+    }
+#else
+    if (args.type == ArchArgs::LFE5U_25F) {
+        chip_info = get_chip_info(reinterpret_cast<const RelPtr<ChipInfoPOD> *>(chipdb_blob_25k));
+    } else if (args.type == ArchArgs::LFE5U_45F) {
+        chip_info = get_chip_info(reinterpret_cast<const RelPtr<ChipInfoPOD> *>(chipdb_blob_45k));
+    } else if (args.type == ArchArgs::LFE5U_85F) {
+        chip_info = get_chip_info(reinterpret_cast<const RelPtr<ChipInfoPOD> *>(chipdb_blob_85k));
+    } else {
+        log_error("Unsupported ECP5 chip type.\n");
+    }
+#endif
+}
+
+// -----------------------------------------------------------------------
+
+std::string Arch::getChipName()
+{
+
+    if (args.type == ArchArgs::LFE5U_25F) {
+        return "LFE5U-25F";
+    } else if (args.type == ArchArgs::LFE5U_45F) {
+        return "LFE5U-45F";
+    } else if (args.type == ArchArgs::LFE5U_85F) {
+        return "LFE5U-85F";
+    } else {
+        log_error("Unknown chip\n");
+    }
+}
+
+// -----------------------------------------------------------------------
+
+IdString Arch::archArgsToId(ArchArgs args) const
+{
+    if (args.type == ArchArgs::LFE5U_25F)
+        return id("lfe5u_25f");
+    if (args.type == ArchArgs::LFE5U_45F)
+        return id("lfe5u_45f");
+    if (args.type == ArchArgs::LFE5U_85F)
+        return id("lfe5u_85f");
+    return IdString();
+}
+
+// -----------------------------------------------------------------------
+
+BelId Arch::getBelByName(IdString name) const
+{
+    BelId ret;
+    auto it = bel_by_name.find(name);
+    if (it != bel_by_name.end())
+        return it->second;
+
+    Location loc;
+    std::string basename;
+    std::tie(loc.x, loc.y, basename) = split_identifier_name(name.str(this));
+    ret.location = loc;
+    const LocationTypePOD *loci = locInfo(ret);
+    for (int i = 0; i < loci->num_bels; i++) {
+        if (std::strcmp(loci->bel_data[i].name.get(), basename.c_str()) == 0) {
+            ret.index = i;
+            break;
+        }
+    }
+    if (ret.index >= 0)
+        bel_by_name[name] = ret;
+    return ret;
+}
+
+BelRange Arch::getBelsAtSameTile(BelId bel) const
+{
+    BelRange br;
+    NPNR_ASSERT(bel != BelId());
+    br.b.cursor_tile = bel.location.y * chip_info->width + bel.location.x;
+    br.e.cursor_tile = bel.location.y * chip_info->width + bel.location.x;
+    br.b.cursor_index = 0;
+    br.e.cursor_index = locInfo(bel)->num_bels;
+    return br;
+}
+
+WireId Arch::getWireBelPin(BelId bel, PortPin pin) const
+{
+    WireId ret;
+
+    NPNR_ASSERT(bel != BelId());
+
+    int num_bel_wires = locInfo(bel)->bel_data[bel.index].num_bel_wires;
+    const BelWirePOD *bel_wires = locInfo(bel)->bel_data[bel.index].bel_wires.get();
+    for (int i = 0; i < num_bel_wires; i++)
+        if (bel_wires[i].port == pin) {
+            ret.location = bel.location + bel_wires[i].rel_wire_loc;
+            ret.index = bel_wires[i].wire_index;
+            break;
+        }
+
+    return ret;
+}
+
+// -----------------------------------------------------------------------
+
+WireId Arch::getWireByName(IdString name) const
+{
+    WireId ret;
+    auto it = wire_by_name.find(name);
+    if (it != wire_by_name.end())
+        return it->second;
+
+    Location loc;
+    std::string basename;
+    std::tie(loc.x, loc.y, basename) = split_identifier_name(name.str(this));
+    ret.location = loc;
+    const LocationTypePOD *loci = locInfo(ret);
+    for (int i = 0; i < loci->num_wires; i++) {
+        if (std::strcmp(loci->wire_data[i].name.get(), basename.c_str()) == 0) {
+            ret.index = i;
+            ret.location = loc;
+            break;
+        }
+    }
+    if (ret.index >= 0)
+        wire_by_name[name] = ret;
+    else
+        ret.location = Location();
+    return ret;
+}
+
+// -----------------------------------------------------------------------
+
+PipId Arch::getPipByName(IdString name) const
+{
+    auto it = pip_by_name.find(name);
+    if (it != pip_by_name.end())
+        return it->second;
+
+    PipId ret;
+    Location loc;
+    std::string basename;
+    std::tie(loc.x, loc.y, basename) = split_identifier_name(name.str(this));
+    const LocationTypePOD *loci = locInfo(ret);
+    for (int i = 0; i < loci->num_pips; i++) {
+        PipId curr;
+        curr.location = loc;
+        curr.index = i;
+        pip_by_name[getPipName(curr)] = curr;
+    }
+    return pip_by_name[name];
+}
+
+IdString Arch::getPipName(PipId pip) const
+{
+    NPNR_ASSERT(pip != PipId());
+
+    int x = pip.location.x;
+    int y = pip.location.y;
+
+    std::string src_name = getWireName(getPipSrcWire(pip)).str(this);
+    std::replace(src_name.begin(), src_name.end(), '/', '.');
+
+    std::string dst_name = getWireName(getPipDstWire(pip)).str(this);
+    std::replace(dst_name.begin(), dst_name.end(), '/', '.');
+
+    return id("X" + std::to_string(x) + "/Y" + std::to_string(y) + "/" + src_name + ".->." + dst_name);
+}
+
+// -----------------------------------------------------------------------
+
+BelId Arch::getPackagePinBel(const std::string &pin) const { return BelId(); }
+
+std::string Arch::getBelPackagePin(BelId bel) const { return ""; }
+// -----------------------------------------------------------------------
+
+void Arch::estimatePosition(BelId bel, int &x, int &y, bool &gb) const
+{
+    x = bel.location.x;
+    y = bel.location.y;
+    gb = false;
+}
+
+delay_t Arch::estimateDelay(WireId src, WireId dst) const
+{
+    return abs(src.location.x - dst.location.x) + abs(src.location.y - dst.location.y);
+}
+
+// -----------------------------------------------------------------------
+
+bool Arch::place() { return placer1(getCtx()); }
+
+bool Arch::route() { return router1(getCtx()); }
+
+// -----------------------------------------------------------------------
+
+std::vector<GraphicElement> Arch::getDecalGraphics(DecalId decalId) const
+{
+    std::vector<GraphicElement> ret;
+    // FIXME
+    return ret;
+}
+
+DecalXY Arch::getFrameDecal() const { return {}; }
+
+DecalXY Arch::getBelDecal(BelId bel) const { return {}; }
+
+DecalXY Arch::getWireDecal(WireId wire) const { return {}; }
+
+DecalXY Arch::getPipDecal(PipId pip) const { return {}; };
+
+DecalXY Arch::getGroupDecal(GroupId pip) const { return {}; };
+
+// -----------------------------------------------------------------------
+
+bool Arch::isValidBelForCell(CellInfo *cell, BelId bel) const { return true; }
+
+bool Arch::isBelLocationValid(BelId bel) const { return true; }
+
+// -----------------------------------------------------------------------
+
+bool Arch::getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort, delay_t &delay) const
+{
+    return false;
+}
+
+IdString Arch::getPortClock(const CellInfo *cell, IdString port) const { return IdString(); }
+
+bool Arch::isClockPort(const CellInfo *cell, IdString port) const { return false; }
+
+NEXTPNR_NAMESPACE_END
diff --git a/ecp5/arch.h b/ecp5/arch.h
new file mode 100644
index 00000000..930c488e
--- /dev/null
+++ b/ecp5/arch.h
@@ -0,0 +1,765 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef NEXTPNR_H
+#error Include "arch.h" via "nextpnr.h" only.
+#endif
+
+#include <sstream>
+
+NEXTPNR_NAMESPACE_BEGIN
+
+/**** Everything in this section must be kept in sync with chipdb.py ****/
+
+template <typename T> struct RelPtr
+{
+    int32_t offset;
+
+    // void set(const T *ptr) {
+    //     offset = reinterpret_cast<const char*>(ptr) -
+    //              reinterpret_cast<const char*>(this);
+    // }
+
+    const T *get() const { return reinterpret_cast<const T *>(reinterpret_cast<const char *>(this) + offset); }
+
+    const T &operator[](size_t index) const { return get()[index]; }
+
+    const T &operator*() const { return *(get()); }
+
+    const T *operator->() const { return get(); }
+};
+
+NPNR_PACKED_STRUCT(struct BelWirePOD {
+    LocationPOD rel_wire_loc;
+    int32_t wire_index;
+    PortPin port;
+});
+
+NPNR_PACKED_STRUCT(struct BelInfoPOD {
+    RelPtr<char> name;
+    BelType type;
+    int32_t num_bel_wires;
+    RelPtr<BelWirePOD> bel_wires;
+});
+
+NPNR_PACKED_STRUCT(struct BelPortPOD {
+    LocationPOD rel_bel_loc;
+    int32_t bel_index;
+    PortPin port;
+});
+
+NPNR_PACKED_STRUCT(struct PipInfoPOD {
+    LocationPOD rel_src_loc, rel_dst_loc;
+    int32_t src_idx, dst_idx;
+    int32_t delay;
+    int16_t tile_type;
+    int8_t pip_type;
+    int8_t padding_0;
+});
+
+NPNR_PACKED_STRUCT(struct PipLocatorPOD {
+    LocationPOD rel_loc;
+    int32_t index;
+});
+
+NPNR_PACKED_STRUCT(struct WireInfoPOD {
+    RelPtr<char> name;
+    int32_t num_uphill, num_downhill;
+    RelPtr<PipLocatorPOD> pips_uphill, pips_downhill;
+
+    int32_t num_bels_downhill;
+    BelPortPOD bel_uphill;
+    RelPtr<BelPortPOD> bels_downhill;
+});
+
+NPNR_PACKED_STRUCT(struct LocationTypePOD {
+    int32_t num_bels, num_wires, num_pips;
+    RelPtr<BelInfoPOD> bel_data;
+    RelPtr<WireInfoPOD> wire_data;
+    RelPtr<PipInfoPOD> pip_data;
+});
+
+NPNR_PACKED_STRUCT(struct ChipInfoPOD {
+    int32_t width, height;
+    int32_t num_tiles;
+    int32_t num_location_types;
+    RelPtr<LocationTypePOD> locations;
+    RelPtr<int32_t> location_type;
+    RelPtr<RelPtr<char>> tiletype_names;
+});
+
+#if defined(_MSC_VER)
+extern const char *chipdb_blob_25k;
+extern const char *chipdb_blob_45k;
+extern const char *chipdb_blob_85k;
+#else
+extern const char chipdb_blob_25k[];
+extern const char chipdb_blob_45k[];
+extern const char chipdb_blob_85k[];
+#endif
+
+/************************ End of chipdb section. ************************/
+
+struct BelIterator
+{
+    const ChipInfoPOD *chip;
+    int cursor_index;
+    int cursor_tile;
+
+    BelIterator operator++()
+    {
+        cursor_index++;
+        while (cursor_tile < chip->num_tiles &&
+               cursor_index >= chip->locations[chip->location_type[cursor_tile]].num_bels) {
+            cursor_index = 0;
+            cursor_tile++;
+        }
+        return *this;
+    }
+    BelIterator operator++(int)
+    {
+        BelIterator prior(*this);
+        ++(*this);
+        return prior;
+    }
+
+    bool operator!=(const BelIterator &other) const
+    {
+        return cursor_index != other.cursor_index || cursor_tile != other.cursor_tile;
+    }
+
+    bool operator==(const BelIterator &other) const
+    {
+        return cursor_index == other.cursor_index && cursor_tile == other.cursor_tile;
+    }
+
+    BelId operator*() const
+    {
+        BelId ret;
+        ret.location.x = cursor_tile % chip->width;
+        ret.location.y = cursor_tile / chip->width;
+        ret.index = cursor_index;
+        return ret;
+    }
+};
+
+struct BelRange
+{
+    BelIterator b, e;
+    BelIterator begin() const { return b; }
+    BelIterator end() const { return e; }
+};
+
+// -----------------------------------------------------------------------
+
+struct BelPinIterator
+{
+    const BelPortPOD *ptr = nullptr;
+    Location wire_loc;
+    void operator++() { ptr++; }
+    bool operator!=(const BelPinIterator &other) const { return ptr != other.ptr; }
+
+    BelPin operator*() const
+    {
+        BelPin ret;
+        ret.bel.index = ptr->bel_index;
+        ret.bel.location = wire_loc + ptr->rel_bel_loc;
+        ret.pin = ptr->port;
+        return ret;
+    }
+};
+
+struct BelPinRange
+{
+    BelPinIterator b, e;
+    BelPinIterator begin() const { return b; }
+    BelPinIterator end() const { return e; }
+};
+
+// -----------------------------------------------------------------------
+
+struct WireIterator
+{
+    const ChipInfoPOD *chip;
+    int cursor_index;
+    int cursor_tile;
+
+    WireIterator operator++()
+    {
+        cursor_index++;
+        while (cursor_tile < chip->num_tiles &&
+               cursor_index >= chip->locations[chip->location_type[cursor_tile]].num_wires) {
+            cursor_index = 0;
+            cursor_tile++;
+        }
+        return *this;
+    }
+    WireIterator operator++(int)
+    {
+        WireIterator prior(*this);
+        ++(*this);
+        return prior;
+    }
+
+    bool operator!=(const WireIterator &other) const
+    {
+        return cursor_index != other.cursor_index || cursor_tile != other.cursor_tile;
+    }
+
+    bool operator==(const WireIterator &other) const
+    {
+        return cursor_index == other.cursor_index && cursor_tile == other.cursor_tile;
+    }
+
+    WireId operator*() const
+    {
+        WireId ret;
+        ret.location.x = cursor_tile % chip->width;
+        ret.location.y = cursor_tile / chip->width;
+        ret.index = cursor_index;
+        return ret;
+    }
+};
+
+struct WireRange
+{
+    WireIterator b, e;
+    WireIterator begin() const { return b; }
+    WireIterator end() const { return e; }
+};
+
+// -----------------------------------------------------------------------
+
+struct AllPipIterator
+{
+    const ChipInfoPOD *chip;
+    int cursor_index;
+    int cursor_tile;
+
+    AllPipIterator operator++()
+    {
+        cursor_index++;
+        while (cursor_tile < chip->num_tiles &&
+               cursor_index >= chip->locations[chip->location_type[cursor_tile]].num_pips) {
+            cursor_index = 0;
+            cursor_tile++;
+        }
+        return *this;
+    }
+    AllPipIterator operator++(int)
+    {
+        AllPipIterator prior(*this);
+        ++(*this);
+        return prior;
+    }
+
+    bool operator!=(const AllPipIterator &other) const
+    {
+        return cursor_index != other.cursor_index || cursor_tile != other.cursor_tile;
+    }
+
+    bool operator==(const AllPipIterator &other) const
+    {
+        return cursor_index == other.cursor_index && cursor_tile == other.cursor_tile;
+    }
+
+    PipId operator*() const
+    {
+        PipId ret;
+        ret.location.x = cursor_tile % chip->width;
+        ret.location.y = cursor_tile / chip->width;
+        ret.index = cursor_index;
+        return ret;
+    }
+};
+
+struct AllPipRange
+{
+    AllPipIterator b, e;
+    AllPipIterator begin() const { return b; }
+    AllPipIterator end() const { return e; }
+};
+
+// -----------------------------------------------------------------------
+
+struct PipIterator
+{
+
+    const PipLocatorPOD *cursor = nullptr;
+    Location wire_loc;
+
+    void operator++() { cursor++; }
+    bool operator!=(const PipIterator &other) const { return cursor != other.cursor; }
+
+    PipId operator*() const
+    {
+        PipId ret;
+        ret.index = cursor->index;
+        ret.location = wire_loc + cursor->rel_loc;
+        return ret;
+    }
+};
+
+struct PipRange
+{
+    PipIterator b, e;
+    PipIterator begin() const { return b; }
+    PipIterator end() const { return e; }
+};
+
+struct ArchArgs
+{
+    enum
+    {
+        NONE,
+        LFE5U_25F,
+        LFE5U_45F,
+        LFE5U_85F,
+    } type = NONE;
+    std::string package;
+    int speed = 6;
+};
+
+struct Arch : BaseCtx
+{
+    const ChipInfoPOD *chip_info;
+
+    mutable std::unordered_map<IdString, BelId> bel_by_name;
+    mutable std::unordered_map<IdString, WireId> wire_by_name;
+    mutable std::unordered_map<IdString, PipId> pip_by_name;
+
+    std::unordered_map<BelId, IdString> bel_to_cell;
+    std::unordered_map<WireId, IdString> wire_to_net;
+    std::unordered_map<PipId, IdString> pip_to_net;
+    std::unordered_map<PipId, IdString> switches_locked;
+
+    ArchArgs args;
+    Arch(ArchArgs args);
+
+    std::string getChipName();
+
+    IdString archId() const { return id("ecp5"); }
+    IdString archArgsToId(ArchArgs args) const;
+
+    IdString belTypeToId(BelType type) const;
+    BelType belTypeFromId(IdString id) const;
+
+    IdString portPinToId(PortPin type) const;
+    PortPin portPinFromId(IdString id) const;
+
+    // -------------------------------------------------
+
+    BelId getBelByName(IdString name) const;
+
+    template <typename Id> const LocationTypePOD *locInfo(Id &id) const
+    {
+        return &(chip_info->locations[chip_info->location_type[id.location.y * chip_info->width + id.location.x]]);
+    }
+
+    IdString getBelName(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        std::stringstream name;
+        name << "X" << bel.location.x << "/Y" << bel.location.y << "/" << locInfo(bel)->bel_data[bel.index].name.get();
+        return id(name.str());
+    }
+
+    uint32_t getBelChecksum(BelId bel) const { return bel.index; }
+
+    void bindBel(BelId bel, IdString cell, PlaceStrength strength)
+    {
+        NPNR_ASSERT(bel != BelId());
+        NPNR_ASSERT(bel_to_cell[bel] == IdString());
+        bel_to_cell[bel] = cell;
+        cells[cell]->bel = bel;
+        cells[cell]->belStrength = strength;
+    }
+
+    void unbindBel(BelId bel)
+    {
+        NPNR_ASSERT(bel != BelId());
+        NPNR_ASSERT(bel_to_cell[bel] != IdString());
+        cells[bel_to_cell[bel]]->bel = BelId();
+        cells[bel_to_cell[bel]]->belStrength = STRENGTH_NONE;
+        bel_to_cell[bel] = IdString();
+    }
+
+    bool checkBelAvail(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        return bel_to_cell.find(bel) == bel_to_cell.end() || bel_to_cell.at(bel) == IdString();
+    }
+
+    IdString getBoundBelCell(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        if (bel_to_cell.find(bel) == bel_to_cell.end())
+            return IdString();
+        else
+            return bel_to_cell.at(bel);
+    }
+
+    IdString getConflictingBelCell(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        if (bel_to_cell.find(bel) == bel_to_cell.end())
+            return IdString();
+        else
+            return bel_to_cell.at(bel);
+    }
+
+    BelRange getBels() const
+    {
+        BelRange range;
+        range.b.cursor_tile = 0;
+        range.b.cursor_index = -1;
+        range.b.chip = chip_info;
+        ++range.b; //-1 and then ++ deals with the case of no Bels in the first tile
+        range.e.cursor_tile = chip_info->width * chip_info->height;
+        range.e.cursor_index = 0;
+        range.e.chip = chip_info;
+        return range;
+    }
+
+    BelRange getBelsByType(BelType type) const
+    {
+        BelRange range;
+// FIXME
+#if 0
+        if (type == "TYPE_A") {
+			range.b.cursor = bels_type_a_begin;
+			range.e.cursor = bels_type_a_end;
+		}
+		...
+#endif
+        return range;
+    }
+
+    BelRange getBelsAtSameTile(BelId bel) const;
+
+    BelType getBelType(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        return locInfo(bel)->bel_data[bel.index].type;
+    }
+
+    WireId getWireBelPin(BelId bel, PortPin pin) const;
+
+    BelPin getBelPinUphill(WireId wire) const
+    {
+        BelPin ret;
+        NPNR_ASSERT(wire != WireId());
+
+        if (locInfo(wire)->wire_data[wire.index].bel_uphill.bel_index >= 0) {
+            ret.bel.index = locInfo(wire)->wire_data[wire.index].bel_uphill.bel_index;
+            ret.bel.location = wire.location + locInfo(wire)->wire_data[wire.index].bel_uphill.rel_bel_loc;
+            ret.pin = locInfo(wire)->wire_data[wire.index].bel_uphill.port;
+        }
+
+        return ret;
+    }
+
+    BelPinRange getBelPinsDownhill(WireId wire) const
+    {
+        BelPinRange range;
+        NPNR_ASSERT(wire != WireId());
+        range.b.ptr = locInfo(wire)->wire_data[wire.index].bels_downhill.get();
+        range.b.wire_loc = wire.location;
+        range.e.ptr = range.b.ptr + locInfo(wire)->wire_data[wire.index].num_bels_downhill;
+        range.e.wire_loc = wire.location;
+        return range;
+    }
+
+    // -------------------------------------------------
+
+    WireId getWireByName(IdString name) const;
+
+    IdString getWireName(WireId wire) const
+    {
+        NPNR_ASSERT(wire != WireId());
+
+        std::stringstream name;
+        name << "X" << wire.location.x << "/Y" << wire.location.y << "/"
+             << locInfo(wire)->wire_data[wire.index].name.get();
+        return id(name.str());
+    }
+
+    uint32_t getWireChecksum(WireId wire) const { return wire.index; }
+
+    void bindWire(WireId wire, IdString net, PlaceStrength strength)
+    {
+        NPNR_ASSERT(wire != WireId());
+        NPNR_ASSERT(wire_to_net[wire] == IdString());
+        wire_to_net[wire] = net;
+        nets[net]->wires[wire].pip = PipId();
+        nets[net]->wires[wire].strength = strength;
+    }
+
+    void unbindWire(WireId wire)
+    {
+        NPNR_ASSERT(wire != WireId());
+        NPNR_ASSERT(wire_to_net[wire] != IdString());
+
+        auto &net_wires = nets[wire_to_net[wire]]->wires;
+        auto it = net_wires.find(wire);
+        NPNR_ASSERT(it != net_wires.end());
+
+        auto pip = it->second.pip;
+        if (pip != PipId()) {
+            pip_to_net[pip] = IdString();
+        }
+
+        net_wires.erase(it);
+        wire_to_net[wire] = IdString();
+    }
+
+    bool checkWireAvail(WireId wire) const
+    {
+        NPNR_ASSERT(wire != WireId());
+        return wire_to_net.find(wire) == wire_to_net.end() || wire_to_net.at(wire) == IdString();
+    }
+
+    IdString getBoundWireNet(WireId wire) const
+    {
+        NPNR_ASSERT(wire != WireId());
+        if (wire_to_net.find(wire) == wire_to_net.end())
+            return IdString();
+        else
+            return wire_to_net.at(wire);
+    }
+
+    IdString getConflictingWireNet(WireId wire) const
+    {
+        NPNR_ASSERT(wire != WireId());
+        if (wire_to_net.find(wire) == wire_to_net.end())
+            return IdString();
+        else
+            return wire_to_net.at(wire);
+    }
+
+    WireRange getWires() const
+    {
+        WireRange range;
+        range.b.cursor_tile = 0;
+        range.b.cursor_index = -1;
+        range.b.chip = chip_info;
+        ++range.b; //-1 and then ++ deals with the case of no wries in the first tile
+        range.e.cursor_tile = chip_info->width * chip_info->height;
+        range.e.cursor_index = 0;
+        range.e.chip = chip_info;
+        return range;
+    }
+
+    // -------------------------------------------------
+
+    PipId getPipByName(IdString name) const;
+    IdString getPipName(PipId pip) const;
+
+    uint32_t getPipChecksum(PipId pip) const { return pip.index; }
+
+    void bindPip(PipId pip, IdString net, PlaceStrength strength)
+    {
+        NPNR_ASSERT(pip != PipId());
+        NPNR_ASSERT(pip_to_net[pip] == IdString());
+
+        pip_to_net[pip] = net;
+
+        WireId dst;
+        dst.index = locInfo(pip)->pip_data[pip.index].dst_idx;
+        dst.location = pip.location + locInfo(pip)->pip_data[pip.index].rel_dst_loc;
+        NPNR_ASSERT(wire_to_net[dst] == IdString());
+        wire_to_net[dst] = net;
+        nets[net]->wires[dst].pip = pip;
+        nets[net]->wires[dst].strength = strength;
+    }
+
+    void unbindPip(PipId pip)
+    {
+        NPNR_ASSERT(pip != PipId());
+        NPNR_ASSERT(pip_to_net[pip] != IdString());
+
+        WireId dst;
+        dst.index = locInfo(pip)->pip_data[pip.index].dst_idx;
+        dst.location = pip.location + locInfo(pip)->pip_data[pip.index].rel_dst_loc;
+        NPNR_ASSERT(wire_to_net[dst] != IdString());
+        wire_to_net[dst] = IdString();
+        nets[pip_to_net[pip]]->wires.erase(dst);
+
+        pip_to_net[pip] = IdString();
+    }
+
+    bool checkPipAvail(PipId pip) const
+    {
+        NPNR_ASSERT(pip != PipId());
+        return pip_to_net.find(pip) == pip_to_net.end() || pip_to_net.at(pip) == IdString();
+    }
+
+    IdString getBoundPipNet(PipId pip) const
+    {
+        NPNR_ASSERT(pip != PipId());
+        if (pip_to_net.find(pip) == pip_to_net.end())
+            return IdString();
+        else
+            return pip_to_net.at(pip);
+    }
+
+    IdString getConflictingPipNet(PipId pip) const
+    {
+        NPNR_ASSERT(pip != PipId());
+        if (pip_to_net.find(pip) == pip_to_net.end())
+            return IdString();
+        else
+            return pip_to_net.at(pip);
+    }
+
+    AllPipRange getPips() const
+    {
+        AllPipRange range;
+        range.b.cursor_tile = 0;
+        range.b.cursor_index = -1;
+        range.b.chip = chip_info;
+        ++range.b; //-1 and then ++ deals with the case of no wries in the first tile
+        range.e.cursor_tile = chip_info->width * chip_info->height;
+        range.e.cursor_index = 0;
+        range.e.chip = chip_info;
+        return range;
+    }
+
+    WireId getPipSrcWire(PipId pip) const
+    {
+        WireId wire;
+        NPNR_ASSERT(pip != PipId());
+        wire.index = locInfo(pip)->pip_data[pip.index].src_idx;
+        wire.location = pip.location + locInfo(pip)->pip_data[pip.index].rel_src_loc;
+        return wire;
+    }
+
+    WireId getPipDstWire(PipId pip) const
+    {
+        WireId wire;
+        NPNR_ASSERT(pip != PipId());
+        wire.index = locInfo(pip)->pip_data[pip.index].dst_idx;
+        wire.location = pip.location + locInfo(pip)->pip_data[pip.index].rel_dst_loc;
+        return wire;
+    }
+
+    DelayInfo getPipDelay(PipId pip) const
+    {
+        DelayInfo delay;
+        NPNR_ASSERT(pip != PipId());
+        delay.delay = locInfo(pip)->pip_data[pip.index].delay;
+        return delay;
+    }
+
+    PipRange getPipsDownhill(WireId wire) const
+    {
+        PipRange range;
+        NPNR_ASSERT(wire != WireId());
+        range.b.cursor = locInfo(wire)->wire_data[wire.index].pips_downhill.get();
+        range.b.wire_loc = wire.location;
+        range.e.cursor = range.b.cursor + locInfo(wire)->wire_data[wire.index].num_downhill;
+        range.e.wire_loc = wire.location;
+        return range;
+    }
+
+    PipRange getPipsUphill(WireId wire) const
+    {
+        PipRange range;
+        NPNR_ASSERT(wire != WireId());
+        range.b.cursor = locInfo(wire)->wire_data[wire.index].pips_uphill.get();
+        range.b.wire_loc = wire.location;
+        range.e.cursor = range.b.cursor + locInfo(wire)->wire_data[wire.index].num_uphill;
+        range.e.wire_loc = wire.location;
+        return range;
+    }
+
+    PipRange getWireAliases(WireId wire) const
+    {
+        PipRange range;
+        NPNR_ASSERT(wire != WireId());
+        range.b.cursor = nullptr;
+        range.e.cursor = nullptr;
+        return range;
+    }
+
+    std::string getPipTiletype(PipId pip) const
+    {
+        return chip_info->tiletype_names[locInfo(pip)->pip_data[pip.index].tile_type].get();
+    }
+
+    int8_t getPipType(PipId pip) const { return locInfo(pip)->pip_data[pip.index].pip_type; }
+
+    BelId getPackagePinBel(const std::string &pin) const;
+    std::string getBelPackagePin(BelId bel) const;
+
+    // -------------------------------------------------
+
+    GroupId getGroupByName(IdString name) const { return GroupId(); }
+    IdString getGroupName(GroupId group) const { return IdString(); }
+    std::vector<GroupId> getGroups() const { return std::vector<GroupId>(); }
+    std::vector<BelId> getGroupBels(GroupId group) const { return std::vector<BelId>(); }
+    std::vector<WireId> getGroupWires(GroupId group) const { return std::vector<WireId>(); }
+    std::vector<PipId> getGroupPips(GroupId group) const { return std::vector<PipId>(); }
+    std::vector<GroupId> getGroupGroups(GroupId group) const { return std::vector<GroupId>(); }
+
+    // -------------------------------------------------
+
+    void estimatePosition(BelId bel, int &x, int &y, bool &gb) const;
+    delay_t estimateDelay(WireId src, WireId dst) const;
+    delay_t getDelayEpsilon() const { return 20; }
+    delay_t getRipupDelayPenalty() const { return 200; }
+    float getDelayNS(delay_t v) const { return v * 0.001; }
+    uint32_t getDelayChecksum(delay_t v) const { return v; }
+
+    // -------------------------------------------------
+
+    bool pack();
+    bool place();
+    bool route();
+
+    // -------------------------------------------------
+
+    std::vector<GraphicElement> getDecalGraphics(DecalId decal) const;
+
+    DecalXY getFrameDecal() const;
+    DecalXY getBelDecal(BelId bel) const;
+    DecalXY getWireDecal(WireId wire) const;
+    DecalXY getPipDecal(PipId pip) const;
+    DecalXY getGroupDecal(GroupId group) const;
+
+    // -------------------------------------------------
+
+    // Get the delay through a cell from one port to another, returning false
+    // if no path exists
+    bool getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort, delay_t &delay) const;
+    // Get the associated clock to a port, or empty if the port is combinational
+    IdString getPortClock(const CellInfo *cell, IdString port) const;
+    // Return true if a port is a clock
+    bool isClockPort(const CellInfo *cell, IdString port) const;
+    // Return true if a port is a net
+    bool isGlobalNet(const NetInfo *net) const;
+
+    // -------------------------------------------------
+    // Placement validity checks
+    bool isValidBelForCell(CellInfo *cell, BelId bel) const;
+    bool isBelLocationValid(BelId bel) const;
+};
+
+NEXTPNR_NAMESPACE_END
diff --git a/common/route.h b/ecp5/arch_pybindings.cc
similarity index 83%
rename from common/route.h
rename to ecp5/arch_pybindings.cc
index 1da9edc2..8310c3a1 100644
--- a/common/route.h
+++ b/ecp5/arch_pybindings.cc
@@ -2,6 +2,7 @@
  *  nextpnr -- Next Generation Place and Route
  *
  *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *  Copyright (C) 2018  David Shah <dave@ds0.me>
  *
  *  Permission to use, copy, modify, and/or distribute this software for any
  *  purpose with or without fee is hereby granted, provided that the above
@@ -17,16 +18,15 @@
  *
  */
 
-#ifndef ROUTE_H
-#define ROUTE_H
+#ifndef NO_PYTHON
 
 #include "nextpnr.h"
+#include "pybindings.h"
 
 NEXTPNR_NAMESPACE_BEGIN
 
-extern bool route_design(Context *ctx);
-extern bool get_actual_route_delay(Context *ctx, WireId src_wire, WireId dst_wire, delay_t &delay);
+void arch_wrap_python() {}
 
 NEXTPNR_NAMESPACE_END
 
-#endif // ROUTE_H
+#endif
diff --git a/ecp5/arch_pybindings.h b/ecp5/arch_pybindings.h
new file mode 100644
index 00000000..a5044f29
--- /dev/null
+++ b/ecp5/arch_pybindings.h
@@ -0,0 +1,75 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+#ifndef ARCH_PYBINDINGS_H
+#define ARCH_PYBINDINGS_H
+#ifndef NO_PYTHON
+
+#include "nextpnr.h"
+#include "pybindings.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+namespace PythonConversion {
+
+template <> struct string_converter<BelId>
+{
+    BelId from_str(Context *ctx, std::string name) { return ctx->getBelByName(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, BelId id)
+    {
+        if (id == BelId())
+            throw bad_wrap();
+        return ctx->getBelName(id).str(ctx);
+    }
+};
+
+template <> struct string_converter<BelType>
+{
+    BelType from_str(Context *ctx, std::string name) { return ctx->belTypeFromId(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, BelType typ) { return ctx->belTypeToId(typ).str(ctx); }
+};
+
+template <> struct string_converter<WireId>
+{
+    WireId from_str(Context *ctx, std::string name) { return ctx->getWireByName(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, WireId id) { return ctx->getWireName(id).str(ctx); }
+};
+
+template <> struct string_converter<PipId>
+{
+    PipId from_str(Context *ctx, std::string name) { return ctx->getPipByName(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, PipId id) { return ctx->getPipName(id).str(ctx); }
+};
+
+template <> struct string_converter<PortPin>
+{
+    PortPin from_str(Context *ctx, std::string name) { return ctx->portPinFromId(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, PortPin id) { return ctx->portPinToId(id).str(ctx); }
+};
+
+} // namespace PythonConversion
+
+NEXTPNR_NAMESPACE_END
+#endif
+#endif
diff --git a/ecp5/archdefs.h b/ecp5/archdefs.h
new file mode 100644
index 00000000..84a431fd
--- /dev/null
+++ b/ecp5/archdefs.h
@@ -0,0 +1,202 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef NEXTPNR_H
+#error Include "archdefs.h" via "nextpnr.h" only.
+#endif
+
+#include <boost/functional/hash.hpp>
+
+NEXTPNR_NAMESPACE_BEGIN
+
+typedef int delay_t;
+
+struct DelayInfo
+{
+    delay_t delay = 0;
+
+    delay_t raiseDelay() const { return delay; }
+    delay_t fallDelay() const { return delay; }
+    delay_t avgDelay() const { return delay; }
+
+    DelayInfo operator+(const DelayInfo &other) const
+    {
+        DelayInfo ret;
+        ret.delay = this->delay + other.delay;
+        return ret;
+    }
+};
+
+// -----------------------------------------------------------------------
+
+enum BelType : int32_t
+{
+    TYPE_NONE,
+    TYPE_TRELLIS_SLICE,
+    TYPE_TRELLIS_IO
+};
+
+enum PortPin : int32_t
+{
+    PIN_NONE,
+#define X(t) PIN_##t,
+#include "portpins.inc"
+#undef X
+    PIN_MAXIDX
+};
+
+NPNR_PACKED_STRUCT(struct LocationPOD { int16_t x, y; });
+
+struct Location
+{
+    int16_t x = -1, y = -1;
+    Location() : x(-1), y(-1){};
+    Location(int16_t x, int16_t y) : x(x), y(y){};
+    Location(const LocationPOD &pod) : x(pod.x), y(pod.y){};
+    Location(const Location &loc) : x(loc.x), y(loc.y){};
+
+    bool operator==(const Location &other) const { return x == other.x && y == other.y; }
+    bool operator!=(const Location &other) const { return x != other.x || y != other.y; }
+};
+
+inline Location operator+(const Location &a, const Location &b) { return Location(a.x + b.x, a.y + b.y); }
+
+struct BelId
+{
+    Location location;
+    int32_t index = -1;
+
+    bool operator==(const BelId &other) const { return index == other.index && location == other.location; }
+    bool operator!=(const BelId &other) const { return index != other.index || location != other.location; }
+};
+
+struct WireId
+{
+    Location location;
+    int32_t index = -1;
+
+    bool operator==(const WireId &other) const { return index == other.index && location == other.location; }
+    bool operator!=(const WireId &other) const { return index != other.index || location != other.location; }
+};
+
+struct PipId
+{
+    Location location;
+    int32_t index = -1;
+
+    bool operator==(const PipId &other) const { return index == other.index && location == other.location; }
+    bool operator!=(const PipId &other) const { return index != other.index || location != other.location; }
+};
+
+struct GroupId
+{
+    int32_t index = -1;
+
+    bool operator==(const GroupId &other) const { return index == other.index; }
+    bool operator!=(const GroupId &other) const { return index != other.index; }
+};
+
+struct DecalId
+{
+    char type = 0; // Bel/Wire/Pip/Frame (b/w/p/f)
+    Location location;
+    uint32_t z = 0;
+
+    bool operator==(const DecalId &other) const
+    {
+        return type == other.type && location == other.location && z == other.z;
+    }
+    bool operator!=(const DecalId &other) const
+    {
+        return type != other.type || location != other.location || z != other.z;
+    }
+};
+
+NEXTPNR_NAMESPACE_END
+
+namespace std {
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX Location>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX Location &loc) const noexcept
+    {
+        std::size_t seed = std::hash<int>()(loc.x);
+        seed ^= std::hash<int>()(loc.y) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX BelId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX BelId &bel) const noexcept
+    {
+        std::size_t seed = std::hash<NEXTPNR_NAMESPACE_PREFIX Location>()(bel.location);
+        seed ^= std::hash<int>()(bel.index) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX WireId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX WireId &wire) const noexcept
+    {
+        std::size_t seed = std::hash<NEXTPNR_NAMESPACE_PREFIX Location>()(wire.location);
+        seed ^= std::hash<int>()(wire.index) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX PipId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX PipId &pip) const noexcept
+    {
+        std::size_t seed = std::hash<NEXTPNR_NAMESPACE_PREFIX Location>()(pip.location);
+        seed ^= std::hash<int>()(pip.index) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX GroupId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX GroupId &group) const noexcept
+    {
+        return std::hash<int>()(group.index);
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX DecalId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX DecalId &decal) const noexcept
+    {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, hash<int>()(decal.type));
+        boost::hash_combine(seed, hash<NEXTPNR_NAMESPACE_PREFIX Location>()(decal.location));
+        boost::hash_combine(seed, hash<int>()(decal.z));
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX BelType> : hash<int>
+{
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX PortPin> : hash<int>
+{
+};
+} // namespace std
diff --git a/ecp5/bitstream.cc b/ecp5/bitstream.cc
new file mode 100644
index 00000000..e70d6bb2
--- /dev/null
+++ b/ecp5/bitstream.cc
@@ -0,0 +1,257 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "bitstream.h"
+
+// From Project Trellis
+#include "BitDatabase.hpp"
+#include "Bitstream.hpp"
+#include "Chip.hpp"
+#include "ChipConfig.hpp"
+#include "Tile.hpp"
+#include "TileConfig.hpp"
+
+#include <fstream>
+#include <streambuf>
+
+#include "log.h"
+#include "util.h"
+
+#define fmt_str(x) (static_cast<const std::ostringstream &>(std::ostringstream() << x).str())
+
+NEXTPNR_NAMESPACE_BEGIN
+
+// Convert an absolute wire name to a relative Trellis one
+static std::string get_trellis_wirename(Context *ctx, Location loc, WireId wire)
+{
+    std::string basename = ctx->locInfo(wire)->wire_data[wire.index].name.get();
+    std::string prefix2 = basename.substr(0, 2);
+    if (prefix2 == "G_" || prefix2 == "L_" || prefix2 == "R_")
+        return basename;
+    if (loc == wire.location)
+        return basename;
+    std::string rel_prefix;
+    if (wire.location.y < loc.y)
+        rel_prefix += "N" + to_string(loc.y - wire.location.y);
+    if (wire.location.y > loc.y)
+        rel_prefix += "S" + to_string(wire.location.y - loc.y);
+    if (wire.location.x > loc.x)
+        rel_prefix += "E" + to_string(wire.location.x - loc.x);
+    if (wire.location.x < loc.x)
+        rel_prefix += "W" + to_string(loc.x - wire.location.x);
+    return rel_prefix + "_" + basename;
+}
+
+static std::vector<bool> int_to_bitvector(int val, int size)
+{
+    std::vector<bool> bv;
+    for (int i = 0; i < size; i++) {
+        bv.push_back((val & (1 << i)) != 0);
+    }
+    return bv;
+}
+
+// Get the PIO tile corresponding to a PIO bel
+static std::string get_pio_tile(Context *ctx, Trellis::Chip &chip, BelId bel)
+{
+    static const std::set<std::string> pioabcd_l = {"PICL1", "PICL1_DQS0", "PICL1_DQS3"};
+    static const std::set<std::string> pioabcd_r = {"PICR1", "PICR1_DQS0", "PICR1_DQS3"};
+    static const std::set<std::string> pioa_b = {"PICB0", "EFB0_PICB0", "EFB2_PICB0"};
+    static const std::set<std::string> piob_b = {"PICB1", "EFB1_PICB1", "EFB3_PICB1"};
+
+    std::string pio_name = ctx->locInfo(bel)->bel_data[bel.index].name.get();
+    if (bel.location.y == 0) {
+        if (pio_name == "PIOA") {
+            return chip.get_tile_by_position_and_type(0, bel.location.x, "PIOT0");
+        } else if (pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(0, bel.location.x + 1, "PIOT1");
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.y == ctx->chip_info->height - 1) {
+        if (pio_name == "PIOA") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, pioa_b);
+        } else if (pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x + 1, piob_b);
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.x == 0) {
+        return chip.get_tile_by_position_and_type(bel.location.y + 1, bel.location.x, pioabcd_l);
+    } else if (bel.location.x == ctx->chip_info->width - 1) {
+        return chip.get_tile_by_position_and_type(bel.location.y + 1, bel.location.x, pioabcd_r);
+    } else {
+        NPNR_ASSERT_FALSE("bad PIO location");
+    }
+}
+
+// Get the PIC tile corresponding to a PIO bel
+static std::string get_pic_tile(Context *ctx, Trellis::Chip &chip, BelId bel)
+{
+    static const std::set<std::string> picab_l = {"PICL0", "PICL0_DQS2"};
+    static const std::set<std::string> piccd_l = {"PICL2", "PICL2_DQS1", "MIB_CIB_LR"};
+    static const std::set<std::string> picab_r = {"PICR0", "PICR0_DQS2"};
+    static const std::set<std::string> piccd_r = {"PICR2", "PICR2_DQS1", "MIB_CIB_LR_A"};
+
+    static const std::set<std::string> pica_b = {"PICB0", "EFB0_PICB0", "EFB2_PICB0"};
+    static const std::set<std::string> picb_b = {"PICB1", "EFB1_PICB1", "EFB3_PICB1"};
+
+    std::string pio_name = ctx->locInfo(bel)->bel_data[bel.index].name.get();
+    if (bel.location.y == 0) {
+        if (pio_name == "PIOA") {
+            return chip.get_tile_by_position_and_type(1, bel.location.x, "PICT0");
+        } else if (pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(1, bel.location.x + 1, "PICT1");
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.y == ctx->chip_info->height - 1) {
+        if (pio_name == "PIOA") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, pica_b);
+        } else if (pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x + 1, picb_b);
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.x == 0) {
+        if (pio_name == "PIOA" || pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, picab_l);
+        } else if (pio_name == "PIOC" || pio_name == "PIOD") {
+            return chip.get_tile_by_position_and_type(bel.location.y + 2, bel.location.x, piccd_l);
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.x == ctx->chip_info->width - 1) {
+        if (pio_name == "PIOA" || pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, picab_r);
+        } else if (pio_name == "PIOC" || pio_name == "PIOD") {
+            return chip.get_tile_by_position_and_type(bel.location.y + 2, bel.location.x, piccd_r);
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else {
+        NPNR_ASSERT_FALSE("bad PIO location");
+    }
+}
+
+void write_bitstream(Context *ctx, std::string base_config_file, std::string text_config_file,
+                     std::string bitstream_file)
+{
+    Trellis::Chip empty_chip(ctx->getChipName());
+    Trellis::ChipConfig cc;
+
+    std::set<std::string> cib_tiles = {"CIB", "CIB_LR", "CIB_LR_S", "CIB_EFB0", "CIB_EFB1"};
+
+    if (!base_config_file.empty()) {
+        std::ifstream config_file(base_config_file);
+        if (!config_file) {
+            log_error("failed to open base config file '%s'\n", base_config_file.c_str());
+        }
+        std::string str((std::istreambuf_iterator<char>(config_file)), std::istreambuf_iterator<char>());
+        cc = Trellis::ChipConfig::from_string(str);
+    } else {
+        cc.chip_name = ctx->getChipName();
+        // TODO: .bit metadata
+    }
+
+    // Add all set, configurable pips to the config
+    for (auto pip : ctx->getPips()) {
+        if (ctx->getBoundPipNet(pip) != IdString()) {
+            if (ctx->getPipType(pip) == 0) { // ignore fixed pips
+                std::string tile = empty_chip.get_tile_by_position_and_type(pip.location.y, pip.location.x,
+                                                                            ctx->getPipTiletype(pip));
+                std::string source = get_trellis_wirename(ctx, pip.location, ctx->getPipSrcWire(pip));
+                std::string sink = get_trellis_wirename(ctx, pip.location, ctx->getPipDstWire(pip));
+                cc.tiles[tile].add_arc(sink, source);
+            }
+        }
+    }
+
+    // Set all bankref tiles to 3.3V (TODO)
+    for (const auto &tile : empty_chip.tiles) {
+        std::string type = tile.second->info.type;
+        if (type.find("BANKREF") != std::string::npos && type != "BANKREF8") {
+            cc.tiles[tile.first].add_enum("BANK.VCCIO", "3V3");
+        }
+    }
+
+    // Configure slices
+    for (auto &cell : ctx->cells) {
+        CellInfo *ci = cell.second.get();
+        if (ci->bel == BelId()) {
+            log_warning("found unplaced cell '%s' during bitstream gen\n", ci->name.c_str(ctx));
+        }
+        BelId bel = ci->bel;
+        if (ci->type == ctx->id("TRELLIS_SLICE")) {
+            std::string tname = empty_chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, "PLC2");
+            std::string slice = ctx->locInfo(bel)->bel_data[bel.index].name.get();
+            int lut0_init = int_or_default(ci->params, ctx->id("LUT0_INITVAL"));
+            int lut1_init = int_or_default(ci->params, ctx->id("LUT1_INITVAL"));
+            cc.tiles[tname].add_word(slice + ".K0.INIT", int_to_bitvector(lut0_init, 16));
+            cc.tiles[tname].add_word(slice + ".K1.INIT", int_to_bitvector(lut1_init, 16));
+            cc.tiles[tname].add_enum(slice + ".MODE", str_or_default(ci->params, ctx->id("MODE"), "LOGIC"));
+            cc.tiles[tname].add_enum(slice + ".GSR", str_or_default(ci->params, ctx->id("GSR"), "ENABLED"));
+            cc.tiles[tname].add_enum(slice + ".REG0.SD", str_or_default(ci->params, ctx->id("REG0_SD"), "0"));
+            cc.tiles[tname].add_enum(slice + ".REG1.SD", str_or_default(ci->params, ctx->id("REG1_SD"), "0"));
+            cc.tiles[tname].add_enum(slice + ".REG0.REGSET",
+                                     str_or_default(ci->params, ctx->id("REG0_REGSET"), "RESET"));
+            cc.tiles[tname].add_enum(slice + ".REG1.REGSET",
+                                     str_or_default(ci->params, ctx->id("REG1_REGSET"), "RESET"));
+            cc.tiles[tname].add_enum(slice + ".CEMUX", str_or_default(ci->params, ctx->id("CEMUX"), "1"));
+            // TODO: CLKMUX, CEMUX, carry
+        } else if (ci->type == ctx->id("TRELLIS_IO")) {
+            std::string pio = ctx->locInfo(bel)->bel_data[bel.index].name.get();
+            std::string iotype = str_or_default(ci->attrs, ctx->id("IO_TYPE"), "LVCMOS33");
+            std::string dir = str_or_default(ci->params, ctx->id("DIR"), "INPUT");
+            std::string pio_tile = get_pio_tile(ctx, empty_chip, bel);
+            std::string pic_tile = get_pic_tile(ctx, empty_chip, bel);
+            cc.tiles[pio_tile].add_enum(pio + ".BASE_TYPE", dir + "_" + iotype);
+            cc.tiles[pic_tile].add_enum(pio + ".BASE_TYPE", dir + "_" + iotype);
+            if (dir != "INPUT" &&
+                (ci->ports.find(ctx->id("T")) == ci->ports.end() || ci->ports.at(ctx->id("T")).net == nullptr)) {
+                // Tie tristate low if unconnected for outputs or bidir
+                std::string jpt = fmt_str("X" << bel.location.x << "/Y" << bel.location.y << "/JPADDT" << pio.back());
+                WireId jpt_wire = ctx->getWireByName(ctx->id(jpt));
+                PipId jpt_pip = *ctx->getPipsUphill(jpt_wire).begin();
+                WireId cib_wire = ctx->getPipSrcWire(jpt_pip);
+                std::string cib_tile =
+                        empty_chip.get_tile_by_position_and_type(cib_wire.location.y, cib_wire.location.x, cib_tiles);
+                std::string cib_wirename = ctx->locInfo(cib_wire)->wire_data[cib_wire.index].name.get();
+                cc.tiles[cib_tile].add_enum("CIB." + cib_wirename + "MUX", "0");
+            }
+            if (dir == "INPUT") {
+                cc.tiles[pio_tile].add_enum(pio + ".HYSTERESIS", "ON");
+            }
+        } else {
+            NPNR_ASSERT_FALSE("unsupported cell type");
+        }
+    }
+
+    // Configure chip
+    Trellis::Chip cfg_chip = cc.to_chip();
+    if (!bitstream_file.empty()) {
+        Trellis::Bitstream::serialise_chip(cfg_chip).write_bit_py(bitstream_file);
+    }
+    if (!text_config_file.empty()) {
+        std::ofstream out_config(text_config_file);
+        out_config << cc.to_string();
+    }
+}
+
+NEXTPNR_NAMESPACE_END
diff --git a/ecp5/bitstream.h b/ecp5/bitstream.h
new file mode 100644
index 00000000..62617470
--- /dev/null
+++ b/ecp5/bitstream.h
@@ -0,0 +1,32 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef BITSTREAM_H
+#define BITSTREAM_H
+
+#include "nextpnr.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+void write_bitstream(Context *ctx, std::string base_config_file = "", std::string text_config_file = "",
+                     std::string bitstream_file = "");
+
+NEXTPNR_NAMESPACE_END
+
+#endif // BITSTREAM_H
diff --git a/ecp5/family.cmake b/ecp5/family.cmake
new file mode 100644
index 00000000..f4d0bf87
--- /dev/null
+++ b/ecp5/family.cmake
@@ -0,0 +1,60 @@
+
+set(devices 45k)
+
+if (NOT DEFINED TRELLIS_ROOT)
+    message(FATAL_ERROR "you must define TRELLIS_ROOT using -DTRELLIS_ROOT=/path/to/prjtrellis for ECP5 support")
+endif()
+
+
+file( GLOB found_pytrellis ${TRELLIS_ROOT}/libtrellis/pytrellis.*)
+
+if ("${found_pytrellis}" STREQUAL "")
+    message(FATAL_ERROR "failed to find pytrellis library in ${TRELLIS_ROOT}/libtrellis/")
+endif()
+
+set(DB_PY ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/trellis_import.py)
+
+file(MAKE_DIRECTORY ecp5/chipdbs/)
+add_library(ecp5_chipdb OBJECT ecp5/chipdbs/)
+target_compile_definitions(ecp5_chipdb PRIVATE NEXTPNR_NAMESPACE=nextpnr_${family})
+target_include_directories(ecp5_chipdb PRIVATE ${family}/)
+set(ENV_CMD ${CMAKE_COMMAND} -E env "PYTHONPATH=${TRELLIS_ROOT}/libtrellis:${TRELLIS_ROOT}/util/common")
+if (MSVC)
+    target_sources(ecp5_chipdb PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/resource/embed.cc)
+    set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/ecp5/resources/chipdb.rc PROPERTIES LANGUAGE RC)
+    foreach (dev ${devices})
+        set(DEV_CC_DB ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/chipdbs/chipdb-${dev}.bin)
+        set(DEV_PORTS_INC ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/portpins.inc)
+        add_custom_command(OUTPUT ${DEV_CC_DB}
+                COMMAND ${ENV_CMD} python3 ${DB_PY} -b -p ${DEV_PORTS_INC} ${dev} ${DEV_CC_DB}
+                DEPENDS ${DB_PY}
+                )
+        target_sources(ecp5_chipdb PRIVATE ${DEV_CC_DB})
+        set_source_files_properties(${DEV_CC_DB} PROPERTIES HEADER_FILE_ONLY TRUE)
+        foreach (target ${family_targets})
+            target_sources(${target} PRIVATE $<TARGET_OBJECTS:ecp5_chipdb> ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/resource/chipdb.rc)
+        endforeach (target)
+    endforeach (dev)
+else()
+    target_compile_options(ecp5_chipdb PRIVATE -g0 -O0 -w)
+    foreach (dev ${devices})
+        set(DEV_CC_DB ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/chipdbs/chipdb-${dev}.cc)
+        set(DEV_PORTS_INC ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/portpins.inc)
+        add_custom_command(OUTPUT ${DEV_CC_DB}
+                COMMAND ${ENV_CMD} python3 ${DB_PY} -c -p ${DEV_PORTS_INC} ${dev} ${DEV_CC_DB}
+                DEPENDS ${DB_PY}
+                )
+        target_sources(ecp5_chipdb PRIVATE ${DEV_CC_DB})
+        foreach (target ${family_targets})
+            target_sources(${target} PRIVATE $<TARGET_OBJECTS:ecp5_chipdb>)
+        endforeach (target)
+    endforeach (dev)
+endif()
+
+find_library(TRELLIS_LIB trellis PATHS ${TRELLIS_ROOT}/libtrellis)
+
+foreach (target ${family_targets})
+    target_compile_definitions(${target} PRIVATE TRELLIS_ROOT="${TRELLIS_ROOT}")
+    target_include_directories(${target} PRIVATE ${TRELLIS_ROOT}/libtrellis/include)
+    target_link_libraries(${target} PRIVATE ${TRELLIS_LIB})
+endforeach (target)
diff --git a/ecp5/main.cc b/ecp5/main.cc
new file mode 100644
index 00000000..4cb2f10d
--- /dev/null
+++ b/ecp5/main.cc
@@ -0,0 +1,199 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifdef MAIN_EXECUTABLE
+
+#ifndef NO_GUI
+#include <QApplication>
+#include "application.h"
+#include "mainwindow.h"
+#endif
+#ifndef NO_PYTHON
+#include "pybindings.h"
+#endif
+#include <boost/filesystem/convenience.hpp>
+#include <boost/program_options.hpp>
+#include <fstream>
+#include <iostream>
+
+#include "Chip.hpp"
+#include "Database.hpp"
+#include "Tile.hpp"
+
+#include "log.h"
+#include "nextpnr.h"
+#include "version.h"
+
+#include "bitstream.h"
+#include "design_utils.h"
+#include "jsonparse.h"
+#include "timing.h"
+
+USING_NEXTPNR_NAMESPACE
+
+int main(int argc, char *argv[])
+{
+    try {
+
+        namespace po = boost::program_options;
+        int rc = 0;
+
+        log_files.push_back(stdout);
+
+        po::options_description options("Allowed options");
+        options.add_options()("help,h", "show help");
+        options.add_options()("verbose,v", "verbose output");
+        options.add_options()("force,f", "keep running after errors");
+#ifndef NO_GUI
+        options.add_options()("gui", "start gui");
+#endif
+        options.add_options()("json", po::value<std::string>(), "JSON design file to ingest");
+        options.add_options()("seed", po::value<int>(), "seed value for random number generator");
+
+        options.add_options()("basecfg", po::value<std::string>(), "base chip configuration in Trellis text format");
+        options.add_options()("bit", po::value<std::string>(), "bitstream file to write");
+        options.add_options()("textcfg", po::value<std::string>(), "textual configuration in Trellis format to write");
+
+        po::positional_options_description pos;
+#ifndef NO_PYTHON
+        options.add_options()("run", po::value<std::vector<std::string>>(), "python file to execute");
+        pos.add("run", -1);
+#endif
+        options.add_options()("version,V", "show version");
+
+        po::variables_map vm;
+        try {
+            po::parsed_options parsed = po::command_line_parser(argc, argv).options(options).positional(pos).run();
+
+            po::store(parsed, vm);
+
+            po::notify(vm);
+        }
+
+        catch (std::exception &e) {
+            std::cout << e.what() << "\n";
+            return 1;
+        }
+
+        if (vm.count("help") || argc == 1) {
+            std::cout << boost::filesystem::basename(argv[0])
+                      << " -- Next Generation Place and Route (git "
+                         "sha1 " GIT_COMMIT_HASH_STR ")\n";
+            std::cout << "\n";
+            std::cout << options << "\n";
+            return argc != 1;
+        }
+
+        if (vm.count("version")) {
+            std::cout << boost::filesystem::basename(argv[0])
+                      << " -- Next Generation Place and Route (git "
+                         "sha1 " GIT_COMMIT_HASH_STR ")\n";
+            return 1;
+        }
+
+        Trellis::load_database(TRELLIS_ROOT "/database");
+
+        ArchArgs args;
+        args.type = ArchArgs::LFE5U_45F;
+        args.package = "CABGA381";
+        args.speed = 6;
+        std::unique_ptr<Context> ctx = std::unique_ptr<Context>(new Context(args));
+
+        if (vm.count("verbose")) {
+            ctx->verbose = true;
+        }
+
+        if (vm.count("force")) {
+            ctx->force = true;
+        }
+
+        if (vm.count("seed")) {
+            ctx->rngseed(vm["seed"].as<int>());
+        }
+
+        ctx->timing_driven = true;
+        if (vm.count("no-tmdriv"))
+            ctx->timing_driven = false;
+
+#ifndef NO_GUI
+        if (vm.count("gui")) {
+            Application a(argc, argv);
+            MainWindow w(std::move(ctx));
+            w.show();
+
+            return a.exec();
+        }
+#endif
+        if (vm.count("json")) {
+            std::string filename = vm["json"].as<std::string>();
+            std::ifstream f(filename);
+            if (!parse_json_file(f, filename, ctx.get()))
+                log_error("Loading design failed.\n");
+
+            if (!ctx->pack() && !ctx->force)
+                log_error("Packing design failed.\n");
+            if (vm.count("freq"))
+                ctx->target_freq = vm["freq"].as<double>() * 1e6;
+            assign_budget(ctx.get());
+            ctx->check();
+            print_utilisation(ctx.get());
+
+            if (!ctx->place() && !ctx->force)
+                log_error("Placing design failed.\n");
+            ctx->check();
+            if (!ctx->route() && !ctx->force)
+                log_error("Routing design failed.\n");
+
+            std::string basecfg;
+            if (vm.count("basecfg"))
+                basecfg = vm["basecfg"].as<std::string>();
+
+            std::string bitstream;
+            if (vm.count("bit"))
+                bitstream = vm["bit"].as<std::string>();
+
+            std::string textcfg;
+            if (vm.count("textcfg"))
+                textcfg = vm["textcfg"].as<std::string>();
+            write_bitstream(ctx.get(), basecfg, textcfg, bitstream);
+        }
+
+#ifndef NO_PYTHON
+        if (vm.count("run")) {
+            init_python(argv[0], true);
+            python_export_global("ctx", ctx);
+
+            std::vector<std::string> files = vm["run"].as<std::vector<std::string>>();
+            for (auto filename : files)
+                execute_python_file(filename.c_str());
+
+            deinit_python();
+        }
+#endif
+        return rc;
+    } catch (log_execution_error_exception) {
+#if defined(_MSC_VER)
+        _exit(EXIT_FAILURE);
+#else
+        _Exit(EXIT_FAILURE);
+#endif
+    }
+}
+
+#endif
diff --git a/ecp5/pack.cc b/ecp5/pack.cc
new file mode 100644
index 00000000..e3ddc07d
--- /dev/null
+++ b/ecp5/pack.cc
@@ -0,0 +1,99 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include <algorithm>
+#include <iterator>
+#include <unordered_set>
+#include "design_utils.h"
+#include "log.h"
+#include "util.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+static bool is_nextpnr_iob(Context *ctx, CellInfo *cell)
+{
+    return cell->type == ctx->id("$nextpnr_ibuf") || cell->type == ctx->id("$nextpnr_obuf") ||
+           cell->type == ctx->id("$nextpnr_iobuf");
+}
+
+static bool is_trellis_io(const Context *ctx, const CellInfo *cell) { return cell->type == ctx->id("TRELLIS_IO"); }
+
+// Simple "packer" to remove nextpnr IOBUFs, this assumes IOBUFs are manually instantiated
+void pack_io(Context *ctx)
+{
+    std::unordered_set<IdString> packed_cells;
+    std::vector<std::unique_ptr<CellInfo>> new_cells;
+    log_info("Packing IOs..\n");
+
+    for (auto cell : sorted(ctx->cells)) {
+        CellInfo *ci = cell.second;
+        if (is_nextpnr_iob(ctx, ci)) {
+            CellInfo *trio = nullptr;
+            if (ci->type == ctx->id("$nextpnr_ibuf") || ci->type == ctx->id("$nextpnr_iobuf")) {
+                trio = net_only_drives(ctx, ci->ports.at(ctx->id("O")).net, is_trellis_io, ctx->id("B"), true, ci);
+
+            } else if (ci->type == ctx->id("$nextpnr_obuf")) {
+                trio = net_only_drives(ctx, ci->ports.at(ctx->id("I")).net, is_trellis_io, ctx->id("B"), true, ci);
+            }
+            if (trio != nullptr) {
+                // Trivial case, TRELLIS_IO used. Just destroy the net and the
+                // iobuf
+                log_info("%s feeds TRELLIS_IO %s, removing %s %s.\n", ci->name.c_str(ctx), trio->name.c_str(ctx),
+                         ci->type.c_str(ctx), ci->name.c_str(ctx));
+                NetInfo *net = trio->ports.at(ctx->id("B")).net;
+                if (net != nullptr) {
+                    ctx->nets.erase(net->name);
+                    trio->ports.at(ctx->id("B")).net = nullptr;
+                }
+                if (ci->type == ctx->id("$nextpnr_iobuf")) {
+                    NetInfo *net2 = ci->ports.at(ctx->id("I")).net;
+                    if (net2 != nullptr) {
+                        ctx->nets.erase(net2->name);
+                    }
+                }
+            } else {
+                log_error("TRELLIS_IO required on all top level IOs...\n");
+            }
+            packed_cells.insert(ci->name);
+            std::copy(ci->attrs.begin(), ci->attrs.end(), std::inserter(trio->attrs, trio->attrs.begin()));
+        }
+    }
+    for (auto pcell : packed_cells) {
+        ctx->cells.erase(pcell);
+    }
+    for (auto &ncell : new_cells) {
+        ctx->cells[ncell->name] = std::move(ncell);
+    }
+}
+
+// Main pack function
+bool Arch::pack()
+{
+    Context *ctx = getCtx();
+    try {
+        log_break();
+        pack_io(ctx);
+        log_info("Checksum: 0x%08x\n", ctx->checksum());
+        return true;
+    } catch (log_execution_error_exception) {
+        return false;
+    }
+}
+
+NEXTPNR_NAMESPACE_END
diff --git a/ecp5/place_legaliser.cc b/ecp5/place_legaliser.cc
new file mode 100644
index 00000000..0d23f15b
--- /dev/null
+++ b/ecp5/place_legaliser.cc
@@ -0,0 +1,26 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "place_legaliser.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+bool legalise_design(Context *ctx) { return true; }
+
+NEXTPNR_NAMESPACE_END
diff --git a/ecp5/place_legaliser.h b/ecp5/place_legaliser.h
new file mode 100644
index 00000000..5f4df6aa
--- /dev/null
+++ b/ecp5/place_legaliser.h
@@ -0,0 +1,31 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef PLACE_LEGALISER_H
+#define PLACE_LEGALISER_H
+
+#include "nextpnr.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+bool legalise_design(Context *ctx);
+
+NEXTPNR_NAMESPACE_END
+
+#endif
diff --git a/ecp5/portpins.inc b/ecp5/portpins.inc
new file mode 100644
index 00000000..ab0ebe9f
--- /dev/null
+++ b/ecp5/portpins.inc
@@ -0,0 +1,46 @@
+X(A0)
+X(B0)
+X(C0)
+X(D0)
+X(A1)
+X(B1)
+X(C1)
+X(D1)
+X(M0)
+X(M1)
+X(FCI)
+X(FXA)
+X(FXB)
+X(CLK)
+X(LSR)
+X(CE)
+X(DI0)
+X(DI1)
+X(WD0)
+X(WD1)
+X(WAD0)
+X(WAD1)
+X(WAD2)
+X(WAD3)
+X(WRE)
+X(WCK)
+X(F0)
+X(Q0)
+X(F1)
+X(Q1)
+X(FCO)
+X(OFX0)
+X(OFX1)
+X(WDO0)
+X(WDO1)
+X(WDO2)
+X(WDO3)
+X(WADO0)
+X(WADO1)
+X(WADO2)
+X(WADO3)
+
+X(I)
+X(O)
+X(T)
+X(B)
diff --git a/ecp5/synth/.gitignore b/ecp5/synth/.gitignore
new file mode 100644
index 00000000..5b3bf578
--- /dev/null
+++ b/ecp5/synth/.gitignore
@@ -0,0 +1 @@
+*.bit
diff --git a/ecp5/synth/blinky.v b/ecp5/synth/blinky.v
new file mode 100644
index 00000000..ac7c6ea3
--- /dev/null
+++ b/ecp5/synth/blinky.v
@@ -0,0 +1,77 @@
+module top(input clk_pin, input btn_pin, output [3:0] led_pin, output gpio0_pin);
+
+	wire clk;
+	wire [7:0] led;
+    wire btn;
+    wire gpio0;
+
+	(* BEL="X0/Y35/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("INPUT")) clk_buf (.B(clk_pin), .O(clk));
+
+	(* BEL="X4/Y71/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("INPUT")) btn_buf (.B(btn_pin), .O(btn));
+
+	(* BEL="X0/Y23/PIOC" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_0 (.B(led_pin[0]), .I(led[0]));
+	(* BEL="X0/Y23/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_1 (.B(led_pin[1]), .I(led[1]));
+	(* BEL="X0/Y26/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_2 (.B(led_pin[2]), .I(led[2]));
+    (* BEL="X0/Y26/PIOC" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_3 (.B(led_pin[3]), .I(led[3]));
+
+	(* BEL="X0/Y26/PIOB" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_4 (.B(led_pin[4]), .I(led[4]));
+	(* BEL="X0/Y32/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_5 (.B(led_pin[5]), .I(led[5]));
+	(* BEL="X0/Y26/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_6 (.B(led_pin[6]), .I(led[6]));
+    (* BEL="X0/Y29/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_7 (.B(led_pin[7]), .I(led[7]));
+
+
+	(* BEL="X0/Y62/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) gpio0_buf (.B(gpio0_pin), .I(gpio0));
+
+    localparam ctr_width = 24;
+    localparam ctr_max = 2**ctr_width - 1;
+	reg [ctr_width-1:0] ctr = 0;
+	reg [9:0] pwm_ctr = 0;
+    reg dir = 0;
+
+	always@(posedge clk) begin
+		ctr <= btn ? ctr : (dir ? ctr - 1'b1 : ctr + 1'b1);
+        if (ctr[ctr_width-1 : ctr_width-3] == 0 && dir == 1)
+            dir <= 1'b0;
+        else if (ctr[ctr_width-1 : ctr_width-3] == 7 && dir == 0)
+            dir <= 1'b1;
+        pwm_ctr <= pwm_ctr + 1'b1;
+    end
+
+    reg [9:0] brightness [0:7];
+    localparam bright_max = 2**10 - 1;
+    reg [7:0] led_reg;
+
+    genvar i;
+    generate
+    for (i = 0; i < 8; i=i+1) begin
+       always @ (posedge clk) begin
+            if (ctr[ctr_width-1 : ctr_width-3] == i)
+                brightness[i] <= bright_max;
+            else if (ctr[ctr_width-1 : ctr_width-3] == (i - 1))
+                brightness[i] <= ctr[ctr_width-4:ctr_width-13];
+             else if (ctr[ctr_width-1 : ctr_width-3] == (i + 1))
+                 brightness[i] <= bright_max - ctr[ctr_width-4:ctr_width-13];
+            else
+                brightness[i] <= 0;
+            led_reg[i] <= pwm_ctr < brightness[i];
+       end
+    end
+    endgenerate
+
+    assign led = led_reg;
+
+    // Tie GPIO0, keep board from rebooting
+    TRELLIS_SLICE #(.MODE("LOGIC"), .LUT0_INITVAL(16'hFFFF)) vcc (.F0(gpio0));
+
+endmodule
diff --git a/ecp5/synth/blinky.ys b/ecp5/synth/blinky.ys
new file mode 100644
index 00000000..c0b74636
--- /dev/null
+++ b/ecp5/synth/blinky.ys
@@ -0,0 +1,9 @@
+read_verilog blinky.v
+read_verilog -lib cells.v
+synth -top top
+abc -lut 4
+techmap -map simple_map.v
+splitnets
+opt_clean
+stat
+write_json blinky.json
diff --git a/ecp5/synth/cells.v b/ecp5/synth/cells.v
new file mode 100644
index 00000000..353b8ada
--- /dev/null
+++ b/ecp5/synth/cells.v
@@ -0,0 +1,49 @@
+(* blackbox *)
+module TRELLIS_SLICE(
+	input A0, B0, C0, D0,
+	input A1, B1, C1, D1,
+	input M0, M1,
+	input FCI, FXA, FXB,
+
+	input CLK, LSR, CE,
+	input DI0, DI1,
+
+	input WD0, WD1,
+	input WAD0, WAD1, WAD2, WAD3,
+	input WRE, WCK,
+
+	output F0, Q0,
+	output F1, Q1,
+	output FCO, OFX0, OFX1,
+
+    output WDO0, WDO1, WDO2, WDO3,
+    output WADO0, WADO1, WADO2, WADO3
+);
+
+parameter MODE = "LOGIC";
+parameter GSR = "ENABLED";
+parameter SRMODE = "LSR_OVER_CE";
+parameter CEMUX = "1";
+parameter CLKMUX = "CLK";
+parameter LSRMUX = "LSR";
+parameter LUT0_INITVAL = 16'h0000;
+parameter LUT1_INITVAL = 16'h0000;
+parameter REG0_SD = "0";
+parameter REG1_SD = "0";
+parameter REG0_REGSET = "RESET";
+parameter REG1_REGSET = "RESET";
+parameter CCU2_INJECT1_0 = "NO";
+parameter CCU2_INJECT1_1 = "NO";
+
+endmodule
+
+(* blackbox *) (* keep *)
+module TRELLIS_IO(
+	inout B,
+	input I,
+	input T,
+	output O,
+);
+parameter DIR = "INPUT";
+
+endmodule
diff --git a/ecp5/synth/simple_map.v b/ecp5/synth/simple_map.v
new file mode 100644
index 00000000..550fa92c
--- /dev/null
+++ b/ecp5/synth/simple_map.v
@@ -0,0 +1,68 @@
+module \$_DFF_P_ (input D, C, output Q);
+	TRELLIS_SLICE #(
+		.MODE("LOGIC"),
+		.CLKMUX("CLK"),
+		.CEMUX("1"),
+		.REG0_SD("0"),
+		.REG0_REGSET("RESET"),
+		.SRMODE("LSR_OVER_CE"),
+		.GSR("DISABLED")
+	) _TECHMAP_REPLACE_ (
+		.CLK(C),
+		.M0(D),
+		.Q0(Q)
+	);
+endmodule
+
+module \$lut (A, Y);
+	parameter WIDTH = 0;
+	parameter LUT = 0;
+
+	input [WIDTH-1:0] A;
+	output Y;
+
+	generate
+		if (WIDTH == 1) begin
+			TRELLIS_SLICE #(
+				.MODE("LOGIC"),
+				.LUT0_INITVAL({8{LUT[1:0]}})
+			) _TECHMAP_REPLACE_ (
+				.A0(A[0]),
+				.F0(Y)
+			);
+		end
+		if (WIDTH == 2) begin
+			TRELLIS_SLICE #(
+				.MODE("LOGIC"),
+				.LUT0_INITVAL({4{LUT[3:0]}})
+			) _TECHMAP_REPLACE_ (
+				.A0(A[0]),
+				.B0(A[1]),
+				.F0(Y)
+			);
+		end
+		if (WIDTH == 3) begin
+			TRELLIS_SLICE #(
+				.MODE("LOGIC"),
+				.LUT0_INITVAL({2{LUT[7:0]}})
+			) _TECHMAP_REPLACE_ (
+				.A0(A[0]),
+				.B0(A[1]),
+				.C0(A[2]),
+				.F0(Y)
+			);
+		end
+		if (WIDTH == 4) begin
+			TRELLIS_SLICE #(
+				.MODE("LOGIC"),
+				.LUT0_INITVAL(LUT)
+			) _TECHMAP_REPLACE_ (
+				.A0(A[0]),
+				.B0(A[1]),
+				.C0(A[2]),
+				.D0(A[3]),
+				.F0(Y)
+			);
+		end
+	endgenerate
+endmodule
diff --git a/ecp5/synth/ulx3s.v b/ecp5/synth/ulx3s.v
new file mode 100644
index 00000000..08f6e65b
--- /dev/null
+++ b/ecp5/synth/ulx3s.v
@@ -0,0 +1,18 @@
+module top(input a_pin, output led_pin, output led2_pin, output gpio0_pin);
+
+	wire a;
+	wire led, led2;
+    wire gpio0;
+	(* BEL="X4/Y71/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("INPUT")) a_buf (.B(a_pin), .O(a));
+	(* BEL="X0/Y23/PIOC" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf (.B(led_pin), .I(led));
+    (* BEL="X0/Y26/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+    TRELLIS_IO #(.DIR("OUTPUT")) led2_buf (.B(led2_pin), .I(led2));
+	(* BEL="X0/Y62/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) gpio0_buf (.B(gpio0_pin), .I(gpio0));
+    assign led = a;
+    assign led2 = !a;
+
+    TRELLIS_SLICE #(.MODE("LOGIC"), .LUT0_INITVAL(16'hFFFF)) vcc (.F0(gpio0));
+endmodule
diff --git a/ecp5/synth/ulx3s.ys b/ecp5/synth/ulx3s.ys
new file mode 100644
index 00000000..d741c985
--- /dev/null
+++ b/ecp5/synth/ulx3s.ys
@@ -0,0 +1,9 @@
+read_verilog ulx3s.v
+read_verilog -lib cells.v
+synth -top top
+abc -lut 4
+techmap -map simple_map.v
+splitnets
+opt_clean
+stat
+write_json ulx3s.json
diff --git a/ecp5/synth/ulx3s_empty.config b/ecp5/synth/ulx3s_empty.config
new file mode 100644
index 00000000..815e7f0d
--- /dev/null
+++ b/ecp5/synth/ulx3s_empty.config
@@ -0,0 +1,439 @@
+.device LFE5U-45F
+
+.tile CIB_R10C3:PVT_COUNT2
+unknown: F2B0
+unknown: F3B0
+unknown: F5B0
+unknown: F11B0
+unknown: F13B0
+
+.tile CIB_R5C1:CIB_PLL1
+enum: CIB.JA3MUX 0
+enum: CIB.JB3MUX 0
+
+
+.tile CIB_R5C89:CIB_PLL1
+enum: CIB.JA3MUX 0
+enum: CIB.JB3MUX 0
+
+
+.tile CIB_R70C3:CIB_PLL3
+enum: CIB.JA3MUX 0
+enum: CIB.JB3MUX 0
+
+
+.tile CIB_R70C42:VCIB_DCU0
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C43:VCIB_DCUA
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C44:VCIB_DCUB
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C45:VCIB_DCUC
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C46:VCIB_DCUD
+enum: CIB.JA1MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C47:VCIB_DCUF
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C48:VCIB_DCU3
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C49:VCIB_DCU2
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C50:VCIB_DCUG
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C51:VCIB_DCUH
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C52:VCIB_DCUI
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C53:VCIB_DCU1
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+
+
+.tile CIB_R70C69:VCIB_DCU0
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C6:CIB_EFB0
+enum: CIB.JB3MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C70:VCIB_DCUA
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C71:VCIB_DCUB
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C72:VCIB_DCUC
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C73:VCIB_DCUD
+enum: CIB.JA1MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C74:VCIB_DCUF
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C75:VCIB_DCU3
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C76:VCIB_DCU2
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C77:VCIB_DCUG
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C78:VCIB_DCUH
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C79:VCIB_DCUI
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C7:CIB_EFB1
+enum: CIB.JA3MUX 0
+enum: CIB.JA4MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA6MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB4MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB6MUX 0
+enum: CIB.JC3MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC5MUX 0
+enum: CIB.JD3MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD5MUX 0
+
+
+.tile CIB_R70C80:VCIB_DCU1
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+
+
+.tile CIB_R70C87:CIB_PLL3
+enum: CIB.JA3MUX 0
+enum: CIB.JB3MUX 0
+
+
+.tile MIB_R10C40:CMUX_UL_0
+arc: G_DCS0CLK0 G_VPFN0000
+
+
+.tile MIB_R10C41:CMUX_UR_0
+arc: G_DCS0CLK1 G_VPFN0000
+
+
+.tile MIB_R58C40:CMUX_LL_0
+arc: G_DCS1CLK0 G_VPFN0000
+
+
+.tile MIB_R58C41:CMUX_LR_0
+arc: G_DCS1CLK1 G_VPFN0000
+
+
+.tile MIB_R71C4:EFB0_PICB0
+unknown: F54B1
+unknown: F56B1
+unknown: F82B1
+unknown: F94B1
+
+.tile MIB_R71C3:BANKREF8
+unknown: F18B0
+
diff --git a/ecp5/synth/wire.v b/ecp5/synth/wire.v
new file mode 100644
index 00000000..2af68ed2
--- /dev/null
+++ b/ecp5/synth/wire.v
@@ -0,0 +1,11 @@
+module top(input a_pin, output [3:0] led_pin);
+
+	wire a;
+	wire [3:0] led;
+
+	TRELLIS_IO #(.DIR("INPUT")) a_buf (.B(a_pin), .O(a));
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf [3:0] (.B(led_pin), .I(led));
+
+    //assign led[0] = !a;
+    always @(posedge a) led[0] <= !led[0];
+endmodule
diff --git a/ecp5/synth/wire.ys b/ecp5/synth/wire.ys
new file mode 100644
index 00000000..f916588b
--- /dev/null
+++ b/ecp5/synth/wire.ys
@@ -0,0 +1,9 @@
+read_verilog wire.v
+read_verilog -lib cells.v
+synth -top top
+abc -lut 4
+techmap -map simple_map.v
+splitnets
+opt_clean
+stat
+write_json wire.json
diff --git a/ecp5/trellis_import.py b/ecp5/trellis_import.py
new file mode 100755
index 00000000..5eca057a
--- /dev/null
+++ b/ecp5/trellis_import.py
@@ -0,0 +1,701 @@
+#!/usr/bin/env python3
+import pytrellis
+import database
+import argparse
+
+location_types = dict()
+type_at_location = dict()
+tiletype_names = dict()
+
+parser = argparse.ArgumentParser(description="import ECP5 routing and bels from Project Trellis")
+group = parser.add_mutually_exclusive_group()
+group.add_argument("-b", "--binary", action="store_true")
+group.add_argument("-c", "--c_file", action="store_true")
+parser.add_argument("device", type=str, help="target device")
+parser.add_argument("outfile", type=argparse.FileType('w'), help="output filename")
+parser.add_argument("-p", "--portspins", type=str, help="path to portpins.inc")
+args = parser.parse_args()
+
+
+def is_global(loc):
+    return loc.x == -2 and loc.y == -2
+
+
+# Get the index for a tiletype
+def get_tiletype_index(name):
+    if name in tiletype_names:
+        return tiletype_names[name]
+    idx = len(tiletype_names)
+    tiletype_names[name] = idx
+    return idx
+
+
+portpins = dict()
+
+loc_wire_indices = dict()
+loc_wires = dict()
+
+loc_bels = dict()
+wire_bel_pins_uphill = dict()
+wire_bel_pins_downhill = dict()
+
+
+# Import all wire names at all locations
+def import_location_wires(rg, x, y):
+    loc_wire_indices[x, y] = dict()
+    loc_wires[x, y] = list()
+    wire_bel_pins_uphill[x, y] = list()
+    wire_bel_pins_downhill[x, y] = list()
+    rtile = rg.tiles[pytrellis.Location(x, y)]
+    for wire in rtile.wires:
+        name = rg.to_str(wire.key())
+        idx = len(loc_wires[x, y])
+        loc_wires[x, y].append(name)
+        loc_wire_indices[x, y][name] = idx
+        wire_bel_pins_uphill[x, y].append([])
+        wire_bel_pins_downhill[x, y].append([])
+
+
+# Take a RoutingId from Trellis and make into a (relx, rely, name) tuple
+def resolve_wirename(rg, rid, cur_x, cur_y):
+    if is_global(rid.loc):
+        return (cur_x, cur_y, rg.to_str(rid.id))
+    else:
+        x = rid.loc.x
+        y = rid.loc.y
+        widx = loc_wire_indices[x, y][rg.to_str(rid.id)]
+        return (x - cur_x, y - cur_y, widx)
+
+
+loc_arc_indices = dict()  # Map RoutingId index to nextpnr index
+loc_arcs = dict()
+
+
+# Import all arc indices at a location
+def index_location_arcs(rg, x, y):
+    loc_arc_indices[x, y] = dict()
+    loc_arcs[x, y] = list()
+    rtile = rg.tiles[pytrellis.Location(x, y)]
+    for arc in rtile.arcs:
+        idx = len(loc_arcs[x, y])
+        trid = arc.key()
+        loc_arcs[x, y].append(trid)
+        loc_arc_indices[x, y][trid] = idx
+
+
+def add_bel_input(bel_x, bel_y, bel_idx, bel_pin, wire_x, wire_y, wire_name):
+    bel_pin = portpins[bel_pin]
+    loc_bels[bel_x, bel_y][bel_idx][2].append((bel_pin, (wire_x, wire_y, loc_wire_indices[wire_x, wire_y][wire_name])))
+    wire_bel_pins_downhill[wire_x, wire_y][loc_wire_indices[wire_x, wire_y][wire_name]].append((
+        (bel_x, bel_y, bel_idx), bel_pin))
+
+
+def add_bel_output(bel_x, bel_y, bel_idx, bel_pin, wire_x, wire_y, wire_name):
+    bel_pin = portpins[bel_pin]
+    loc_bels[bel_x, bel_y][bel_idx][2].append((bel_pin, (wire_x, wire_y, loc_wire_indices[wire_x, wire_y][wire_name])))
+    wire_bel_pins_uphill[wire_x, wire_y][loc_wire_indices[wire_x, wire_y][wire_name]].append((
+        (bel_x, bel_y, bel_idx), bel_pin))
+
+
+def add_slice(x, y, z):
+    idx = len(loc_bels[x, y])
+    l = ("A", "B", "C", "D")[z]
+    name = "SLICE" + l
+    loc_bels[x, y].append((name, "SLICE", []))
+    lc0 = z * 2
+    lc1 = z * 2 + 1
+    add_bel_input(x, y, idx, "A0", x, y, "A{}_SLICE".format(lc0))
+    add_bel_input(x, y, idx, "B0", x, y, "B{}_SLICE".format(lc0))
+    add_bel_input(x, y, idx, "C0", x, y, "C{}_SLICE".format(lc0))
+    add_bel_input(x, y, idx, "D0", x, y, "D{}_SLICE".format(lc0))
+    add_bel_input(x, y, idx, "M0", x, y, "M{}_SLICE".format(lc0))
+
+    add_bel_input(x, y, idx, "A1", x, y, "A{}_SLICE".format(lc1))
+    add_bel_input(x, y, idx, "B1", x, y, "B{}_SLICE".format(lc1))
+    add_bel_input(x, y, idx, "C1", x, y, "C{}_SLICE".format(lc1))
+    add_bel_input(x, y, idx, "D1", x, y, "D{}_SLICE".format(lc1))
+    add_bel_input(x, y, idx, "M1", x, y, "M{}_SLICE".format(lc1))
+
+    add_bel_input(x, y, idx, "FCI", x, y, "FCI{}_SLICE".format(l if z > 0 else ""))
+    add_bel_input(x, y, idx, "FXA", x, y, "FXA{}_SLICE".format(l))
+    add_bel_input(x, y, idx, "FXB", x, y, "FXB{}_SLICE".format(l))
+
+    add_bel_input(x, y, idx, "CLK", x, y, "CLK{}_SLICE".format(z))
+    add_bel_input(x, y, idx, "LSR", x, y, "LSR{}_SLICE".format(z))
+    add_bel_input(x, y, idx, "CE", x, y, "CE{}_SLICE".format(z))
+
+    add_bel_input(x, y, idx, "DI0", x, y, "DI{}_SLICE".format(lc0))
+    add_bel_input(x, y, idx, "DI1", x, y, "DI{}_SLICE".format(lc1))
+
+    if z == 0 or z == 1:
+        add_bel_input(x, y, idx, "WD0", x, y, "WD0{}_SLICE".format(l))
+        add_bel_input(x, y, idx, "WD1", x, y, "WD1{}_SLICE".format(l))
+
+        add_bel_input(x, y, idx, "WAD0", x, y, "WAD0{}_SLICE".format(l))
+        add_bel_input(x, y, idx, "WAD1", x, y, "WAD1{}_SLICE".format(l))
+        add_bel_input(x, y, idx, "WAD2", x, y, "WAD2{}_SLICE".format(l))
+        add_bel_input(x, y, idx, "WAD3", x, y, "WAD3{}_SLICE".format(l))
+
+        add_bel_input(x, y, idx, "WRE", x, y, "WRE{}_SLICE".format(z))
+        add_bel_input(x, y, idx, "WCK", x, y, "WCK{}_SLICE".format(z))
+
+    add_bel_output(x, y, idx, "F0", x, y, "F{}_SLICE".format(lc0))
+    add_bel_output(x, y, idx, "Q0", x, y, "Q{}_SLICE".format(lc0))
+
+    add_bel_output(x, y, idx, "F1", x, y, "F{}_SLICE".format(lc1))
+    add_bel_output(x, y, idx, "Q1", x, y, "Q{}_SLICE".format(lc1))
+
+    add_bel_output(x, y, idx, "OFX0", x, y, "F5{}_SLICE".format(l))
+    add_bel_output(x, y, idx, "OFX1", x, y, "FX{}_SLICE".format(l))
+
+    add_bel_output(x, y, idx, "FCO", x, y, "FCO{}_SLICE".format(l if z < 3 else ""))
+
+    if z == 2:
+        add_bel_output(x, y, idx, "WDO0", x, y, "WDO0C_SLICE")
+        add_bel_output(x, y, idx, "WDO1", x, y, "WDO1C_SLICE")
+        add_bel_output(x, y, idx, "WDO2", x, y, "WDO2C_SLICE")
+        add_bel_output(x, y, idx, "WDO3", x, y, "WDO3C_SLICE")
+
+        add_bel_output(x, y, idx, "WADO0", x, y, "WADO0C_SLICE")
+        add_bel_output(x, y, idx, "WADO1", x, y, "WADO1C_SLICE")
+        add_bel_output(x, y, idx, "WADO2", x, y, "WADO2C_SLICE")
+        add_bel_output(x, y, idx, "WADO3", x, y, "WADO3C_SLICE")
+
+
+def add_pio(x, y, z):
+    idx = len(loc_bels[x, y])
+    l = ("A", "B", "C", "D")[z]
+    name = "PIO" + l
+    loc_bels[x, y].append((name, "PIO", []))
+    add_bel_input(x, y, idx, "I", x, y, "PADDO{}_PIO".format(l))
+    add_bel_input(x, y, idx, "T", x, y, "PADDT{}_PIO".format(l))
+    add_bel_output(x, y, idx, "O", x, y, "JPADDI{}_PIO".format(l))
+
+
+def add_bels(chip, x, y):
+    loc_bels[x, y] = []
+    tiles = chip.get_tiles_by_position(y, x)
+    num_slices = 0
+    num_pios = 0
+    for tile in tiles:
+        tt = tile.info.type
+        if tt == "PLC2":
+            num_slices = 4
+        elif "PICL0" in tt or "PICR0" in tt:
+            num_pios = 4
+        elif "PIOT0" in tt or ("PICB0" in tt and "SPICB" not in tt):
+            num_pios = 2
+    for i in range(num_slices):
+        add_slice(x, y, i)
+    for i in range(num_pios):
+        add_pio(x, y, i)
+
+
+# Import a location, deduplicating if appropriate
+def import_location(rg, x, y):
+    rtile = rg.tiles[pytrellis.Location(x, y)]
+    arcs = []  # (src, dst, configurable, tiletype)
+    wires = []  # (name, uphill, downhill, belpin_uphill, belpins_downhill)
+    bels = []  # (name, [(pin, wire)])
+    for name in loc_wires[x, y]:
+        w = rtile.wires[rg.ident(name)]
+        arcs_uphill = []
+        arcs_downhill = []
+        belpins_uphill = []
+        belpins_downhill = []
+        for uh in w.uphill:
+            arcidx = loc_arc_indices[uh.loc.x, uh.loc.y][uh.id]
+            arcs_uphill.append((uh.loc.x - x, uh.loc.y - y, arcidx))
+        for dh in w.downhill:
+            arcidx = loc_arc_indices[dh.loc.x, dh.loc.y][dh.id]
+            arcs_downhill.append((dh.loc.x - x, dh.loc.y - y, arcidx))
+        for bp in wire_bel_pins_uphill[x, y][loc_wire_indices[x, y][name]]:
+            bel, pin = bp
+            bel_x, bel_y, bel_idx = bel
+            belpins_uphill.append(((bel_x - x, bel_y - y, bel_idx), pin))
+        for bp in wire_bel_pins_downhill[x, y][loc_wire_indices[x, y][name]]:
+            bel, pin = bp
+            bel_x, bel_y, bel_idx = bel
+            belpins_downhill.append(((bel_x - x, bel_y - y, bel_idx), pin))
+        assert len(belpins_uphill) <= 1
+        wires.append((name, tuple(arcs_downhill), tuple(arcs_uphill), tuple(belpins_uphill), tuple(belpins_downhill)))
+
+    for bel in loc_bels[x, y]:
+        name, beltype, pins = bel
+        xformed_pins = tuple((p[0], (p[1][0] - x, p[1][1] - y, p[1][2])) for p in pins)
+        bels.append((name, beltype, xformed_pins))
+
+    for arcidx in loc_arcs[x, y]:
+        a = rtile.arcs[arcidx]
+        source_wire = resolve_wirename(rg, a.source, x, y)
+        dest_wire = resolve_wirename(rg, a.sink, x, y)
+        arcs.append((source_wire, dest_wire, a.configurable, get_tiletype_index(rg.to_str(a.tiletype))))
+
+    tile_data = (tuple(wires), tuple(arcs), tuple(bels))
+    if tile_data in location_types:
+        type_at_location[x, y] = location_types[tile_data]
+    else:
+        idx = len(location_types)
+        location_types[tile_data] = idx
+        type_at_location[x, y] = idx
+
+
+class BinaryBlobAssembler:
+    def __init__(self, cname, endianness, nodebug=False):
+        assert endianness in ["le", "be"]
+        self.cname = cname
+        self.endianness = endianness
+        self.finalized = False
+        self.data = bytearray()
+        self.comments = dict()
+        self.labels = dict()
+        self.exports = set()
+        self.labels_byaddr = dict()
+        self.ltypes_byaddr = dict()
+        self.strings = dict()
+        self.refs = dict()
+        self.nodebug = nodebug
+
+    def l(self, name, ltype=None, export=False):
+        assert not self.finalized
+        assert name not in self.labels
+        assert len(self.data) not in self.labels_byaddr
+        self.labels[name] = len(self.data)
+        if ltype is not None:
+            self.ltypes_byaddr[len(self.data)] = ltype
+        self.labels_byaddr[len(self.data)] = name
+        if export:
+            assert ltype is not None
+            self.exports.add(len(self.data))
+
+    def r(self, name, comment):
+        assert not self.finalized
+        assert len(self.data) % 4 == 0
+        assert len(self.data) not in self.refs
+        if self.nodebug:
+            comment = None
+        if name is not None:
+            self.refs[len(self.data)] = (name, comment)
+        self.data.append(0)
+        self.data.append(0)
+        self.data.append(0)
+        self.data.append(0)
+        if (name is None) and (comment is not None):
+            self.comments[len(self.data)] = comment + " (null reference)"
+
+    def s(self, s, comment):
+        assert not self.finalized
+        if self.nodebug:
+            comment = None
+        if s not in self.strings:
+            index = len(self.strings)
+            self.strings[s] = index
+        else:
+            index = self.strings[s]
+        if comment is not None:
+            self.r("str%d" % index, '%s: "%s"' % (comment, s))
+        else:
+            self.r("str%d" % index, None)
+
+    def u8(self, v, comment):
+        assert not self.finalized
+        if self.nodebug:
+            comment = None
+        self.data.append(v)
+        if comment is not None:
+            self.comments[len(self.data)] = comment
+
+    def u16(self, v, comment):
+        assert not self.finalized
+        assert len(self.data) % 2 == 0
+        if self.nodebug:
+            comment = None
+        if self.endianness == "le":
+            self.data.append(v & 255)
+            self.data.append((v >> 8) & 255)
+        elif self.endianness == "be":
+            self.data.append((v >> 8) & 255)
+            self.data.append(v & 255)
+        else:
+            assert 0
+        if comment is not None:
+            self.comments[len(self.data)] = comment
+
+    def s16(self, v, comment):
+        assert not self.finalized
+        assert len(self.data) % 2 == 0
+        if self.nodebug:
+            comment = None
+        c2val = (((-v) ^ 0xffff) + 1) if v < 0 else v
+        if self.endianness == "le":
+            self.data.append(c2val & 255)
+            self.data.append((c2val >> 8) & 255)
+        elif self.endianness == "be":
+            self.data.append((c2val >> 8) & 255)
+            self.data.append(c2val & 255)
+        else:
+            assert 0
+        if comment is not None:
+            self.comments[len(self.data)] = comment
+
+    def u32(self, v, comment):
+        assert not self.finalized
+        assert len(self.data) % 4 == 0
+        if self.nodebug:
+            comment = None
+        if self.endianness == "le":
+            self.data.append(v & 255)
+            self.data.append((v >> 8) & 255)
+            self.data.append((v >> 16) & 255)
+            self.data.append((v >> 24) & 255)
+        elif self.endianness == "be":
+            self.data.append((v >> 24) & 255)
+            self.data.append((v >> 16) & 255)
+            self.data.append((v >> 8) & 255)
+            self.data.append(v & 255)
+        else:
+            assert 0
+        if comment is not None:
+            self.comments[len(self.data)] = comment
+
+    def finalize(self):
+        assert not self.finalized
+        for s, index in sorted(self.strings.items()):
+            self.l("str%d" % index, "char")
+            for c in s:
+                self.data.append(ord(c))
+            self.data.append(0)
+        self.finalized = True
+        cursor = 0
+        while cursor < len(self.data):
+            if cursor in self.refs:
+                v = self.labels[self.refs[cursor][0]] - cursor
+                if self.endianness == "le":
+                    self.data[cursor + 0] = (v & 255)
+                    self.data[cursor + 1] = ((v >> 8) & 255)
+                    self.data[cursor + 2] = ((v >> 16) & 255)
+                    self.data[cursor + 3] = ((v >> 24) & 255)
+                elif self.endianness == "be":
+                    self.data[cursor + 0] = ((v >> 24) & 255)
+                    self.data[cursor + 1] = ((v >> 16) & 255)
+                    self.data[cursor + 2] = ((v >> 8) & 255)
+                    self.data[cursor + 3] = (v & 255)
+                else:
+                    assert 0
+                cursor += 4
+            else:
+                cursor += 1
+
+    def write_verbose_c(self, f, ctype="const unsigned char"):
+        assert self.finalized
+        print("%s %s[%d] = {" % (ctype, self.cname, len(self.data)), file=f)
+        cursor = 0
+        bytecnt = 0
+        while cursor < len(self.data):
+            if cursor in self.comments:
+                if bytecnt == 0:
+                    print(" ", end="", file=f)
+                print(" // %s" % self.comments[cursor], file=f)
+                bytecnt = 0
+            if cursor in self.labels_byaddr:
+                if bytecnt != 0:
+                    print(file=f)
+                if cursor in self.exports:
+                    print("#define %s ((%s*)(%s+%d))" % (
+                        self.labels_byaddr[cursor], self.ltypes_byaddr[cursor], self.cname, cursor), file=f)
+                else:
+                    print("  // [%d] %s" % (cursor, self.labels_byaddr[cursor]), file=f)
+                bytecnt = 0
+            if cursor in self.refs:
+                if bytecnt != 0:
+                    print(file=f)
+                print(" ", end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor + 0]), end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor + 1]), end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor + 2]), end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor + 3]), end="", file=f)
+                print(" // [%d] %s (reference to %s)" % (cursor, self.refs[cursor][1], self.refs[cursor][0]), file=f)
+                bytecnt = 0
+                cursor += 4
+            else:
+                if bytecnt == 0:
+                    print(" ", end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor]), end=("" if bytecnt < 15 else "\n"), file=f)
+                bytecnt = (bytecnt + 1) & 15
+                cursor += 1
+        if bytecnt != 0:
+            print(file=f)
+        print("};", file=f)
+
+    def write_compact_c(self, f, ctype="const unsigned char"):
+        assert self.finalized
+        print("%s %s[%d] = {" % (ctype, self.cname, len(self.data)), file=f)
+        column = 0
+        for v in self.data:
+            if column == 0:
+                print("  ", end="", file=f)
+                column += 2
+            s = "%d," % v
+            print(s, end="", file=f)
+            column += len(s)
+            if column > 75:
+                print(file=f)
+                column = 0
+        if column != 0:
+            print(file=f)
+        for cursor in self.exports:
+            print("#define %s ((%s*)(%s+%d))" % (
+                self.labels_byaddr[cursor], self.ltypes_byaddr[cursor], self.cname, cursor), file=f)
+        print("};", file=f)
+
+    def write_uint64_c(self, f, ctype="const uint64_t"):
+        assert self.finalized
+        print("%s %s[%d] = {" % (ctype, self.cname, (len(self.data) + 7) // 8), file=f)
+        column = 0
+        for i in range((len(self.data) + 7) // 8):
+            v0 = self.data[8 * i + 0] if 8 * i + 0 < len(self.data) else 0
+            v1 = self.data[8 * i + 1] if 8 * i + 1 < len(self.data) else 0
+            v2 = self.data[8 * i + 2] if 8 * i + 2 < len(self.data) else 0
+            v3 = self.data[8 * i + 3] if 8 * i + 3 < len(self.data) else 0
+            v4 = self.data[8 * i + 4] if 8 * i + 4 < len(self.data) else 0
+            v5 = self.data[8 * i + 5] if 8 * i + 5 < len(self.data) else 0
+            v6 = self.data[8 * i + 6] if 8 * i + 6 < len(self.data) else 0
+            v7 = self.data[8 * i + 7] if 8 * i + 7 < len(self.data) else 0
+            if self.endianness == "le":
+                v = v0 << 0
+                v |= v1 << 8
+                v |= v2 << 16
+                v |= v3 << 24
+                v |= v4 << 32
+                v |= v5 << 40
+                v |= v6 << 48
+                v |= v7 << 56
+            elif self.endianness == "be":
+                v = v7 << 0
+                v |= v6 << 8
+                v |= v5 << 16
+                v |= v4 << 24
+                v |= v3 << 32
+                v |= v2 << 40
+                v |= v1 << 48
+                v |= v0 << 56
+            else:
+                assert 0
+            if column == 3:
+                print(" 0x%016x," % v, file=f)
+                column = 0
+            else:
+                if column == 0:
+                    print(" ", end="", file=f)
+                print(" 0x%016x," % v, end="", file=f)
+                column += 1
+        if column != 0:
+            print("", file=f)
+        print("};", file=f)
+
+    def write_string_c(self, f, ctype="const char"):
+        assert self.finalized
+        assert self.data[len(self.data) - 1] == 0
+        print("%s %s[%d] =" % (ctype, self.cname, len(self.data)), file=f)
+        print("  \"", end="", file=f)
+        column = 0
+        for i in range(len(self.data) - 1):
+            if (self.data[i] < 32) or (self.data[i] > 126):
+                print("\\%03o" % self.data[i], end="", file=f)
+                column += 4
+            elif self.data[i] == ord('"') or self.data[i] == ord('\\'):
+                print("\\" + chr(self.data[i]), end="", file=f)
+                column += 2
+            else:
+                print(chr(self.data[i]), end="", file=f)
+                column += 1
+            if column > 70 and (i != len(self.data) - 2):
+                print("\"\n  \"", end="", file=f)
+                column = 0
+        print("\";", file=f)
+
+    def write_binary(self, f):
+        assert self.finalized
+        assert self.data[len(self.data) - 1] == 0
+        f.buffer.write(self.data)
+
+
+bel_types = {
+    "NONE": 0,
+    "SLICE": 1,
+    "PIO": 2
+}
+
+def write_database(dev_name, endianness):
+    def write_loc(x, y, sym_name):
+        bba.s16(x, "%s.x" % sym_name)
+        bba.s16(y, "%s.y" % sym_name)
+
+    bba = BinaryBlobAssembler("chipdb_blob_%s" % dev_name, endianness)
+    bba.r("chip_info", "chip_info")
+
+    for loctype, idx in sorted(location_types.items(), key=lambda x: x[1]):
+        wires, arcs, bels = loctype
+        if len(arcs) > 0:
+            bba.l("loc%d_pips" % idx, "PipInfoPOD")
+            for arc in arcs:
+                src_wire, dst_wire, configurable, tile_type = arc
+                write_loc(src_wire[0], src_wire[1], "src")
+                write_loc(dst_wire[0], dst_wire[1], "dst")
+                bba.u32(src_wire[2], "src_idx")
+                bba.u32(dst_wire[2], "dst_idx")
+                bba.u32(1, "delay")  # TODO:delay
+                bba.u16(tile_type, "tile_type")
+                bba.u8(1 if not configurable else 0, "pip_type")
+                bba.u8(0, "padding")
+        if len(wires) > 0:
+            for wire_idx in range(len(wires)):
+                wire = wires[wire_idx]
+                name, downpips, uppips, downbels, upbels = wire
+                if len(downpips) > 0:
+                    bba.l("loc%d_wire%d_downpips" % (idx, wire_idx), "PipLocatorPOD")
+                    for dp in downpips:
+                        write_loc(dp[0], dp[1], "rel_loc")
+                        bba.u32(dp[2], "index")
+                if len(uppips) > 0:
+                    bba.l("loc%d_wire%d_uppips" % (idx, wire_idx), "PipLocatorPOD")
+                    for up in uppips:
+                        write_loc(up[0], up[1], "rel_loc")
+                        bba.u32(up[2], "index")
+                if len(downbels) > 0:
+                    bba.l("loc%d_wire%d_downbels" % (idx, wire_idx), "BelPortPOD")
+                    for db in downbels:
+                        bel, pin = db
+                        write_loc(bel[0], bel[1], "rel_bel_loc")
+                        bba.u32(bel[2], "bel_index")
+                        bba.u32(pin, "port")
+            bba.l("loc%d_wires" % idx, "WireInfoPOD")
+            for wire_idx in range(len(wires)):
+                wire = wires[wire_idx]
+                name, downpips, uppips, downbels, upbels = wire
+                bba.s(name, "name")
+                bba.u32(len(uppips), "num_uphill")
+                bba.u32(len(downpips), "num_downhill")
+                bba.r("loc%d_wire%d_uppips" % (idx, wire_idx) if len(uppips) > 0 else None, "pips_uphill")
+                bba.r("loc%d_wire%d_downpips" % (idx, wire_idx) if len(downpips) > 0 else None, "pips_downhill")
+                bba.u32(len(downbels), "num_bels_downhill")
+                if len(upbels) == 1:
+                    bel, pin = upbels[0]
+                    write_loc(bel[0], bel[1], "uphill_bel_loc")
+                    bba.u32(bel[2], "uphill_bel_idx")
+                    bba.u32(pin, "uphill_bel_pin")
+                else:
+                    write_loc(-1, -1, "bel_uphill.rel_bel_loc")
+                    bba.u32(0xFFFFFFFF, "bel_uphill.bel_index")
+                    bba.u32(0, "bel_uphill.port")
+                bba.r("loc%d_wire%d_downbels" % (idx, wire_idx) if len(downbels) > 0 else None, "bels_downhill")
+        if len(bels) > 0:
+            for bel_idx in range(len(bels)):
+                bel, beltype, pins = bels[bel_idx]
+                bba.l("loc%d_bel%d_wires" % (idx, bel_idx), "BelPortPOD")
+                for pin in pins:
+                    port, wire = pin
+                    write_loc(wire[0], wire[1], "rel_wire_loc")
+                    bba.u32(wire[2], "wire_index")
+                    bba.u32(port, "port")
+            bba.l("loc%d_bels" % idx, "BelInfoPOD")
+            for bel_idx in range(len(bels)):
+                bel, beltype, pins = bels[bel_idx]
+                bba.s(bel, "name")
+                bba.u32(bel_types[beltype], "type")
+                bba.u32(len(pins), "num_bel_wires")
+                bba.r("loc%d_bel%d_wires" % (idx, bel_idx), "bel_wires")
+
+    bba.l("locations", "LocationTypePOD")
+    for loctype, idx in sorted(location_types.items(), key=lambda x: x[1]):
+        wires, arcs, bels = loctype
+        bba.u32(len(bels), "num_bels")
+        bba.u32(len(wires), "num_wires")
+        bba.u32(len(arcs), "num_pips")
+        bba.r("loc%d_bels" % idx if len(bels) > 0 else None, "bel_data")
+        bba.r("loc%d_wires" % idx if len(wires) > 0 else None, "wire_data")
+        bba.r("loc%d_pips" % idx if len(arcs) > 0 else None, "pips_data")
+
+    bba.l("location_types", "int32_t")
+    for y in range(0, max_row+1):
+        for x in range(0, max_col+1):
+            bba.u32(type_at_location[x, y], "loctype")
+
+    bba.l("tiletype_names", "RelPtr<char>")
+    for tt in tiletype_names:
+        bba.s(tt, "name")
+
+    bba.l("chip_info")
+    bba.u32(max_col + 1, "width")
+    bba.u32(max_row + 1, "height")
+    bba.u32((max_col + 1) * (max_row + 1), "num_tiles")
+    bba.u32(len(location_types), "num_location_types")
+    bba.r("locations", "locations")
+    bba.r("location_types", "location_type")
+    bba.r("tiletype_names", "tiletype_names")
+    bba.finalize()
+    return bba
+
+dev_names = {"25k": "LFE5U-25F", "45k": "LFE5U-45F", "85k": "LFE5U-85F"}
+
+def main():
+    global max_row, max_col
+    pytrellis.load_database(database.get_db_root())
+    args = parser.parse_args()
+
+    # Read port pin file
+    with open(args.portspins) as f:
+        for line in f:
+            line = line.replace("(", " ")
+            line = line.replace(")", " ")
+            line = line.split()
+            if len(line) == 0:
+                continue
+            assert len(line) == 2
+            assert line[0] == "X"
+            idx = len(portpins) + 1
+            portpins[line[1]] = idx
+
+    print("Initialising chip...")
+    chip = pytrellis.Chip(dev_names[args.device])
+    print("Building routing graph...")
+    rg = chip.get_routing_graph()
+    max_row = chip.get_max_row()
+    max_col = chip.get_max_col()
+    print("Indexing wires...")
+    for y in range(0, max_row + 1):
+        for x in range(0, max_col + 1):
+            import_location_wires(rg, x, y)
+    print("Indexing arcs...")
+    for y in range(0, max_row + 1):
+        for x in range(0, max_col + 1):
+            index_location_arcs(rg, x, y)
+    print("Adding bels...")
+    for y in range(0, max_row + 1):
+        for x in range(0, max_col + 1):
+            add_bels(chip, x, y)
+    print("Importing tiles...")
+    for y in range(0, max_row + 1):
+        for x in range(0, max_col + 1):
+            print("     At R{}C{}".format(y, x))
+            import_location(rg, x, y)
+    print("{} unique location types".format(len(location_types)))
+    bba = write_database(args.device, "le")
+
+
+    if args.c_file:
+        print('#include "nextpnr.h"', file=args.outfile)
+        print('NEXTPNR_NAMESPACE_BEGIN', file=args.outfile)
+
+
+    if args.binary:
+        bba.write_binary(args.outfile)
+
+    if args.c_file:
+        bba.write_string_c(args.outfile)
+
+    if args.c_file:
+        print('NEXTPNR_NAMESPACE_END', file=args.outfile)
+
+if __name__ == "__main__":
+    main()
diff --git a/generic/arch.cc b/generic/arch.cc
index 8f897604..390830aa 100644
--- a/generic/arch.cc
+++ b/generic/arch.cc
@@ -19,6 +19,8 @@
 
 #include <math.h>
 #include "nextpnr.h"
+#include "placer1.h"
+#include "router1.h"
 
 NEXTPNR_NAMESPACE_BEGIN
 
@@ -107,28 +109,48 @@ void Arch::addBelInout(IdString bel, IdString name, IdString wire)
     wires.at(wire).downhill_bel_pins.push_back(BelPin{bel, name});
 }
 
-void Arch::addFrameGraphic(const GraphicElement &graphic)
+void Arch::addGroupBel(IdString group, IdString bel) { groups[group].bels.push_back(bel); }
+
+void Arch::addGroupWire(IdString group, IdString wire) { groups[group].wires.push_back(wire); }
+
+void Arch::addGroupPip(IdString group, IdString pip) { groups[group].pips.push_back(pip); }
+
+void Arch::addGroupGroup(IdString group, IdString grp) { groups[group].groups.push_back(grp); }
+
+void Arch::addDecalGraphic(DecalId decal, const GraphicElement &graphic)
 {
-    frame_graphics.push_back(graphic);
-    frameGraphicsReload = true;
+    decal_graphics[decal].push_back(graphic);
+    refreshUi();
 }
 
-void Arch::addWireGraphic(WireId wire, const GraphicElement &graphic)
+void Arch::setFrameDecal(DecalXY decalxy)
 {
-    wires.at(wire).graphics.push_back(graphic);
-    wireGraphicsReload.insert(wire);
+    frame_decalxy = decalxy;
+    refreshUiFrame();
 }
 
-void Arch::addPipGraphic(PipId pip, const GraphicElement &graphic)
+void Arch::setWireDecal(WireId wire, DecalXY decalxy)
 {
-    pips.at(pip).graphics.push_back(graphic);
-    pipGraphicsReload.insert(pip);
+    wires.at(wire).decalxy = decalxy;
+    refreshUiWire(wire);
 }
 
-void Arch::addBelGraphic(BelId bel, const GraphicElement &graphic)
+void Arch::setPipDecal(PipId pip, DecalXY decalxy)
 {
-    bels.at(bel).graphics.push_back(graphic);
-    belGraphicsReload.insert(bel);
+    pips.at(pip).decalxy = decalxy;
+    refreshUiPip(pip);
+}
+
+void Arch::setBelDecal(BelId bel, DecalXY decalxy)
+{
+    bels.at(bel).decalxy = decalxy;
+    refreshUiBel(bel);
+}
+
+void Arch::setGroupDecal(GroupId group, DecalXY decalxy)
+{
+    groups[group].decalxy = decalxy;
+    refreshUiGroup(group);
 }
 
 // ---------------------------------------------------------------
@@ -159,6 +181,7 @@ void Arch::bindBel(BelId bel, IdString cell, PlaceStrength strength)
     bels.at(bel).bound_cell = cell;
     cells.at(cell)->bel = bel;
     cells.at(cell)->belStrength = strength;
+    refreshUiBel(bel);
 }
 
 void Arch::unbindBel(BelId bel)
@@ -166,6 +189,7 @@ void Arch::unbindBel(BelId bel)
     cells.at(bels.at(bel).bound_cell)->bel = BelId();
     cells.at(bels.at(bel).bound_cell)->belStrength = STRENGTH_NONE;
     bels.at(bel).bound_cell = IdString();
+    refreshUiBel(bel);
 }
 
 bool Arch::checkBelAvail(BelId bel) const { return bels.at(bel).bound_cell == IdString(); }
@@ -214,6 +238,7 @@ void Arch::bindWire(WireId wire, IdString net, PlaceStrength strength)
     wires.at(wire).bound_net = net;
     nets.at(net)->wires[wire].pip = PipId();
     nets.at(net)->wires[wire].strength = strength;
+    refreshUiWire(wire);
 }
 
 void Arch::unbindWire(WireId wire)
@@ -221,11 +246,14 @@ void Arch::unbindWire(WireId wire)
     auto &net_wires = nets[wires.at(wire).bound_net]->wires;
 
     auto pip = net_wires.at(wire).pip;
-    if (pip != PipId())
+    if (pip != PipId()) {
         pips.at(pip).bound_net = IdString();
+        refreshUiPip(pip);
+    }
 
     net_wires.erase(wire);
     wires.at(wire).bound_net = IdString();
+    refreshUiWire(wire);
 }
 
 bool Arch::checkWireAvail(WireId wire) const { return wires.at(wire).bound_net == IdString(); }
@@ -260,6 +288,8 @@ void Arch::bindPip(PipId pip, IdString net, PlaceStrength strength)
     wires.at(wire).bound_net = net;
     nets.at(net)->wires[wire].pip = pip;
     nets.at(net)->wires[wire].strength = strength;
+    refreshUiPip(pip);
+    refreshUiWire(wire);
 }
 
 void Arch::unbindPip(PipId pip)
@@ -268,6 +298,8 @@ void Arch::unbindPip(PipId pip)
     nets.at(wires.at(wire).bound_net)->wires.erase(wire);
     pips.at(pip).bound_net = IdString();
     wires.at(wire).bound_net = IdString();
+    refreshUiPip(pip);
+    refreshUiWire(wire);
 }
 
 bool Arch::checkPipAvail(PipId pip) const { return pips.at(pip).bound_net == IdString(); }
@@ -292,6 +324,28 @@ const std::vector<PipId> &Arch::getWireAliases(WireId wire) const { return wires
 
 // ---------------------------------------------------------------
 
+GroupId Arch::getGroupByName(IdString name) const { return name; }
+
+IdString Arch::getGroupName(GroupId group) const { return group; }
+
+std::vector<GroupId> Arch::getGroups() const
+{
+    std::vector<GroupId> ret;
+    for (auto &it : groups)
+        ret.push_back(it.first);
+    return ret;
+}
+
+const std::vector<BelId> &Arch::getGroupBels(GroupId group) const { return groups.at(group).bels; }
+
+const std::vector<WireId> &Arch::getGroupWires(GroupId group) const { return groups.at(group).wires; }
+
+const std::vector<PipId> &Arch::getGroupPips(GroupId group) const { return groups.at(group).pips; }
+
+const std::vector<GroupId> &Arch::getGroupGroups(GroupId group) const { return groups.at(group).groups; }
+
+// ---------------------------------------------------------------
+
 void Arch::estimatePosition(BelId bel, int &x, int &y, bool &gb) const
 {
     x = bels.at(bel).grid_x;
@@ -310,13 +364,23 @@ delay_t Arch::estimateDelay(WireId src, WireId dst) const
 
 // ---------------------------------------------------------------
 
-const std::vector<GraphicElement> &Arch::getFrameGraphics() const { return frame_graphics; }
+bool Arch::place() { return placer1(getCtx()); }
 
-const std::vector<GraphicElement> &Arch::getBelGraphics(BelId bel) const { return bels.at(bel).graphics; }
+bool Arch::route() { return router1(getCtx()); }
 
-const std::vector<GraphicElement> &Arch::getWireGraphics(WireId wire) const { return wires.at(wire).graphics; }
+// ---------------------------------------------------------------
 
-const std::vector<GraphicElement> &Arch::getPipGraphics(PipId pip) const { return pips.at(pip).graphics; }
+const std::vector<GraphicElement> &Arch::getDecalGraphics(DecalId decal) const { return decal_graphics.at(decal); }
+
+DecalXY Arch::getFrameDecal() const { return frame_decalxy; }
+
+DecalXY Arch::getBelDecal(BelId bel) const { return bels.at(bel).decalxy; }
+
+DecalXY Arch::getWireDecal(WireId wire) const { return wires.at(wire).decalxy; }
+
+DecalXY Arch::getPipDecal(PipId pip) const { return pips.at(pip).decalxy; }
+
+DecalXY Arch::getGroupDecal(GroupId group) const { return groups.at(group).decalxy; }
 
 // ---------------------------------------------------------------
 
diff --git a/generic/arch.h b/generic/arch.h
index e739cfab..5d7ac540 100644
--- a/generic/arch.h
+++ b/generic/arch.h
@@ -34,16 +34,16 @@ struct PipInfo
     IdString name, bound_net;
     WireId srcWire, dstWire;
     DelayInfo delay;
-    std::vector<GraphicElement> graphics;
+    DecalXY decalxy;
 };
 
 struct WireInfo
 {
     IdString name, bound_net;
-    std::vector<GraphicElement> graphics;
     std::vector<PipId> downhill, uphill, aliases;
     BelPin uphill_bel_pin;
     std::vector<BelPin> downhill_bel_pins;
+    DecalXY decalxy;
     int grid_x, grid_y;
 };
 
@@ -58,11 +58,21 @@ struct BelInfo
 {
     IdString name, type, bound_cell;
     std::unordered_map<IdString, PinInfo> pins;
-    std::vector<GraphicElement> graphics;
+    DecalXY decalxy;
     int grid_x, grid_y;
     bool gb;
 };
 
+struct GroupInfo
+{
+    IdString name;
+    std::vector<BelId> bels;
+    std::vector<WireId> wires;
+    std::vector<PipId> pips;
+    std::vector<GroupId> groups;
+    DecalXY decalxy;
+};
+
 struct Arch : BaseCtx
 {
     std::string chipName;
@@ -70,11 +80,14 @@ struct Arch : BaseCtx
     std::unordered_map<IdString, WireInfo> wires;
     std::unordered_map<IdString, PipInfo> pips;
     std::unordered_map<IdString, BelInfo> bels;
+    std::unordered_map<GroupId, GroupInfo> groups;
 
     std::vector<IdString> bel_ids, wire_ids, pip_ids;
     std::unordered_map<IdString, std::vector<IdString>> bel_ids_by_type;
 
-    std::vector<GraphicElement> frame_graphics;
+    std::unordered_map<DecalId, std::vector<GraphicElement>> decal_graphics;
+    DecalXY frame_decalxy;
+
     float grid_distance_to_delay;
 
     void addWire(IdString name, int x, int y);
@@ -86,10 +99,17 @@ struct Arch : BaseCtx
     void addBelOutput(IdString bel, IdString name, IdString wire);
     void addBelInout(IdString bel, IdString name, IdString wire);
 
-    void addFrameGraphic(const GraphicElement &graphic);
-    void addWireGraphic(WireId wire, const GraphicElement &graphic);
-    void addPipGraphic(PipId pip, const GraphicElement &graphic);
-    void addBelGraphic(BelId bel, const GraphicElement &graphic);
+    void addGroupBel(IdString group, IdString bel);
+    void addGroupWire(IdString group, IdString wire);
+    void addGroupPip(IdString group, IdString pip);
+    void addGroupGroup(IdString group, IdString grp);
+
+    void addDecalGraphic(DecalId decal, const GraphicElement &graphic);
+    void setFrameDecal(DecalXY decalxy);
+    void setWireDecal(WireId wire, DecalXY decalxy);
+    void setPipDecal(PipId pip, DecalXY decalxy);
+    void setBelDecal(BelId bel, DecalXY decalxy);
+    void setGroupDecal(GroupId group, DecalXY decalxy);
 
     // ---------------------------------------------------------------
     // Common Arch API. Every arch must provide the following methods.
@@ -148,6 +168,14 @@ struct Arch : BaseCtx
     const std::vector<PipId> &getPipsUphill(WireId wire) const;
     const std::vector<PipId> &getWireAliases(WireId wire) const;
 
+    GroupId getGroupByName(IdString name) const;
+    IdString getGroupName(GroupId group) const;
+    std::vector<GroupId> getGroups() const;
+    const std::vector<BelId> &getGroupBels(GroupId group) const;
+    const std::vector<WireId> &getGroupWires(GroupId group) const;
+    const std::vector<PipId> &getGroupPips(GroupId group) const;
+    const std::vector<GroupId> &getGroupGroups(GroupId group) const;
+
     void estimatePosition(BelId bel, int &x, int &y, bool &gb) const;
     delay_t estimateDelay(WireId src, WireId dst) const;
     delay_t getDelayEpsilon() const { return 0.01; }
@@ -155,16 +183,16 @@ struct Arch : BaseCtx
     float getDelayNS(delay_t v) const { return v; }
     uint32_t getDelayChecksum(delay_t v) const { return 0; }
 
-    const std::vector<GraphicElement> &getFrameGraphics() const;
-    const std::vector<GraphicElement> &getBelGraphics(BelId bel) const;
-    const std::vector<GraphicElement> &getWireGraphics(WireId wire) const;
-    const std::vector<GraphicElement> &getPipGraphics(PipId pip) const;
+    bool pack() { return true; }
+    bool place();
+    bool route();
 
-    bool allGraphicsReload = false;
-    bool frameGraphicsReload = false;
-    std::unordered_set<BelId> belGraphicsReload;
-    std::unordered_set<WireId> wireGraphicsReload;
-    std::unordered_set<PipId> pipGraphicsReload;
+    const std::vector<GraphicElement> &getDecalGraphics(DecalId decal) const;
+    DecalXY getFrameDecal() const;
+    DecalXY getBelDecal(BelId bel) const;
+    DecalXY getWireDecal(WireId wire) const;
+    DecalXY getPipDecal(PipId pip) const;
+    DecalXY getGroupDecal(GroupId group) const;
 
     bool getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort, delay_t &delay) const;
     IdString getPortClock(const CellInfo *cell, IdString port) const;
diff --git a/generic/archdefs.h b/generic/archdefs.h
index 9e8462e0..9969014b 100644
--- a/generic/archdefs.h
+++ b/generic/archdefs.h
@@ -49,5 +49,7 @@ typedef IdString PortPin;
 typedef IdString BelId;
 typedef IdString WireId;
 typedef IdString PipId;
+typedef IdString GroupId;
+typedef IdString DecalId;
 
 NEXTPNR_NAMESPACE_END
diff --git a/generic/main.cc b/generic/main.cc
index d025d8d4..3b8b3fe6 100644
--- a/generic/main.cc
+++ b/generic/main.cc
@@ -90,24 +90,34 @@ int main(int argc, char *argv[])
             return 1;
         }
 
-        Context ctx(ArchArgs{});
+        std::unique_ptr<Context> ctx = std::unique_ptr<Context>(new Context(ArchArgs{}));
 
         if (vm.count("verbose")) {
-            ctx.verbose = true;
+            ctx->verbose = true;
         }
 
         if (vm.count("force")) {
-            ctx.force = true;
+            ctx->force = true;
         }
 
         if (vm.count("seed")) {
-            ctx.rngseed(vm["seed"].as<int>());
+            ctx->rngseed(vm["seed"].as<int>());
         }
 
+#ifndef NO_GUI
+        if (vm.count("gui")) {
+            Application a(argc, argv);
+            MainWindow w(std::move(ctx));
+            w.show();
+
+            return a.exec();
+        }
+#endif
+
 #ifndef NO_PYTHON
         if (vm.count("run")) {
             init_python(argv[0], true);
-            python_export_global("ctx", ctx);
+            python_export_global("ctx", *ctx.get());
 
             std::vector<std::string> files = vm["run"].as<std::vector<std::string>>();
             for (auto filename : files)
@@ -117,15 +127,6 @@ int main(int argc, char *argv[])
         }
 #endif
 
-#ifndef NO_GUI
-        if (vm.count("gui")) {
-            Application a(argc, argv);
-            MainWindow w;
-            w.show();
-
-            rc = a.exec();
-        }
-#endif
         return rc;
     } catch (log_execution_error_exception) {
 #if defined(_MSC_VER)
diff --git a/gui/CMakeLists.txt b/gui/CMakeLists.txt
index 68fd0229..2e8e367e 100644
--- a/gui/CMakeLists.txt
+++ b/gui/CMakeLists.txt
@@ -12,7 +12,6 @@ if (BUILD_PYTHON)
     
     ../3rdparty/python-console/modified/pyredirector.cc 
     ../3rdparty/python-console/modified/pyinterpreter.cc 
-    ../3rdparty/python-console/modified/pyconsole.cc 
   )
 endif()
 
@@ -26,6 +25,7 @@ qt5_add_resources(GUI_RESOURCE_FILES ${_RESOURCES})
 set(GUI_LIBRARY_FILES_${ufamily} Qt5::Widgets Qt5::OpenGL ${OPENGL_LIBRARIES} QtPropertyBrowser PARENT_SCOPE)
 
 add_library(gui_${family} STATIC ${GUI_SOURCE_FILES} ${PYTHON_CONSOLE_SRC} ${GUI_RESOURCE_FILES})
+include(${family}/family.cmake)
 
 target_include_directories(gui_${family} PRIVATE ../${family} ${family} ../3rdparty/QtPropertyBrowser/src)
 if (BUILD_PYTHON)
diff --git a/gui/base.qrc b/gui/base.qrc
index b9e2f237..bf21986b 100644
--- a/gui/base.qrc
+++ b/gui/base.qrc
@@ -4,5 +4,11 @@
         <file>resources/open.png</file>
         <file>resources/save.png</file>
         <file>resources/exit.png</file>
+        <file>resources/zoom.png</file>
+        <file>resources/resultset_first.png</file>
+        <file>resources/resultset_previous.png</file>
+        <file>resources/resultset_next.png</file>
+        <file>resources/resultset_last.png</file>
+        <file>resources/splash.png</file>
     </qresource>
 </RCC>
diff --git a/gui/basewindow.cc b/gui/basewindow.cc
index 2463027a..07b71105 100644
--- a/gui/basewindow.cc
+++ b/gui/basewindow.cc
@@ -18,6 +18,7 @@
  */
 
 #include <QAction>
+#include <QCoreApplication>
 #include <QFileDialog>
 #include <QGridLayout>
 #include <QIcon>
@@ -27,16 +28,14 @@
 #include "jsonparse.h"
 #include "log.h"
 #include "mainwindow.h"
-
-#ifndef NO_PYTHON
 #include "pythontab.h"
-#endif
 
 static void initBasenameResource() { Q_INIT_RESOURCE(base); }
 
 NEXTPNR_NAMESPACE_BEGIN
 
-BaseMainWindow::BaseMainWindow(QWidget *parent) : QMainWindow(parent), ctx(nullptr)
+BaseMainWindow::BaseMainWindow(std::unique_ptr<Context> context, QWidget *parent)
+        : QMainWindow(parent), ctx(std::move(context))
 {
     initBasenameResource();
     qRegisterMetaType<std::string>();
@@ -44,7 +43,7 @@ BaseMainWindow::BaseMainWindow(QWidget *parent) : QMainWindow(parent), ctx(nullp
     log_files.clear();
     log_streams.clear();
 
-    setObjectName(QStringLiteral("BaseMainWindow"));
+    setObjectName("BaseMainWindow");
     resize(1024, 768);
 
     createMenusAndBars();
@@ -63,70 +62,80 @@ BaseMainWindow::BaseMainWindow(QWidget *parent) : QMainWindow(parent), ctx(nullp
 
     setCentralWidget(centralWidget);
 
-    DesignWidget *designview = new DesignWidget();
+    designview = new DesignWidget();
     designview->setMinimumWidth(300);
-    designview->setMaximumWidth(300);
     splitter_h->addWidget(designview);
 
-    connect(this, SIGNAL(contextChanged(Context *)), designview, SLOT(newContext(Context *)));
-    connect(this, SIGNAL(updateTreeView()), designview, SLOT(updateTree()));
-
-    connect(designview, SIGNAL(info(std::string)), this, SLOT(writeInfo(std::string)));
-
     tabWidget = new QTabWidget();
-#ifndef NO_PYTHON
-    PythonTab *pythontab = new PythonTab();
-    tabWidget->addTab(pythontab, "Python");
-    connect(this, SIGNAL(contextChanged(Context *)), pythontab, SLOT(newContext(Context *)));
-#endif
-    info = new InfoTab();
-    tabWidget->addTab(info, "Info");
+
+    console = new PythonTab();
+    tabWidget->addTab(console, "Console");
+    connect(this, SIGNAL(contextChanged(Context *)), console, SLOT(newContext(Context *)));
 
     centralTabWidget = new QTabWidget();
     FPGAViewWidget *fpgaView = new FPGAViewWidget();
     centralTabWidget->addTab(fpgaView, "Graphics");
 
     connect(this, SIGNAL(contextChanged(Context *)), fpgaView, SLOT(newContext(Context *)));
+    connect(designview, SIGNAL(selected(std::vector<DecalXY>)), fpgaView,
+            SLOT(onSelectedArchItem(std::vector<DecalXY>)));
+
+    connect(designview, SIGNAL(highlight(std::vector<DecalXY>, int)), fpgaView,
+            SLOT(onHighlightGroupChanged(std::vector<DecalXY>, int)));
+
+    connect(this, SIGNAL(contextChanged(Context *)), designview, SLOT(newContext(Context *)));
+    connect(this, SIGNAL(updateTreeView()), designview, SLOT(updateTree()));
+
+    connect(designview, SIGNAL(info(std::string)), this, SLOT(writeInfo(std::string)));
 
     splitter_v->addWidget(centralTabWidget);
     splitter_v->addWidget(tabWidget);
+    displaySplash();
 }
 
 BaseMainWindow::~BaseMainWindow() {}
 
-void BaseMainWindow::writeInfo(std::string text) { info->info(text); }
+void BaseMainWindow::displaySplash()
+{
+    splash = new QSplashScreen();
+    splash->setPixmap(QPixmap(":/icons/resources/splash.png"));
+    splash->show();
+    connect(designview, SIGNAL(finishContextLoad()), splash, SLOT(close()));
+    connect(designview, SIGNAL(contextLoadStatus(std::string)), this, SLOT(displaySplashMessage(std::string)));
+    QCoreApplication::instance()->processEvents();
+}
+
+void BaseMainWindow::displaySplashMessage(std::string msg)
+{
+    splash->showMessage(msg.c_str(), Qt::AlignCenter | Qt::AlignBottom, Qt::white);
+    QCoreApplication::instance()->processEvents();
+}
+
+void BaseMainWindow::writeInfo(std::string text) { console->info(text); }
 
 void BaseMainWindow::createMenusAndBars()
 {
     actionNew = new QAction("New", this);
-    QIcon iconNew;
-    iconNew.addFile(QStringLiteral(":/icons/resources/new.png"));
-    actionNew->setIcon(iconNew);
+    actionNew->setIcon(QIcon(":/icons/resources/new.png"));
     actionNew->setShortcuts(QKeySequence::New);
     actionNew->setStatusTip("New project file");
     connect(actionNew, SIGNAL(triggered()), this, SLOT(new_proj()));
 
     actionOpen = new QAction("Open", this);
-    QIcon iconOpen;
-    iconOpen.addFile(QStringLiteral(":/icons/resources/open.png"));
-    actionOpen->setIcon(iconOpen);
+    actionOpen->setIcon(QIcon(":/icons/resources/open.png"));
     actionOpen->setShortcuts(QKeySequence::Open);
     actionOpen->setStatusTip("Open an existing project file");
     connect(actionOpen, SIGNAL(triggered()), this, SLOT(open_proj()));
 
     QAction *actionSave = new QAction("Save", this);
-    QIcon iconSave;
-    iconSave.addFile(QStringLiteral(":/icons/resources/save.png"));
-    actionSave->setIcon(iconSave);
+    actionSave->setIcon(QIcon(":/icons/resources/save.png"));
     actionSave->setShortcuts(QKeySequence::Save);
     actionSave->setStatusTip("Save existing project to disk");
-    connect(actionSave, SIGNAL(triggered()), this, SLOT(save_proj()));
     actionSave->setEnabled(false);
+    connect(actionSave, SIGNAL(triggered()), this, SLOT(save_proj()));
 
     QAction *actionExit = new QAction("Exit", this);
-    QIcon iconExit;
-    iconExit.addFile(QStringLiteral(":/icons/resources/exit.png"));
-    actionExit->setIcon(iconExit);
+    actionExit->setIcon(QIcon(":/icons/resources/exit.png"));
     actionExit->setShortcuts(QKeySequence::Quit);
     actionExit->setStatusTip("Exit the application");
     connect(actionExit, SIGNAL(triggered()), this, SLOT(close()));
@@ -145,6 +154,12 @@ void BaseMainWindow::createMenusAndBars()
     addToolBar(Qt::TopToolBarArea, mainToolBar);
 
     statusBar = new QStatusBar();
+    progressBar = new QProgressBar(statusBar);
+    progressBar->setAlignment(Qt::AlignRight);
+    progressBar->setMaximumSize(180, 19);
+    statusBar->addPermanentWidget(progressBar);
+    progressBar->setValue(0);
+    progressBar->setEnabled(false);
     setStatusBar(statusBar);
 
     menu_File->addAction(actionNew);
diff --git a/gui/basewindow.h b/gui/basewindow.h
index 5c06fa6e..18b5339e 100644
--- a/gui/basewindow.h
+++ b/gui/basewindow.h
@@ -20,34 +20,41 @@
 #ifndef BASEMAINWINDOW_H
 #define BASEMAINWINDOW_H
 
-#include "infotab.h"
 #include "nextpnr.h"
 
 #include <QMainWindow>
 #include <QMenu>
 #include <QMenuBar>
+#include <QProgressBar>
+#include <QSplashScreen>
 #include <QStatusBar>
 #include <QTabWidget>
 #include <QToolBar>
 
 Q_DECLARE_METATYPE(std::string)
+Q_DECLARE_METATYPE(NEXTPNR_NAMESPACE_PREFIX DecalXY)
 
 NEXTPNR_NAMESPACE_BEGIN
 
+class PythonTab;
+class DesignWidget;
+
 class BaseMainWindow : public QMainWindow
 {
     Q_OBJECT
 
   public:
-    explicit BaseMainWindow(QWidget *parent = 0);
+    explicit BaseMainWindow(std::unique_ptr<Context> context, QWidget *parent = 0);
     virtual ~BaseMainWindow();
-    Context *getContext() { return ctx; }
+    Context *getContext() { return ctx.get(); }
 
   protected:
     void createMenusAndBars();
+    void displaySplash();
 
   protected Q_SLOTS:
     void writeInfo(std::string text);
+    void displaySplashMessage(std::string msg);
 
     virtual void new_proj() = 0;
     virtual void open_proj() = 0;
@@ -58,16 +65,19 @@ class BaseMainWindow : public QMainWindow
     void updateTreeView();
 
   protected:
-    Context *ctx;
+    std::unique_ptr<Context> ctx;
     QTabWidget *tabWidget;
     QTabWidget *centralTabWidget;
-    InfoTab *info;
+    PythonTab *console;
 
     QMenuBar *menuBar;
     QToolBar *mainToolBar;
     QStatusBar *statusBar;
     QAction *actionNew;
     QAction *actionOpen;
+    QProgressBar *progressBar;
+    QSplashScreen *splash;
+    DesignWidget *designview;
 };
 
 NEXTPNR_NAMESPACE_END
diff --git a/gui/designwidget.cc b/gui/designwidget.cc
index 4922074b..335ed929 100644
--- a/gui/designwidget.cc
+++ b/gui/designwidget.cc
@@ -20,23 +20,15 @@
 #include "designwidget.h"
 #include <QAction>
 #include <QGridLayout>
+#include <QLineEdit>
 #include <QMenu>
 #include <QSplitter>
+#include <QToolBar>
 #include <QTreeWidgetItem>
 #include "fpgaviewwidget.h"
 
 NEXTPNR_NAMESPACE_BEGIN
 
-enum class ElementType
-{
-    NONE,
-    BEL,
-    WIRE,
-    PIP,
-    NET,
-    CELL
-};
-
 class ElementTreeItem : public QTreeWidgetItem
 {
   public:
@@ -85,12 +77,88 @@ DesignWidget::DesignWidget(QWidget *parent) : QWidget(parent), ctx(nullptr), net
     propertyEditor = new QtTreePropertyBrowser(this);
     propertyEditor->setFactoryForManager(variantManager, variantFactory);
     propertyEditor->setPropertiesWithoutValueMarked(true);
-
     propertyEditor->show();
+    propertyEditor->treeWidget()->setContextMenuPolicy(Qt::CustomContextMenu);
+
+    QLineEdit *lineEdit = new QLineEdit();
+    lineEdit->setClearButtonEnabled(true);
+    lineEdit->addAction(QIcon(":/icons/resources/zoom.png"), QLineEdit::LeadingPosition);
+    lineEdit->setPlaceholderText("Search...");
+
+    actionFirst = new QAction("", this);
+    actionFirst->setIcon(QIcon(":/icons/resources/resultset_first.png"));
+    actionFirst->setEnabled(false);
+    connect(actionFirst, &QAction::triggered, this, [this] {
+        history_ignore = true;
+        history_index = 0;
+        treeWidget->setCurrentItem(history.at(history_index));
+        updateButtons();
+    });
+
+    actionPrev = new QAction("", this);
+    actionPrev->setIcon(QIcon(":/icons/resources/resultset_previous.png"));
+    actionPrev->setEnabled(false);
+    connect(actionPrev, &QAction::triggered, this, [this] {
+        history_ignore = true;
+        history_index--;
+        treeWidget->setCurrentItem(history.at(history_index));
+        updateButtons();
+    });
+
+    actionNext = new QAction("", this);
+    actionNext->setIcon(QIcon(":/icons/resources/resultset_next.png"));
+    actionNext->setEnabled(false);
+    connect(actionNext, &QAction::triggered, this, [this] {
+        history_ignore = true;
+        history_index++;
+        treeWidget->setCurrentItem(history.at(history_index));
+        updateButtons();
+    });
+
+    actionLast = new QAction("", this);
+    actionLast->setIcon(QIcon(":/icons/resources/resultset_last.png"));
+    actionLast->setEnabled(false);
+    connect(actionLast, &QAction::triggered, this, [this] {
+        history_ignore = true;
+        history_index = int(history.size() - 1);
+        treeWidget->setCurrentItem(history.at(history_index));
+        updateButtons();
+    });
+
+    QToolBar *toolbar = new QToolBar();
+    toolbar->addAction(actionFirst);
+    toolbar->addAction(actionPrev);
+    toolbar->addAction(actionNext);
+    toolbar->addAction(actionLast);
+
+    QWidget *topWidget = new QWidget();
+    QVBoxLayout *vbox1 = new QVBoxLayout();
+    topWidget->setLayout(vbox1);
+    vbox1->setSpacing(5);
+    vbox1->setContentsMargins(0, 0, 0, 0);
+    vbox1->addWidget(lineEdit);
+    vbox1->addWidget(treeWidget);
+
+    QWidget *toolbarWidget = new QWidget();
+    QHBoxLayout *hbox = new QHBoxLayout;
+    hbox->setAlignment(Qt::AlignCenter);
+    toolbarWidget->setLayout(hbox);
+    hbox->setSpacing(0);
+    hbox->setContentsMargins(0, 0, 0, 0);
+    hbox->addWidget(toolbar);
+
+    QWidget *btmWidget = new QWidget();
+
+    QVBoxLayout *vbox2 = new QVBoxLayout();
+    btmWidget->setLayout(vbox2);
+    vbox2->setSpacing(0);
+    vbox2->setContentsMargins(0, 0, 0, 0);
+    vbox2->addWidget(toolbarWidget);
+    vbox2->addWidget(propertyEditor);
 
     QSplitter *splitter = new QSplitter(Qt::Vertical);
-    splitter->addWidget(treeWidget);
-    splitter->addWidget(propertyEditor);
+    splitter->addWidget(topWidget);
+    splitter->addWidget(btmWidget);
 
     QGridLayout *mainLayout = new QGridLayout();
     mainLayout->setSpacing(0);
@@ -99,16 +167,61 @@ DesignWidget::DesignWidget(QWidget *parent) : QWidget(parent), ctx(nullptr), net
     setLayout(mainLayout);
 
     // Connection
-    connect(treeWidget, &QTreeWidget::customContextMenuRequested, this, &DesignWidget::prepareMenu);
+    connect(propertyEditor->treeWidget(), &QTreeWidget::customContextMenuRequested, this,
+            &DesignWidget::prepareMenuProperty);
+    connect(propertyEditor->treeWidget(), &QTreeWidget::itemDoubleClicked, this, &DesignWidget::onItemDoubleClicked);
 
-    connect(treeWidget, SIGNAL(itemClicked(QTreeWidgetItem *, int)), SLOT(onItemClicked(QTreeWidgetItem *, int)));
+    connect(treeWidget, SIGNAL(itemSelectionChanged()), SLOT(onItemSelectionChanged()));
+    connect(treeWidget, &QTreeWidget::customContextMenuRequested, this, &DesignWidget::prepareMenuTree);
+
+    history_index = -1;
+    history_ignore = false;
+
+    highlightColors[0] = QColor("#6495ed");
+    highlightColors[1] = QColor("#7fffd4");
+    highlightColors[2] = QColor("#98fb98");
+    highlightColors[3] = QColor("#ffd700");
+    highlightColors[4] = QColor("#cd5c5c");
+    highlightColors[5] = QColor("#fa8072");
+    highlightColors[6] = QColor("#ff69b4");
+    highlightColors[7] = QColor("#da70d6");
 }
 
 DesignWidget::~DesignWidget() {}
 
+void DesignWidget::updateButtons()
+{
+    int count = int(history.size());
+    actionFirst->setEnabled(history_index > 0);
+    actionPrev->setEnabled(history_index > 0);
+    actionNext->setEnabled(history_index < (count - 1));
+    actionLast->setEnabled(history_index < (count - 1));
+}
+
+void DesignWidget::addToHistory(QTreeWidgetItem *item)
+{
+    if (!history_ignore) {
+        int count = int(history.size());
+        for (int i = count - 1; i > history_index; i--)
+            history.pop_back();
+        history.push_back(item);
+        history_index++;
+    }
+    history_ignore = false;
+    updateButtons();
+}
+
 void DesignWidget::newContext(Context *ctx)
 {
     treeWidget->clear();
+    history_ignore = false;
+    history_index = -1;
+    history.clear();
+    updateButtons();
+
+    for (int i = 0; i < 6; i++)
+        nameToItem[i].clear();
+
     this->ctx = ctx;
 
     // Add bels to tree
@@ -117,6 +230,7 @@ void DesignWidget::newContext(Context *ctx)
     bel_root->setText(0, "Bels");
     treeWidget->insertTopLevelItem(0, bel_root);
     if (ctx) {
+        Q_EMIT contextLoadStatus("Configuring bels...");
         for (auto bel : ctx->getBels()) {
             auto id = ctx->getBelName(bel);
             QStringList items = QString(id.c_str(ctx)).split("/");
@@ -128,7 +242,7 @@ void DesignWidget::newContext(Context *ctx)
                 name += items.at(i);
                 if (!bel_items.contains(name)) {
                     if (i == items.size() - 1)
-                        bel_items.insert(name, new IdStringTreeItem(id, ElementType::BEL, items.at(i), parent));
+                        nameToItem[0].insert(name, new IdStringTreeItem(id, ElementType::BEL, items.at(i), parent));
                     else
                         bel_items.insert(name, new ElementTreeItem(ElementType::NONE, items.at(i), parent));
                 }
@@ -139,6 +253,9 @@ void DesignWidget::newContext(Context *ctx)
     for (auto bel : bel_items.toStdMap()) {
         bel_root->addChild(bel.second);
     }
+    for (auto bel : nameToItem[0].toStdMap()) {
+        bel_root->addChild(bel.second);
+    }
 
     // Add wires to tree
     QTreeWidgetItem *wire_root = new QTreeWidgetItem(treeWidget);
@@ -146,6 +263,7 @@ void DesignWidget::newContext(Context *ctx)
     wire_root->setText(0, "Wires");
     treeWidget->insertTopLevelItem(0, wire_root);
     if (ctx) {
+        Q_EMIT contextLoadStatus("Configuring wires...");
         for (auto wire : ctx->getWires()) {
             auto id = ctx->getWireName(wire);
             QStringList items = QString(id.c_str(ctx)).split("/");
@@ -157,7 +275,7 @@ void DesignWidget::newContext(Context *ctx)
                 name += items.at(i);
                 if (!wire_items.contains(name)) {
                     if (i == items.size() - 1)
-                        wire_items.insert(name, new IdStringTreeItem(id, ElementType::WIRE, items.at(i), parent));
+                        nameToItem[1].insert(name, new IdStringTreeItem(id, ElementType::WIRE, items.at(i), parent));
                     else
                         wire_items.insert(name, new ElementTreeItem(ElementType::NONE, items.at(i), parent));
                 }
@@ -168,13 +286,16 @@ void DesignWidget::newContext(Context *ctx)
     for (auto wire : wire_items.toStdMap()) {
         wire_root->addChild(wire.second);
     }
-
+    for (auto wire : nameToItem[1].toStdMap()) {
+        wire_root->addChild(wire.second);
+    }
     // Add pips to tree
     QTreeWidgetItem *pip_root = new QTreeWidgetItem(treeWidget);
     QMap<QString, QTreeWidgetItem *> pip_items;
     pip_root->setText(0, "Pips");
     treeWidget->insertTopLevelItem(0, pip_root);
     if (ctx) {
+        Q_EMIT contextLoadStatus("Configuring pips...");
         for (auto pip : ctx->getPips()) {
             auto id = ctx->getPipName(pip);
             QStringList items = QString(id.c_str(ctx)).split("/");
@@ -186,7 +307,7 @@ void DesignWidget::newContext(Context *ctx)
                 name += items.at(i);
                 if (!pip_items.contains(name)) {
                     if (i == items.size() - 1)
-                        pip_items.insert(name, new IdStringTreeItem(id, ElementType::PIP, items.at(i), parent));
+                        nameToItem[2].insert(name, new IdStringTreeItem(id, ElementType::PIP, items.at(i), parent));
                     else
                         pip_items.insert(name, new ElementTreeItem(ElementType::NONE, items.at(i), parent));
                 }
@@ -197,6 +318,9 @@ void DesignWidget::newContext(Context *ctx)
     for (auto pip : pip_items.toStdMap()) {
         pip_root->addChild(pip.second);
     }
+    for (auto pip : nameToItem[2].toStdMap()) {
+        pip_root->addChild(pip.second);
+    }
 
     // Add nets to tree
     nets_root = new QTreeWidgetItem(treeWidget);
@@ -207,6 +331,8 @@ void DesignWidget::newContext(Context *ctx)
     cells_root = new QTreeWidgetItem(treeWidget);
     cells_root->setText(0, "Cells");
     treeWidget->insertTopLevelItem(0, cells_root);
+
+    Q_EMIT finishContextLoad();
 }
 
 void DesignWidget::updateTree()
@@ -214,45 +340,48 @@ void DesignWidget::updateTree()
     clearProperties();
     delete nets_root;
     delete cells_root;
+    nameToItem[3].clear();
+    nameToItem[4].clear();
 
     // Add nets to tree
     nets_root = new QTreeWidgetItem(treeWidget);
-    QMap<QString, QTreeWidgetItem *> nets_items;
     nets_root->setText(0, "Nets");
     treeWidget->insertTopLevelItem(0, nets_root);
     if (ctx) {
         for (auto &item : ctx->nets) {
             auto id = item.first;
             QString name = QString(id.c_str(ctx));
-            nets_items.insert(name, new IdStringTreeItem(id, ElementType::NET, name, nullptr));
+            IdStringTreeItem *newItem = new IdStringTreeItem(id, ElementType::NET, name, nullptr);
+            nameToItem[3].insert(name, newItem);
         }
     }
-    for (auto item : nets_items.toStdMap()) {
+    for (auto item : nameToItem[3].toStdMap()) {
         nets_root->addChild(item.second);
     }
 
     // Add cells to tree
     cells_root = new QTreeWidgetItem(treeWidget);
-    QMap<QString, QTreeWidgetItem *> cells_items;
     cells_root->setText(0, "Cells");
     treeWidget->insertTopLevelItem(0, cells_root);
     if (ctx) {
         for (auto &item : ctx->cells) {
             auto id = item.first;
             QString name = QString(id.c_str(ctx));
-            cells_items.insert(name, new IdStringTreeItem(id, ElementType::CELL, name, nullptr));
+            IdStringTreeItem *newItem = new IdStringTreeItem(id, ElementType::CELL, name, nullptr);
+            nameToItem[4].insert(name, newItem);
         }
     }
-    for (auto item : cells_items.toStdMap()) {
+    for (auto item : nameToItem[4].toStdMap()) {
         cells_root->addChild(item.second);
     }
 }
-
-void DesignWidget::addProperty(QtProperty *property, const QString &id)
+QtProperty *DesignWidget::addTopLevelProperty(const QString &id)
 {
-    propertyToId[property] = id;
-    idToProperty[id] = property;
-    propertyEditor->addProperty(property);
+    QtProperty *topItem = groupManager->addProperty(id);
+    propertyToId[topItem] = id;
+    idToProperty[id] = topItem;
+    propertyEditor->addProperty(topItem);
+    return topItem;
 }
 
 void DesignWidget::clearProperties()
@@ -266,8 +395,75 @@ void DesignWidget::clearProperties()
     idToProperty.clear();
 }
 
-void DesignWidget::onItemClicked(QTreeWidgetItem *clickItem, int pos)
+QString DesignWidget::getElementTypeName(ElementType type)
 {
+    if (type == ElementType::NONE)
+        return "";
+    if (type == ElementType::BEL)
+        return "BEL";
+    if (type == ElementType::WIRE)
+        return "WIRE";
+    if (type == ElementType::PIP)
+        return "PIP";
+    if (type == ElementType::NET)
+        return "NET";
+    if (type == ElementType::CELL)
+        return "CELL";
+    return "";
+}
+int DesignWidget::getElementIndex(ElementType type)
+{
+    if (type == ElementType::BEL)
+        return 0;
+    if (type == ElementType::WIRE)
+        return 1;
+    if (type == ElementType::PIP)
+        return 2;
+    if (type == ElementType::NET)
+        return 3;
+    if (type == ElementType::CELL)
+        return 4;
+    return -1;
+}
+
+ElementType DesignWidget::getElementTypeByName(QString type)
+{
+    if (type == "BEL")
+        return ElementType::BEL;
+    if (type == "WIRE")
+        return ElementType::WIRE;
+    if (type == "PIP")
+        return ElementType::PIP;
+    if (type == "NET")
+        return ElementType::NET;
+    if (type == "CELL")
+        return ElementType::CELL;
+    return ElementType::NONE;
+}
+
+void DesignWidget::addProperty(QtProperty *topItem, int propertyType, const QString &name, QVariant value,
+                               const ElementType &type)
+{
+    QtVariantProperty *item = readOnlyManager->addProperty(propertyType, name);
+    item->setValue(value);
+    item->setPropertyId(getElementTypeName(type));
+    topItem->addSubProperty(item);
+}
+
+QtProperty *DesignWidget::addSubGroup(QtProperty *topItem, const QString &name)
+{
+    QtProperty *item = groupManager->addProperty(name);
+    topItem->addSubProperty(item);
+    return item;
+}
+
+void DesignWidget::onItemSelectionChanged()
+{
+    if (treeWidget->selectedItems().size() == 0)
+        return;
+
+    QTreeWidgetItem *clickItem = treeWidget->selectedItems().at(0);
+
     if (!clickItem->parent())
         return;
 
@@ -276,305 +472,193 @@ void DesignWidget::onItemClicked(QTreeWidgetItem *clickItem, int pos)
         return;
     }
 
+    std::vector<DecalXY> decals;
+
+    addToHistory(clickItem);
+
     clearProperties();
     if (type == ElementType::BEL) {
         IdString c = static_cast<IdStringTreeItem *>(clickItem)->getData();
         BelId bel = ctx->getBelByName(c);
 
-        QtProperty *topItem = groupManager->addProperty("Bel");
-        addProperty(topItem, "Bel");
+        decals.push_back(ctx->getBelDecal(bel));
+        Q_EMIT selected(decals);
 
-        QtVariantProperty *nameItem = readOnlyManager->addProperty(QVariant::String, "Name");
-        nameItem->setValue(c.c_str(ctx));
-        topItem->addSubProperty(nameItem);
+        QtProperty *topItem = addTopLevelProperty("Bel");
 
-        QtVariantProperty *typeItem = readOnlyManager->addProperty(QVariant::String, "Type");
-        typeItem->setValue(ctx->belTypeToId(ctx->getBelType(bel)).c_str(ctx));
-        topItem->addSubProperty(typeItem);
-
-        QtVariantProperty *availItem = readOnlyManager->addProperty(QVariant::Bool, "Available");
-        availItem->setValue(ctx->checkBelAvail(bel));
-        topItem->addSubProperty(availItem);
-
-        QtVariantProperty *cellItem = readOnlyManager->addProperty(QVariant::String, "Bound Cell");
-        cellItem->setValue(ctx->getBoundBelCell(bel).c_str(ctx));
-        topItem->addSubProperty(cellItem);
-
-        QtVariantProperty *conflictItem = readOnlyManager->addProperty(QVariant::String, "Conflicting Cell");
-        conflictItem->setValue(ctx->getConflictingBelCell(bel).c_str(ctx));
-        topItem->addSubProperty(conflictItem);
+        addProperty(topItem, QVariant::String, "Name", c.c_str(ctx));
+        addProperty(topItem, QVariant::String, "Type", ctx->belTypeToId(ctx->getBelType(bel)).c_str(ctx));
+        addProperty(topItem, QVariant::Bool, "Available", ctx->checkBelAvail(bel));
+        addProperty(topItem, QVariant::String, "Bound Cell", ctx->getBoundBelCell(bel).c_str(ctx), ElementType::CELL);
+        addProperty(topItem, QVariant::String, "Conflicting Cell", ctx->getConflictingBelCell(bel).c_str(ctx),
+                    ElementType::CELL);
 
     } else if (type == ElementType::WIRE) {
         IdString c = static_cast<IdStringTreeItem *>(clickItem)->getData();
         WireId wire = ctx->getWireByName(c);
 
-        QtProperty *topItem = groupManager->addProperty("Wire");
-        addProperty(topItem, "Wire");
+        decals.push_back(ctx->getWireDecal(wire));
+        Q_EMIT selected(decals);
 
-        QtVariantProperty *nameItem = readOnlyManager->addProperty(QVariant::String, "Name");
-        nameItem->setValue(c.c_str(ctx));
-        topItem->addSubProperty(nameItem);
+        QtProperty *topItem = addTopLevelProperty("Wire");
 
-        QtVariantProperty *availItem = readOnlyManager->addProperty(QVariant::Bool, "Available");
-        availItem->setValue(ctx->checkWireAvail(wire));
-        topItem->addSubProperty(availItem);
-
-        QtVariantProperty *cellItem = readOnlyManager->addProperty(QVariant::String, "Bound Net");
-        cellItem->setValue(ctx->getBoundWireNet(wire).c_str(ctx));
-        topItem->addSubProperty(cellItem);
-
-        QtVariantProperty *conflictItem = readOnlyManager->addProperty(QVariant::String, "Conflicting Net");
-        conflictItem->setValue(ctx->getConflictingWireNet(wire).c_str(ctx));
-        topItem->addSubProperty(conflictItem);
+        addProperty(topItem, QVariant::String, "Name", c.c_str(ctx));
+        addProperty(topItem, QVariant::Bool, "Available", ctx->checkWireAvail(wire));
+        addProperty(topItem, QVariant::String, "Bound Net", ctx->getBoundWireNet(wire).c_str(ctx), ElementType::NET);
+        addProperty(topItem, QVariant::String, "Conflicting Net", ctx->getConflictingWireNet(wire).c_str(ctx),
+                    ElementType::NET);
 
+        QtProperty *belpinItem = addSubGroup(topItem, "BelPin Uphill");
         BelPin uphill = ctx->getBelPinUphill(wire);
-        QtProperty *belpinItem = groupManager->addProperty("BelPin Uphill");
-        topItem->addSubProperty(belpinItem);
-
-        QtVariantProperty *belUphillItem = readOnlyManager->addProperty(QVariant::String, "Bel");
         if (uphill.bel != BelId())
-            belUphillItem->setValue(ctx->getBelName(uphill.bel).c_str(ctx));
+            addProperty(belpinItem, QVariant::String, "Bel", ctx->getBelName(uphill.bel).c_str(ctx), ElementType::BEL);
         else
-            belUphillItem->setValue("");
-        belpinItem->addSubProperty(belUphillItem);
+            addProperty(belpinItem, QVariant::String, "Bel", "", ElementType::BEL);
 
-        QtVariantProperty *portUphillItem = readOnlyManager->addProperty(QVariant::String, "PortPin");
-        portUphillItem->setValue(ctx->portPinToId(uphill.pin).c_str(ctx));
-        belpinItem->addSubProperty(portUphillItem);
+        addProperty(belpinItem, QVariant::String, "PortPin", ctx->portPinToId(uphill.pin).c_str(ctx), ElementType::BEL);
 
-        QtProperty *downhillItem = groupManager->addProperty("BelPins Downhill");
-        topItem->addSubProperty(downhillItem);
+        QtProperty *downhillItem = addSubGroup(topItem, "BelPin Downhill");
         for (const auto &item : ctx->getBelPinsDownhill(wire)) {
             QString belname = "";
             if (item.bel != BelId())
                 belname = ctx->getBelName(item.bel).c_str(ctx);
             QString pinname = ctx->portPinToId(item.pin).c_str(ctx);
 
-            QtProperty *dhItem = groupManager->addProperty(belname + "-" + pinname);
-            downhillItem->addSubProperty(dhItem);
-
-            QtVariantProperty *belItem = readOnlyManager->addProperty(QVariant::String, "Bel");
-            belItem->setValue(belname);
-            dhItem->addSubProperty(belItem);
-
-            QtVariantProperty *portItem = readOnlyManager->addProperty(QVariant::String, "PortPin");
-            portItem->setValue(pinname);
-            dhItem->addSubProperty(portItem);
+            QtProperty *dhItem = addSubGroup(downhillItem, belname + "-" + pinname);
+            addProperty(dhItem, QVariant::String, "Bel", belname, ElementType::BEL);
+            addProperty(dhItem, QVariant::String, "PortPin", pinname);
         }
 
-        QtProperty *pipsDownItem = groupManager->addProperty("Pips Downhill");
-        topItem->addSubProperty(pipsDownItem);
+        int counter = 0;
+        QtProperty *pipsDownItem = addSubGroup(downhillItem, "Pips Downhill");
         for (const auto &item : ctx->getPipsDownhill(wire)) {
-            QtVariantProperty *pipItem = readOnlyManager->addProperty(QVariant::String, "");
-            pipItem->setValue(ctx->getPipName(item).c_str(ctx));
-            pipsDownItem->addSubProperty(pipItem);
+            addProperty(pipsDownItem, QVariant::String, "", ctx->getPipName(item).c_str(ctx), ElementType::PIP);
+            counter++;
+            if (counter == 50) {
+                addProperty(pipsDownItem, QVariant::String, "Warning", "Too many items...", ElementType::NONE);
+                break;
+            }
         }
 
-        QtProperty *pipsUpItem = groupManager->addProperty("Pips Uphill");
-        topItem->addSubProperty(pipsUpItem);
+        counter = 0;
+        QtProperty *pipsUpItem = addSubGroup(downhillItem, "Pips Uphill");
         for (const auto &item : ctx->getPipsUphill(wire)) {
-            QtVariantProperty *pipItem = readOnlyManager->addProperty(QVariant::String, "");
-            pipItem->setValue(ctx->getPipName(item).c_str(ctx));
-            pipsUpItem->addSubProperty(pipItem);
+            addProperty(pipsUpItem, QVariant::String, "", ctx->getPipName(item).c_str(ctx), ElementType::PIP);
+            counter++;
+            if (counter == 50) {
+                addProperty(pipsUpItem, QVariant::String, "Warning", "Too many items...", ElementType::NONE);
+                break;
+            }
         }
-
     } else if (type == ElementType::PIP) {
         IdString c = static_cast<IdStringTreeItem *>(clickItem)->getData();
         PipId pip = ctx->getPipByName(c);
 
-        QtProperty *topItem = groupManager->addProperty("Pip");
-        addProperty(topItem, "Pip");
+        decals.push_back(ctx->getPipDecal(pip));
+        Q_EMIT selected(decals);
 
-        QtVariantProperty *nameItem = readOnlyManager->addProperty(QVariant::String, "Name");
-        nameItem->setValue(c.c_str(ctx));
-        topItem->addSubProperty(nameItem);
+        QtProperty *topItem = addTopLevelProperty("Pip");
 
-        QtVariantProperty *availItem = readOnlyManager->addProperty(QVariant::Bool, "Available");
-        availItem->setValue(ctx->checkPipAvail(pip));
-        topItem->addSubProperty(availItem);
-
-        QtVariantProperty *cellItem = readOnlyManager->addProperty(QVariant::String, "Bound Net");
-        cellItem->setValue(ctx->getBoundPipNet(pip).c_str(ctx));
-        topItem->addSubProperty(cellItem);
-
-        QtVariantProperty *conflictItem = readOnlyManager->addProperty(QVariant::String, "Conflicting Net");
-        conflictItem->setValue(ctx->getConflictingPipNet(pip).c_str(ctx));
-        topItem->addSubProperty(conflictItem);
-
-        QtVariantProperty *srcWireItem = readOnlyManager->addProperty(QVariant::String, "Src Wire");
-        srcWireItem->setValue(ctx->getWireName(ctx->getPipSrcWire(pip)).c_str(ctx));
-        topItem->addSubProperty(srcWireItem);
-
-        QtVariantProperty *destWireItem = readOnlyManager->addProperty(QVariant::String, "Dest Wire");
-        destWireItem->setValue(ctx->getWireName(ctx->getPipDstWire(pip)).c_str(ctx));
-        topItem->addSubProperty(destWireItem);
+        addProperty(topItem, QVariant::String, "Name", c.c_str(ctx));
+        addProperty(topItem, QVariant::Bool, "Available", ctx->checkPipAvail(pip));
+        addProperty(topItem, QVariant::String, "Bound Net", ctx->getBoundPipNet(pip).c_str(ctx), ElementType::NET);
+        addProperty(topItem, QVariant::String, "Conflicting Net", ctx->getConflictingPipNet(pip).c_str(ctx),
+                    ElementType::NET);
+        addProperty(topItem, QVariant::String, "Src Wire", ctx->getWireName(ctx->getPipSrcWire(pip)).c_str(ctx),
+                    ElementType::WIRE);
+        addProperty(topItem, QVariant::String, "Dest Wire", ctx->getWireName(ctx->getPipDstWire(pip)).c_str(ctx),
+                    ElementType::WIRE);
 
         DelayInfo delay = ctx->getPipDelay(pip);
-        QtProperty *delayItem = groupManager->addProperty("Delay");
-        topItem->addSubProperty(delayItem);
-
-        QtVariantProperty *raiseDelayItem = readOnlyManager->addProperty(QVariant::Double, "Raise");
-        raiseDelayItem->setValue(delay.raiseDelay());
-        delayItem->addSubProperty(raiseDelayItem);
-
-        QtVariantProperty *fallDelayItem = readOnlyManager->addProperty(QVariant::Double, "Fall");
-        fallDelayItem->setValue(delay.fallDelay());
-        delayItem->addSubProperty(fallDelayItem);
-
-        QtVariantProperty *avgDelayItem = readOnlyManager->addProperty(QVariant::Double, "Average");
-        avgDelayItem->setValue(delay.avgDelay());
-        delayItem->addSubProperty(avgDelayItem);
 
+        QtProperty *delayItem = addSubGroup(topItem, "Delay");
+        addProperty(delayItem, QVariant::Double, "Raise", delay.raiseDelay());
+        addProperty(delayItem, QVariant::Double, "Fall", delay.fallDelay());
+        addProperty(delayItem, QVariant::Double, "Average", delay.avgDelay());
     } else if (type == ElementType::NET) {
         IdString c = static_cast<IdStringTreeItem *>(clickItem)->getData();
         NetInfo *net = ctx->nets.at(c).get();
 
-        QtProperty *topItem = groupManager->addProperty("Net");
-        addProperty(topItem, "Net");
+        QtProperty *topItem = addTopLevelProperty("Net");
 
-        QtVariantProperty *nameItem = readOnlyManager->addProperty(QVariant::String, "Name");
-        nameItem->setValue(net->name.c_str(ctx));
-        topItem->addSubProperty(nameItem);
+        addProperty(topItem, QVariant::String, "Name", net->name.c_str(ctx));
 
-        QtProperty *driverItem = groupManager->addProperty("Driver");
-        topItem->addSubProperty(driverItem);
-
-        QtVariantProperty *portItem = readOnlyManager->addProperty(QVariant::String, "Port");
-        portItem->setValue(net->driver.port.c_str(ctx));
-        driverItem->addSubProperty(portItem);
-
-        QtVariantProperty *budgetItem = readOnlyManager->addProperty(QVariant::Double, "Budget");
-        budgetItem->setValue(net->driver.budget);
-        driverItem->addSubProperty(budgetItem);
-
-        QtVariantProperty *cellNameItem = readOnlyManager->addProperty(QVariant::String, "Cell");
+        QtProperty *driverItem = addSubGroup(topItem, "Driver");
+        addProperty(driverItem, QVariant::String, "Port", net->driver.port.c_str(ctx));
+        addProperty(driverItem, QVariant::Double, "Budget", net->driver.budget);
         if (net->driver.cell)
-            cellNameItem->setValue(net->driver.cell->name.c_str(ctx));
+            addProperty(driverItem, QVariant::String, "Cell", net->driver.cell->name.c_str(ctx), ElementType::CELL);
         else
-            cellNameItem->setValue("");
-        driverItem->addSubProperty(cellNameItem);
+            addProperty(driverItem, QVariant::String, "Cell", "", ElementType::CELL);
 
-        QtProperty *usersItem = groupManager->addProperty("Users");
-        topItem->addSubProperty(usersItem);
+        QtProperty *usersItem = addSubGroup(topItem, "Users");
         for (auto &item : net->users) {
-            QtProperty *portItem = groupManager->addProperty(item.port.c_str(ctx));
-            usersItem->addSubProperty(portItem);
+            QtProperty *portItem = addSubGroup(usersItem, item.port.c_str(ctx));
 
-            QtVariantProperty *nameItem = readOnlyManager->addProperty(QVariant::String, "Port");
-            nameItem->setValue(item.port.c_str(ctx));
-            portItem->addSubProperty(nameItem);
-
-            QtVariantProperty *budgetItem = readOnlyManager->addProperty(QVariant::Double, "Budget");
-            budgetItem->setValue(item.budget);
-            portItem->addSubProperty(budgetItem);
-
-            QtVariantProperty *userItem = readOnlyManager->addProperty(QVariant::String, "Cell");
+            addProperty(portItem, QVariant::String, "Port", item.port.c_str(ctx));
+            addProperty(portItem, QVariant::Double, "Budget", item.budget);
             if (item.cell)
-                userItem->setValue(item.cell->name.c_str(ctx));
+                addProperty(portItem, QVariant::String, "Cell", item.cell->name.c_str(ctx), ElementType::CELL);
             else
-                userItem->setValue("");
-            portItem->addSubProperty(userItem);
+                addProperty(portItem, QVariant::String, "Cell", "", ElementType::CELL);
         }
 
-        QtProperty *attrsItem = groupManager->addProperty("Attributes");
-        topItem->addSubProperty(attrsItem);
+        QtProperty *attrsItem = addSubGroup(topItem, "Attributes");
         for (auto &item : net->attrs) {
-            QtVariantProperty *attrItem = readOnlyManager->addProperty(QVariant::String, item.first.c_str(ctx));
-            attrItem->setValue(item.second.c_str());
-            attrsItem->addSubProperty(attrItem);
+            addProperty(attrsItem, QVariant::String, item.first.c_str(ctx), item.second.c_str());
         }
 
-        QtProperty *wiresItem = groupManager->addProperty("Wires");
-        topItem->addSubProperty(wiresItem);
+        QtProperty *wiresItem = addSubGroup(topItem, "Wires");
         for (auto &item : net->wires) {
             auto name = ctx->getWireName(item.first).c_str(ctx);
 
-            QtProperty *wireItem = groupManager->addProperty(name);
-
-            QtVariantProperty *nameItem = readOnlyManager->addProperty(QVariant::String, "Name");
-            nameItem->setValue(name);
-            wireItem->addSubProperty(nameItem);
-
-            QtVariantProperty *pipItem = readOnlyManager->addProperty(QVariant::String, "Pip");
+            QtProperty *wireItem = addSubGroup(wiresItem, name);
+            addProperty(wireItem, QVariant::String, "Name", name);
 
             if (item.second.pip != PipId())
-                pipItem->setValue(ctx->getPipName(item.second.pip).c_str(ctx));
+                addProperty(wireItem, QVariant::String, "Pip", ctx->getPipName(item.second.pip).c_str(ctx),
+                            ElementType::PIP);
             else
-                pipItem->setValue("");
-            wireItem->addSubProperty(pipItem);
+                addProperty(wireItem, QVariant::String, "Pip", "", ElementType::PIP);
 
-            QtVariantProperty *strengthItem = readOnlyManager->addProperty(QVariant::Int, "Strength");
-            strengthItem->setValue((int)item.second.strength);
-            wireItem->addSubProperty(strengthItem);
-
-            wiresItem->addSubProperty(wireItem);
+            addProperty(wireItem, QVariant::Int, "Strength", (int)item.second.strength);
         }
 
     } else if (type == ElementType::CELL) {
         IdString c = static_cast<IdStringTreeItem *>(clickItem)->getData();
         CellInfo *cell = ctx->cells.at(c).get();
 
-        QtProperty *topItem = groupManager->addProperty("Cell");
-        addProperty(topItem, "Cell");
+        QtProperty *topItem = addTopLevelProperty("Cell");
 
-        QtVariantProperty *cellNameItem = readOnlyManager->addProperty(QVariant::String, "Name");
-        cellNameItem->setValue(cell->name.c_str(ctx));
-        topItem->addSubProperty(cellNameItem);
-
-        QtVariantProperty *cellTypeItem = readOnlyManager->addProperty(QVariant::String, "Type");
-        cellTypeItem->setValue(cell->type.c_str(ctx));
-        topItem->addSubProperty(cellTypeItem);
-
-        QtVariantProperty *cellBelItem = readOnlyManager->addProperty(QVariant::String, "Bel");
+        addProperty(topItem, QVariant::String, "Name", cell->name.c_str(ctx));
+        addProperty(topItem, QVariant::String, "Type", cell->type.c_str(ctx));
         if (cell->bel != BelId())
-            cellBelItem->setValue(ctx->getBelName(cell->bel).c_str(ctx));
+            addProperty(topItem, QVariant::String, "Bel", ctx->getBelName(cell->bel).c_str(ctx), ElementType::BEL);
         else
-            cellBelItem->setValue("");
-        topItem->addSubProperty(cellBelItem);
+            addProperty(topItem, QVariant::String, "Bel", "", ElementType::BEL);
+        addProperty(topItem, QVariant::Int, "Bel strength", int(cell->belStrength));
 
-        QtVariantProperty *cellBelStrItem = readOnlyManager->addProperty(QVariant::Int, "Bel strength");
-        cellBelStrItem->setValue(int(cell->belStrength));
-        topItem->addSubProperty(cellBelStrItem);
-
-        QtProperty *cellPortsItem = groupManager->addProperty("Ports");
-        topItem->addSubProperty(cellPortsItem);
+        QtProperty *cellPortsItem = addSubGroup(topItem, "Ports");
         for (auto &item : cell->ports) {
             PortInfo p = item.second;
 
-            QtProperty *portInfoItem = groupManager->addProperty(p.name.c_str(ctx));
-
-            QtVariantProperty *portInfoNameItem = readOnlyManager->addProperty(QVariant::String, "Name");
-            portInfoNameItem->setValue(p.name.c_str(ctx));
-            portInfoItem->addSubProperty(portInfoNameItem);
-
-            QtVariantProperty *portInfoTypeItem = readOnlyManager->addProperty(QVariant::Int, "Type");
-            portInfoTypeItem->setValue(int(p.type));
-            portInfoItem->addSubProperty(portInfoTypeItem);
-
-            QtVariantProperty *portInfoNetItem = readOnlyManager->addProperty(QVariant::String, "Net");
+            QtProperty *portInfoItem = addSubGroup(cellPortsItem, p.name.c_str(ctx));
+            addProperty(portInfoItem, QVariant::String, "Name", p.name.c_str(ctx));
+            addProperty(portInfoItem, QVariant::Int, "Type", int(p.type));
             if (p.net)
-                portInfoNetItem->setValue(p.net->name.c_str(ctx));
+                addProperty(portInfoItem, QVariant::String, "Net", p.net->name.c_str(ctx), ElementType::NET);
             else
-                portInfoNetItem->setValue("");
-            portInfoItem->addSubProperty(portInfoNetItem);
-
-            cellPortsItem->addSubProperty(portInfoItem);
+                addProperty(portInfoItem, QVariant::String, "Net", "", ElementType::NET);
         }
 
-        QtProperty *cellAttrItem = groupManager->addProperty("Attributes");
-        topItem->addSubProperty(cellAttrItem);
+        QtProperty *cellAttrItem = addSubGroup(topItem, "Attributes");
         for (auto &item : cell->attrs) {
-            QtVariantProperty *attrItem = readOnlyManager->addProperty(QVariant::String, item.first.c_str(ctx));
-            attrItem->setValue(item.second.c_str());
-            cellAttrItem->addSubProperty(attrItem);
+            addProperty(cellAttrItem, QVariant::String, item.first.c_str(ctx), item.second.c_str());
         }
 
-        QtProperty *cellParamsItem = groupManager->addProperty("Parameters");
-        topItem->addSubProperty(cellParamsItem);
+        QtProperty *cellParamsItem = addSubGroup(topItem, "Parameters");
         for (auto &item : cell->params) {
-            QtVariantProperty *paramItem = readOnlyManager->addProperty(QVariant::String, item.first.c_str(ctx));
-            paramItem->setValue(item.second.c_str());
-            cellParamsItem->addSubProperty(paramItem);
+            addProperty(cellParamsItem, QVariant::String, item.first.c_str(ctx), item.second.c_str());
         }
 
         QtProperty *cellPinsItem = groupManager->addProperty("Pins");
@@ -583,38 +667,159 @@ void DesignWidget::onItemClicked(QTreeWidgetItem *clickItem, int pos)
             std::string cell_port = item.first.c_str(ctx);
             std::string bel_pin = item.second.c_str(ctx);
 
-            QtProperty *pinGroupItem = groupManager->addProperty((cell_port + " -> " + bel_pin).c_str());
+            QtProperty *pinGroupItem = addSubGroup(cellPortsItem, (cell_port + " -> " + bel_pin).c_str());
 
-            QtVariantProperty *cellItem = readOnlyManager->addProperty(QVariant::String, "Cell");
-            cellItem->setValue(cell_port.c_str());
-            pinGroupItem->addSubProperty(cellItem);
-
-            QtVariantProperty *belItem = readOnlyManager->addProperty(QVariant::String, "Bel");
-            belItem->setValue(bel_pin.c_str());
-            pinGroupItem->addSubProperty(belItem);
-
-            cellPinsItem->addSubProperty(pinGroupItem);
+            addProperty(pinGroupItem, QVariant::String, "Cell", cell_port.c_str(), ElementType::CELL);
+            addProperty(pinGroupItem, QVariant::String, "Bel", bel_pin.c_str(), ElementType::BEL);
         }
     }
 }
 
-void DesignWidget::prepareMenu(const QPoint &pos)
+std::vector<DecalXY> DesignWidget::getDecals(ElementType type, IdString value)
+{
+    std::vector<DecalXY> decals;
+    switch (type) {
+    case ElementType::BEL: {
+        BelId bel = ctx->getBelByName(value);
+        if (bel != BelId()) {
+            decals.push_back(ctx->getBelDecal(bel));
+        }
+    } break;
+    case ElementType::WIRE: {
+        WireId wire = ctx->getWireByName(value);
+        if (wire != WireId()) {
+            decals.push_back(ctx->getWireDecal(wire));
+            Q_EMIT selected(decals);
+        }
+    } break;
+    case ElementType::PIP: {
+        PipId pip = ctx->getPipByName(value);
+        if (pip != PipId()) {
+            decals.push_back(ctx->getPipDecal(pip));
+            Q_EMIT selected(decals);
+        }
+    } break;
+    case ElementType::NET: {
+    } break;
+    case ElementType::CELL: {
+    } break;
+    default:
+        break;
+    }
+    return decals;
+}
+
+void DesignWidget::updateHighlightGroup(QTreeWidgetItem *item, int group)
+{
+    if (highlightSelected.contains(item)) {
+        if (highlightSelected[item] == group) {
+            highlightSelected.remove(item);
+        } else
+            highlightSelected[item] = group;
+    } else
+        highlightSelected.insert(item, group);
+
+    std::vector<DecalXY> decals;
+
+    for (auto it : highlightSelected.toStdMap()) {
+        if (it.second == group) {
+            ElementType type = static_cast<ElementTreeItem *>(it.first)->getType();
+            IdString value = static_cast<IdStringTreeItem *>(it.first)->getData();
+            std::vector<DecalXY> d = getDecals(type, value);
+            std::move(d.begin(), d.end(), std::back_inserter(decals));
+        }
+    }
+
+    Q_EMIT highlight(decals, group);
+}
+
+void DesignWidget::prepareMenuProperty(const QPoint &pos)
+{
+    QTreeWidget *tree = propertyEditor->treeWidget();
+
+    itemContextMenu = tree->itemAt(pos);
+    if (itemContextMenu->parent() == nullptr)
+        return;
+
+    QtBrowserItem *browserItem = propertyEditor->itemToBrowserItem(itemContextMenu);
+    if (!browserItem)
+        return;
+    QtProperty *selectedProperty = browserItem->property();
+    ElementType type = getElementTypeByName(selectedProperty->propertyId());
+    if (type == ElementType::NONE)
+        return;
+    IdString value = ctx->id(selectedProperty->valueText().toStdString());
+
+    QTreeWidgetItem *item = nameToItem[getElementIndex(type)].value(value.c_str(ctx));
+
+    QMenu menu(this);
+    QAction *selectAction = new QAction("&Select", this);
+    connect(selectAction, &QAction::triggered, this, [this, type, value] { Q_EMIT selected(getDecals(type, value)); });
+    menu.addAction(selectAction);
+
+    QMenu *subMenu = menu.addMenu("Highlight");
+    QActionGroup *group = new QActionGroup(this);
+    group->setExclusive(true);
+    for (int i = 0; i < 8; i++) {
+        QPixmap pixmap(32, 32);
+        pixmap.fill(QColor(highlightColors[i]));
+        QAction *action = new QAction(QIcon(pixmap), ("Group " + std::to_string(i)).c_str(), this);
+        action->setCheckable(true);
+        subMenu->addAction(action);
+        group->addAction(action);
+        if (highlightSelected.contains(item) && highlightSelected[item] == i)
+            action->setChecked(true);
+        connect(action, &QAction::triggered, this, [this, i, item] { updateHighlightGroup(item, i); });
+    }
+    menu.exec(tree->mapToGlobal(pos));
+}
+
+void DesignWidget::prepareMenuTree(const QPoint &pos)
 {
     QTreeWidget *tree = treeWidget;
 
     itemContextMenu = tree->itemAt(pos);
 
-    QAction *selectAction = new QAction("&Select", this);
-    selectAction->setStatusTip("Select item on view");
+    ElementType type = static_cast<ElementTreeItem *>(itemContextMenu)->getType();
+    IdString value = static_cast<IdStringTreeItem *>(itemContextMenu)->getData();
 
-    connect(selectAction, SIGNAL(triggered()), this, SLOT(selectObject()));
+    if (type == ElementType::NONE)
+        return;
+
+    QTreeWidgetItem *item = nameToItem[getElementIndex(type)].value(value.c_str(ctx));
 
     QMenu menu(this);
-    menu.addAction(selectAction);
-
+    QMenu *subMenu = menu.addMenu("Highlight");
+    QActionGroup *group = new QActionGroup(this);
+    group->setExclusive(true);
+    for (int i = 0; i < 8; i++) {
+        QPixmap pixmap(32, 32);
+        pixmap.fill(QColor(highlightColors[i]));
+        QAction *action = new QAction(QIcon(pixmap), ("Group " + std::to_string(i)).c_str(), this);
+        action->setCheckable(true);
+        subMenu->addAction(action);
+        group->addAction(action);
+        if (highlightSelected.contains(item) && highlightSelected[item] == i)
+            action->setChecked(true);
+        connect(action, &QAction::triggered, this, [this, i, item] { updateHighlightGroup(item, i); });
+    }
     menu.exec(tree->mapToGlobal(pos));
 }
 
-void DesignWidget::selectObject() { Q_EMIT info("selected " + itemContextMenu->text(0).toStdString() + "\n"); }
+void DesignWidget::onItemDoubleClicked(QTreeWidgetItem *item, int column)
+{
+    QtProperty *selectedProperty = propertyEditor->itemToBrowserItem(item)->property();
+    ElementType type = getElementTypeByName(selectedProperty->propertyId());
+    QString value = selectedProperty->valueText();
+    int index = getElementIndex(type);
+    switch (type) {
+    case ElementType::NONE:
+        return;
+    default: {
+        if (nameToItem[index].contains(value))
+            treeWidget->setCurrentItem(nameToItem[index].value(value));
+    } break;
+    }
+}
 
 NEXTPNR_NAMESPACE_END
diff --git a/gui/designwidget.h b/gui/designwidget.h
index 7785513a..1afe817d 100644
--- a/gui/designwidget.h
+++ b/gui/designwidget.h
@@ -21,6 +21,7 @@
 #define DESIGNWIDGET_H
 
 #include <QTreeWidget>
+#include <QVariant>
 #include "nextpnr.h"
 #include "qtgroupboxpropertybrowser.h"
 #include "qtpropertymanager.h"
@@ -29,6 +30,16 @@
 
 NEXTPNR_NAMESPACE_BEGIN
 
+enum class ElementType
+{
+    NONE,
+    BEL,
+    WIRE,
+    PIP,
+    NET,
+    CELL
+};
+
 class DesignWidget : public QWidget
 {
     Q_OBJECT
@@ -38,16 +49,30 @@ class DesignWidget : public QWidget
     ~DesignWidget();
 
   private:
-    void addProperty(QtProperty *property, const QString &id);
     void clearProperties();
-
+    QtProperty *addTopLevelProperty(const QString &id);
+    QtProperty *addSubGroup(QtProperty *topItem, const QString &name);
+    void addProperty(QtProperty *topItem, int propertyType, const QString &name, QVariant value,
+                     const ElementType &type = ElementType::NONE);
+    QString getElementTypeName(ElementType type);
+    ElementType getElementTypeByName(QString type);
+    int getElementIndex(ElementType type);
+    void updateButtons();
+    void addToHistory(QTreeWidgetItem *item);
+    std::vector<DecalXY> getDecals(ElementType type, IdString value);
+    void updateHighlightGroup(QTreeWidgetItem *item, int group);
   Q_SIGNALS:
     void info(std::string text);
+    void selected(std::vector<DecalXY> decal);
+    void highlight(std::vector<DecalXY> decal, int group);
+    void finishContextLoad();
+    void contextLoadStatus(std::string text);
 
   private Q_SLOTS:
-    void prepareMenu(const QPoint &pos);
-    void onItemClicked(QTreeWidgetItem *item, int);
-    void selectObject();
+    void prepareMenuProperty(const QPoint &pos);
+    void prepareMenuTree(const QPoint &pos);
+    void onItemSelectionChanged();
+    void onItemDoubleClicked(QTreeWidgetItem *item, int column);
   public Q_SLOTS:
     void newContext(Context *ctx);
     void updateTree();
@@ -66,8 +91,22 @@ class DesignWidget : public QWidget
 
     QMap<QtProperty *, QString> propertyToId;
     QMap<QString, QtProperty *> idToProperty;
+
+    QMap<QString, QTreeWidgetItem *> nameToItem[6];
+    std::vector<QTreeWidgetItem *> history;
+    int history_index;
+    bool history_ignore;
+
     QTreeWidgetItem *nets_root;
     QTreeWidgetItem *cells_root;
+
+    QAction *actionFirst;
+    QAction *actionPrev;
+    QAction *actionNext;
+    QAction *actionLast;
+
+    QColor highlightColors[8];
+    QMap<QTreeWidgetItem *, int> highlightSelected;
 };
 
 NEXTPNR_NAMESPACE_END
diff --git a/gui/ecp5/family.cmake b/gui/ecp5/family.cmake
new file mode 100644
index 00000000..e69de29b
diff --git a/gui/ecp5/mainwindow.cc b/gui/ecp5/mainwindow.cc
new file mode 100644
index 00000000..1168a55c
--- /dev/null
+++ b/gui/ecp5/mainwindow.cc
@@ -0,0 +1,51 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Miodrag Milanovic <miodrag@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "mainwindow.h"
+
+static void initMainResource() { Q_INIT_RESOURCE(nextpnr); }
+
+NEXTPNR_NAMESPACE_BEGIN
+
+MainWindow::MainWindow(std::unique_ptr<Context> context, QWidget *parent) : BaseMainWindow(std::move(context), parent)
+{
+    initMainResource();
+
+    std::string title = "nextpnr-ecp5 - [EMPTY]";
+    setWindowTitle(title.c_str());
+
+    createMenu();
+    Q_EMIT contextChanged(ctx.get());
+}
+
+MainWindow::~MainWindow() {}
+
+void MainWindow::createMenu()
+{
+    QMenu *menu_Custom = new QMenu("&Generic", menuBar);
+    menuBar->addAction(menu_Custom->menuAction());
+}
+
+void MainWindow::new_proj() {}
+
+void MainWindow::open_proj() {}
+
+bool MainWindow::save_proj() { return false; }
+
+NEXTPNR_NAMESPACE_END
diff --git a/gui/ecp5/mainwindow.h b/gui/ecp5/mainwindow.h
new file mode 100644
index 00000000..e97bb4e7
--- /dev/null
+++ b/gui/ecp5/mainwindow.h
@@ -0,0 +1,46 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Miodrag Milanovic <miodrag@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include "../basewindow.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+class MainWindow : public BaseMainWindow
+{
+    Q_OBJECT
+
+  public:
+    explicit MainWindow(std::unique_ptr<Context> context, QWidget *parent = 0);
+    virtual ~MainWindow();
+
+  public:
+    void createMenu();
+
+  protected Q_SLOTS:
+    virtual void new_proj();
+    virtual void open_proj();
+    virtual bool save_proj();
+};
+
+NEXTPNR_NAMESPACE_END
+
+#endif // MAINWINDOW_H
diff --git a/gui/ecp5/nextpnr.qrc b/gui/ecp5/nextpnr.qrc
new file mode 100644
index 00000000..03585ec0
--- /dev/null
+++ b/gui/ecp5/nextpnr.qrc
@@ -0,0 +1,2 @@
+<RCC>
+</RCC>
diff --git a/gui/fpgaviewwidget.cc b/gui/fpgaviewwidget.cc
index 0c6b1a98..2d8d4cef 100644
--- a/gui/fpgaviewwidget.cc
+++ b/gui/fpgaviewwidget.cc
@@ -195,7 +195,7 @@ bool LineShader::compile(void)
     return true;
 }
 
-void LineShader::draw(const LineShaderData &line, const QMatrix4x4 &projection)
+void LineShader::draw(const LineShaderData &line, const QColor &color, float thickness, const QMatrix4x4 &projection)
 {
     auto gl = QOpenGLContext::currentContext()->functions();
     vao_.bind();
@@ -214,8 +214,8 @@ void LineShader::draw(const LineShaderData &line, const QMatrix4x4 &projection)
     buffers_.index.allocate(&line.indices[0], sizeof(GLuint) * line.indices.size());
 
     program_->setUniformValue(uniforms_.projection, projection);
-    program_->setUniformValue(uniforms_.thickness, line.thickness);
-    program_->setUniformValue(uniforms_.color, line.color.r, line.color.g, line.color.b, line.color.a);
+    program_->setUniformValue(uniforms_.thickness, thickness);
+    program_->setUniformValue(uniforms_.color, color.redF(), color.greenF(), color.blueF(), color.alphaF());
 
     buffers_.position.bind();
     program_->enableAttributeArray("position");
@@ -241,8 +241,27 @@ void LineShader::draw(const LineShaderData &line, const QMatrix4x4 &projection)
 }
 
 FPGAViewWidget::FPGAViewWidget(QWidget *parent)
-        : QOpenGLWidget(parent), moveX_(0), moveY_(0), zoom_(10.0f), lineShader_(this), ctx_(nullptr)
+        : QOpenGLWidget(parent), lineShader_(this), zoom_(500.f), ctx_(nullptr), selectedItemsChanged_(false)
 {
+    backgroundColor_ = QColor("#000000");
+    gridColor_ = QColor("#333");
+    gFrameColor_ = QColor("#d0d0d0");
+    gHiddenColor_ = QColor("#606060");
+    gInactiveColor_ = QColor("#303030");
+    gActiveColor_ = QColor("#f0f0f0");
+    gSelectedColor_ = QColor("#ff6600");
+    frameColor_ = QColor("#0066ba");
+    highlightColors[0] = QColor("#6495ed");
+    highlightColors[1] = QColor("#7fffd4");
+    highlightColors[2] = QColor("#98fb98");
+    highlightColors[3] = QColor("#ffd700");
+    highlightColors[4] = QColor("#cd5c5c");
+    highlightColors[5] = QColor("#fa8072");
+    highlightColors[6] = QColor("#ff69b4");
+    highlightColors[7] = QColor("#da70d6");
+    for (int i = 0; i < 8; i++)
+        highlightItemsChanged_[i] = false;
+
     auto fmt = format();
     fmt.setMajorVersion(3);
     fmt.setMinorVersion(1);
@@ -264,6 +283,7 @@ FPGAViewWidget::~FPGAViewWidget() {}
 void FPGAViewWidget::newContext(Context *ctx)
 {
     ctx_ = ctx;
+    selectedItems_.clear();
     update();
 }
 
@@ -271,66 +291,92 @@ QSize FPGAViewWidget::minimumSizeHint() const { return QSize(640, 480); }
 
 QSize FPGAViewWidget::sizeHint() const { return QSize(640, 480); }
 
-void FPGAViewWidget::setXTranslation(float t_x)
-{
-    if (t_x == moveX_)
-        return;
-
-    moveX_ = t_x;
-    update();
-}
-
-void FPGAViewWidget::setYTranslation(float t_y)
-{
-    if (t_y == moveY_)
-        return;
-
-    moveY_ = t_y;
-    update();
-}
-
-void FPGAViewWidget::setZoom(float t_z)
-{
-    if (t_z == zoom_)
-        return;
-    zoom_ = t_z;
-
-    if (zoom_ < 1.0f)
-        zoom_ = 1.0f;
-    if (zoom_ > 100.f)
-        zoom_ = 100.0f;
-
-    update();
-}
-
 void FPGAViewWidget::initializeGL()
 {
     if (!lineShader_.compile()) {
         log_error("Could not compile shader.\n");
     }
     initializeOpenGLFunctions();
-    glClearColor(1.0, 1.0, 1.0, 0.0);
+    glClearColor(backgroundColor_.red() / 255, backgroundColor_.green() / 255, backgroundColor_.blue() / 255, 0.0);
 }
 
-void FPGAViewWidget::drawElement(LineShaderData &out, const GraphicElement &el)
+void FPGAViewWidget::drawDecal(LineShaderData &out, const DecalXY &decal)
 {
-    const float scale = 1.0, offset = 0.0;
+    const float scale = 1.0;
+    float offsetX = 0.0, offsetY = 0.0;
 
-    if (el.type == GraphicElement::G_BOX) {
-        auto line = PolyLine(true);
-        line.point(offset + scale * el.x1, offset + scale * el.y1);
-        line.point(offset + scale * el.x2, offset + scale * el.y1);
-        line.point(offset + scale * el.x2, offset + scale * el.y2);
-        line.point(offset + scale * el.x1, offset + scale * el.y2);
-        line.build(out);
-    }
+    for (auto &el : ctx_->getDecalGraphics(decal.decal)) {
+        offsetX = decal.x;
+        offsetY = decal.y;
 
-    if (el.type == GraphicElement::G_LINE) {
-        PolyLine(offset + scale * el.x1, offset + scale * el.y1, offset + scale * el.x2, offset + scale * el.y2)
-                .build(out);
+        if (el.type == GraphicElement::G_BOX) {
+            auto line = PolyLine(true);
+            line.point(offsetX + scale * el.x1, offsetY + scale * el.y1);
+            line.point(offsetX + scale * el.x2, offsetY + scale * el.y1);
+            line.point(offsetX + scale * el.x2, offsetY + scale * el.y2);
+            line.point(offsetX + scale * el.x1, offsetY + scale * el.y2);
+            line.build(out);
+        }
+
+        if (el.type == GraphicElement::G_LINE) {
+            PolyLine(offsetX + scale * el.x1, offsetY + scale * el.y1, offsetX + scale * el.x2, offsetY + scale * el.y2)
+                    .build(out);
+        }
     }
 }
 
+void FPGAViewWidget::drawDecal(LineShaderData out[], const DecalXY &decal)
+{
+    const float scale = 1.0;
+    float offsetX = 0.0, offsetY = 0.0;
+
+    for (auto &el : ctx_->getDecalGraphics(decal.decal)) {
+        offsetX = decal.x;
+        offsetY = decal.y;
+
+        if (el.type == GraphicElement::G_BOX) {
+            auto line = PolyLine(true);
+            line.point(offsetX + scale * el.x1, offsetY + scale * el.y1);
+            line.point(offsetX + scale * el.x2, offsetY + scale * el.y1);
+            line.point(offsetX + scale * el.x2, offsetY + scale * el.y2);
+            line.point(offsetX + scale * el.x1, offsetY + scale * el.y2);
+            switch (el.style) {
+            case GraphicElement::G_FRAME:
+            case GraphicElement::G_INACTIVE:
+            case GraphicElement::G_ACTIVE:
+                line.build(out[el.style]);
+                break;
+            default:
+                break;
+            }
+        }
+
+        if (el.type == GraphicElement::G_LINE) {
+            auto line = PolyLine(offsetX + scale * el.x1, offsetY + scale * el.y1, offsetX + scale * el.x2,
+                                 offsetY + scale * el.y2);
+            switch (el.style) {
+            case GraphicElement::G_FRAME:
+            case GraphicElement::G_INACTIVE:
+            case GraphicElement::G_ACTIVE:
+                line.build(out[el.style]);
+                break;
+            default:
+                break;
+            }
+        }
+    }
+}
+
+QMatrix4x4 FPGAViewWidget::getProjection(void)
+{
+    QMatrix4x4 matrix;
+
+    const float aspect = float(width()) / float(height());
+    matrix.perspective(3.14 / 2, aspect, zoomNear_, zoomFar_);
+    matrix.translate(0.0f, 0.0f, -zoom_);
+    return matrix;
+}
+
 void FPGAViewWidget::paintGL()
 {
     auto gl = QOpenGLContext::currentContext()->functions();
@@ -338,65 +384,112 @@ void FPGAViewWidget::paintGL()
     gl->glViewport(0, 0, width() * retinaScale, height() * retinaScale);
     gl->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
-    const float aspect = float(width()) / float(height());
+    QMatrix4x4 matrix = getProjection();
 
-    QMatrix4x4 matrix;
-    matrix.ortho(QRectF(-aspect / 2.0, -0.5, aspect, 1.0f));
-    matrix.translate(moveX_, moveY_, -0.5);
-    matrix.scale(zoom_ * 0.01f, zoom_ * 0.01f, 0);
+    matrix *= viewMove_;
+
+    // Calculate world thickness to achieve a screen 1px/1.1px line.
+    float thick1Px = mouseToWorldCoordinates(1, 0).x();
+    float thick11Px = mouseToWorldCoordinates(1.1, 0).x();
 
     // Draw grid.
-    auto grid = LineShaderData(0.01f, QColor("#DDD"));
+    auto grid = LineShaderData();
     for (float i = -100.0f; i < 100.0f; i += 1.0f) {
         PolyLine(-100.0f, i, 100.0f, i).build(grid);
         PolyLine(i, -100.0f, i, 100.0f).build(grid);
     }
-    lineShader_.draw(grid, matrix);
+    lineShader_.draw(grid, gridColor_, thick1Px, matrix);
+
+    LineShaderData shaders[4] = {[GraphicElement::G_FRAME] = LineShaderData(),
+                                 [GraphicElement::G_HIDDEN] = LineShaderData(),
+                                 [GraphicElement::G_INACTIVE] = LineShaderData(),
+                                 [GraphicElement::G_ACTIVE] = LineShaderData()};
 
-    // Draw Bels.
-    auto bels = LineShaderData(0.02f, QColor("#b000ba"));
     if (ctx_) {
+        // Draw Bels.
         for (auto bel : ctx_->getBels()) {
-            for (auto &el : ctx_->getBelGraphics(bel))
-                drawElement(bels, el);
+            drawDecal(shaders, ctx_->getBelDecal(bel));
+        }
+        // Draw Wires.
+        for (auto wire : ctx_->getWires()) {
+            drawDecal(shaders, ctx_->getWireDecal(wire));
+        }
+        // Draw Pips.
+        for (auto pip : ctx_->getPips()) {
+            drawDecal(shaders, ctx_->getPipDecal(pip));
+        }
+        // Draw Groups.
+        for (auto group : ctx_->getGroups()) {
+            drawDecal(shaders, ctx_->getGroupDecal(group));
+        }
+
+        if (selectedItemsChanged_) {
+            selectedItemsChanged_ = false;
+            selectedShader_.clear();
+            for (auto decal : selectedItems_) {
+                drawDecal(selectedShader_, decal);
+            }
+        }
+        for (int i = 0; i < 8; i++) {
+            if (highlightItemsChanged_[i]) {
+                highlightItemsChanged_[i] = false;
+                highlightShader_[i].clear();
+                for (auto decal : highlightItems_[i]) {
+                    drawDecal(highlightShader_[i], decal);
+                }
+            }
         }
-        lineShader_.draw(bels, matrix);
     }
 
-    // Draw Frame Graphics.
-    auto frames = LineShaderData(0.02f, QColor("#0066ba"));
-    if (ctx_) {
-        for (auto &el : ctx_->getFrameGraphics()) {
-            drawElement(frames, el);
-        }
-        lineShader_.draw(frames, matrix);
-    }
+    lineShader_.draw(shaders[0], gFrameColor_, thick11Px, matrix);
+    lineShader_.draw(shaders[1], gHiddenColor_, thick11Px, matrix);
+    lineShader_.draw(shaders[2], gInactiveColor_, thick11Px, matrix);
+    lineShader_.draw(shaders[3], gActiveColor_, thick11Px, matrix);
+    for (int i = 0; i < 8; i++)
+        lineShader_.draw(highlightShader_[i], highlightColors[i], thick11Px, matrix);
+    lineShader_.draw(selectedShader_, gSelectedColor_, thick11Px, matrix);
+}
+
+void FPGAViewWidget::onSelectedArchItem(std::vector<DecalXY> decals)
+{
+    selectedItems_ = decals;
+    selectedItemsChanged_ = true;
+    update();
+}
+
+void FPGAViewWidget::onHighlightGroupChanged(std::vector<DecalXY> decals, int group)
+{
+    highlightItems_[group] = decals;
+    highlightItemsChanged_[group] = true;
+    update();
 }
 
 void FPGAViewWidget::resizeGL(int width, int height) {}
 
-void FPGAViewWidget::mousePressEvent(QMouseEvent *event)
+void FPGAViewWidget::mousePressEvent(QMouseEvent *event) { lastPos_ = event->pos(); }
+
+// Invert the projection matrix to calculate screen/mouse to world/grid
+// coordinates.
+QVector4D FPGAViewWidget::mouseToWorldCoordinates(int x, int y)
 {
-    startDragX_ = moveX_;
-    startDragY_ = moveY_;
-    lastPos_ = event->pos();
+    QMatrix4x4 p = getProjection();
+    QVector2D unit = p.map(QVector4D(1, 1, 0, 1)).toVector2DAffine();
+
+    float sx = (((float)x) / (width() / 2));
+    float sy = (((float)y) / (height() / 2));
+    return QVector4D(sx / unit.x(), sy / unit.y(), 0, 1);
 }
 
 void FPGAViewWidget::mouseMoveEvent(QMouseEvent *event)
 {
     const int dx = event->x() - lastPos_.x();
     const int dy = event->y() - lastPos_.y();
+    lastPos_ = event->pos();
 
-    const qreal retinaScale = devicePixelRatio();
-    float aspect = float(width()) / float(height());
-    const float dx_scale = dx * (1 / (float)width() * retinaScale * aspect);
-    const float dy_scale = dy * (1 / (float)height() * retinaScale);
+    auto world = mouseToWorldCoordinates(dx, dy);
+    viewMove_.translate(world.x(), -world.y());
 
-    float xpos = dx_scale + startDragX_;
-    float ypos = dy_scale + startDragY_;
-
-    setXTranslation(xpos);
-    setYTranslation(ypos);
+    update();
 }
 
 void FPGAViewWidget::wheelEvent(QWheelEvent *event)
@@ -404,8 +497,19 @@ void FPGAViewWidget::wheelEvent(QWheelEvent *event)
     QPoint degree = event->angleDelta() / 8;
 
     if (!degree.isNull()) {
-        float steps = degree.y() / 15.0;
-        setZoom(zoom_ + steps);
+
+        if (zoom_ < zoomNear_) {
+            zoom_ = zoomNear_;
+        } else if (zoom_ < zoomLvl1_) {
+            zoom_ -= degree.y() / 10.0;
+        } else if (zoom_ < zoomLvl2_) {
+            zoom_ -= degree.y() / 5.0;
+        } else if (zoom_ < zoomFar_) {
+            zoom_ -= degree.y();
+        } else {
+            zoom_ = zoomFar_;
+        }
+        update();
     }
 }
 
diff --git a/gui/fpgaviewwidget.h b/gui/fpgaviewwidget.h
index c281fd77..33eb2800 100644
--- a/gui/fpgaviewwidget.h
+++ b/gui/fpgaviewwidget.h
@@ -41,18 +41,6 @@ NPNR_PACKED_STRUCT(struct Vertex2DPOD {
     Vertex2DPOD(GLfloat X, GLfloat Y) : x(X), y(Y) {}
 });
 
-// Vertex2DPOD is a structure of R, G, B, A values that can be passed to OpenGL
-// directly.
-NPNR_PACKED_STRUCT(struct ColorPOD {
-    GLfloat r;
-    GLfloat g;
-    GLfloat b;
-    GLfloat a;
-
-    ColorPOD(GLfloat R, GLfloat G, GLfloat B, GLfloat A) : r(R), g(G), b(B), a(A) {}
-    ColorPOD(const QColor &color) : r(color.redF()), g(color.greenF()), b(color.blueF()), a(color.alphaF()) {}
-});
-
 // LineShaderData is a built set of vertices that can be rendered by the
 // LineShader.
 // Each LineShaderData can have its' own color and thickness.
@@ -63,10 +51,15 @@ struct LineShaderData
     std::vector<GLfloat> miters;
     std::vector<GLuint> indices;
 
-    GLfloat thickness;
-    ColorPOD color;
+    LineShaderData(void) {}
 
-    LineShaderData(GLfloat Thickness, QColor Color) : thickness(Thickness), color(Color) {}
+    void clear(void)
+    {
+        vertices.clear();
+        normals.clear();
+        miters.clear();
+        indices.clear();
+    }
 };
 
 // PolyLine is a set of segments defined by points, that can be built to a
@@ -210,12 +203,20 @@ class LineShader
     bool compile(void);
 
     // Render a LineShaderData with a given M/V/P transformation.
-    void draw(const LineShaderData &data, const QMatrix4x4 &projection);
+    void draw(const LineShaderData &data, const QColor &color, float thickness, const QMatrix4x4 &projection);
 };
 
 class FPGAViewWidget : public QOpenGLWidget, protected QOpenGLFunctions
 {
     Q_OBJECT
+    Q_PROPERTY(QColor backgroundColor MEMBER backgroundColor_ DESIGNABLE true)
+    Q_PROPERTY(QColor gridColor MEMBER gridColor_ DESIGNABLE true)
+    Q_PROPERTY(QColor gFrameColor MEMBER gFrameColor_ DESIGNABLE true)
+    Q_PROPERTY(QColor gHiddenColor MEMBER gHiddenColor_ DESIGNABLE true)
+    Q_PROPERTY(QColor gInactiveColor MEMBER gInactiveColor_ DESIGNABLE true)
+    Q_PROPERTY(QColor gActiveColor MEMBER gActiveColor_ DESIGNABLE true)
+    Q_PROPERTY(QColor gSelectedColor MEMBER gSelectedColor_ DESIGNABLE true)
+    Q_PROPERTY(QColor frameColor MEMBER frameColor_ DESIGNABLE true)
 
   public:
     FPGAViewWidget(QWidget *parent = 0);
@@ -239,20 +240,46 @@ class FPGAViewWidget : public QOpenGLWidget, protected QOpenGLFunctions
     void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
     void mouseMoveEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
     void wheelEvent(QWheelEvent *event) Q_DECL_OVERRIDE;
-    void drawElement(LineShaderData &data, const GraphicElement &el);
+    void drawDecal(LineShaderData &data, const DecalXY &decal);
+    void drawDecal(LineShaderData out[], const DecalXY &decal);
   public Q_SLOTS:
     void newContext(Context *ctx);
+    void onSelectedArchItem(std::vector<DecalXY> decals);
+    void onHighlightGroupChanged(std::vector<DecalXY> decals, int group);
 
   private:
     QPoint lastPos_;
-    float moveX_;
-    float moveY_;
-    float zoom_;
     LineShader lineShader_;
+    QMatrix4x4 viewMove_;
+    float zoom_;
+    QMatrix4x4 getProjection(void);
+    QVector4D mouseToWorldCoordinates(int x, int y);
+
+    const float zoomNear_ = 1.0f;    // do not zoom closer than this
+    const float zoomFar_ = 10000.0f; // do not zoom further than this
+
+    const float zoomLvl1_ = 100.0f;
+    const float zoomLvl2_ = 50.0f;
 
-    float startDragX_;
-    float startDragY_;
     Context *ctx_;
+
+    QColor backgroundColor_;
+    QColor gridColor_;
+    QColor gFrameColor_;
+    QColor gHiddenColor_;
+    QColor gInactiveColor_;
+    QColor gActiveColor_;
+    QColor gSelectedColor_;
+    QColor frameColor_;
+
+    LineShaderData selectedShader_;
+    std::vector<DecalXY> selectedItems_;
+    bool selectedItemsChanged_;
+
+    LineShaderData highlightShader_[8];
+    std::vector<DecalXY> highlightItems_[8];
+    bool highlightItemsChanged_[8];
+    QColor highlightColors[8];
 };
 
 NEXTPNR_NAMESPACE_END
diff --git a/gui/generic/family.cmake b/gui/generic/family.cmake
new file mode 100644
index 00000000..e69de29b
diff --git a/gui/generic/mainwindow.cc b/gui/generic/mainwindow.cc
index fef63094..88e291e6 100644
--- a/gui/generic/mainwindow.cc
+++ b/gui/generic/mainwindow.cc
@@ -23,7 +23,7 @@ static void initMainResource() { Q_INIT_RESOURCE(nextpnr); }
 
 NEXTPNR_NAMESPACE_BEGIN
 
-MainWindow::MainWindow(QWidget *parent) : BaseMainWindow(parent)
+MainWindow::MainWindow(std::unique_ptr<Context> context, QWidget *parent) : BaseMainWindow(std::move(context), parent)
 {
     initMainResource();
 
@@ -31,6 +31,7 @@ MainWindow::MainWindow(QWidget *parent) : BaseMainWindow(parent)
     setWindowTitle(title.c_str());
 
     createMenu();
+    Q_EMIT contextChanged(ctx.get());
 }
 
 MainWindow::~MainWindow() {}
diff --git a/gui/generic/mainwindow.h b/gui/generic/mainwindow.h
index fd9812cd..e97bb4e7 100644
--- a/gui/generic/mainwindow.h
+++ b/gui/generic/mainwindow.h
@@ -29,7 +29,7 @@ class MainWindow : public BaseMainWindow
     Q_OBJECT
 
   public:
-    explicit MainWindow(QWidget *parent = 0);
+    explicit MainWindow(std::unique_ptr<Context> context, QWidget *parent = 0);
     virtual ~MainWindow();
 
   public:
diff --git a/gui/ice40/family.cmake b/gui/ice40/family.cmake
new file mode 100644
index 00000000..ede5b805
--- /dev/null
+++ b/gui/ice40/family.cmake
@@ -0,0 +1,3 @@
+if(ICE40_HX1K_ONLY)
+    target_compile_definitions(gui_${family} PRIVATE ICE40_HX1K_ONLY=1)
+endif()
diff --git a/gui/ice40/mainwindow.cc b/gui/ice40/mainwindow.cc
index f423ee37..4b1f2c57 100644
--- a/gui/ice40/mainwindow.cc
+++ b/gui/ice40/mainwindow.cc
@@ -27,16 +27,14 @@
 #include "design_utils.h"
 #include "jsonparse.h"
 #include "log.h"
-#include "pack.h"
 #include "pcf.h"
-#include "place_sa.h"
-#include "route.h"
 
 static void initMainResource() { Q_INIT_RESOURCE(nextpnr); }
 
 NEXTPNR_NAMESPACE_BEGIN
 
-MainWindow::MainWindow(QWidget *parent) : BaseMainWindow(parent), timing_driven(false)
+MainWindow::MainWindow(std::unique_ptr<Context> context, ArchArgs args, QWidget *parent)
+        : BaseMainWindow(std::move(context), parent), timing_driven(false), chipArgs(args)
 {
     initMainResource();
 
@@ -62,6 +60,8 @@ MainWindow::MainWindow(QWidget *parent) : BaseMainWindow(parent), timing_driven(
     connect(this, SIGNAL(contextChanged(Context *)), task, SIGNAL(contextChanged(Context *)));
 
     createMenu();
+
+    Q_EMIT contextChanged(ctx.get());
 }
 
 MainWindow::~MainWindow() { delete task; }
@@ -72,60 +72,46 @@ void MainWindow::createMenu()
     menuBar->addAction(menu_Design->menuAction());
 
     actionLoadJSON = new QAction("Open JSON", this);
-    QIcon iconLoadJSON;
-    iconLoadJSON.addFile(QStringLiteral(":/icons/resources/open_json.png"));
-    actionLoadJSON->setIcon(iconLoadJSON);
+    actionLoadJSON->setIcon(QIcon(":/icons/resources/open_json.png"));
     actionLoadJSON->setStatusTip("Open an existing JSON file");
+    actionLoadJSON->setEnabled(true);
     connect(actionLoadJSON, SIGNAL(triggered()), this, SLOT(open_json()));
-    actionLoadJSON->setEnabled(false);
 
     actionLoadPCF = new QAction("Open PCF", this);
-    QIcon iconLoadPCF;
-    iconLoadPCF.addFile(QStringLiteral(":/icons/resources/open_pcf.png"));
-    actionLoadPCF->setIcon(iconLoadPCF);
+    actionLoadPCF->setIcon(QIcon(":/icons/resources/open_pcf.png"));
     actionLoadPCF->setStatusTip("Open PCF file");
-    connect(actionLoadPCF, SIGNAL(triggered()), this, SLOT(open_pcf()));
     actionLoadPCF->setEnabled(false);
+    connect(actionLoadPCF, SIGNAL(triggered()), this, SLOT(open_pcf()));
 
     actionPack = new QAction("Pack", this);
-    QIcon iconPack;
-    iconPack.addFile(QStringLiteral(":/icons/resources/pack.png"));
-    actionPack->setIcon(iconPack);
+    actionPack->setIcon(QIcon(":/icons/resources/pack.png"));
     actionPack->setStatusTip("Pack current design");
-    connect(actionPack, SIGNAL(triggered()), task, SIGNAL(pack()));
     actionPack->setEnabled(false);
+    connect(actionPack, SIGNAL(triggered()), task, SIGNAL(pack()));
 
     actionAssignBudget = new QAction("Assign Budget", this);
-    QIcon iconAssignBudget;
-    iconAssignBudget.addFile(QStringLiteral(":/icons/resources/time_add.png"));
-    actionAssignBudget->setIcon(iconAssignBudget);
+    actionAssignBudget->setIcon(QIcon(":/icons/resources/time_add.png"));
     actionAssignBudget->setStatusTip("Assign time budget for current design");
-    connect(actionAssignBudget, SIGNAL(triggered()), this, SLOT(budget()));
     actionAssignBudget->setEnabled(false);
+    connect(actionAssignBudget, SIGNAL(triggered()), this, SLOT(budget()));
 
     actionPlace = new QAction("Place", this);
-    QIcon iconPlace;
-    iconPlace.addFile(QStringLiteral(":/icons/resources/place.png"));
-    actionPlace->setIcon(iconPlace);
+    actionPlace->setIcon(QIcon(":/icons/resources/place.png"));
     actionPlace->setStatusTip("Place current design");
-    connect(actionPlace, SIGNAL(triggered()), this, SLOT(place()));
     actionPlace->setEnabled(false);
+    connect(actionPlace, SIGNAL(triggered()), this, SLOT(place()));
 
     actionRoute = new QAction("Route", this);
-    QIcon iconRoute;
-    iconRoute.addFile(QStringLiteral(":/icons/resources/route.png"));
-    actionRoute->setIcon(iconRoute);
+    actionRoute->setIcon(QIcon(":/icons/resources/route.png"));
     actionRoute->setStatusTip("Route current design");
-    connect(actionRoute, SIGNAL(triggered()), task, SIGNAL(route()));
     actionRoute->setEnabled(false);
+    connect(actionRoute, SIGNAL(triggered()), task, SIGNAL(route()));
 
     actionSaveAsc = new QAction("Save ASC", this);
-    QIcon iconSaveAsc;
-    iconSaveAsc.addFile(QStringLiteral(":/icons/resources/save_asc.png"));
-    actionSaveAsc->setIcon(iconSaveAsc);
+    actionSaveAsc->setIcon(QIcon(":/icons/resources/save_asc.png"));
     actionSaveAsc->setStatusTip("Save ASC file");
-    connect(actionSaveAsc, SIGNAL(triggered()), this, SLOT(save_asc()));
     actionSaveAsc->setEnabled(false);
+    connect(actionSaveAsc, SIGNAL(triggered()), this, SLOT(save_asc()));
 
     QToolBar *taskFPGABar = new QToolBar();
     addToolBar(Qt::TopToolBarArea, taskFPGABar);
@@ -147,28 +133,22 @@ void MainWindow::createMenu()
     menu_Design->addAction(actionSaveAsc);
 
     actionPlay = new QAction("Play", this);
-    QIcon iconPlay;
-    iconPlay.addFile(QStringLiteral(":/icons/resources/control_play.png"));
-    actionPlay->setIcon(iconPlay);
+    actionPlay->setIcon(QIcon(":/icons/resources/control_play.png"));
     actionPlay->setStatusTip("Continue running task");
-    connect(actionPlay, SIGNAL(triggered()), task, SLOT(continue_thread()));
     actionPlay->setEnabled(false);
+    connect(actionPlay, SIGNAL(triggered()), task, SLOT(continue_thread()));
 
     actionPause = new QAction("Pause", this);
-    QIcon iconPause;
-    iconPause.addFile(QStringLiteral(":/icons/resources/control_pause.png"));
-    actionPause->setIcon(iconPause);
+    actionPause->setIcon(QIcon(":/icons/resources/control_pause.png"));
     actionPause->setStatusTip("Pause running task");
-    connect(actionPause, SIGNAL(triggered()), task, SLOT(pause_thread()));
     actionPause->setEnabled(false);
+    connect(actionPause, SIGNAL(triggered()), task, SLOT(pause_thread()));
 
     actionStop = new QAction("Stop", this);
-    QIcon iconStop;
-    iconStop.addFile(QStringLiteral(":/icons/resources/control_stop.png"));
-    actionStop->setIcon(iconStop);
+    actionStop->setIcon(QIcon(":/icons/resources/control_stop.png"));
     actionStop->setStatusTip("Stop running task");
-    connect(actionStop, SIGNAL(triggered()), task, SLOT(terminate_thread()));
     actionStop->setEnabled(false);
+    connect(actionStop, SIGNAL(triggered()), task, SLOT(terminate_thread()));
 
     QToolBar *taskToolBar = new QToolBar();
     addToolBar(Qt::TopToolBarArea, taskToolBar);
@@ -220,12 +200,16 @@ QStringList getSupportedPackages(ArchArgs::ArchArgsTypes chip)
 void MainWindow::new_proj()
 {
     QMap<QString, int> arch;
+#ifdef ICE40_HX1K_ONLY
+    arch.insert("Lattice HX1K", ArchArgs::HX1K);
+#else
     arch.insert("Lattice LP384", ArchArgs::LP384);
     arch.insert("Lattice LP1K", ArchArgs::LP1K);
     arch.insert("Lattice HX1K", ArchArgs::HX1K);
     arch.insert("Lattice UP5K", ArchArgs::UP5K);
     arch.insert("Lattice LP8K", ArchArgs::LP8K);
     arch.insert("Lattice HX8K", ArchArgs::HX8K);
+#endif
     bool ok;
     QString item = QInputDialog::getItem(this, "Select new context", "Chip:", arch.keys(), 0, false, &ok);
     if (ok && !item.isEmpty()) {
@@ -237,18 +221,30 @@ void MainWindow::new_proj()
 
         if (ok && !item.isEmpty()) {
             disableActions();
+            preload_pcf = "";
             chipArgs.package = package.toStdString().c_str();
-            if (ctx)
-                delete ctx;
-            ctx = new Context(chipArgs);
-
-            Q_EMIT contextChanged(ctx);
-
+            ctx = std::unique_ptr<Context>(new Context(chipArgs));
             actionLoadJSON->setEnabled(true);
+
+            Q_EMIT displaySplash();
+            Q_EMIT contextChanged(ctx.get());
         }
     }
 }
 
+void MainWindow::load_json(std::string filename, std::string pcf)
+{
+    preload_pcf = pcf;
+    disableActions();
+    Q_EMIT task->loadfile(filename);
+}
+
+void MainWindow::load_pcf(std::string filename)
+{
+    disableActions();
+    Q_EMIT task->loadpcf(filename);
+}
+
 void MainWindow::newContext(Context *ctx)
 {
     std::string title = "nextpnr-ice40 - " + ctx->getChipName() + " ( " + chipArgs.package + " )";
@@ -259,8 +255,6 @@ void MainWindow::open_proj()
 {
     QString fileName = QFileDialog::getOpenFileName(this, QString("Open Project"), QString(), QString("*.proj"));
     if (!fileName.isEmpty()) {
-        tabWidget->setCurrentWidget(info);
-
         std::string fn = fileName.toStdString();
         disableActions();
     }
@@ -270,12 +264,7 @@ void MainWindow::open_json()
 {
     QString fileName = QFileDialog::getOpenFileName(this, QString("Open JSON"), QString(), QString("*.json"));
     if (!fileName.isEmpty()) {
-        tabWidget->setCurrentWidget(info);
-
-        std::string fn = fileName.toStdString();
-        disableActions();
-        timing_driven = false;
-        Q_EMIT task->loadfile(fn);
+        load_json(fileName.toStdString(), "");
     }
 }
 
@@ -283,11 +272,7 @@ void MainWindow::open_pcf()
 {
     QString fileName = QFileDialog::getOpenFileName(this, QString("Open PCF"), QString(), QString("*.pcf"));
     if (!fileName.isEmpty()) {
-        tabWidget->setCurrentWidget(info);
-
-        std::string fn = fileName.toStdString();
-        disableActions();
-        Q_EMIT task->loadpcf(fn);
+        load_pcf(fileName.toStdString());
     }
 }
 
@@ -328,9 +313,12 @@ void MainWindow::loadfile_finished(bool status)
         log("Loading design successful.\n");
         actionLoadPCF->setEnabled(true);
         actionPack->setEnabled(true);
+        if (!preload_pcf.empty())
+            load_pcf(preload_pcf);
         Q_EMIT updateTreeView();
     } else {
         log("Loading design failed.\n");
+        preload_pcf = "";
     }
 }
 
@@ -440,4 +428,4 @@ void MainWindow::budget()
 
 void MainWindow::place() { Q_EMIT task->place(timing_driven); }
 
-NEXTPNR_NAMESPACE_END
\ No newline at end of file
+NEXTPNR_NAMESPACE_END
diff --git a/gui/ice40/mainwindow.h b/gui/ice40/mainwindow.h
index 8e847adc..cfd938f8 100644
--- a/gui/ice40/mainwindow.h
+++ b/gui/ice40/mainwindow.h
@@ -30,12 +30,13 @@ class MainWindow : public BaseMainWindow
     Q_OBJECT
 
   public:
-    explicit MainWindow(QWidget *parent = 0);
+    explicit MainWindow(std::unique_ptr<Context> context, ArchArgs args, QWidget *parent = 0);
     virtual ~MainWindow();
 
   public:
     void createMenu();
-
+    void load_json(std::string filename, std::string pcf);
+    void load_pcf(std::string filename);
   protected Q_SLOTS:
     virtual void new_proj();
     virtual void open_proj();
@@ -78,6 +79,7 @@ class MainWindow : public BaseMainWindow
 
     bool timing_driven;
     ArchArgs chipArgs;
+    std::string preload_pcf;
 };
 
 NEXTPNR_NAMESPACE_END
diff --git a/gui/ice40/worker.cc b/gui/ice40/worker.cc
index ab82b6bb..09093ec8 100644
--- a/gui/ice40/worker.cc
+++ b/gui/ice40/worker.cc
@@ -23,10 +23,7 @@
 #include "design_utils.h"
 #include "jsonparse.h"
 #include "log.h"
-#include "pack.h"
 #include "pcf.h"
-#include "place_sa.h"
-#include "route.h"
 #include "timing.h"
 
 NEXTPNR_NAMESPACE_BEGIN
@@ -99,7 +96,7 @@ void Worker::pack()
 {
     Q_EMIT taskStarted();
     try {
-        bool res = pack_design(ctx);
+        bool res = ctx->pack();
         print_utilisation(ctx);
         Q_EMIT pack_finished(res);
     } catch (WorkerInterruptionRequested) {
@@ -124,7 +121,7 @@ void Worker::place(bool timing_driven)
     Q_EMIT taskStarted();
     try {
         ctx->timing_driven = timing_driven;
-        Q_EMIT place_finished(place_design_sa(ctx));
+        Q_EMIT place_finished(ctx->place());
     } catch (WorkerInterruptionRequested) {
         Q_EMIT taskCanceled();
     }
@@ -134,7 +131,7 @@ void Worker::route()
 {
     Q_EMIT taskStarted();
     try {
-        Q_EMIT route_finished(route_design(ctx));
+        Q_EMIT route_finished(ctx->route());
     } catch (WorkerInterruptionRequested) {
         Q_EMIT taskCanceled();
     }
diff --git a/gui/infotab.h b/gui/infotab.h
index 0116755e..41529973 100644
--- a/gui/infotab.h
+++ b/gui/infotab.h
@@ -33,9 +33,10 @@ class InfoTab : public QWidget
   public:
     explicit InfoTab(QWidget *parent = 0);
     void info(std::string str);
+  public Q_SLOTS:
+    void clearBuffer();
   private Q_SLOTS:
     void showContextMenu(const QPoint &pt);
-    void clearBuffer();
 
   private:
     QPlainTextEdit *plainTextEdit;
diff --git a/gui/line_editor.cc b/gui/line_editor.cc
index 9d9dac25..425f2876 100644
--- a/gui/line_editor.cc
+++ b/gui/line_editor.cc
@@ -2,6 +2,7 @@
  *  nextpnr -- Next Generation Place and Route
  *
  *  Copyright (C) 2018  Miodrag Milanovic <miodrag@symbioticeda.com>
+ *  Copyright (C) 2018  Alex Tsui
  *
  *  Permission to use, copy, modify, and/or distribute this software for any
  *  purpose with or without fee is hereby granted, provided that the above
@@ -19,10 +20,14 @@
 
 #include "line_editor.h"
 #include <QKeyEvent>
+#include <QToolTip>
+#include "ColumnFormatter.h"
+#include "Utils.h"
+#include "pyinterpreter.h"
 
 NEXTPNR_NAMESPACE_BEGIN
 
-LineEditor::LineEditor(QWidget *parent) : QLineEdit(parent), index(0)
+LineEditor::LineEditor(ParseHelper *helper, QWidget *parent) : QLineEdit(parent), index(0), parseHelper(helper)
 {
     setContextMenuPolicy(Qt::CustomContextMenu);
     QAction *clearAction = new QAction("Clear &history", this);
@@ -38,10 +43,12 @@ LineEditor::LineEditor(QWidget *parent) : QLineEdit(parent), index(0)
 
 void LineEditor::keyPressEvent(QKeyEvent *ev)
 {
+
     if (ev->key() == Qt::Key_Up || ev->key() == Qt::Key_Down) {
+        QToolTip::hideText();
         if (lines.empty())
             return;
-
+        printf("Key_Up\n");
         if (ev->key() == Qt::Key_Up)
             index--;
         if (ev->key() == Qt::Key_Down)
@@ -56,12 +63,21 @@ void LineEditor::keyPressEvent(QKeyEvent *ev)
         }
         setText(lines[index]);
     } else if (ev->key() == Qt::Key_Escape) {
+        QToolTip::hideText();
         clear();
         return;
+    } else if (ev->key() == Qt::Key_Tab) {
+        autocomplete();
+        return;
     }
+    QToolTip::hideText();
+
     QLineEdit::keyPressEvent(ev);
 }
 
+// This makes TAB work
+bool LineEditor::focusNextPrevChild(bool next) { return false; }
+
 void LineEditor::textInserted()
 {
     if (lines.empty() || lines.back() != text())
@@ -82,4 +98,34 @@ void LineEditor::clearHistory()
     clear();
 }
 
-NEXTPNR_NAMESPACE_END
\ No newline at end of file
+void LineEditor::autocomplete()
+{
+    QString line = text();
+    const std::list<std::string> &suggestions = pyinterpreter_suggest(line.toStdString());
+    if (suggestions.size() == 1) {
+        line = suggestions.back().c_str();
+    } else {
+        // try to complete to longest common prefix
+        std::string prefix = LongestCommonPrefix(suggestions.begin(), suggestions.end());
+        if (prefix.size() > (size_t)line.size()) {
+            line = prefix.c_str();
+        } else {
+            ColumnFormatter fmt;
+            fmt.setItems(suggestions.begin(), suggestions.end());
+            fmt.format(width() / 5);
+            QString out = "";
+            for (auto &it : fmt.formattedOutput()) {
+                if (!out.isEmpty())
+                    out += "\n";
+                out += it.c_str();
+            }
+            QToolTip::setFont(font());
+            if (!out.trimmed().isEmpty())
+                QToolTip::showText(mapToGlobal(QPoint(0, 0)), out);
+        }
+    }
+    // set up the next line on the console
+    setText(line);
+}
+
+NEXTPNR_NAMESPACE_END
diff --git a/gui/line_editor.h b/gui/line_editor.h
index 91837182..a779072f 100644
--- a/gui/line_editor.h
+++ b/gui/line_editor.h
@@ -2,6 +2,7 @@
  *  nextpnr -- Next Generation Place and Route
  *
  *  Copyright (C) 2018  Miodrag Milanovic <miodrag@symbioticeda.com>
+ *  Copyright (C) 2018  Alex Tsui
  *
  *  Permission to use, copy, modify, and/or distribute this software for any
  *  purpose with or without fee is hereby granted, provided that the above
@@ -22,6 +23,7 @@
 
 #include <QLineEdit>
 #include <QMenu>
+#include "ParseHelper.h"
 #include "nextpnr.h"
 
 NEXTPNR_NAMESPACE_BEGIN
@@ -31,7 +33,7 @@ class LineEditor : public QLineEdit
     Q_OBJECT
 
   public:
-    explicit LineEditor(QWidget *parent = 0);
+    explicit LineEditor(ParseHelper *helper, QWidget *parent = 0);
 
   private Q_SLOTS:
     void textInserted();
@@ -43,11 +45,14 @@ class LineEditor : public QLineEdit
 
   protected:
     void keyPressEvent(QKeyEvent *) Q_DECL_OVERRIDE;
+    bool focusNextPrevChild(bool next) Q_DECL_OVERRIDE;
+    void autocomplete();
 
   private:
     int index;
     QStringList lines;
     QMenu *contextMenu;
+    ParseHelper *parseHelper;
 };
 
 NEXTPNR_NAMESPACE_END
diff --git a/gui/pyconsole.cc b/gui/pyconsole.cc
new file mode 100644
index 00000000..0ee393ce
--- /dev/null
+++ b/gui/pyconsole.cc
@@ -0,0 +1,79 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Miodrag Milanovic <miodrag@symbioticeda.com>
+ *  Copyright (C) 2018  Alex Tsui
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "pyconsole.h"
+#include "pyinterpreter.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+const QColor PythonConsole::NORMAL_COLOR = QColor::fromRgbF(0, 0, 0);
+const QColor PythonConsole::ERROR_COLOR = QColor::fromRgbF(1.0, 0, 0);
+const QColor PythonConsole::OUTPUT_COLOR = QColor::fromRgbF(0, 0, 1.0);
+
+PythonConsole::PythonConsole(QWidget *parent) : QTextEdit(parent) {}
+
+void PythonConsole::parseEvent(const ParseMessage &message)
+{
+    // handle invalid user input
+    if (message.errorCode) {
+        setTextColor(ERROR_COLOR);
+        append(message.message.c_str());
+
+        setTextColor(NORMAL_COLOR);
+        append("");
+        return;
+    }
+    // interpret valid user input
+    int errorCode = 0;
+    std::string res;
+    if (message.message.size())
+        res = pyinterpreter_execute(message.message, &errorCode);
+    if (errorCode) {
+        setTextColor(ERROR_COLOR);
+    } else {
+        setTextColor(OUTPUT_COLOR);
+    }
+
+    if (res.size()) {
+        append(res.c_str());
+    }
+    setTextColor(NORMAL_COLOR);
+    append("");
+    moveCursorToEnd();
+}
+
+void PythonConsole::displayString(QString text)
+{
+    QTextCursor cursor = textCursor();
+    cursor.movePosition(QTextCursor::End);
+    setTextColor(NORMAL_COLOR);
+    cursor.insertText(text);
+    cursor.movePosition(QTextCursor::EndOfLine);
+    moveCursorToEnd();
+}
+
+void PythonConsole::moveCursorToEnd()
+{
+    QTextCursor cursor = textCursor();
+    cursor.movePosition(QTextCursor::End);
+    setTextCursor(cursor);
+}
+
+NEXTPNR_NAMESPACE_END
diff --git a/gui/pyconsole.h b/gui/pyconsole.h
new file mode 100644
index 00000000..9dbd3b95
--- /dev/null
+++ b/gui/pyconsole.h
@@ -0,0 +1,55 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Miodrag Milanovic <miodrag@symbioticeda.com>
+ *  Copyright (C) 2018  Alex Tsui
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef PYCONSOLE_H
+#define PYCONSOLE_H
+
+#include <QColor>
+#include <QMimeData>
+#include <QTextEdit>
+#include "ParseHelper.h"
+#include "ParseListener.h"
+#include "nextpnr.h"
+
+class QWidget;
+class QKeyEvent;
+
+NEXTPNR_NAMESPACE_BEGIN
+
+class PythonConsole : public QTextEdit, public ParseListener
+{
+    Q_OBJECT
+
+  public:
+    PythonConsole(QWidget *parent = 0);
+
+    void displayString(QString text);
+    void moveCursorToEnd();
+    virtual void parseEvent(const ParseMessage &message);
+
+  protected:
+    static const QColor NORMAL_COLOR;
+    static const QColor ERROR_COLOR;
+    static const QColor OUTPUT_COLOR;
+};
+
+NEXTPNR_NAMESPACE_END
+
+#endif // PYCONSOLE_H
diff --git a/gui/pythontab.cc b/gui/pythontab.cc
index 897f87b3..e761128d 100644
--- a/gui/pythontab.cc
+++ b/gui/pythontab.cc
@@ -16,7 +16,6 @@
  *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  *
  */
-#ifndef NO_PYTHON
 
 #include "pythontab.h"
 #include <QGridLayout>
@@ -25,12 +24,20 @@
 
 NEXTPNR_NAMESPACE_BEGIN
 
+const QString PythonTab::PROMPT = ">>> ";
+const QString PythonTab::MULTILINE_PROMPT = "... ";
+
 PythonTab::PythonTab(QWidget *parent) : QWidget(parent), initialized(false)
 {
+    QFont f("unexistent");
+    f.setStyleHint(QFont::Monospace);
+
     // Add text area for Python output and input line
     console = new PythonConsole();
     console->setMinimumHeight(100);
-    console->setEnabled(false);
+    console->setReadOnly(true);
+    console->setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::TextSelectableByKeyboard);
+    console->setFont(f);
 
     console->setContextMenuPolicy(Qt::CustomContextMenu);
     QAction *clearAction = new QAction("Clear &buffer", this);
@@ -41,9 +48,21 @@ PythonTab::PythonTab(QWidget *parent) : QWidget(parent), initialized(false)
     contextMenu->addAction(clearAction);
     connect(console, SIGNAL(customContextMenuRequested(const QPoint)), this, SLOT(showContextMenu(const QPoint)));
 
+    lineEdit = new LineEditor(&parseHelper);
+    lineEdit->setMinimumHeight(30);
+    lineEdit->setMaximumHeight(30);
+    lineEdit->setFont(f);
+    lineEdit->setPlaceholderText(PythonTab::PROMPT);
+    connect(lineEdit, SIGNAL(textLineInserted(QString)), this, SLOT(editLineReturnPressed(QString)));
+
     QGridLayout *mainLayout = new QGridLayout();
     mainLayout->addWidget(console, 0, 0);
+    mainLayout->addWidget(lineEdit, 1, 0);
     setLayout(mainLayout);
+
+    parseHelper.subscribe(console);
+
+    prompt = PythonTab::PROMPT;
 }
 
 PythonTab::~PythonTab()
@@ -54,13 +73,26 @@ PythonTab::~PythonTab()
     }
 }
 
+void PythonTab::editLineReturnPressed(QString text)
+{
+    console->displayString(prompt + text + "\n");
+
+    parseHelper.process(text.toStdString());
+
+    if (parseHelper.buffered())
+        prompt = PythonTab::MULTILINE_PROMPT;
+    else
+        prompt = PythonTab::PROMPT;
+
+    lineEdit->setPlaceholderText(prompt);
+}
+
 void PythonTab::newContext(Context *ctx)
 {
     if (initialized) {
         pyinterpreter_finalize();
         deinit_python();
     }
-    console->setEnabled(true);
     console->clear();
 
     pyinterpreter_preinit();
@@ -74,13 +106,12 @@ void PythonTab::newContext(Context *ctx)
 
     QString version = QString("Python %1 on %2\n").arg(Py_GetVersion(), Py_GetPlatform());
     console->displayString(version);
-    console->displayPrompt();
 }
 
 void PythonTab::showContextMenu(const QPoint &pt) { contextMenu->exec(mapToGlobal(pt)); }
 
 void PythonTab::clearBuffer() { console->clear(); }
 
-NEXTPNR_NAMESPACE_END
+void PythonTab::info(std::string str) { console->displayString(str.c_str()); }
 
-#endif
\ No newline at end of file
+NEXTPNR_NAMESPACE_END
diff --git a/gui/pythontab.h b/gui/pythontab.h
index 4b22e6a9..134874b6 100644
--- a/gui/pythontab.h
+++ b/gui/pythontab.h
@@ -20,11 +20,10 @@
 #ifndef PYTHONTAB_H
 #define PYTHONTAB_H
 
-#ifndef NO_PYTHON
-
 #include <QLineEdit>
 #include <QMenu>
 #include <QPlainTextEdit>
+#include "ParseHelper.h"
 #include "line_editor.h"
 #include "nextpnr.h"
 #include "pyconsole.h"
@@ -41,17 +40,24 @@ class PythonTab : public QWidget
 
   private Q_SLOTS:
     void showContextMenu(const QPoint &pt);
-    void clearBuffer();
+    void editLineReturnPressed(QString text);
   public Q_SLOTS:
     void newContext(Context *ctx);
+    void info(std::string str);
+    void clearBuffer();
 
   private:
     PythonConsole *console;
+    LineEditor *lineEdit;
     QMenu *contextMenu;
     bool initialized;
+    ParseHelper parseHelper;
+    QString prompt;
+
+    static const QString PROMPT;
+    static const QString MULTILINE_PROMPT;
 };
 
 NEXTPNR_NAMESPACE_END
-#endif // NO_PYTHON
 
 #endif // PYTHONTAB_H
diff --git a/gui/resources/resultset_first.png b/gui/resources/resultset_first.png
new file mode 100644
index 00000000..b03eaf8b
Binary files /dev/null and b/gui/resources/resultset_first.png differ
diff --git a/gui/resources/resultset_last.png b/gui/resources/resultset_last.png
new file mode 100644
index 00000000..8ec89478
Binary files /dev/null and b/gui/resources/resultset_last.png differ
diff --git a/gui/resources/resultset_next.png b/gui/resources/resultset_next.png
new file mode 100644
index 00000000..e252606d
Binary files /dev/null and b/gui/resources/resultset_next.png differ
diff --git a/gui/resources/resultset_previous.png b/gui/resources/resultset_previous.png
new file mode 100644
index 00000000..18f9cc10
Binary files /dev/null and b/gui/resources/resultset_previous.png differ
diff --git a/gui/resources/splash.png b/gui/resources/splash.png
new file mode 100644
index 00000000..14d2842b
Binary files /dev/null and b/gui/resources/splash.png differ
diff --git a/gui/resources/zoom.png b/gui/resources/zoom.png
new file mode 100644
index 00000000..908612e3
Binary files /dev/null and b/gui/resources/zoom.png differ
diff --git a/ice40/arch.cc b/ice40/arch.cc
index 72f9c1f3..adc37dbd 100644
--- a/ice40/arch.cc
+++ b/ice40/arch.cc
@@ -19,9 +19,13 @@
 
 #include <algorithm>
 #include <cmath>
+#include "gfx.h"
 #include "log.h"
 #include "nextpnr.h"
+#include "placer1.h"
+#include "router1.h"
 #include "util.h"
+
 NEXTPNR_NAMESPACE_BEGIN
 
 // -----------------------------------------------------------------------
@@ -365,6 +369,49 @@ std::string Arch::getBelPackagePin(BelId bel) const
     }
     return "";
 }
+
+// -----------------------------------------------------------------------
+
+GroupId Arch::getGroupByName(IdString name) const
+{
+    for (auto g : getGroups())
+        if (getGroupName(g) == name)
+            return g;
+    return GroupId();
+}
+
+IdString Arch::getGroupName(GroupId group) const { return IdString(); }
+
+std::vector<GroupId> Arch::getGroups() const
+{
+    std::vector<GroupId> ret;
+    return ret;
+}
+
+std::vector<BelId> Arch::getGroupBels(GroupId group) const
+{
+    std::vector<BelId> ret;
+    return ret;
+}
+
+std::vector<WireId> Arch::getGroupWires(GroupId group) const
+{
+    std::vector<WireId> ret;
+    return ret;
+}
+
+std::vector<PipId> Arch::getGroupPips(GroupId group) const
+{
+    std::vector<PipId> ret;
+    return ret;
+}
+
+std::vector<GroupId> Arch::getGroupGroups(GroupId group) const
+{
+    std::vector<GroupId> ret;
+    return ret;
+}
+
 // -----------------------------------------------------------------------
 
 void Arch::estimatePosition(BelId bel, int &x, int &y, bool &gb) const
@@ -398,100 +445,206 @@ delay_t Arch::estimateDelay(WireId src, WireId dst) const
 
 // -----------------------------------------------------------------------
 
-std::vector<GraphicElement> Arch::getFrameGraphics() const
+bool Arch::place() { return placer1(getCtx()); }
+
+bool Arch::route() { return router1(getCtx()); }
+
+// -----------------------------------------------------------------------
+
+DecalXY Arch::getFrameDecal() const
 {
-    std::vector<GraphicElement> ret;
-
-    for (int x = 0; x <= chip_info->width; x++)
-        for (int y = 0; y <= chip_info->height; y++) {
-            GraphicElement el;
-            el.type = GraphicElement::G_LINE;
-            el.x1 = x - 0.05, el.x2 = x + 0.05, el.y1 = y, el.y2 = y, el.z = 0;
-            ret.push_back(el);
-            el.x1 = x, el.x2 = x, el.y1 = y - 0.05, el.y2 = y + 0.05, el.z = 0;
-            ret.push_back(el);
-        }
-
-    return ret;
+    DecalXY decalxy;
+    decalxy.decal.type = DecalId::TYPE_FRAME;
+    decalxy.decal.active = true;
+    return decalxy;
 }
 
-std::vector<GraphicElement> Arch::getBelGraphics(BelId bel) const
+DecalXY Arch::getBelDecal(BelId bel) const
 {
-    std::vector<GraphicElement> ret;
-
-    auto bel_type = getBelType(bel);
-
-    if (bel_type == TYPE_ICESTORM_LC) {
-        GraphicElement el;
-        el.type = GraphicElement::G_BOX;
-        el.x1 = chip_info->bel_data[bel.index].x + 0.1;
-        el.x2 = chip_info->bel_data[bel.index].x + 0.9;
-        el.y1 = chip_info->bel_data[bel.index].y + 0.10 + (chip_info->bel_data[bel.index].z) * (0.8 / 8);
-        el.y2 = chip_info->bel_data[bel.index].y + 0.18 + (chip_info->bel_data[bel.index].z) * (0.8 / 8);
-        el.z = 0;
-        ret.push_back(el);
-    }
-
-    if (bel_type == TYPE_SB_IO) {
-        if (chip_info->bel_data[bel.index].x == 0 || chip_info->bel_data[bel.index].x == chip_info->width - 1) {
-            GraphicElement el;
-            el.type = GraphicElement::G_BOX;
-            el.x1 = chip_info->bel_data[bel.index].x + 0.1;
-            el.x2 = chip_info->bel_data[bel.index].x + 0.9;
-            if (chip_info->bel_data[bel.index].z == 0) {
-                el.y1 = chip_info->bel_data[bel.index].y + 0.10;
-                el.y2 = chip_info->bel_data[bel.index].y + 0.45;
-            } else {
-                el.y1 = chip_info->bel_data[bel.index].y + 0.55;
-                el.y2 = chip_info->bel_data[bel.index].y + 0.90;
-            }
-            el.z = 0;
-            ret.push_back(el);
-        } else {
-            GraphicElement el;
-            el.type = GraphicElement::G_BOX;
-            if (chip_info->bel_data[bel.index].z == 0) {
-                el.x1 = chip_info->bel_data[bel.index].x + 0.10;
-                el.x2 = chip_info->bel_data[bel.index].x + 0.45;
-            } else {
-                el.x1 = chip_info->bel_data[bel.index].x + 0.55;
-                el.x2 = chip_info->bel_data[bel.index].x + 0.90;
-            }
-            el.y1 = chip_info->bel_data[bel.index].y + 0.1;
-            el.y2 = chip_info->bel_data[bel.index].y + 0.9;
-            el.z = 0;
-            ret.push_back(el);
-        }
-    }
-
-    if (bel_type == TYPE_ICESTORM_RAM) {
-        GraphicElement el;
-        el.type = GraphicElement::G_BOX;
-        el.x1 = chip_info->bel_data[bel.index].x + 0.1;
-        el.x2 = chip_info->bel_data[bel.index].x + 0.9;
-        el.y1 = chip_info->bel_data[bel.index].y + 0.1;
-        el.y2 = chip_info->bel_data[bel.index].y + 1.9;
-        el.z = 0;
-        ret.push_back(el);
-    }
-
-    return ret;
+    DecalXY decalxy;
+    decalxy.decal.type = DecalId::TYPE_BEL;
+    decalxy.decal.index = bel.index;
+    decalxy.decal.active = bel_to_cell.at(bel.index) != IdString();
+    return decalxy;
 }
 
-std::vector<GraphicElement> Arch::getWireGraphics(WireId wire) const
+DecalXY Arch::getWireDecal(WireId wire) const
 {
-    std::vector<GraphicElement> ret;
-    // FIXME
-    return ret;
+    DecalXY decalxy;
+    decalxy.decal.type = DecalId::TYPE_WIRE;
+    decalxy.decal.index = wire.index;
+    decalxy.decal.active = wire_to_net.at(wire.index) != IdString();
+    return decalxy;
 }
 
-std::vector<GraphicElement> Arch::getPipGraphics(PipId pip) const
+DecalXY Arch::getPipDecal(PipId pip) const
 {
-    std::vector<GraphicElement> ret;
-    // FIXME
-    return ret;
+    DecalXY decalxy;
+    decalxy.decal.type = DecalId::TYPE_PIP;
+    decalxy.decal.index = pip.index;
+    decalxy.decal.active = pip_to_net.at(pip.index) != IdString();
+    return decalxy;
 };
 
+DecalXY Arch::getGroupDecal(GroupId group) const
+{
+    DecalXY decalxy;
+    decalxy.decal.type = DecalId::TYPE_GROUP;
+    decalxy.decal.index = (group.type << 16) | (group.x << 8) | (group.y);
+    decalxy.decal.active = true;
+    return decalxy;
+};
+
+std::vector<GraphicElement> Arch::getDecalGraphics(DecalId decal) const
+{
+    std::vector<GraphicElement> ret;
+
+    if (decal.type == DecalId::TYPE_FRAME) {
+        for (int x = 0; x <= chip_info->width; x++)
+            for (int y = 0; y <= chip_info->height; y++) {
+                GraphicElement el;
+                el.type = GraphicElement::G_LINE;
+                el.x1 = x - 0.05, el.x2 = x + 0.05, el.y1 = y, el.y2 = y, el.z = 0;
+                ret.push_back(el);
+                el.x1 = x, el.x2 = x, el.y1 = y - 0.05, el.y2 = y + 0.05, el.z = 0;
+                ret.push_back(el);
+            }
+    }
+
+    if (decal.type == DecalId::TYPE_WIRE) {
+        WireId wire;
+        wire.index = decal.index;
+
+        int n = chip_info->wire_data[wire.index].num_segments;
+        const WireSegmentPOD *p = chip_info->wire_data[wire.index].segments.get();
+
+        GraphicElement::style_t style = decal.active ? GraphicElement::G_ACTIVE : GraphicElement::G_INACTIVE;
+
+        for (int i = 0; i < n; i++)
+            gfxTileWire(ret, p[i].x, p[i].y, GfxTileWireId(p[i].index), style);
+    }
+
+    if (decal.type == DecalId::TYPE_BEL) {
+        BelId bel;
+        bel.index = decal.index;
+
+        auto bel_type = getBelType(bel);
+
+        if (bel_type == TYPE_ICESTORM_LC) {
+            GraphicElement el;
+            el.type = GraphicElement::G_BOX;
+            el.style = decal.active ? GraphicElement::G_ACTIVE : GraphicElement::G_INACTIVE;
+            el.x1 = chip_info->bel_data[bel.index].x + logic_cell_x1;
+            el.x2 = chip_info->bel_data[bel.index].x + logic_cell_x2;
+            el.y1 = chip_info->bel_data[bel.index].y + logic_cell_y1 +
+                    (chip_info->bel_data[bel.index].z) * logic_cell_pitch;
+            el.y2 = chip_info->bel_data[bel.index].y + logic_cell_y2 +
+                    (chip_info->bel_data[bel.index].z) * logic_cell_pitch;
+            el.z = 0;
+            ret.push_back(el);
+
+            if (chip_info->bel_data[bel.index].z == 0) {
+                int tx = chip_info->bel_data[bel.index].x;
+                int ty = chip_info->bel_data[bel.index].y;
+
+                // Main switchbox
+                GraphicElement main_sw;
+                main_sw.type = GraphicElement::G_BOX;
+                main_sw.style = GraphicElement::G_FRAME;
+                main_sw.x1 = tx + main_swbox_x1;
+                main_sw.x2 = tx + main_swbox_x2;
+                main_sw.y1 = ty + main_swbox_y1;
+                main_sw.y2 = ty + main_swbox_y2;
+                ret.push_back(main_sw);
+
+                // Local tracks to LUT input switchbox
+                GraphicElement local_sw;
+                local_sw.type = GraphicElement::G_BOX;
+                local_sw.style = GraphicElement::G_FRAME;
+                local_sw.x1 = tx + local_swbox_x1;
+                local_sw.x2 = tx + local_swbox_x2;
+                local_sw.y1 = ty + local_swbox_y1;
+                local_sw.y2 = ty + local_swbox_y2;
+                local_sw.z = 0;
+                ret.push_back(local_sw);
+            }
+        }
+
+        if (bel_type == TYPE_SB_IO) {
+            if (chip_info->bel_data[bel.index].x == 0 || chip_info->bel_data[bel.index].x == chip_info->width - 1) {
+                GraphicElement el;
+                el.type = GraphicElement::G_BOX;
+                el.x1 = chip_info->bel_data[bel.index].x + 0.1;
+                el.x2 = chip_info->bel_data[bel.index].x + 0.9;
+                if (chip_info->bel_data[bel.index].z == 0) {
+                    el.y1 = chip_info->bel_data[bel.index].y + 0.10;
+                    el.y2 = chip_info->bel_data[bel.index].y + 0.45;
+                } else {
+                    el.y1 = chip_info->bel_data[bel.index].y + 0.55;
+                    el.y2 = chip_info->bel_data[bel.index].y + 0.90;
+                }
+                el.z = 0;
+                ret.push_back(el);
+            } else {
+                GraphicElement el;
+                el.type = GraphicElement::G_BOX;
+                if (chip_info->bel_data[bel.index].z == 0) {
+                    el.x1 = chip_info->bel_data[bel.index].x + 0.10;
+                    el.x2 = chip_info->bel_data[bel.index].x + 0.45;
+                } else {
+                    el.x1 = chip_info->bel_data[bel.index].x + 0.55;
+                    el.x2 = chip_info->bel_data[bel.index].x + 0.90;
+                }
+                el.y1 = chip_info->bel_data[bel.index].y + 0.1;
+                el.y2 = chip_info->bel_data[bel.index].y + 0.9;
+                el.z = 0;
+                ret.push_back(el);
+            }
+        }
+
+        if (bel_type == TYPE_ICESTORM_RAM) {
+            for (int i = 0; i < 2; i++)
+            {
+                int tx = chip_info->bel_data[bel.index].x;
+                int ty = chip_info->bel_data[bel.index].y + i;
+
+                GraphicElement el;
+                el.type = GraphicElement::G_BOX;
+                el.style = decal.active ? GraphicElement::G_ACTIVE : GraphicElement::G_INACTIVE;
+                el.x1 = chip_info->bel_data[bel.index].x + logic_cell_x1;
+                el.x2 = chip_info->bel_data[bel.index].x + logic_cell_x2;
+                el.y1 = chip_info->bel_data[bel.index].y + logic_cell_y1;
+                el.y2 = chip_info->bel_data[bel.index].y + logic_cell_y2 + 7*logic_cell_pitch;
+                el.z = 0;
+                ret.push_back(el);
+
+                // Main switchbox
+                GraphicElement main_sw;
+                main_sw.type = GraphicElement::G_BOX;
+                main_sw.style = GraphicElement::G_FRAME;
+                main_sw.x1 = tx + main_swbox_x1;
+                main_sw.x2 = tx + main_swbox_x2;
+                main_sw.y1 = ty + main_swbox_y1;
+                main_sw.y2 = ty + main_swbox_y2;
+                ret.push_back(main_sw);
+
+                // Local tracks to LUT input switchbox
+                GraphicElement local_sw;
+                local_sw.type = GraphicElement::G_BOX;
+                local_sw.style = GraphicElement::G_FRAME;
+                local_sw.x1 = tx + local_swbox_x1;
+                local_sw.x2 = tx + local_swbox_x2;
+                local_sw.y1 = ty + local_swbox_y1;
+                local_sw.y2 = ty + local_swbox_y2;
+                local_sw.z = 0;
+                ret.push_back(local_sw);
+            }
+        }
+    }
+
+    return ret;
+}
+
 // -----------------------------------------------------------------------
 
 bool Arch::getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort, delay_t &delay) const
diff --git a/ice40/arch.h b/ice40/arch.h
index 43aa0829..a02e0ced 100644
--- a/ice40/arch.h
+++ b/ice40/arch.h
@@ -70,6 +70,11 @@ NPNR_PACKED_STRUCT(struct PipInfoPOD {
     int32_t switch_index;
 });
 
+NPNR_PACKED_STRUCT(struct WireSegmentPOD {
+    int8_t x, y;
+    int16_t index;
+});
+
 NPNR_PACKED_STRUCT(struct WireInfoPOD {
     RelPtr<char> name;
     int32_t num_uphill, num_downhill;
@@ -79,6 +84,9 @@ NPNR_PACKED_STRUCT(struct WireInfoPOD {
     BelPortPOD bel_uphill;
     RelPtr<BelPortPOD> bels_downhill;
 
+    int32_t num_segments;
+    RelPtr<WireSegmentPOD> segments;
+
     int8_t x, y;
     WireType type;
     int8_t padding_0;
@@ -515,9 +523,6 @@ struct Arch : BaseCtx
     // -------------------------------------------------
 
     PipId getPipByName(IdString name) const;
-    IdString getPipName(PipId pip) const;
-
-    uint32_t getPipChecksum(PipId pip) const { return pip.index; }
 
     void bindPip(PipId pip, IdString net, PlaceStrength strength)
     {
@@ -577,6 +582,10 @@ struct Arch : BaseCtx
         range.e.cursor = chip_info->num_pips;
         return range;
     }
+    
+    IdString getPipName(PipId pip) const;
+
+    uint32_t getPipChecksum(PipId pip) const { return pip.index; }
 
     WireId getPipSrcWire(PipId pip) const
     {
@@ -634,6 +643,16 @@ struct Arch : BaseCtx
 
     // -------------------------------------------------
 
+    GroupId getGroupByName(IdString name) const;
+    IdString getGroupName(GroupId group) const;
+    std::vector<GroupId> getGroups() const;
+    std::vector<BelId> getGroupBels(GroupId group) const;
+    std::vector<WireId> getGroupWires(GroupId group) const;
+    std::vector<PipId> getGroupPips(GroupId group) const;
+    std::vector<GroupId> getGroupGroups(GroupId group) const;
+
+    // -------------------------------------------------
+
     void estimatePosition(BelId bel, int &x, int &y, bool &gb) const;
     delay_t estimateDelay(WireId src, WireId dst) const;
     delay_t getDelayEpsilon() const { return 20; }
@@ -643,16 +662,19 @@ struct Arch : BaseCtx
 
     // -------------------------------------------------
 
-    std::vector<GraphicElement> getFrameGraphics() const;
-    std::vector<GraphicElement> getBelGraphics(BelId bel) const;
-    std::vector<GraphicElement> getWireGraphics(WireId wire) const;
-    std::vector<GraphicElement> getPipGraphics(PipId pip) const;
+    bool pack();
+    bool place();
+    bool route();
 
-    bool allGraphicsReload = false;
-    bool frameGraphicsReload = false;
-    std::unordered_set<BelId> belGraphicsReload;
-    std::unordered_set<WireId> wireGraphicsReload;
-    std::unordered_set<PipId> pipGraphicsReload;
+    // -------------------------------------------------
+
+    std::vector<GraphicElement> getDecalGraphics(DecalId decal) const;
+
+    DecalXY getFrameDecal() const;
+    DecalXY getBelDecal(BelId bel) const;
+    DecalXY getWireDecal(WireId wire) const;
+    DecalXY getPipDecal(PipId pip) const;
+    DecalXY getGroupDecal(GroupId group) const;
 
     // -------------------------------------------------
 
diff --git a/ice40/arch_pybindings.cc b/ice40/arch_pybindings.cc
index 67a37983..fd5109b4 100644
--- a/ice40/arch_pybindings.cc
+++ b/ice40/arch_pybindings.cc
@@ -58,7 +58,10 @@ void arch_wrap_python()
 
     auto arch_cls = class_<Arch, Arch *, bases<BaseCtx>, boost::noncopyable>("Arch", init<ArchArgs>());
     auto ctx_cls = class_<Context, Context *, bases<Arch>, boost::noncopyable>("Context", no_init)
-                           .def("checksum", &Context::checksum);
+                           .def("checksum", &Context::checksum)
+                           .def("pack", &Context::pack)
+                           .def("place", &Context::place)
+                           .def("route", &Context::route);
 
     fn_wrapper_1a<Context, decltype(&Context::getBelType), &Context::getBelType, conv_to_str<BelType>,
                   conv_from_str<BelId>>::def_wrap(ctx_cls, "getBelType");
@@ -75,7 +78,7 @@ void arch_wrap_python()
     fn_wrapper_1a<Context, decltype(&Context::getConflictingBelCell), &Context::getConflictingBelCell,
                   conv_to_str<IdString>, conv_from_str<BelId>>::def_wrap(ctx_cls, "getConflictingBelCell");
     fn_wrapper_0a<Context, decltype(&Context::getBels), &Context::getBels, wrap_context<BelRange>>::def_wrap(ctx_cls,
-                                                                                                           "getBels");
+                                                                                                             "getBels");
     fn_wrapper_1a<Context, decltype(&Context::getBelsAtSameTile), &Context::getBelsAtSameTile, wrap_context<BelRange>,
                   conv_from_str<BelId>>::def_wrap(ctx_cls, "getBelsAtSameTile");
 
@@ -139,15 +142,15 @@ void arch_wrap_python()
     fn_wrapper_0a<Context, decltype(&Context::getChipName), &Context::getChipName, pass_through<std::string>>::def_wrap(
             ctx_cls, "getChipName");
     fn_wrapper_0a<Context, decltype(&Context::archId), &Context::archId, conv_to_str<IdString>>::def_wrap(ctx_cls,
-                                                                                                        "archId");
+                                                                                                          "archId");
 
     typedef std::unordered_map<IdString, std::unique_ptr<CellInfo>> CellMap;
     typedef std::unordered_map<IdString, std::unique_ptr<NetInfo>> NetMap;
 
     readonly_wrapper<Context, decltype(&Context::cells), &Context::cells, wrap_context<CellMap &>>::def_wrap(ctx_cls,
-                                                                                                           "cells");
+                                                                                                             "cells");
     readonly_wrapper<Context, decltype(&Context::nets), &Context::nets, wrap_context<NetMap &>>::def_wrap(ctx_cls,
-                                                                                                        "nets");
+                                                                                                          "nets");
     WRAP_RANGE(Bel, conv_to_str<BelId>);
     WRAP_RANGE(Wire, conv_to_str<WireId>);
     WRAP_RANGE(AllPip, conv_to_str<PipId>);
diff --git a/ice40/archdefs.h b/ice40/archdefs.h
index be2e406d..75df678a 100644
--- a/ice40/archdefs.h
+++ b/ice40/archdefs.h
@@ -21,6 +21,8 @@
 #error Include "archdefs.h" via "nextpnr.h" only.
 #endif
 
+#include <boost/functional/hash.hpp>
+
 NEXTPNR_NAMESPACE_BEGIN
 
 typedef int delay_t;
@@ -107,6 +109,47 @@ struct PipId
     bool operator!=(const PipId &other) const { return index != other.index; }
 };
 
+struct GroupId
+{
+    enum : int8_t
+    {
+        TYPE_NONE,
+        TYPE_FRAME,
+        TYPE_MAIN_SW,
+        TYPE_LOCAL_SW,
+        TYPE_LC0_SW,
+        TYPE_LC1_SW,
+        TYPE_LC2_SW,
+        TYPE_LC3_SW,
+        TYPE_LC4_SW,
+        TYPE_LC5_SW,
+        TYPE_LC6_SW,
+        TYPE_LC7_SW
+    } type = TYPE_NONE;
+    int8_t x = 0, y = 0;
+
+    bool operator==(const GroupId &other) const { return (type == other.type) && (x == other.x) && (y == other.y); }
+    bool operator!=(const GroupId &other) const { return (type != other.type) || (x != other.x) || (y == other.y); }
+};
+
+struct DecalId
+{
+    enum : int8_t
+    {
+        TYPE_NONE,
+        TYPE_FRAME,
+        TYPE_BEL,
+        TYPE_WIRE,
+        TYPE_PIP,
+        TYPE_GROUP
+    } type = TYPE_NONE;
+    int32_t index = -1;
+    bool active = false;
+
+    bool operator==(const DecalId &other) const { return (type == other.type) && (index == other.index); }
+    bool operator!=(const DecalId &other) const { return (type != other.type) || (index != other.index); }
+};
+
 NEXTPNR_NAMESPACE_END
 
 namespace std {
@@ -135,4 +178,28 @@ template <> struct hash<NEXTPNR_NAMESPACE_PREFIX BelType> : hash<int>
 template <> struct hash<NEXTPNR_NAMESPACE_PREFIX PortPin> : hash<int>
 {
 };
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX GroupId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX GroupId &group) const noexcept
+    {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, hash<int>()(group.type));
+        boost::hash_combine(seed, hash<int>()(group.x));
+        boost::hash_combine(seed, hash<int>()(group.y));
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX DecalId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX DecalId &decal) const noexcept
+    {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, hash<int>()(decal.type));
+        boost::hash_combine(seed, hash<int>()(decal.index));
+        return seed;
+    }
+};
+
 } // namespace std
diff --git a/ice40/bitstream.cc b/ice40/bitstream.cc
index 98a7a0e4..a62c6c09 100644
--- a/ice40/bitstream.cc
+++ b/ice40/bitstream.cc
@@ -341,9 +341,8 @@ void write_asc(const Context *ctx, std::ostream &out)
                             set_config(ti, config.at(y).at(x),
                                        "Cascade.IPCON_LC0" + std::to_string(lc_idx) + "_inmux02_5", true);
                         else
-                            set_config(ti, config.at(y).at(x),
-                                       "Cascade.MULT" + std::to_string(int(tile - TILE_DSP0)) + "_LC0" +
-                                               std::to_string(lc_idx) + "_inmux02_5",
+                            set_config(ti, config.at(y).at(x), "Cascade.MULT" + std::to_string(int(tile - TILE_DSP0)) +
+                                                                       "_LC0" + std::to_string(lc_idx) + "_inmux02_5",
                                        true);
                     }
                 }
diff --git a/ice40/chipdb.py b/ice40/chipdb.py
index 931c73d1..51fe169c 100644
--- a/ice40/chipdb.py
+++ b/ice40/chipdb.py
@@ -11,6 +11,7 @@ group.add_argument("-b", "--binary", action="store_true")
 group.add_argument("-c", "--c_file", action="store_true")
 parser.add_argument("filename", type=str, help="chipdb input filename")
 parser.add_argument("-p", "--portspins", type=str, help="path to portpins.inc")
+parser.add_argument("-g", "--gfxh", type=str, help="path to gfx.h")
 args = parser.parse_args()
 
 endianness = "le"
@@ -54,6 +55,9 @@ beltypes = dict()
 tiletypes = dict()
 wiretypes = dict()
 
+gfx_wire_ids = dict()
+wire_segments = dict()
+
 with open(args.portspins) as f:
     for line in f:
         line = line.replace("(", " ")
@@ -66,6 +70,20 @@ with open(args.portspins) as f:
         idx = len(portpins) + 1
         portpins[line[1]] = idx
 
+with open(args.gfxh) as f:
+    state = 0
+    for line in f:
+        if state == 0 and line.startswith("enum GfxTileWireId"):
+            state = 1
+        elif state == 1 and line.startswith("};"):
+            state = 0
+        elif state == 1 and (line.startswith("{") or line.strip() == ""):
+            pass
+        elif state == 1:
+            idx = len(gfx_wire_ids)
+            name = line.strip().rstrip(",")
+            gfx_wire_ids[name] = idx
+
 beltypes["ICESTORM_LC"] = 1
 beltypes["ICESTORM_RAM"] = 2
 beltypes["SB_IO"] = 3
@@ -371,6 +389,10 @@ with open(args.filename, "r") as f:
             if mode[1] not in wire_xy:
                 wire_xy[mode[1]] = list()
             wire_xy[mode[1]].append((int(line[0]), int(line[1])))
+            if mode[1] not in wire_segments:
+                wire_segments[mode[1]] = set()
+            if ("TILE_WIRE_" + wname[2].upper().replace("/", "_")) in gfx_wire_ids:
+                wire_segments[mode[1]].add((wname[0], wname[1], gfx_wire_ids["TILE_WIRE_" + wname[2].upper().replace("/", "_")]))
             continue
 
         if mode[0] in ("buffer", "routing"):
@@ -712,7 +734,7 @@ class BinaryBlobAssembler:
 
     def finalize(self):
         assert not self.finalized
-        for s, index in self.strings.items():
+        for s, index in sorted(self.strings.items()):
             self.l("str%d" % index, "char")
             for c in s:
                 self.data.append(ord(c))
@@ -947,7 +969,7 @@ for wire in range(num_wires):
     if wire in wire_downhill_belports:
         num_bels_downhill = len(wire_downhill_belports[wire])
         bba.l("wire%d_downbels" % wire, "BelPortPOD")
-        for belport in wire_downhill_belports[wire]:
+        for belport in sorted(wire_downhill_belports[wire]):
             bba.u32(belport[0], "bel_index")
             bba.u32(portpins[belport[1]], "port")
     else:
@@ -1040,7 +1062,7 @@ for t in range(num_tile_types):
     tileinfo.append(ti)
 
 bba.l("wire_data_%s" % dev_name, "WireInfoPOD")
-for info in wireinfo:
+for wire, info in enumerate(wireinfo):
     bba.s(info["name"], "name")
     bba.u32(info["num_uphill"], "num_uphill")
     bba.u32(info["num_downhill"], "num_downhill")
@@ -1050,11 +1072,24 @@ for info in wireinfo:
     bba.u32(info["uphill_bel"], "bel_uphill.bel_index")
     bba.u32(info["uphill_pin"], "bel_uphill.port")
     bba.r(info["list_bels_downhill"], "bels_downhill")
+    bba.u32(len(wire_segments[wire]), "num_segments")
+    if len(wire_segments[wire]):
+        bba.r("wire_segments_%d" % wire, "segments")
+    else:
+        bba.u32(0, "segments")
     bba.u8(info["x"], "x")
     bba.u8(info["y"], "y")
     bba.u8(wiretypes[wire_type(info["name"])], "type")
     bba.u8(0, "padding")
 
+for wire in range(num_wires):
+    if len(wire_segments[wire]):
+        bba.l("wire_segments_%d" % wire, "WireSegmentPOD")
+        for seg in sorted(wire_segments[wire]):
+            bba.u8(seg[0], "x")
+            bba.u8(seg[1], "y")
+            bba.u16(seg[2], "index")
+
 bba.l("pip_data_%s" % dev_name, "PipInfoPOD")
 for info in pipinfo:
     bba.u32(info["src"], "src")
diff --git a/ice40/family.cmake b/ice40/family.cmake
index e6cefecb..9af06f82 100644
--- a/ice40/family.cmake
+++ b/ice40/family.cmake
@@ -21,8 +21,9 @@ if (MSVC)
         set(DEV_TXT_DB ${ICEBOX_ROOT}/chipdb-${dev}.txt)
         set(DEV_CC_DB ${CMAKE_CURRENT_SOURCE_DIR}/ice40/chipdbs/chipdb-${dev}.bin)
         set(DEV_PORTS_INC ${CMAKE_CURRENT_SOURCE_DIR}/ice40/portpins.inc)
+        set(DEV_GFXH ${CMAKE_CURRENT_SOURCE_DIR}/ice40/gfx.h)
         add_custom_command(OUTPUT ${DEV_CC_DB}
-                COMMAND ${PYTHON_EXECUTABLE} ${DB_PY} -b -p ${DEV_PORTS_INC} ${DEV_TXT_DB} > ${DEV_CC_DB}
+                COMMAND ${PYTHON_EXECUTABLE} ${DB_PY} -b -p ${DEV_PORTS_INC} -g ${DEV_GFXH} ${DEV_TXT_DB} > ${DEV_CC_DB}
                 DEPENDS ${DEV_TXT_DB} ${DB_PY}
                 )
         target_sources(ice40_chipdb PRIVATE ${DEV_CC_DB})
@@ -37,8 +38,9 @@ else()
         set(DEV_TXT_DB ${ICEBOX_ROOT}/chipdb-${dev}.txt)
         set(DEV_CC_DB ${CMAKE_CURRENT_SOURCE_DIR}/ice40/chipdbs/chipdb-${dev}.cc)
         set(DEV_PORTS_INC ${CMAKE_CURRENT_SOURCE_DIR}/ice40/portpins.inc)
+        set(DEV_GFXH ${CMAKE_CURRENT_SOURCE_DIR}/ice40/gfx.h)
         add_custom_command(OUTPUT ${DEV_CC_DB}
-                COMMAND ${PYTHON_EXECUTABLE} ${DB_PY} -c -p ${DEV_PORTS_INC} ${DEV_TXT_DB} > ${DEV_CC_DB}.new
+                COMMAND ${PYTHON_EXECUTABLE} ${DB_PY} -c -p ${DEV_PORTS_INC} -g ${DEV_GFXH} ${DEV_TXT_DB} > ${DEV_CC_DB}.new
                 COMMAND mv ${DEV_CC_DB}.new ${DEV_CC_DB}
                 DEPENDS ${DEV_TXT_DB} ${DB_PY}
                 )
diff --git a/ice40/gfx.cc b/ice40/gfx.cc
new file mode 100644
index 00000000..19aaed13
--- /dev/null
+++ b/ice40/gfx.cc
@@ -0,0 +1,488 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "gfx.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+void gfxTileWire(std::vector<GraphicElement> &g, int x, int y, GfxTileWireId id, GraphicElement::style_t style)
+{
+    GraphicElement el;
+    el.type = GraphicElement::G_LINE;
+    el.style = style;
+
+    // Horizontal Span-4 Wires
+
+    if (id >= TILE_WIRE_SP4_H_L_36 && id <= TILE_WIRE_SP4_H_L_47) {
+        int idx = (id - TILE_WIRE_SP4_H_L_36) + 48;
+
+        float y1 = y + 1.0 - (0.03 + 0.0025 * (60 - (idx ^ 1)));
+        float y2 = y + 1.0 - (0.03 + 0.0025 * (60 - idx));
+
+        el.x1 = x;
+        el.x2 = x + 0.01;
+        el.y1 = y1;
+        el.y2 = y1;
+        g.push_back(el);
+
+        el.x1 = x + 0.01;
+        el.x2 = x + 0.02;
+        el.y1 = y1;
+        el.y2 = y2;
+        g.push_back(el);
+
+        el.x1 = x + 0.02;
+        el.x2 = x + 0.9;
+        el.y1 = y2;
+        el.y2 = y2;
+        g.push_back(el);
+
+        el.x1 = x + main_swbox_x1 + 0.0025 * (idx + 35);
+        el.x2 = el.x1;
+        el.y1 = y2;
+        el.y2 = y + main_swbox_y2;
+        g.push_back(el);
+    }
+
+    if (id >= TILE_WIRE_SP4_H_R_0 && id <= TILE_WIRE_SP4_H_R_47) {
+        int idx = id - TILE_WIRE_SP4_H_R_0;
+
+        float y1 = y + 1.0 - (0.03 + 0.0025 * (60 - idx));
+        float y2 = y + 1.0 - (0.03 + 0.0025 * (60 - (idx ^ 1)));
+        float y3 = y + 1.0 - (0.03 + 0.0025 * (60 - (idx ^ 1) - 12));
+
+        if (idx >= 12) {
+            el.x1 = x;
+            el.x2 = x + 0.01;
+            el.y1 = y1;
+            el.y2 = y1;
+            g.push_back(el);
+
+            el.x1 = x + 0.01;
+            el.x2 = x + 0.02;
+            el.y1 = y1;
+            el.y2 = y2;
+            g.push_back(el);
+        }
+
+        el.x1 = x + 0.02;
+        el.x2 = x + 0.9;
+        el.y1 = y2;
+        el.y2 = y2;
+        g.push_back(el);
+
+        el.x1 = x + 0.9;
+        el.x2 = x + 1.0;
+        el.y1 = y2;
+        el.y2 = y3;
+        g.push_back(el);
+
+        el.x1 = x + main_swbox_x1 + 0.0025 * ((idx ^ 1) + 35);
+        el.x2 = el.x1;
+        el.y1 = y2;
+        el.y2 = y + main_swbox_y2;
+        g.push_back(el);
+    }
+
+    // Vertical Span-4 Wires
+
+    if (id >= TILE_WIRE_SP4_V_T_36 && id <= TILE_WIRE_SP4_V_T_47) {
+        int idx = (id - TILE_WIRE_SP4_V_T_36) + 48;
+
+        float x1 = x + 0.03 + 0.0025 * (60 - (idx ^ 1));
+        float x2 = x + 0.03 + 0.0025 * (60 - idx);
+
+        el.y1 = y + 1.00;
+        el.y2 = y + 0.99;
+        el.x1 = x1;
+        el.x2 = x1;
+        g.push_back(el);
+
+        el.y1 = y + 0.99;
+        el.y2 = y + 0.98;
+        el.x1 = x1;
+        el.x2 = x2;
+        g.push_back(el);
+
+        el.y1 = y + 0.98;
+        el.y2 = y + 0.10;
+        el.x1 = x2;
+        el.x2 = x2;
+        g.push_back(el);
+
+        el.y1 = y + 1.0 - (0.03 + 0.0025 * (270 - idx));
+        el.y2 = el.y1;
+        el.x1 = x2;
+        el.x2 = x + main_swbox_x1;
+        g.push_back(el);
+    }
+
+    if (id >= TILE_WIRE_SP4_V_B_0 && id <= TILE_WIRE_SP4_V_B_47) {
+        int idx = id - TILE_WIRE_SP4_V_B_0;
+
+        float x1 = x + 0.03 + 0.0025 * (60 - idx);
+        float x2 = x + 0.03 + 0.0025 * (60 - (idx ^ 1));
+        float x3 = x + 0.03 + 0.0025 * (60 - (idx ^ 1) - 12);
+
+        if (idx >= 12) {
+            el.y1 = y + 1.00;
+            el.y2 = y + 0.99;
+            el.x1 = x1;
+            el.x2 = x1;
+            g.push_back(el);
+
+            el.y1 = y + 0.99;
+            el.y2 = y + 0.98;
+            el.x1 = x1;
+            el.x2 = x2;
+            g.push_back(el);
+        }
+
+        el.y1 = y + 0.98;
+        el.y2 = y + 0.10;
+        el.x1 = x2;
+        el.x2 = x2;
+        g.push_back(el);
+
+        el.y1 = y + 0.10;
+        el.y2 = y;
+        el.x1 = x2;
+        el.x2 = x3;
+        g.push_back(el);
+
+        el.y1 = y + 1.0 - (0.03 + 0.0025 * (145 - (idx ^ 1)));
+        el.y2 = el.y1;
+        el.x1 = x;
+        el.x2 = x2;
+        g.push_back(el);
+
+        el.y1 = y + 1.0 - (0.03 + 0.0025 * (270 - (idx ^ 1)));
+        el.y2 = el.y1;
+        el.x1 = x2;
+        el.x2 = x + main_swbox_x1;
+        g.push_back(el);
+    }
+
+    // Horizontal Span-12 Wires
+
+    if (id >= TILE_WIRE_SP12_H_L_22 && id <= TILE_WIRE_SP12_H_L_23) {
+        int idx = (id - TILE_WIRE_SP12_H_L_22) + 24;
+
+        float y1 = y + 1.0 - (0.03 + 0.0025 * (90 - (idx ^ 1)));
+        float y2 = y + 1.0 - (0.03 + 0.0025 * (90 - idx));
+
+        el.x1 = x;
+        el.x2 = x + 0.01;
+        el.y1 = y1;
+        el.y2 = y1;
+        g.push_back(el);
+
+        el.x1 = x + 0.01;
+        el.x2 = x + 0.02;
+        el.y1 = y1;
+        el.y2 = y2;
+        g.push_back(el);
+
+        el.x1 = x + 0.02;
+        el.x2 = x + 0.98333;
+        el.y1 = y2;
+        el.y2 = y2;
+        g.push_back(el);
+
+        el.x1 = x + main_swbox_x1 + 0.0025 * (idx + 5);
+        el.x2 = el.x1;
+        el.y1 = y2;
+        el.y2 = y + main_swbox_y2;
+        g.push_back(el);
+    }
+
+    if (id >= TILE_WIRE_SP12_H_R_0 && id <= TILE_WIRE_SP12_H_R_23) {
+        int idx = id - TILE_WIRE_SP12_H_R_0;
+
+        float y1 = y + 1.0 - (0.03 + 0.0025 * (90 - idx));
+        float y2 = y + 1.0 - (0.03 + 0.0025 * (90 - (idx ^ 1)));
+        float y3 = y + 1.0 - (0.03 + 0.0025 * (90 - (idx ^ 1) - 2));
+
+        if (idx >= 2) {
+            el.x1 = x;
+            el.x2 = x + 0.01;
+            el.y1 = y1;
+            el.y2 = y1;
+            g.push_back(el);
+
+            el.x1 = x + 0.01;
+            el.x2 = x + 0.02;
+            el.y1 = y1;
+            el.y2 = y2;
+            g.push_back(el);
+        }
+
+        el.x1 = x + 0.02;
+        el.x2 = x + 0.98333;
+        el.y1 = y2;
+        el.y2 = y2;
+        g.push_back(el);
+
+        el.x1 = x + 0.98333;
+        el.x2 = x + 1.0;
+        el.y1 = y2;
+        el.y2 = y3;
+        g.push_back(el);
+
+        el.x1 = x + main_swbox_x1 + 0.0025 * ((idx ^ 1) + 5);
+        el.x2 = el.x1;
+        el.y1 = y2;
+        el.y2 = y + main_swbox_y2;
+        g.push_back(el);
+    }
+
+    // Vertical Right Span-4
+
+    if (id >= TILE_WIRE_SP4_R_V_B_0 && id <= TILE_WIRE_SP4_R_V_B_47) {
+        int idx = id - TILE_WIRE_SP4_R_V_B_0;
+
+        float y1 = y + 1.0 - (0.03 + 0.0025 * (145 - (idx ^ 1)));
+
+        el.y1 = y1;
+        el.y2 = y1;
+        el.x1 = x + main_swbox_x2;
+        el.x2 = x + 1.0;
+        g.push_back(el);
+    }
+
+    // Vertical Span-12 Wires
+
+    if (id >= TILE_WIRE_SP12_V_T_22 && id <= TILE_WIRE_SP12_V_T_23) {
+        int idx = (id - TILE_WIRE_SP12_V_T_22) + 24;
+
+        float x1 = x + 0.03 + 0.0025 * (90 - (idx ^ 1));
+        float x2 = x + 0.03 + 0.0025 * (90 - idx);
+
+        el.y1 = y + 1.00;
+        el.y2 = y + 0.99;
+        el.x1 = x1;
+        el.x2 = x1;
+        g.push_back(el);
+
+        el.y1 = y + 0.99;
+        el.y2 = y + 0.98;
+        el.x1 = x1;
+        el.x2 = x2;
+        g.push_back(el);
+
+        el.y1 = y + 0.98;
+        el.y2 = y + 0.01667;
+        el.x1 = x2;
+        el.x2 = x2;
+        g.push_back(el);
+
+        el.y1 = y + 1.0 - (0.03 + 0.0025 * (300 - idx));
+        el.y2 = el.y1;
+        el.x1 = x2;
+        el.x2 = x + main_swbox_x1;
+        g.push_back(el);
+    }
+
+    if (id >= TILE_WIRE_SP12_V_B_0 && id <= TILE_WIRE_SP12_V_B_23) {
+        int idx = id - TILE_WIRE_SP12_V_B_0;
+
+        float x1 = x + 0.03 + 0.0025 * (90 - idx);
+        float x2 = x + 0.03 + 0.0025 * (90 - (idx ^ 1));
+        float x3 = x + 0.03 + 0.0025 * (90 - (idx ^ 1) - 2);
+
+        if (idx >= 2) {
+            el.y1 = y + 1.00;
+            el.y2 = y + 0.99;
+            el.x1 = x1;
+            el.x2 = x1;
+            g.push_back(el);
+
+            el.y1 = y + 0.99;
+            el.y2 = y + 0.98;
+            el.x1 = x1;
+            el.x2 = x2;
+            g.push_back(el);
+        }
+
+        el.y1 = y + 0.98;
+        el.y2 = y + 0.01667;
+        el.x1 = x2;
+        el.x2 = x2;
+        g.push_back(el);
+
+        el.y1 = y + 0.01667;
+        el.y2 = y;
+        el.x1 = x2;
+        el.x2 = x3;
+        g.push_back(el);
+
+        el.y1 = y + 1.0 - (0.03 + 0.0025 * (300 - (idx ^ 1)));
+        el.y2 = el.y1;
+        el.x1 = x2;
+        el.x2 = x + main_swbox_x1;
+        g.push_back(el);
+    }
+
+    // Global2Local
+
+    if (id >= TILE_WIRE_GLB2LOCAL_0 && id <= TILE_WIRE_GLB2LOCAL_3) {
+        int idx = id - TILE_WIRE_GLB2LOCAL_0;
+        el.x1 = x + main_swbox_x1 + 0.005 * (idx + 5);
+        el.x2 = el.x1;
+        el.y1 = y + main_swbox_y1;
+        el.y2 = el.y1 - 0.02;
+        g.push_back(el);
+    }
+
+    // GlobalNets
+
+    if (id >= TILE_WIRE_GLB_NETWK_0 && id <= TILE_WIRE_GLB_NETWK_7) {
+        int idx = id - TILE_WIRE_GLB_NETWK_0;
+        el.x1 = x + main_swbox_x1 - 0.05;
+        el.x2 = x + main_swbox_x1;
+        el.y1 = y + main_swbox_y1 + 0.005 * (13 - idx);
+        el.y2 = el.y1;
+        g.push_back(el);
+    }
+
+    // Neighbours
+
+    if (id >= TILE_WIRE_NEIGH_OP_BNL_0 && id <= TILE_WIRE_NEIGH_OP_TOP_7) {
+        int idx = id - TILE_WIRE_NEIGH_OP_BNL_0;
+        el.y1 = y + main_swbox_y2 - (0.0025 * (idx + 10) + 0.01 * (idx / 8));
+        el.y2 = el.y1;
+        el.x1 = x + main_swbox_x1 - 0.05;
+        el.x2 = x + main_swbox_x1;
+        g.push_back(el);
+    }
+
+    // Local Tracks
+
+    if (id >= TILE_WIRE_LOCAL_G0_0 && id <= TILE_WIRE_LOCAL_G3_7) {
+        int idx = id - TILE_WIRE_LOCAL_G0_0;
+        el.x1 = x + main_swbox_x2;
+        el.x2 = x + local_swbox_x1;
+        float yoff = y + (local_swbox_y1 + local_swbox_y2) / 2 - 0.005 * 16 - 0.075;
+        el.y1 = yoff + 0.005 * idx + 0.05 * (idx / 8);
+        el.y2 = el.y1;
+        g.push_back(el);
+    }
+
+    // LC Inputs
+
+    if (id >= TILE_WIRE_LUTFF_0_IN_0 && id <= TILE_WIRE_LUTFF_7_IN_3) {
+        int idx = id - TILE_WIRE_LUTFF_0_IN_0;
+        int z = idx / 4;
+        int input = idx % 4;
+        el.x1 = x + local_swbox_x2;
+        el.x2 = x + logic_cell_x1;
+        el.y1 = y + (logic_cell_y1 + logic_cell_y2) / 2 - 0.0075 + (0.005 * input) + z * logic_cell_pitch;
+        el.y2 = el.y1;
+        g.push_back(el);
+    }
+
+    // LC Outputs
+
+    if (id >= TILE_WIRE_LUTFF_0_OUT && id <= TILE_WIRE_LUTFF_7_OUT) {
+        int idx = id - TILE_WIRE_LUTFF_0_OUT;
+
+        float y1 = y + 1.0 - (0.03 + 0.0025 * (152 + idx));
+
+        el.y1 = y1;
+        el.y2 = y1;
+        el.x1 = x + main_swbox_x2;
+        el.x2 = x + 0.97 + 0.0025 * (7 - idx);
+        g.push_back(el);
+
+        el.y1 = y1;
+        el.y2 = y + (logic_cell_y1 + logic_cell_y2) / 2 + idx * logic_cell_pitch;
+        el.x1 = el.x2;
+        g.push_back(el);
+
+        el.y1 = el.y2;
+        el.x1 = x + logic_cell_x2;
+        g.push_back(el);
+    }
+
+    // LC Control
+
+    if (id >= TILE_WIRE_LUTFF_GLOBAL_CEN && id <= TILE_WIRE_LUTFF_GLOBAL_S_R) {
+        int idx = id - TILE_WIRE_LUTFF_GLOBAL_CEN;
+
+        el.x1 = x + main_swbox_x2 - 0.005 * (idx + 5);
+        el.x2 = el.x1;
+        el.y1 = y + main_swbox_y1;
+        el.y2 = el.y1 - 0.005 * (idx + 2);
+        g.push_back(el);
+
+        el.y1 = el.y2;
+        el.x2 = x + logic_cell_x2 - 0.005 * (2 - idx + 5);
+        g.push_back(el);
+
+        el.y2 = y + logic_cell_y1;
+        el.x1 = el.x2;
+        g.push_back(el);
+
+        for (int i = 0; i < 7; i++) {
+            el.y1 = y + logic_cell_y2 + i * logic_cell_pitch;
+            el.y2 = y + logic_cell_y1 + (i + 1) * logic_cell_pitch;
+            g.push_back(el);
+        }
+    }
+
+    // LC Cascade
+
+    if (id >= TILE_WIRE_LUTFF_0_LOUT && id <= TILE_WIRE_LUTFF_6_LOUT) {
+        int idx = id - TILE_WIRE_LUTFF_0_LOUT;
+        el.x1 = x + logic_cell_x1 + 0.005 * 5;
+        el.x2 = el.x1;
+        el.y1 = y + logic_cell_y2 + idx * logic_cell_pitch;
+        el.y2 = y + logic_cell_y1 + (idx + 1) * logic_cell_pitch;
+        g.push_back(el);
+    }
+
+    // Carry Chain
+
+    if (id >= TILE_WIRE_LUTFF_0_COUT && id <= TILE_WIRE_LUTFF_7_COUT) {
+        int idx = id - TILE_WIRE_LUTFF_0_COUT;
+        el.x1 = x + logic_cell_x1 + 0.005 * 3;
+        el.x2 = el.x1;
+        el.y1 = y + logic_cell_y2 + idx * logic_cell_pitch;
+        el.y2 = y + (idx < 7 ? logic_cell_y1 + (idx + 1) * logic_cell_pitch : 1.0);
+        g.push_back(el);
+    }
+
+    if (id == TILE_WIRE_CARRY_IN) {
+        el.x1 = x + logic_cell_x1 + 0.005 * 3;
+        el.x2 = el.x1;
+        el.y1 = y;
+        el.y2 = y + 0.01;
+        g.push_back(el);
+    }
+
+    if (id == TILE_WIRE_CARRY_IN_MUX) {
+        el.x1 = x + logic_cell_x1 + 0.005 * 3;
+        el.x2 = el.x1;
+        el.y1 = y + 0.02;
+        el.y2 = y + logic_cell_y1;
+        g.push_back(el);
+    }
+}
+
+NEXTPNR_NAMESPACE_END
diff --git a/ice40/gfx.h b/ice40/gfx.h
new file mode 100644
index 00000000..a65f7683
--- /dev/null
+++ b/ice40/gfx.h
@@ -0,0 +1,474 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef GFX_H
+#define GFX_H
+
+#include "nextpnr.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+const float main_swbox_x1 = 0.35;
+const float main_swbox_x2 = 0.60;
+const float main_swbox_y1 = 0.05;
+const float main_swbox_y2 = 0.73;
+
+const float local_swbox_x1 = 0.63;
+const float local_swbox_x2 = 0.73;
+const float local_swbox_y1 = 0.05;
+const float local_swbox_y2 = 0.55;
+
+const float logic_cell_x1 = 0.76;
+const float logic_cell_x2 = 0.95;
+const float logic_cell_y1 = 0.05;
+const float logic_cell_y2 = 0.10;
+const float logic_cell_pitch = 0.0625;
+
+enum GfxTileWireId
+{
+    TILE_WIRE_GLB2LOCAL_0,
+    TILE_WIRE_GLB2LOCAL_1,
+    TILE_WIRE_GLB2LOCAL_2,
+    TILE_WIRE_GLB2LOCAL_3,
+
+    TILE_WIRE_GLB_NETWK_0,
+    TILE_WIRE_GLB_NETWK_1,
+    TILE_WIRE_GLB_NETWK_2,
+    TILE_WIRE_GLB_NETWK_3,
+    TILE_WIRE_GLB_NETWK_4,
+    TILE_WIRE_GLB_NETWK_5,
+    TILE_WIRE_GLB_NETWK_6,
+    TILE_WIRE_GLB_NETWK_7,
+
+    TILE_WIRE_LOCAL_G0_0,
+    TILE_WIRE_LOCAL_G0_1,
+    TILE_WIRE_LOCAL_G0_2,
+    TILE_WIRE_LOCAL_G0_3,
+    TILE_WIRE_LOCAL_G0_4,
+    TILE_WIRE_LOCAL_G0_5,
+    TILE_WIRE_LOCAL_G0_6,
+    TILE_WIRE_LOCAL_G0_7,
+
+    TILE_WIRE_LOCAL_G1_0,
+    TILE_WIRE_LOCAL_G1_1,
+    TILE_WIRE_LOCAL_G1_2,
+    TILE_WIRE_LOCAL_G1_3,
+    TILE_WIRE_LOCAL_G1_4,
+    TILE_WIRE_LOCAL_G1_5,
+    TILE_WIRE_LOCAL_G1_6,
+    TILE_WIRE_LOCAL_G1_7,
+
+    TILE_WIRE_LOCAL_G2_0,
+    TILE_WIRE_LOCAL_G2_1,
+    TILE_WIRE_LOCAL_G2_2,
+    TILE_WIRE_LOCAL_G2_3,
+    TILE_WIRE_LOCAL_G2_4,
+    TILE_WIRE_LOCAL_G2_5,
+    TILE_WIRE_LOCAL_G2_6,
+    TILE_WIRE_LOCAL_G2_7,
+
+    TILE_WIRE_LOCAL_G3_0,
+    TILE_WIRE_LOCAL_G3_1,
+    TILE_WIRE_LOCAL_G3_2,
+    TILE_WIRE_LOCAL_G3_3,
+    TILE_WIRE_LOCAL_G3_4,
+    TILE_WIRE_LOCAL_G3_5,
+    TILE_WIRE_LOCAL_G3_6,
+    TILE_WIRE_LOCAL_G3_7,
+
+    TILE_WIRE_CARRY_IN,
+    TILE_WIRE_CARRY_IN_MUX,
+
+    TILE_WIRE_LUTFF_0_IN_0,
+    TILE_WIRE_LUTFF_0_IN_1,
+    TILE_WIRE_LUTFF_0_IN_2,
+    TILE_WIRE_LUTFF_0_IN_3,
+
+    TILE_WIRE_LUTFF_1_IN_0,
+    TILE_WIRE_LUTFF_1_IN_1,
+    TILE_WIRE_LUTFF_1_IN_2,
+    TILE_WIRE_LUTFF_1_IN_3,
+
+    TILE_WIRE_LUTFF_2_IN_0,
+    TILE_WIRE_LUTFF_2_IN_1,
+    TILE_WIRE_LUTFF_2_IN_2,
+    TILE_WIRE_LUTFF_2_IN_3,
+
+    TILE_WIRE_LUTFF_3_IN_0,
+    TILE_WIRE_LUTFF_3_IN_1,
+    TILE_WIRE_LUTFF_3_IN_2,
+    TILE_WIRE_LUTFF_3_IN_3,
+
+    TILE_WIRE_LUTFF_4_IN_0,
+    TILE_WIRE_LUTFF_4_IN_1,
+    TILE_WIRE_LUTFF_4_IN_2,
+    TILE_WIRE_LUTFF_4_IN_3,
+
+    TILE_WIRE_LUTFF_5_IN_0,
+    TILE_WIRE_LUTFF_5_IN_1,
+    TILE_WIRE_LUTFF_5_IN_2,
+    TILE_WIRE_LUTFF_5_IN_3,
+
+    TILE_WIRE_LUTFF_6_IN_0,
+    TILE_WIRE_LUTFF_6_IN_1,
+    TILE_WIRE_LUTFF_6_IN_2,
+    TILE_WIRE_LUTFF_6_IN_3,
+
+    TILE_WIRE_LUTFF_7_IN_0,
+    TILE_WIRE_LUTFF_7_IN_1,
+    TILE_WIRE_LUTFF_7_IN_2,
+    TILE_WIRE_LUTFF_7_IN_3,
+
+    TILE_WIRE_LUTFF_0_LOUT,
+    TILE_WIRE_LUTFF_1_LOUT,
+    TILE_WIRE_LUTFF_2_LOUT,
+    TILE_WIRE_LUTFF_3_LOUT,
+    TILE_WIRE_LUTFF_4_LOUT,
+    TILE_WIRE_LUTFF_5_LOUT,
+    TILE_WIRE_LUTFF_6_LOUT,
+
+    TILE_WIRE_LUTFF_0_OUT,
+    TILE_WIRE_LUTFF_1_OUT,
+    TILE_WIRE_LUTFF_2_OUT,
+    TILE_WIRE_LUTFF_3_OUT,
+    TILE_WIRE_LUTFF_4_OUT,
+    TILE_WIRE_LUTFF_5_OUT,
+    TILE_WIRE_LUTFF_6_OUT,
+    TILE_WIRE_LUTFF_7_OUT,
+
+    TILE_WIRE_LUTFF_0_COUT,
+    TILE_WIRE_LUTFF_1_COUT,
+    TILE_WIRE_LUTFF_2_COUT,
+    TILE_WIRE_LUTFF_3_COUT,
+    TILE_WIRE_LUTFF_4_COUT,
+    TILE_WIRE_LUTFF_5_COUT,
+    TILE_WIRE_LUTFF_6_COUT,
+    TILE_WIRE_LUTFF_7_COUT,
+
+    TILE_WIRE_LUTFF_GLOBAL_CEN,
+    TILE_WIRE_LUTFF_GLOBAL_CLK,
+    TILE_WIRE_LUTFF_GLOBAL_S_R,
+
+    TILE_WIRE_NEIGH_OP_BNL_0,
+    TILE_WIRE_NEIGH_OP_BNL_1,
+    TILE_WIRE_NEIGH_OP_BNL_2,
+    TILE_WIRE_NEIGH_OP_BNL_3,
+    TILE_WIRE_NEIGH_OP_BNL_4,
+    TILE_WIRE_NEIGH_OP_BNL_5,
+    TILE_WIRE_NEIGH_OP_BNL_6,
+    TILE_WIRE_NEIGH_OP_BNL_7,
+
+    TILE_WIRE_NEIGH_OP_BNR_0,
+    TILE_WIRE_NEIGH_OP_BNR_1,
+    TILE_WIRE_NEIGH_OP_BNR_2,
+    TILE_WIRE_NEIGH_OP_BNR_3,
+    TILE_WIRE_NEIGH_OP_BNR_4,
+    TILE_WIRE_NEIGH_OP_BNR_5,
+    TILE_WIRE_NEIGH_OP_BNR_6,
+    TILE_WIRE_NEIGH_OP_BNR_7,
+
+    TILE_WIRE_NEIGH_OP_BOT_0,
+    TILE_WIRE_NEIGH_OP_BOT_1,
+    TILE_WIRE_NEIGH_OP_BOT_2,
+    TILE_WIRE_NEIGH_OP_BOT_3,
+    TILE_WIRE_NEIGH_OP_BOT_4,
+    TILE_WIRE_NEIGH_OP_BOT_5,
+    TILE_WIRE_NEIGH_OP_BOT_6,
+    TILE_WIRE_NEIGH_OP_BOT_7,
+
+    TILE_WIRE_NEIGH_OP_LFT_0,
+    TILE_WIRE_NEIGH_OP_LFT_1,
+    TILE_WIRE_NEIGH_OP_LFT_2,
+    TILE_WIRE_NEIGH_OP_LFT_3,
+    TILE_WIRE_NEIGH_OP_LFT_4,
+    TILE_WIRE_NEIGH_OP_LFT_5,
+    TILE_WIRE_NEIGH_OP_LFT_6,
+    TILE_WIRE_NEIGH_OP_LFT_7,
+
+    TILE_WIRE_NEIGH_OP_RGT_0,
+    TILE_WIRE_NEIGH_OP_RGT_1,
+    TILE_WIRE_NEIGH_OP_RGT_2,
+    TILE_WIRE_NEIGH_OP_RGT_3,
+    TILE_WIRE_NEIGH_OP_RGT_4,
+    TILE_WIRE_NEIGH_OP_RGT_5,
+    TILE_WIRE_NEIGH_OP_RGT_6,
+    TILE_WIRE_NEIGH_OP_RGT_7,
+
+    TILE_WIRE_NEIGH_OP_TNL_0,
+    TILE_WIRE_NEIGH_OP_TNL_1,
+    TILE_WIRE_NEIGH_OP_TNL_2,
+    TILE_WIRE_NEIGH_OP_TNL_3,
+    TILE_WIRE_NEIGH_OP_TNL_4,
+    TILE_WIRE_NEIGH_OP_TNL_5,
+    TILE_WIRE_NEIGH_OP_TNL_6,
+    TILE_WIRE_NEIGH_OP_TNL_7,
+
+    TILE_WIRE_NEIGH_OP_TNR_0,
+    TILE_WIRE_NEIGH_OP_TNR_1,
+    TILE_WIRE_NEIGH_OP_TNR_2,
+    TILE_WIRE_NEIGH_OP_TNR_3,
+    TILE_WIRE_NEIGH_OP_TNR_4,
+    TILE_WIRE_NEIGH_OP_TNR_5,
+    TILE_WIRE_NEIGH_OP_TNR_6,
+    TILE_WIRE_NEIGH_OP_TNR_7,
+
+    TILE_WIRE_NEIGH_OP_TOP_0,
+    TILE_WIRE_NEIGH_OP_TOP_1,
+    TILE_WIRE_NEIGH_OP_TOP_2,
+    TILE_WIRE_NEIGH_OP_TOP_3,
+    TILE_WIRE_NEIGH_OP_TOP_4,
+    TILE_WIRE_NEIGH_OP_TOP_5,
+    TILE_WIRE_NEIGH_OP_TOP_6,
+    TILE_WIRE_NEIGH_OP_TOP_7,
+
+    TILE_WIRE_SP4_V_B_0,
+    TILE_WIRE_SP4_V_B_1,
+    TILE_WIRE_SP4_V_B_2,
+    TILE_WIRE_SP4_V_B_3,
+    TILE_WIRE_SP4_V_B_4,
+    TILE_WIRE_SP4_V_B_5,
+    TILE_WIRE_SP4_V_B_6,
+    TILE_WIRE_SP4_V_B_7,
+    TILE_WIRE_SP4_V_B_8,
+    TILE_WIRE_SP4_V_B_9,
+    TILE_WIRE_SP4_V_B_10,
+    TILE_WIRE_SP4_V_B_11,
+    TILE_WIRE_SP4_V_B_12,
+    TILE_WIRE_SP4_V_B_13,
+    TILE_WIRE_SP4_V_B_14,
+    TILE_WIRE_SP4_V_B_15,
+    TILE_WIRE_SP4_V_B_16,
+    TILE_WIRE_SP4_V_B_17,
+    TILE_WIRE_SP4_V_B_18,
+    TILE_WIRE_SP4_V_B_19,
+    TILE_WIRE_SP4_V_B_20,
+    TILE_WIRE_SP4_V_B_21,
+    TILE_WIRE_SP4_V_B_22,
+    TILE_WIRE_SP4_V_B_23,
+    TILE_WIRE_SP4_V_B_24,
+    TILE_WIRE_SP4_V_B_25,
+    TILE_WIRE_SP4_V_B_26,
+    TILE_WIRE_SP4_V_B_27,
+    TILE_WIRE_SP4_V_B_28,
+    TILE_WIRE_SP4_V_B_29,
+    TILE_WIRE_SP4_V_B_30,
+    TILE_WIRE_SP4_V_B_31,
+    TILE_WIRE_SP4_V_B_32,
+    TILE_WIRE_SP4_V_B_33,
+    TILE_WIRE_SP4_V_B_34,
+    TILE_WIRE_SP4_V_B_35,
+    TILE_WIRE_SP4_V_B_36,
+    TILE_WIRE_SP4_V_B_37,
+    TILE_WIRE_SP4_V_B_38,
+    TILE_WIRE_SP4_V_B_39,
+    TILE_WIRE_SP4_V_B_40,
+    TILE_WIRE_SP4_V_B_41,
+    TILE_WIRE_SP4_V_B_42,
+    TILE_WIRE_SP4_V_B_43,
+    TILE_WIRE_SP4_V_B_44,
+    TILE_WIRE_SP4_V_B_45,
+    TILE_WIRE_SP4_V_B_46,
+    TILE_WIRE_SP4_V_B_47,
+
+    TILE_WIRE_SP4_V_T_36,
+    TILE_WIRE_SP4_V_T_37,
+    TILE_WIRE_SP4_V_T_38,
+    TILE_WIRE_SP4_V_T_39,
+    TILE_WIRE_SP4_V_T_40,
+    TILE_WIRE_SP4_V_T_41,
+    TILE_WIRE_SP4_V_T_42,
+    TILE_WIRE_SP4_V_T_43,
+    TILE_WIRE_SP4_V_T_44,
+    TILE_WIRE_SP4_V_T_45,
+    TILE_WIRE_SP4_V_T_46,
+    TILE_WIRE_SP4_V_T_47,
+
+    TILE_WIRE_SP4_R_V_B_0,
+    TILE_WIRE_SP4_R_V_B_1,
+    TILE_WIRE_SP4_R_V_B_2,
+    TILE_WIRE_SP4_R_V_B_3,
+    TILE_WIRE_SP4_R_V_B_4,
+    TILE_WIRE_SP4_R_V_B_5,
+    TILE_WIRE_SP4_R_V_B_6,
+    TILE_WIRE_SP4_R_V_B_7,
+    TILE_WIRE_SP4_R_V_B_8,
+    TILE_WIRE_SP4_R_V_B_9,
+    TILE_WIRE_SP4_R_V_B_10,
+    TILE_WIRE_SP4_R_V_B_11,
+    TILE_WIRE_SP4_R_V_B_12,
+    TILE_WIRE_SP4_R_V_B_13,
+    TILE_WIRE_SP4_R_V_B_14,
+    TILE_WIRE_SP4_R_V_B_15,
+    TILE_WIRE_SP4_R_V_B_16,
+    TILE_WIRE_SP4_R_V_B_17,
+    TILE_WIRE_SP4_R_V_B_18,
+    TILE_WIRE_SP4_R_V_B_19,
+    TILE_WIRE_SP4_R_V_B_20,
+    TILE_WIRE_SP4_R_V_B_21,
+    TILE_WIRE_SP4_R_V_B_22,
+    TILE_WIRE_SP4_R_V_B_23,
+    TILE_WIRE_SP4_R_V_B_24,
+    TILE_WIRE_SP4_R_V_B_25,
+    TILE_WIRE_SP4_R_V_B_26,
+    TILE_WIRE_SP4_R_V_B_27,
+    TILE_WIRE_SP4_R_V_B_28,
+    TILE_WIRE_SP4_R_V_B_29,
+    TILE_WIRE_SP4_R_V_B_30,
+    TILE_WIRE_SP4_R_V_B_31,
+    TILE_WIRE_SP4_R_V_B_32,
+    TILE_WIRE_SP4_R_V_B_33,
+    TILE_WIRE_SP4_R_V_B_34,
+    TILE_WIRE_SP4_R_V_B_35,
+    TILE_WIRE_SP4_R_V_B_36,
+    TILE_WIRE_SP4_R_V_B_37,
+    TILE_WIRE_SP4_R_V_B_38,
+    TILE_WIRE_SP4_R_V_B_39,
+    TILE_WIRE_SP4_R_V_B_40,
+    TILE_WIRE_SP4_R_V_B_41,
+    TILE_WIRE_SP4_R_V_B_42,
+    TILE_WIRE_SP4_R_V_B_43,
+    TILE_WIRE_SP4_R_V_B_44,
+    TILE_WIRE_SP4_R_V_B_45,
+    TILE_WIRE_SP4_R_V_B_46,
+    TILE_WIRE_SP4_R_V_B_47,
+
+    TILE_WIRE_SP4_H_L_36,
+    TILE_WIRE_SP4_H_L_37,
+    TILE_WIRE_SP4_H_L_38,
+    TILE_WIRE_SP4_H_L_39,
+    TILE_WIRE_SP4_H_L_40,
+    TILE_WIRE_SP4_H_L_41,
+    TILE_WIRE_SP4_H_L_42,
+    TILE_WIRE_SP4_H_L_43,
+    TILE_WIRE_SP4_H_L_44,
+    TILE_WIRE_SP4_H_L_45,
+    TILE_WIRE_SP4_H_L_46,
+    TILE_WIRE_SP4_H_L_47,
+
+    TILE_WIRE_SP4_H_R_0,
+    TILE_WIRE_SP4_H_R_1,
+    TILE_WIRE_SP4_H_R_2,
+    TILE_WIRE_SP4_H_R_3,
+    TILE_WIRE_SP4_H_R_4,
+    TILE_WIRE_SP4_H_R_5,
+    TILE_WIRE_SP4_H_R_6,
+    TILE_WIRE_SP4_H_R_7,
+    TILE_WIRE_SP4_H_R_8,
+    TILE_WIRE_SP4_H_R_9,
+    TILE_WIRE_SP4_H_R_10,
+    TILE_WIRE_SP4_H_R_11,
+    TILE_WIRE_SP4_H_R_12,
+    TILE_WIRE_SP4_H_R_13,
+    TILE_WIRE_SP4_H_R_14,
+    TILE_WIRE_SP4_H_R_15,
+    TILE_WIRE_SP4_H_R_16,
+    TILE_WIRE_SP4_H_R_17,
+    TILE_WIRE_SP4_H_R_18,
+    TILE_WIRE_SP4_H_R_19,
+    TILE_WIRE_SP4_H_R_20,
+    TILE_WIRE_SP4_H_R_21,
+    TILE_WIRE_SP4_H_R_22,
+    TILE_WIRE_SP4_H_R_23,
+    TILE_WIRE_SP4_H_R_24,
+    TILE_WIRE_SP4_H_R_25,
+    TILE_WIRE_SP4_H_R_26,
+    TILE_WIRE_SP4_H_R_27,
+    TILE_WIRE_SP4_H_R_28,
+    TILE_WIRE_SP4_H_R_29,
+    TILE_WIRE_SP4_H_R_30,
+    TILE_WIRE_SP4_H_R_31,
+    TILE_WIRE_SP4_H_R_32,
+    TILE_WIRE_SP4_H_R_33,
+    TILE_WIRE_SP4_H_R_34,
+    TILE_WIRE_SP4_H_R_35,
+    TILE_WIRE_SP4_H_R_36,
+    TILE_WIRE_SP4_H_R_37,
+    TILE_WIRE_SP4_H_R_38,
+    TILE_WIRE_SP4_H_R_39,
+    TILE_WIRE_SP4_H_R_40,
+    TILE_WIRE_SP4_H_R_41,
+    TILE_WIRE_SP4_H_R_42,
+    TILE_WIRE_SP4_H_R_43,
+    TILE_WIRE_SP4_H_R_44,
+    TILE_WIRE_SP4_H_R_45,
+    TILE_WIRE_SP4_H_R_46,
+    TILE_WIRE_SP4_H_R_47,
+
+    TILE_WIRE_SP12_V_B_0,
+    TILE_WIRE_SP12_V_B_1,
+    TILE_WIRE_SP12_V_B_2,
+    TILE_WIRE_SP12_V_B_3,
+    TILE_WIRE_SP12_V_B_4,
+    TILE_WIRE_SP12_V_B_5,
+    TILE_WIRE_SP12_V_B_6,
+    TILE_WIRE_SP12_V_B_7,
+    TILE_WIRE_SP12_V_B_8,
+    TILE_WIRE_SP12_V_B_9,
+    TILE_WIRE_SP12_V_B_10,
+    TILE_WIRE_SP12_V_B_11,
+    TILE_WIRE_SP12_V_B_12,
+    TILE_WIRE_SP12_V_B_13,
+    TILE_WIRE_SP12_V_B_14,
+    TILE_WIRE_SP12_V_B_15,
+    TILE_WIRE_SP12_V_B_16,
+    TILE_WIRE_SP12_V_B_17,
+    TILE_WIRE_SP12_V_B_18,
+    TILE_WIRE_SP12_V_B_19,
+    TILE_WIRE_SP12_V_B_20,
+    TILE_WIRE_SP12_V_B_21,
+    TILE_WIRE_SP12_V_B_22,
+    TILE_WIRE_SP12_V_B_23,
+
+    TILE_WIRE_SP12_V_T_22,
+    TILE_WIRE_SP12_V_T_23,
+
+    TILE_WIRE_SP12_H_R_0,
+    TILE_WIRE_SP12_H_R_1,
+    TILE_WIRE_SP12_H_R_2,
+    TILE_WIRE_SP12_H_R_3,
+    TILE_WIRE_SP12_H_R_4,
+    TILE_WIRE_SP12_H_R_5,
+    TILE_WIRE_SP12_H_R_6,
+    TILE_WIRE_SP12_H_R_7,
+    TILE_WIRE_SP12_H_R_8,
+    TILE_WIRE_SP12_H_R_9,
+    TILE_WIRE_SP12_H_R_10,
+    TILE_WIRE_SP12_H_R_11,
+    TILE_WIRE_SP12_H_R_12,
+    TILE_WIRE_SP12_H_R_13,
+    TILE_WIRE_SP12_H_R_14,
+    TILE_WIRE_SP12_H_R_15,
+    TILE_WIRE_SP12_H_R_16,
+    TILE_WIRE_SP12_H_R_17,
+    TILE_WIRE_SP12_H_R_18,
+    TILE_WIRE_SP12_H_R_19,
+    TILE_WIRE_SP12_H_R_20,
+    TILE_WIRE_SP12_H_R_21,
+    TILE_WIRE_SP12_H_R_22,
+    TILE_WIRE_SP12_H_R_23,
+
+    TILE_WIRE_SP12_H_L_22,
+    TILE_WIRE_SP12_H_L_23
+};
+
+void gfxTileWire(std::vector<GraphicElement> &g, int x, int y, GfxTileWireId id, GraphicElement::style_t style);
+
+NEXTPNR_NAMESPACE_END
+
+#endif // GFX_H
diff --git a/ice40/main.cc b/ice40/main.cc
index 87a32ded..e77bdd34 100644
--- a/ice40/main.cc
+++ b/ice40/main.cc
@@ -39,30 +39,30 @@
 #include "jsonparse.h"
 #include "log.h"
 #include "nextpnr.h"
-#include "pack.h"
 #include "pcf.h"
 #include "place_legaliser.h"
-#include "place_sa.h"
-#include "route.h"
 #include "timing.h"
 #include "version.h"
 
 USING_NEXTPNR_NAMESPACE
 
-void svg_dump_el(const GraphicElement &el)
+void svg_dump_decal(const Context *ctx, const DecalXY &decal)
 {
-    float scale = 10.0, offset = 10.0;
-    std::string style = "stroke=\"black\" stroke-width=\"0.1\" fill=\"none\"";
+    const float scale = 10.0, offset = 10.0;
+    const std::string style = "stroke=\"black\" stroke-width=\"0.1\" fill=\"none\"";
 
-    if (el.type == GraphicElement::G_BOX) {
-        std::cout << "<rect x=\"" << (offset + scale * el.x1) << "\" y=\"" << (offset + scale * el.y1) << "\" height=\""
-                  << (scale * (el.y2 - el.y1)) << "\" width=\"" << (scale * (el.x2 - el.x1)) << "\" " << style
-                  << "/>\n";
-    }
+    for (auto &el : ctx->getDecalGraphics(decal.decal)) {
+        if (el.type == GraphicElement::G_BOX) {
+            std::cout << "<rect x=\"" << (offset + scale * (decal.x + el.x1)) << "\" y=\""
+                      << (offset + scale * (decal.y + el.y1)) << "\" height=\"" << (scale * (el.y2 - el.y1))
+                      << "\" width=\"" << (scale * (el.x2 - el.x1)) << "\" " << style << "/>\n";
+        }
 
-    if (el.type == GraphicElement::G_LINE) {
-        std::cout << "<line x1=\"" << (offset + scale * el.x1) << "\" y1=\"" << (offset + scale * el.y1) << "\" x2=\""
-                  << (offset + scale * el.x2) << "\" y2=\"" << (offset + scale * el.y2) << "\" " << style << "/>\n";
+        if (el.type == GraphicElement::G_LINE) {
+            std::cout << "<line x1=\"" << (offset + scale * (decal.x + el.x1)) << "\" y1=\""
+                      << (offset + scale * (decal.y + el.y1)) << "\" x2=\"" << (offset + scale * (decal.x + el.x2))
+                      << "\" y2=\"" << (offset + scale * (decal.y + el.y2)) << "\" " << style << "/>\n";
+        }
     }
 }
 
@@ -98,12 +98,16 @@ int main(int argc, char *argv[])
         options.add_options()("seed", po::value<int>(), "seed value for random number generator");
         options.add_options()("version,V", "show version");
         options.add_options()("tmfuzz", "run path delay estimate fuzzer");
+#ifdef ICE40_HX1K_ONLY
+        options.add_options()("hx1k", "set device type to iCE40HX1K");
+#else
         options.add_options()("lp384", "set device type to iCE40LP384");
         options.add_options()("lp1k", "set device type to iCE40LP1K");
         options.add_options()("lp8k", "set device type to iCE40LP8K");
         options.add_options()("hx1k", "set device type to iCE40HX1K");
         options.add_options()("hx8k", "set device type to iCE40HX8K");
         options.add_options()("up5k", "set device type to iCE40UP5K");
+#endif
         options.add_options()("freq", po::value<double>(), "set target frequency for design in MHz");
         options.add_options()("no-tmdriv", "disable timing-driven placement");
         options.add_options()("package", po::value<std::string>(), "set device package");
@@ -267,112 +271,126 @@ int main(int argc, char *argv[])
             return 1;
         }
 
-        Context ctx(chipArgs);
+        std::unique_ptr<Context> ctx = std::unique_ptr<Context>(new Context(chipArgs));
 
         if (vm.count("verbose")) {
-            ctx.verbose = true;
+            ctx->verbose = true;
         }
 
         if (vm.count("debug")) {
-            ctx.verbose = true;
-            ctx.debug = true;
+            ctx->verbose = true;
+            ctx->debug = true;
         }
 
         if (vm.count("force")) {
-            ctx.force = true;
+            ctx->force = true;
         }
 
         if (vm.count("seed")) {
-            ctx.rngseed(vm["seed"].as<int>());
+            ctx->rngseed(vm["seed"].as<int>());
         }
 
         if (vm.count("svg")) {
             std::cout << "<svg xmlns=\"http://www.w3.org/2000/svg\" "
                          "xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n";
-            for (auto bel : ctx.getBels()) {
-                std::cout << "<!-- " << ctx.getBelName(bel).str(&ctx) << " -->\n";
-                for (auto &el : ctx.getBelGraphics(bel))
-                    svg_dump_el(el);
+            for (auto bel : ctx->getBels()) {
+                std::cout << "<!-- " << ctx->getBelName(bel).str(ctx.get()) << " -->\n";
+                svg_dump_decal(ctx.get(), ctx->getBelDecal(bel));
             }
             std::cout << "<!-- Frame -->\n";
-            for (auto &el : ctx.getFrameGraphics())
-                svg_dump_el(el);
+            svg_dump_decal(ctx.get(), ctx->getFrameDecal());
             std::cout << "</svg>\n";
         }
 
         if (vm.count("tmfuzz")) {
             std::vector<WireId> src_wires, dst_wires;
 
-            /*for (auto w : ctx.getWires())
+            /*for (auto w : ctx->getWires())
                 src_wires.push_back(w);*/
-            for (auto b : ctx.getBels()) {
-                if (ctx.getBelType(b) == TYPE_ICESTORM_LC) {
-                    src_wires.push_back(ctx.getWireBelPin(b, PIN_O));
+            for (auto b : ctx->getBels()) {
+                if (ctx->getBelType(b) == TYPE_ICESTORM_LC) {
+                    src_wires.push_back(ctx->getWireBelPin(b, PIN_O));
                 }
-                if (ctx.getBelType(b) == TYPE_SB_IO) {
-                    src_wires.push_back(ctx.getWireBelPin(b, PIN_D_IN_0));
+                if (ctx->getBelType(b) == TYPE_SB_IO) {
+                    src_wires.push_back(ctx->getWireBelPin(b, PIN_D_IN_0));
                 }
             }
 
-            for (auto b : ctx.getBels()) {
-                if (ctx.getBelType(b) == TYPE_ICESTORM_LC) {
-                    dst_wires.push_back(ctx.getWireBelPin(b, PIN_I0));
-                    dst_wires.push_back(ctx.getWireBelPin(b, PIN_I1));
-                    dst_wires.push_back(ctx.getWireBelPin(b, PIN_I2));
-                    dst_wires.push_back(ctx.getWireBelPin(b, PIN_I3));
-                    dst_wires.push_back(ctx.getWireBelPin(b, PIN_CEN));
-                    dst_wires.push_back(ctx.getWireBelPin(b, PIN_CIN));
+            for (auto b : ctx->getBels()) {
+                if (ctx->getBelType(b) == TYPE_ICESTORM_LC) {
+                    dst_wires.push_back(ctx->getWireBelPin(b, PIN_I0));
+                    dst_wires.push_back(ctx->getWireBelPin(b, PIN_I1));
+                    dst_wires.push_back(ctx->getWireBelPin(b, PIN_I2));
+                    dst_wires.push_back(ctx->getWireBelPin(b, PIN_I3));
+                    dst_wires.push_back(ctx->getWireBelPin(b, PIN_CEN));
+                    dst_wires.push_back(ctx->getWireBelPin(b, PIN_CIN));
                 }
-                if (ctx.getBelType(b) == TYPE_SB_IO) {
-                    dst_wires.push_back(ctx.getWireBelPin(b, PIN_D_OUT_0));
-                    dst_wires.push_back(ctx.getWireBelPin(b, PIN_OUTPUT_ENABLE));
+                if (ctx->getBelType(b) == TYPE_SB_IO) {
+                    dst_wires.push_back(ctx->getWireBelPin(b, PIN_D_OUT_0));
+                    dst_wires.push_back(ctx->getWireBelPin(b, PIN_OUTPUT_ENABLE));
                 }
             }
 
-            ctx.shuffle(src_wires);
-            ctx.shuffle(dst_wires);
+            ctx->shuffle(src_wires);
+            ctx->shuffle(dst_wires);
 
             for (int i = 0; i < int(src_wires.size()) && i < int(dst_wires.size()); i++) {
                 delay_t actual_delay;
                 WireId src = src_wires[i], dst = dst_wires[i];
-                if (!get_actual_route_delay(&ctx, src, dst, actual_delay))
+                if (!ctx->getActualRouteDelay(src, dst, actual_delay))
                     continue;
-                printf("%s %s %.3f %.3f %d %d %d %d %d %d\n", ctx.getWireName(src).c_str(&ctx),
-                       ctx.getWireName(dst).c_str(&ctx), ctx.getDelayNS(actual_delay),
-                       ctx.getDelayNS(ctx.estimateDelay(src, dst)), ctx.chip_info->wire_data[src.index].x,
-                       ctx.chip_info->wire_data[src.index].y, ctx.chip_info->wire_data[src.index].type,
-                       ctx.chip_info->wire_data[dst.index].x, ctx.chip_info->wire_data[dst.index].y,
-                       ctx.chip_info->wire_data[dst.index].type);
+                printf("%s %s %.3f %.3f %d %d %d %d %d %d\n", ctx->getWireName(src).c_str(ctx.get()),
+                       ctx->getWireName(dst).c_str(ctx.get()), ctx->getDelayNS(actual_delay),
+                       ctx->getDelayNS(ctx->estimateDelay(src, dst)), ctx->chip_info->wire_data[src.index].x,
+                       ctx->chip_info->wire_data[src.index].y, ctx->chip_info->wire_data[src.index].type,
+                       ctx->chip_info->wire_data[dst.index].x, ctx->chip_info->wire_data[dst.index].y,
+                       ctx->chip_info->wire_data[dst.index].type);
             }
         }
+        if (vm.count("freq"))
+            ctx->target_freq = vm["freq"].as<double>() * 1e6;
+        ctx->timing_driven = true;
+        if (vm.count("no-tmdriv"))
+            ctx->timing_driven = false;
 
+#ifndef NO_GUI
+        if (vm.count("gui")) {
+            Application a(argc, argv);
+            MainWindow w(std::move(ctx), chipArgs);
+            if (vm.count("json")) {
+                std::string filename = vm["json"].as<std::string>();
+                std::string pcf = "";
+                if (vm.count("pcf"))
+                    pcf = vm["pcf"].as<std::string>();
+                w.load_json(filename, pcf);
+            }
+            w.show();
+
+            return a.exec();
+        }
+#endif
         if (vm.count("json")) {
             std::string filename = vm["json"].as<std::string>();
             std::ifstream f(filename);
-            if (!parse_json_file(f, filename, &ctx))
+            if (!parse_json_file(f, filename, ctx.get()))
                 log_error("Loading design failed.\n");
 
             if (vm.count("pcf")) {
                 std::ifstream pcf(vm["pcf"].as<std::string>());
-                if (!apply_pcf(&ctx, pcf))
+                if (!apply_pcf(ctx.get(), pcf))
                     log_error("Loading PCF failed.\n");
             }
 
-            if (!pack_design(&ctx) && !ctx.force)
+            if (!ctx->pack() && !ctx->force)
                 log_error("Packing design failed.\n");
-            if (vm.count("freq"))
-                ctx.target_freq = vm["freq"].as<double>() * 1e6;
-            assign_budget(&ctx);
-            ctx.check();
-            print_utilisation(&ctx);
-            ctx.timing_driven = true;
-            if (vm.count("no-tmdriv"))
-                ctx.timing_driven = false;
+            assign_budget(ctx.get());
+            ctx->check();
+            print_utilisation(ctx.get());
             if (!vm.count("pack-only")) {
-                if (!place_design_sa(&ctx) && !ctx.force)
+                if (!ctx->place() && !ctx->force)
                     log_error("Placing design failed.\n");
-                ctx.check();
-                if (!route_design(&ctx) && !ctx.force)
+                ctx->check();
+                if (!ctx->route() && !ctx->force)
                     log_error("Routing design failed.\n");
             }
         }
@@ -380,13 +398,13 @@ int main(int argc, char *argv[])
         if (vm.count("asc")) {
             std::string filename = vm["asc"].as<std::string>();
             std::ofstream f(filename);
-            write_asc(&ctx, f);
+            write_asc(ctx.get(), f);
         }
 
 #ifndef NO_PYTHON
         if (vm.count("run")) {
             init_python(argv[0], true);
-            python_export_global("ctx", ctx);
+            python_export_global("ctx", *ctx.get());
 
             std::vector<std::string> files = vm["run"].as<std::vector<std::string>>();
             for (auto filename : files)
@@ -395,16 +413,6 @@ int main(int argc, char *argv[])
             deinit_python();
         }
 #endif
-
-#ifndef NO_GUI
-        if (vm.count("gui")) {
-            Application a(argc, argv);
-            MainWindow w;
-            w.show();
-
-            rc = a.exec();
-        }
-#endif
         return rc;
     } catch (log_execution_error_exception) {
 #if defined(_MSC_VER)
diff --git a/ice40/pack.cc b/ice40/pack.cc
index d1be4a29..76a52be0 100644
--- a/ice40/pack.cc
+++ b/ice40/pack.cc
@@ -18,7 +18,6 @@
  *
  */
 
-#include "pack.h"
 #include <algorithm>
 #include <iterator>
 #include <unordered_set>
@@ -577,8 +576,9 @@ static void pack_special(Context *ctx)
 }
 
 // Main pack function
-bool pack_design(Context *ctx)
+bool Arch::pack()
 {
+    Context *ctx = getCtx();
     try {
         log_break();
         pack_constants(ctx);
diff --git a/tests/dummy/main.cc b/tests/generic/main.cc
similarity index 100%
rename from tests/dummy/main.cc
rename to tests/generic/main.cc