diff --git a/gui/ecp5/mainwindow.cc b/gui/ecp5/mainwindow.cc
index 0a33ee2b..2c561230 100644
--- a/gui/ecp5/mainwindow.cc
+++ b/gui/ecp5/mainwindow.cc
@@ -18,6 +18,10 @@
  */
 
 #include "mainwindow.h"
+#include "bitstream.h"
+#include "log.h"
+
+#include <QFileDialog>
 
 static void initMainResource() { Q_INIT_RESOURCE(nextpnr); }
 
@@ -44,7 +48,29 @@ void MainWindow::newContext(Context *ctx)
     setWindowTitle(title.c_str());
 }
 
-void MainWindow::createMenu() {}
+void MainWindow::createMenu() {
+    // Add arch specific actions
+    actionLoadBase = new QAction("Open Base Config", this);
+    actionLoadBase->setIcon(QIcon(":/icons/resources/open_base.png"));
+    actionLoadBase->setStatusTip("Open Base Config file");
+    actionLoadBase->setEnabled(false);
+    connect(actionLoadBase, &QAction::triggered, this, &MainWindow::open_base);
+
+    actionSaveConfig = new QAction("Save Bitstream", this);
+    actionSaveConfig->setIcon(QIcon(":/icons/resources/save_config.png"));
+    actionSaveConfig->setStatusTip("Save Bitstream config file");
+    actionSaveConfig->setEnabled(false);
+    connect(actionSaveConfig, &QAction::triggered, this, &MainWindow::save_config);
+
+    // Add actions in menus
+    mainActionBar->addSeparator();
+    mainActionBar->addAction(actionLoadBase);
+    mainActionBar->addAction(actionSaveConfig);
+
+    menuDesign->addSeparator();
+    menuDesign->addAction(actionLoadBase);
+    menuDesign->addAction(actionSaveConfig);    
+}
 
 void MainWindow::new_proj() {}
 
@@ -52,4 +78,38 @@ void MainWindow::open_proj() {}
 
 bool MainWindow::save_proj() { return false; }
 
+void MainWindow::load_base_config(std::string filename)
+{
+    disableActions();
+    currentBaseConfig = filename;
+    actionSaveConfig->setEnabled(true);
+}
+
+void MainWindow::open_base()
+{
+    QString fileName = QFileDialog::getOpenFileName(this, QString("Open Base Config"), QString(), QString("*.config"));
+    if (!fileName.isEmpty()) {
+        load_base_config(fileName.toStdString());
+    }
+}
+
+void MainWindow::save_config()
+{
+    QString fileName = QFileDialog::getSaveFileName(this, QString("Save Bitstream"), QString(), QString("*.config"));
+    if (!fileName.isEmpty()) {
+        std::string fn = fileName.toStdString();
+        disableActions();
+        write_bitstream(ctx.get(), currentBaseConfig, fileName.toStdString());
+        log("Saving Bitstream successful.\n");
+    }
+}
+
+void MainWindow::onDisableActions()
+{
+    actionLoadBase->setEnabled(false);
+    actionSaveConfig->setEnabled(false);
+}
+
+void MainWindow::onRouteFinished() { actionLoadBase->setEnabled(true); }
+
 NEXTPNR_NAMESPACE_END
diff --git a/gui/ecp5/mainwindow.h b/gui/ecp5/mainwindow.h
index 8421b52a..788eafc9 100644
--- a/gui/ecp5/mainwindow.h
+++ b/gui/ecp5/mainwindow.h
@@ -34,15 +34,26 @@ class MainWindow : public BaseMainWindow
 
   public:
     void createMenu();
+    void load_base_config(std::string filename);
+
+  protected:
+    void onDisableActions() override;
+    void onRouteFinished() override;
 
   protected Q_SLOTS:
     virtual void new_proj();
     virtual void open_proj();
     virtual bool save_proj();
     void newContext(Context *ctx);
+    void open_base();
+    void save_config();
+  private:
+    QAction *actionLoadBase;
+    QAction *actionSaveConfig;
 
-private:
     ArchArgs chipArgs;
+
+    std::string currentBaseConfig;
 };
 
 NEXTPNR_NAMESPACE_END
diff --git a/gui/ecp5/nextpnr.qrc b/gui/ecp5/nextpnr.qrc
index 03585ec0..09f96d74 100644
--- a/gui/ecp5/nextpnr.qrc
+++ b/gui/ecp5/nextpnr.qrc
@@ -1,2 +1,6 @@
 <RCC>
+    <qresource prefix="/icons">
+        <file>resources/open_base.png</file>
+        <file>resources/save_config.png</file>
+    </qresource>
 </RCC>
diff --git a/gui/ecp5/resources/open_base.png b/gui/ecp5/resources/open_base.png
new file mode 100644
index 00000000..d58d226c
Binary files /dev/null and b/gui/ecp5/resources/open_base.png differ
diff --git a/gui/ecp5/resources/save_config.png b/gui/ecp5/resources/save_config.png
new file mode 100644
index 00000000..2ade7128
Binary files /dev/null and b/gui/ecp5/resources/save_config.png differ