diff --git a/sdk/bsp/crt0.S b/sdk/bsp/crt0.S
index b009a46..56bd79b 100644
--- a/sdk/bsp/crt0.S
+++ b/sdk/bsp/crt0.S
@@ -10,8 +10,8 @@ _start:
 .option pop
 	la sp, _sp
 #ifdef SIMULATION
-    li x26, 0x00
-    li x27, 0x00
+    /* clear sim result flags */
+    csrrwi x0, sstatus, 0x0
 #endif
 
 	/* Load data section */
@@ -45,9 +45,5 @@ _start:
     li a1, 0
     call main
 
-#ifdef SIMULATION
-    li x26, 0x01
-#endif
-
 loop:
     j loop