diff --git a/bsp/qemu-vexpress-a9/qemu.bat b/bsp/qemu-vexpress-a9/qemu.bat
index 603fe4a0ffd2120e8af16ced8cf14456e8f41a15..4a4acb33247da50e01652d241c5f63474be06dc3 100644
--- a/bsp/qemu-vexpress-a9/qemu.bat
+++ b/bsp/qemu-vexpress-a9/qemu.bat
@@ -3,4 +3,4 @@ if exist sd.bin goto run
 qemu-img create -f raw sd.bin 64M
 
 :run
-qemu-system-arm -M vexpress-a9 -kernel rtthread.elf -serial vc -serial vc -sd sd.bin
+qemu-system-arm -M vexpress-a9 -kernel rtthread.elf -serial stdio -sd sd.bin
diff --git a/bsp/qemu-vexpress-a9/qemu.sh b/bsp/qemu-vexpress-a9/qemu.sh
index e9568fa2692ee3be48c0ca063c16d49432a8906e..d9b350388b1146e888927c8d1fa0a0c90e614998 100644
--- a/bsp/qemu-vexpress-a9/qemu.sh
+++ b/bsp/qemu-vexpress-a9/qemu.sh
@@ -1 +1,5 @@
-qemu-system-arm -M vexpress-a9 -kernel rtthread.elf -serial vc -serial vc
+if [ ! -f "sd.bin" ]; then
+dd if=/dev/zero of=sd.bin bs=64M count=1
+fi
+
+qemu-system-arm -M vexpress-a9 -kernel rtthread.elf -serial stdio -sd sd.bin