diff --git a/src/NDS.cpp b/src/NDS.cpp
index 04a1a267..9b096b82 100644
--- a/src/NDS.cpp
+++ b/src/NDS.cpp
@@ -29,6 +29,7 @@
 #include "SPI.h"
 #include "RTC.h"
 #include "Wifi.h"
+#include "Platform.h"
 
 
 namespace NDS
@@ -342,6 +343,13 @@ void Reset()
     Wifi::Reset();
 }
 
+void Stop()
+{
+    printf("Stopping: shutdown\n");
+    Platform::StopEmu();
+    SPU::Stop();
+}
+
 void LoadROM(const char* path, bool direct)
 {
     Reset();
diff --git a/src/NDS.h b/src/NDS.h
index a1eab993..0d772010 100644
--- a/src/NDS.h
+++ b/src/NDS.h
@@ -104,6 +104,7 @@ extern u8 MainRAM[0x400000];
 bool Init();
 void DeInit();
 void Reset();
+void Stop();
 
 void LoadROM(const char* path, bool direct);
 void LoadBIOS();
diff --git a/src/Platform.h b/src/Platform.h
index 4fefd333..5196d0f1 100644
--- a/src/Platform.h
+++ b/src/Platform.h
@@ -24,6 +24,8 @@
 namespace Platform
 {
 
+void StopEmu();
+
 void* Thread_Create(void (*func)());
 void Thread_Free(void* thread);
 void Thread_Wait(void* thread);
diff --git a/src/SPI.cpp b/src/SPI.cpp
index 21f9ccb7..534f6ca2 100644
--- a/src/SPI.cpp
+++ b/src/SPI.cpp
@@ -365,7 +365,7 @@ u8 Read()
 }
 
 void Write(u8 val, u32 hold)
-{printf("SPI powerman %02X %d\n", val, hold?1:0);
+{
     if (!hold)
     {
         Hold = 0;
@@ -395,11 +395,11 @@ void Write(u8 val, u32 hold)
             switch (regid)
             {
             case 0:
-                if (val & 0x40) printf("DS shutdown\n");
-                printf("power %02X\n", val);
+                if (val & 0x40) NDS::Stop(); // shutdown
+                //printf("power %02X\n", val);
                 break;
             case 4:
-                printf("brightness %02X\n", val);
+                //printf("brightness %02X\n", val);
                 break;
             }
         }
diff --git a/src/SPU.cpp b/src/SPU.cpp
index 5c4a347f..a3f61b4e 100644
--- a/src/SPU.cpp
+++ b/src/SPU.cpp
@@ -114,6 +114,11 @@ void Reset()
     NDS::ScheduleEvent(NDS::Event_SPU, true, 1024*16, Mix, 16);
 }
 
+void Stop()
+{
+    memset(OutputBuffer, 0, 2*OutputBufferSize*2);
+}
+
 
 void SetBias(u16 bias)
 {
diff --git a/src/SPU.h b/src/SPU.h
index e388be9b..0d59db78 100644
--- a/src/SPU.h
+++ b/src/SPU.h
@@ -25,6 +25,7 @@ namespace SPU
 bool Init();
 void DeInit();
 void Reset();
+void Stop();
 
 void SetBias(u16 bias);
 
diff --git a/src/libui_sdl/Platform.cpp b/src/libui_sdl/Platform.cpp
index 7313ae44..67f136c7 100644
--- a/src/libui_sdl/Platform.cpp
+++ b/src/libui_sdl/Platform.cpp
@@ -44,6 +44,9 @@
 #endif
 
 
+void Stop();
+
+
 namespace Platform
 {
 
@@ -52,7 +55,7 @@ typedef struct
 {
     SDL_Thread* ID;
     void (*Func)();
-    
+
 } ThreadData;
 
 int ThreadEntry(void* data)
@@ -70,6 +73,12 @@ u8 PacketBuffer[2048];
 #define NIFI_VER 1*/
 
 
+void StopEmu()
+{
+    Stop();
+}
+
+
 void* Thread_Create(void (*func)())
 {
     ThreadData* data = new ThreadData;
diff --git a/src/libui_sdl/main.cpp b/src/libui_sdl/main.cpp
index 396bc29e..1068f922 100644
--- a/src/libui_sdl/main.cpp
+++ b/src/libui_sdl/main.cpp
@@ -272,6 +272,9 @@ void Stop()
     uiMenuItemDisable(MenuItem_Pause);
     uiMenuItemDisable(MenuItem_Reset);
     uiMenuItemSetChecked(MenuItem_Pause, 0);
+
+    memset(ScreenBuffer, 256*384*4, 0);
+    uiAreaQueueRedrawAll(MainDrawArea);
 }