reduce frameskip to 1 for turbo. makes for a slower turbo but at least there's no more crashing.

source/ngc/fceugx.cpp

@@ -46,8 +46,10 @@
 
 void FCEUD_Update(uint8 *XBuf, int32 *Buffer, int Count);
 
-static uint8 *xbsave=NULL;
 static int fskipc = 0;
+static uint8 *gfx=0;
+static int32 *sound=0;
+static int32 ssize=0;
 int ScreenshotRequested = 0;
 int ConfigRequested = 0;
 int ShutdownRequested = 0;
@@ -314,21 +316,12 @@ int main(int argc, char *argv[])
 
 		while(1) // emulation loop
 		{
-			uint8 *gfx;
-			int32 *sound;
-			int32 ssize;
-
 			#ifdef FRAMESKIP
 			fskipc=(fskipc+1)%(frameskip+1);
 			#endif
 
 			FCEUI_Emulate(&gfx, &sound, &ssize, fskipc);
-
-			if(!fskipc)
-			{
-				xbsave = gfx;
 			FCEUD_Update(gfx, sound, ssize);
-			}
 
 			if(ResetRequested)
 			{

source/ngc/fceusupport.cpp

@@ -68,7 +68,9 @@ ArchiveScanRecord FCEUD_ScanArchive(std::string fname) { return ArchiveScanRecor
 // main interface to FCE Ultra
 void FCEUD_Update(uint8 *XBuf, int32 *Buffer, int32 Count)
 {
+	if(Buffer && Count > 0)
 		PlaySound(Buffer, Count); // play sound
+	if(XBuf)
 		RenderFrame(XBuf); // output video frame
 	GetJoy(); // check controller input
 }

source/ngc/gcvideo.cpp

@@ -670,9 +670,6 @@ ResetVideo_Emu ()
 
 void RenderFrame(unsigned char *XBuf)
 {
-	if(!XBuf)
-		return;
-
 	// Ensure previous vb has complete
 	while ((LWP_ThreadIsSuspended (vbthread) == 0) || (copynow == GX_TRUE))
 		usleep (50);

source/ngc/pad.cpp

@@ -640,7 +640,7 @@ void GetJoy()
 	// Turbo mode
 	// RIGHT on c-stick and on classic ctrlr right joystick
 	if(userInput[0].pad.substickX > 70 || userInput[0].WPAD_Stick(1,0) > 70)
-		frameskip = 3;
+		frameskip = 1;
 	else
 		frameskip = 0;