add logic and CLI for game-specific workarounds

desmume/src/NDSSystem.cpp

@@ -1485,16 +1485,25 @@ static void execHardware_hstart()
 		gfx3d_VBlankEndSignal(frameSkipper.ShouldSkip3D());
 	}
 
+	if(nds.VCount==261)
+		nds.overclock = 0;
+
 	if(nds.VCount==263)
 	{
-		//when the vcount hits 263 it rolls over to 0
 			nds.VCount=0;
 	}
 	else if(nds.VCount==262)
+	{
+		if(!(NDS_ARM9.waitIRQ) && nds.overclock < 200 && CommonSettings.pokehax) {
+			nds.overclock++;
+			nds.VCount = 261;
+		}
+		else
 		{
 			//when the vcount hits 262, vblank ends (oam pre-renders by one scanline)
 			execHardware_hstart_vblankEnd();
 		}
+	}
 	else if(nds.VCount==192)
 	{
 		//turn on vblank status bit
@@ -2515,6 +2524,7 @@ void NDS_Reset()
 	nds.isTouch = 0;
 	nds.isFakeBooted = false;
 	nds.paddle = 0;
+	nds.overclock = 0;
 	nds.ConsoleType = CommonSettings.ConsoleType;
 	nds._DebugConsole = CommonSettings.DebugConsole;
 	nds.ensataEmulation = CommonSettings.EnsataEmulation;

desmume/src/NDSSystem.h

@@ -176,6 +176,7 @@ struct NDSSystem
 	u64 timerCycle[2][4];
 	u32 VCount;
 	u32 old;
+	u8 overclock;
 
 	//raw adc touch coords for old NDS
 	u16 adc_touchX;
@@ -577,6 +578,7 @@ extern struct TCommonSettings {
 	int num_cores;
 	bool single_core() { return num_cores==1; }
 	bool rigorous_timing;
+	bool pokehax;
 
 	int StylusPressure;
 	bool StylusJitter;

desmume/src/commandline.cpp

@@ -124,6 +124,7 @@ ENDL
 #endif
 " --advanced-timing          Use advanced bus-level timing; default ON" ENDL
 " --rigorous-timing          Use more realistic component timings; default OFF" ENDL
+" --pokehax                  Use game-specific hacks; default OFF" ENDL
 " --spu-advanced             Enable advanced SPU capture functions (reverb)" ENDL
 " --backupmem-db             Use DB for autodetecting backup memory type" ENDL
 ENDL
@@ -244,6 +245,7 @@ bool CommandLine::parse(int argc,char **argv)
 			#endif
 			{ "rigorous-timing", no_argument, &_rigorous_timing, 1},
 			{ "advanced-timing", no_argument, &_advanced_timing, 1},
+			{ "pokehax", no_argument, &_pokehax, 1},
 			{ "spu-advanced", no_argument, &_spu_advanced, 1},
 			{ "backupmem-db", no_argument, &autodetect_method, 1},
 
@@ -352,6 +354,7 @@ bool CommandLine::parse(int argc,char **argv)
 	if(_num_cores != -1) CommonSettings.num_cores = _num_cores;
 	if(_rigorous_timing) CommonSettings.rigorous_timing = true;
 	if(_advanced_timing != -1) CommonSettings.advanced_timing = _advanced_timing==1;
+	if(_advanced_timing != -1) CommonSettings.pokehax = _pokehax==1;
 
 #ifdef HAVE_JIT
 	if(_cpu_mode != -1) CommonSettings.use_jit = (_cpu_mode==1);

desmume/src/commandline.h

@@ -97,6 +97,7 @@ private:
 	int _num_cores;
 	int _rigorous_timing;
 	int _advanced_timing;
+	int _pokehax;
 	int _texture_deposterize;
 	int _texture_smooth;
 #ifdef HAVE_JIT

desmume/src/saves.cpp

@@ -206,6 +206,7 @@ SFORMAT SF_NDS[]={
 	{ "_FBS", 4, 1, &nds.freezeBus},
 	{ "_CEJ", 4, 1, &nds.cardEjected},
 	{ "_PDL", 2, 1, &nds.paddle},
+	{ "_OVR", 1, 1, &nds.overclock},
 	{ "_P00", 1, 1, &nds.power1.lcd},
 	{ "_P01", 1, 1, &nds.power1.gpuMain},
 	{ "_P02", 1, 1, &nds.power1.gfx3d_render},