Merge branch 'master' into 8bitsound

Conflicts:
	source/nds/entry.cpp

9 files changed, 893 insertions, 575 deletions

diff --git a/source/nds/dma_adj.c b/source/nds/dma_adj.c
new file mode 100644
index 0000000..8b6f9ad
--- /dev/null
+++ b/source/nds/dma_adj.c
@@ -0,0 +1,26 @@
+#include "ds2_malloc.h"
+#include "dma_adj.h"
+
+#ifdef DS2_DMA
+
+struct SPointerAdjustments PtrAdj;
+
+void* AlignedMalloc (unsigned int Size, unsigned int Alignment, unsigned int* Adjustment)
+{
+	if (Alignment == 0) Alignment = 1;
+
+	unsigned char* result = (unsigned char*) malloc(Size + Alignment);
+	if (!result) {
+		return result;
+	} else {
+		*Adjustment = Alignment - ((unsigned int) result & (Alignment - 1));
+		return (void*) (result + *Adjustment);
+	}
+}
+
+void AlignedFree (void* Memory, unsigned int Adjustment)
+{
+	free((void*) ((unsigned char*) Memory - Adjustment));
+}
+
+#endif // DS2_DMA
diff --git a/source/nds/dma_adj.h b/source/nds/dma_adj.h
new file mode 100644
index 0000000..3852f09
--- /dev/null
+++ b/source/nds/dma_adj.h
@@ -0,0 +1,29 @@
+#ifndef _DMA_ADJ_H_
+#define _DMA_ADJ_H_
+
+#ifdef DS2_DMA
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct SPointerAdjustments {
+	/* These are used by the DSTWO-NDS side code. */
+	unsigned int  GFXScreen;
+
+	/* These are used by Snes9x. */
+	unsigned int  ROM;
+};
+
+extern struct SPointerAdjustments PtrAdj;
+
+extern void* AlignedMalloc (unsigned int Size, unsigned int Alignment, unsigned int* Adjustment);
+extern void AlignedFree (void* Memory, unsigned int Adjustment);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // DS2_DMA
+
+#endif // !_DMA_ADJ_H_
diff --git a/source/nds/ds2_main.c b/source/nds/ds2_main.c
index f9b29d5..af81df3 100644
--- a/source/nds/ds2_main.c
+++ b/source/nds/ds2_main.c
@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "port.h"
+
 #include <stdio.h>
 #include "console.h"
 #include "fs_api.h"
@@ -25,6 +27,7 @@
 #include "ds2_timer.h"
 #include "ds2_malloc.h"
 #include "ds2sound.h"
+#include "gui.h"
 
 #define BLACK_COLOR		RGB15(0, 0, 0)
 #define WHITE_COLOR		RGB15(31, 31, 31)
@@ -47,7 +50,7 @@ void ddump_mem(unsigned char* addr, unsigned int len)
 void ds2_main(void)
 {
 	int err;
-	ds2_setCPUclocklevel(13);
+	HighFrequencyCPU();
 	//Initial video and audio and other input and output
 	err = ds2io_initb(DS2_BUFFER_SIZE, SND_SAMPLE_RATE, 0, 0);
 	if(err) goto _failure;
diff --git a/source/nds/ds2sound.h b/source/nds/ds2sound.h
index f51a6e1..8c0e2bf 100644
--- a/source/nds/ds2sound.h
+++ b/source/nds/ds2sound.h
@@ -1,21 +1,24 @@
 // The sound buffer sizes used on the DS2's side, for each value of
 // Settings.SoundPlaybackRate.
+// * Don't buffer too much, otherwise audio is delayed from video.
+// * Don't go below one frame (20 milliseconds).
+// * Buffer sizes must be multiples of 128.
 #define DS2_BUFFER_SIZE_4  512 /* tested working */
-#define DS2_BUFFER_SIZE_5 1024 /* like the SNES! tested working, but slow */
-#define DS2_BUFFER_SIZE_6 1024 /* tested working, slow because of upsampling */
-#define DS2_BUFFER_SIZE_7 1024 /* tested working, slow because of upsampling */
+#define DS2_BUFFER_SIZE_5  640 /* like the SNES! tested working */
+#define DS2_BUFFER_SIZE_6  896 /* tested working */
+#define DS2_BUFFER_SIZE_7 1024 /* tested working */
 
 // The sampling rate for the sound, in Hz, for each value of
 // Settings.SoundPlaybackRate.
 #define SND_SAMPLE_RATE_1 8000
 #define SND_SAMPLE_RATE_2 11025
 #define SND_SAMPLE_RATE_3 16000
-#define SND_SAMPLE_RATE_4 22050
-#define SND_SAMPLE_RATE_5 32000
+#define SND_SAMPLE_RATE_4 22050 /* NDSSFC 1.06 - CATSFC 1.28 used this one */
+#define SND_SAMPLE_RATE_5 32000 /* like the SNES! */
 #define SND_SAMPLE_RATE_6 44100
-#define SND_SAMPLE_RATE_7 48000
+#define SND_SAMPLE_RATE_7 48000 /* CATSFC 1.25 made using this one possible */
 
 // Settings in use. The number should match in all three settings.
-#define DS2_BUFFER_SIZE   DS2_BUFFER_SIZE_4
-#define SND_SAMPLE_RATE   SND_SAMPLE_RATE_4
-#define SNES9X_SRATE_ID   4
+#define DS2_BUFFER_SIZE   DS2_BUFFER_SIZE_5
+#define SND_SAMPLE_RATE   SND_SAMPLE_RATE_5
+#define SNES9X_SRATE_ID   5
diff --git a/source/nds/entry.cpp b/source/nds/entry.cpp
index 702442e..c4cc389 100644
--- a/source/nds/entry.cpp
+++ b/source/nds/entry.cpp
@@ -23,6 +23,11 @@
 #include "entry.h"
 #include "ds2sound.h"
 
+#ifdef DS2_DMA
+#include "ds2_dma.h"
+#include "dma_adj.h"
+#endif
+
 void S9xProcessSound (unsigned int);
 
 char *rom_filename = NULL;
@@ -58,7 +63,11 @@ void S9xExtraUsage ()
 */
 void S9xDeinitDisplay (void)
 {
+#ifdef DS2_DMA
+    if(GFX.Screen) AlignedFree(GFX.Screen, PtrAdj.GFXScreen);
+#else
     if(GFX.Screen) free(GFX.Screen);
+#endif
     if(GFX.SubScreen) free(GFX.SubScreen);
     if(GFX.ZBuffer) free(GFX.ZBuffer);
     if(GFX.SubZBuffer) free(GFX.SubZBuffer);
@@ -69,7 +78,11 @@ void S9xInitDisplay (int, char **)
     int h = IMAGE_HEIGHT;
 
 	GFX.Pitch = IMAGE_WIDTH * 2;
+#ifdef DS2_DMA
+	GFX.Screen =    (unsigned char*) AlignedMalloc (GFX.Pitch * h, 32, &PtrAdj.GFXScreen);
+#else
 	GFX.Screen =	(unsigned char*) malloc (GFX.Pitch * h);
+#endif
 	GFX.SubScreen = (unsigned char*) malloc (GFX.Pitch * h);
 	GFX.ZBuffer = 	(unsigned char*) malloc ((GFX.Pitch >> 1) * h);
 	GFX.SubZBuffer =(unsigned char*) malloc ((GFX.Pitch >> 1) * h);
@@ -86,7 +99,7 @@ void S9xParseDisplayArg (char **argv, int &ind, int)
 
 void S9xExit ()
 {
-  ds2_setCPUclocklevel(13); // Crank it up to exit quickly
+  HighFrequencyCPU(); // Crank it up to exit quickly
   if(Settings.SPC7110)
     (*CleanUp7110)();
 
@@ -130,17 +143,38 @@ bool8 S9xDeinitUpdate (int Width, int Height, bool8 /*sixteen_bit*/)
 	{
 		//Up
 		case 1:
+#ifdef DS2_DMA
+			__dcache_writeback_all();
+			ds2_DMAcopy_32Byte(1 /* channel: graphics */, up_screen_addr, GFX.Screen + 256 * 32 * 2, 256 * 192 * 2);
+			ds2_DMA_wait(1);
+			ds2_DMA_stop(1);
+#else
 		    memcpy(up_screen_addr, GFX.Screen+256*32*2, 256*192*2);
+#endif
 			break;
 
 		//Down
 		case 2:
+#ifdef DS2_DMA
+			__dcache_writeback_all();
+			ds2_DMAcopy_32Byte(1 /* channel: graphics */, up_screen_addr, GFX.Screen, 256 * 192 * 2);
+			ds2_DMA_wait(1);
+			ds2_DMA_stop(1);
+#else
 		    memcpy(up_screen_addr, GFX.Screen, 256*192*2);
+#endif
 			break;
 
 		//Both
 		case 3:
+#ifdef DS2_DMA
+			__dcache_writeback_all();
+			ds2_DMAcopy_32Byte(1 /* channel: graphics */, up_screen_addr, GFX.Screen + 256 * 16 * 2, 256 * 192 * 2);
+			ds2_DMA_wait(1);
+			ds2_DMA_stop(1);
+#else
 		    memcpy(up_screen_addr, GFX.Screen+256*16*2, 256*192*2);
+#endif
 			break;
 			
 		case 4:
@@ -150,14 +184,23 @@ bool8 S9xDeinitUpdate (int Width, int Height, bool8 /*sixteen_bit*/)
 
 		default:
 		{
-			unsigned char *src, *dst;
-			unsigned int m;
+#ifdef DS2_DMA
+			__dcache_writeback_all();
+#endif
+			register unsigned char *src, *dst;
+			register unsigned int m;
 
 			src = GFX.Screen;
 			dst = (unsigned char*)up_screen_addr;
 			for(m = 0; m < 32; m++)
 			{
+#ifdef DS2_DMA
+				ds2_DMAcopy_32Byte(1 /* channel: graphics */, dst, src, 256 * 6 * 2);
+				ds2_DMA_wait(1);
+				ds2_DMA_stop(1);
+#else
 				memcpy(dst, src, 256*6*2);
+#endif
 				dst += 256*6*2;
 				src += 256*7*2;
 			}
@@ -350,6 +393,18 @@ void game_set_frameskip()
 		Settings.SkipFrames = game_config.frameskip_value - 1 /* 1 -> 0 and so on */;
 	}
 }
+
+void game_set_fluidity()
+{
+	if( game_config.SoundSync == 1)
+	{
+		Settings.SoundSync = TRUE;
+	}
+	else
+	{
+		Settings.SoundSync = FALSE;
+	}
+}
 	
 void init_sfc_setting(void)
 {
@@ -370,6 +425,7 @@ void init_sfc_setting(void)
 	//sound settings
     Settings.APUEnabled = Settings.NextAPUEnabled = TRUE;
 	Settings.FixFrequency = 1;
+
 	S9xSetEightBitConsoleSound (TRUE);
 
 
@@ -403,7 +459,7 @@ void init_sfc_setting(void)
 #endif
     Settings.ApplyCheats = TRUE;
     Settings.TurboMode = FALSE;
-    Settings.TurboSkipFrames = 40;
+    Settings.TurboSkipFrames = 10;
     Settings.StretchScreenshots = 1;
 
 	Settings.HBlankStart = (256 * Settings.H_Max) / SNES_HCOUNTER_MAX;
@@ -444,7 +500,7 @@ void game_restart(void)
 	S9xReset ();
 }
 
-int load_gamepak(char* file)
+int load_gamepak(const char* file)
 {
 	CPU.Flags = 0;
 	// mdelay(50); // Delete this delay
@@ -540,6 +596,7 @@ int sfc_main (int argc, char **argv)
 #endif
 
 	Settings.Paused = 1;
+	bool8 FirstInvocation = TRUE;
 
     while (1)
     {
@@ -564,7 +621,8 @@ int sfc_main (int argc, char **argv)
 			unsigned short screen[256*192];
 
 			copy_screen((void*)screen, up_screen_addr, 0, 0, 256, 192);
-			menu(screen);
+			menu(screen, FirstInvocation);
+			FirstInvocation = FALSE;
 			game_disableAudio();
 			Settings.Paused = 0;
 		}
@@ -582,7 +640,6 @@ int sfc_main (int argc, char **argv)
 
 static unsigned int sync_last= 0;
 static unsigned int sync_next = 0;
-static unsigned int auto_equivalent_skip = 0;
 
 static unsigned int skip_rate= 0;
 
@@ -590,6 +647,7 @@ void S9xSyncSpeed ()
 {
 	uint32 syncnow;
 	int32 syncdif;
+	unsigned int LastAutoCPUFrequency = AutoCPUFrequency;
 
 #if 0
     if (Settings.SoundSync == 2)
@@ -601,12 +659,14 @@ void S9xSyncSpeed ()
 #endif
 	syncnow = getSysTime();
 
-	if (game_fast_forward || temporary_fast_forward /* hotkey is held */)
+	bool8 FastForward = game_fast_forward || temporary_fast_forward /* hotkey is held */;
+
+	if (FastForward)
 	{
 		sync_last = syncnow;
 		sync_next = syncnow;
 
-		if(++skip_rate < 10)
+		if(++skip_rate < Settings.TurboSkipFrames)
 			IPPU.RenderThisFrame = false;
 		else
 		{
@@ -614,110 +674,132 @@ void S9xSyncSpeed ()
 			IPPU.RenderThisFrame = true;
 		}
 	}
-	else if (Settings.SkipFrames == AUTO_FRAMERATE /* && !game_fast_forward && !temporary_fast_forward */)
+	else
 	{
-		// frame_time is in getSysTime units: 42.667 microseconds.
-		int32 frame_time = Settings.PAL ? 468 /* = 20.0 ms */ : 391 /* = 16.67 ms */;
-		if (sync_last > syncnow) // Overflow occurred! (every 50 hrs)
+		// Manual or automatic frame skipping, no fast-forward.
+		if (Settings.SkipFrames == AUTO_FRAMERATE)
 		{
-			// Render this frame regardless, set the
-			// sync_next, and get the hell out.
-			IPPU.RenderThisFrame = TRUE;
+			// frame_time is in getSysTime units: 42.667 microseconds.
+			int32 frame_time = Settings.PAL ? 468 /* = 20.0 ms */ : 391 /* = 16.67 ms */;
+			if (sync_last > syncnow) // Overflow occurred! (every 50 hrs)
+			{
+				// Render this frame regardless, set the
+				// sync_next, and get the hell out.
+				IPPU.RenderThisFrame = TRUE;
+				sync_last = syncnow;
+				sync_next = syncnow + frame_time;
+				return;
+			}
 			sync_last = syncnow;
-			sync_next = syncnow + frame_time;
-			return;
-		}
-		sync_last = syncnow;
-		// If this is positive, we have syncdif*42.66 microseconds to
-		// spare.
-		// If this is negative, we're late by syncdif*42.66
-		// microseconds.
-		syncdif = sync_next - syncnow;
-		if (syncdif < 0 && syncdif >= -(frame_time / 2))
-		{
-			// We're late, but by less than half a frame. Draw it
-			// anyway. If the next frame is too late, it'll be
-			// skipped.
-			skip_rate = 0;
-			IPPU.RenderThisFrame = true;
-			sync_next += frame_time;
-		}
-		else if(syncdif < 0)
-		{
-			/*
-			 * If we're consistently late, delay up to 8 frames.
-			 * 
-			 * That really helps with certain games, such as
-			 * Super Mario RPG and Yoshi's Island.
-			 */
-			if(++skip_rate < 10)
+			// If this is positive, we have syncdif*42.66 microseconds to
+			// spare.
+			// If this is negative, we're late by syncdif*42.66
+			// microseconds.
+			syncdif = sync_next - syncnow;
+			if(skip_rate < 2 /* did not skip 2 frames yet */)
 			{
-				if(syncdif >= -11719 /* not more than 500.0 ms late */)
+				// Skip a minimum of 2 frames between rendered frames.
+				// This prevents the DSTwo-DS link from being too busy
+				// to return button statuses.
+				++skip_rate;
+				IPPU.RenderThisFrame = FALSE;
+				sync_next += frame_time;
+			}
+			else if(syncdif < 0)
+			{
+				/*
+				 * If we're consistently late, delay up to 8 frames.
+				 * 
+				 * That really helps with certain games, such as
+				 * Super Mario RPG and Yoshi's Island.
+				 */
+				if(++skip_rate < 10)
 				{
-					IPPU.RenderThisFrame = FALSE;
-					sync_next += frame_time;
+					if(syncdif >= -11719 /* not more than 500.0 ms late */)
+					{
+						IPPU.RenderThisFrame = FALSE;
+						sync_next += frame_time;
+					}
+					else
+					{	//lag more than 0.5s, maybe paused
+						IPPU.RenderThisFrame = TRUE;
+						sync_next = syncnow + frame_time;
+					}
 				}
 				else
-				{	//lag more than 0.5s, maybe paused
+				{
+					skip_rate = 0;
 					IPPU.RenderThisFrame = TRUE;
 					sync_next = syncnow + frame_time;
 				}
 			}
-			else
+			else // Early
 			{
 				skip_rate = 0;
+				if (syncdif > 0)
+				{
+					do {
+						S9xProcessSound (0);
+#ifdef ACCUMULATE_JOYPAD
+/*
+ * This call allows NDSSFC to synchronise the DS controller more often.
+ * If porting a later version of Snes9x into NDSSFC, it is essential to
+ * preserve it.
+ */
+						NDSSFCAccumulateJoypad ();
+#endif
+						syncdif = sync_next - getSysTime();
+					} while (syncdif > 0);
+				}
+
 				IPPU.RenderThisFrame = TRUE;
-				sync_next = syncnow + frame_time;
+				sync_next += frame_time;
 			}
-		}
-		else // Early
-		{
-			skip_rate = 0;
-			ds2_setCPUclocklevel(0);
-			if (syncdif > 0)
-				udelay(syncdif * 128 / 3 /* times 42 + 2/3 microseconds */);
-			set_cpu_clock(clock_speed_number);
-			S9xProcessSound (0);
-
-			IPPU.RenderThisFrame = TRUE;
-			sync_next += frame_time;
-		}
 #if 0
-		if(++framenum >= 60)
+			if(++framenum >= 60)
+			{
+				syncdif = syncnow - sync_last;
+				sync_last = syncnow;
+				framenum = 0;
+				//printf("T %d %d\n", syncdif*42667/1000, realframe);
+				realframe = 0;
+			}
+#endif
+		}
+		else /* if (Settings.SkipFrames != AUTO_FRAMERATE) */
 		{
-			syncdif = syncnow - sync_last;
+			// frame_time is in getSysTime units: 42.667 microseconds.
+			uint32 frame_time = Settings.PAL ? 468 /* = 20.0 ms */ : 391 /* = 16.67 ms */;
 			sync_last = syncnow;
-			framenum = 0;
-			//printf("T %d %d\n", syncdif*42667/1000, realframe);
-			realframe = 0;
-		}
+			if (++skip_rate > Settings.SkipFrames)
+			{
+				skip_rate = 0;
+				IPPU.RenderThisFrame = TRUE;
+				// Are we early?
+				syncdif = sync_next - syncnow;
+				if (syncdif > 0)
+				{
+					do {
+						S9xProcessSound (0);
+#ifdef ACCUMULATE_JOYPAD
+/*
+ * This call allows NDSSFC to synchronise the DS controller more often.
+ * If porting a later version of Snes9x into NDSSFC, it is essential to
+ * preserve it.
+ */
+						NDSSFCAccumulateJoypad ();
 #endif
-	}
-	else /* if (Settings.SkipFrames != AUTO_FRAMERATE && !game_fast_forward && !temporary_fast_forward) */
-	{
-		// frame_time is in getSysTime units: 42.667 microseconds.
-		uint32 frame_time = Settings.PAL ? 468 /* = 20.0 ms */ : 391 /* = 16.67 ms */;
-		sync_last = syncnow;
-		if (++skip_rate > Settings.SkipFrames)
-		{
-			skip_rate = 0;
-			IPPU.RenderThisFrame = TRUE;
-			// Are we early?
-			syncdif = sync_next - syncnow;
-			if (syncdif > 0)
+						syncdif = sync_next - getSysTime();
+					} while (syncdif > 0);
+					// After that little delay, what time is it?
+					syncnow = getSysTime();
+				}
+				sync_next = syncnow + frame_time * (Settings.SkipFrames + 1);
+			}
+			else
 			{
-				ds2_setCPUclocklevel(0);
-				udelay(syncdif * 128 / 3 /* times 42 + 2/3 microseconds */);
-				set_cpu_clock(clock_speed_number);
-				S9xProcessSound (0);
-				// After that little delay, what time is it?
-				syncnow = getSysTime();
+				IPPU.RenderThisFrame = FALSE;
 			}
-			sync_next = syncnow + frame_time * (Settings.SkipFrames + 1);
-		}
-		else
-		{
-			IPPU.RenderThisFrame = FALSE;
 		}
 	}
 
@@ -901,150 +983,189 @@ void S9xGenerateSound ()
 	}
 }
 
-void S9xProcessSound (unsigned int)
-{
-	unsigned short *audiobuff;
+#define SOUND_EMISSION_INTERVAL ((unsigned int) ((((unsigned long long) DS2_BUFFER_SIZE * 1000000) / SND_SAMPLE_RATE) * 3 / 128))
+#define TRUE_SOUND_EMISSION_INTERVAL ((((double) DS2_BUFFER_SIZE * 1000000) / SND_SAMPLE_RATE) * 3 / 128)
+#define SOUND_EMISSION_INTERVAL_ERROR ((int) ((TRUE_SOUND_EMISSION_INTERVAL - SOUND_EMISSION_INTERVAL) * FIXED_POINT))
+static unsigned int LastSoundEmissionTime = 0;
 
-	if (so.mute_sound || !game_enable_audio)
-		return;
+/*
+ * Accumulated error in the sound emission time. The unit is as follows:
+ * FIXED_POINT = 42.667 microseconds.
+ * As the error goes past FIXED_POINT, the new target for sound emission
+ * becomes 42.667 microseconds LATER. This helps with sound buffer overruns,
+ * correctly dealing with the fact that 42.667 microseconds does not fit
+ * an integer number of times in 1/32000 second (or whatever sampling rate).
+ */
+static unsigned int SoundEmissionTimeError = 0;
 
-	if(ds2_checkAudiobuff() > 4)
+void S9xProcessSound (unsigned int)
+{
+	if (!game_enable_audio)
 		return;
 
-	/* Number of samples to generate now */
-	int sample_count;
-	sample_count = so.buffer_size;
-#ifndef FOREVER_16_BIT_SOUND
-	if (so.sixteen_bit)
+	unsigned int Now = getSysTime();
+	if (Now - LastSoundEmissionTime >= SOUND_EMISSION_INTERVAL)
 	{
-#endif
-		/* to prevent running out of buffer space,
-		* create less samples
-		*/
-		sample_count >>= 1;
-#ifndef FOREVER_16_BIT_SOUND
-	}
-#endif
+		if(ds2_checkAudiobuff() > AUDIO_BUFFER_COUNT - 1)
+		{
+			LastSoundEmissionTime++;
+			return;
+		}
 
-	audiobuff = (unsigned short*)ds2_getAudiobuff();
-	if(NULL == audiobuff)	//There are audio queue in sending or wait to send
-	{
-		return;
-	}
+		unsigned short *audiobuff;
 
-	/* If we need more audio samples */
-	if (so.samples_mixed_so_far < sample_count)
-	{
-		/* Where to put the samples to */
+		if (Now - LastSoundEmissionTime >= 11719 /* 500 milliseconds */)
+		{
+			LastSoundEmissionTime = Now;
+			// We were probably paused. Restart sending sound,
+			// synchronising from now.
+		}
+		else
+		{
+			LastSoundEmissionTime += SOUND_EMISSION_INTERVAL;
+			SoundEmissionTimeError += SOUND_EMISSION_INTERVAL_ERROR;
+			if (SoundEmissionTimeError >= FIXED_POINT)
+			{
+				LastSoundEmissionTime += SoundEmissionTimeError >> FIXED_POINT_SHIFT;
+				SoundEmissionTimeError &= FIXED_POINT_REMAINDER;
+			}
+		}
+		/* Number of samples to generate now */
+		int sample_count = so.buffer_size;
 #ifndef FOREVER_16_BIT_SOUND
-		unsigned byte_offset = (so.play_position + 
-		(so.sixteen_bit ? (so.samples_mixed_so_far << 1) : so.samples_mixed_so_far)) & SOUND_BUFFER_SIZE_MASK;
-#else
-		unsigned byte_offset = (so.play_position + 
-		(so.samples_mixed_so_far << 1)) & SOUND_BUFFER_SIZE_MASK;
+		if (so.sixteen_bit)
+		{
+#endif
+			/* to prevent running out of buffer space,
+			* create less samples
+			*/
+			sample_count >>= 1;
+#ifndef FOREVER_16_BIT_SOUND
+		}
 #endif
 
-		//printf ("%d:", sample_count - so.samples_mixed_so_far); fflush (stdout);
-		if (Settings.SoundSync == 2)
+		audiobuff = (unsigned short*)ds2_getAudiobuff();
+		while (audiobuff == NULL) //There are audio queue in sending or wait to send
 		{
-			/*memset (Buf + (byte_offset & SOUND_BUFFER_SIZE_MASK), 0,
-			sample_count - so.samples_mixed_so_far);*/
+#ifdef ACCUMULATE_JOYPAD
+			NDSSFCAccumulateJoypad ();
+#endif
+			audiobuff = (unsigned short*)ds2_getAudiobuff();
 		}
-		else
+
+		/* If we need more audio samples */
+		if (so.samples_mixed_so_far < sample_count)
 		{
-			/* Mix the missing samples */
+			/* Where to put the samples to */
 #ifndef FOREVER_16_BIT_SOUND
-			int bytes_so_far = so.sixteen_bit ? (so.samples_mixed_so_far << 1) :
-				so.samples_mixed_so_far;
+			unsigned byte_offset = (so.play_position + 
+			(so.sixteen_bit ? (so.samples_mixed_so_far << 1) : so.samples_mixed_so_far)) & SOUND_BUFFER_SIZE_MASK;
 #else
-			int bytes_so_far = so.samples_mixed_so_far << 1;
+			unsigned byte_offset = (so.play_position + 
+			(so.samples_mixed_so_far << 1)) & SOUND_BUFFER_SIZE_MASK;
 #endif
 
-			uint32 samples_to_write = sample_count - so.samples_mixed_so_far;
-			do
+			if (Settings.SoundSync == 2)
 			{
-				int bytes_this_run = samples_to_write;
+				/*memset (Buf + (byte_offset & SOUND_BUFFER_SIZE_MASK), 0,
+				sample_count - so.samples_mixed_so_far);*/
+			}
+			else
+			{
+				/* Mix the missing samples */
 #ifndef FOREVER_16_BIT_SOUND
-				if (so.sixteen_bit)
+				int bytes_so_far = so.sixteen_bit ? (so.samples_mixed_so_far << 1) :
+					so.samples_mixed_so_far;
+#else
+				int bytes_so_far = so.samples_mixed_so_far << 1;
 #endif
-					bytes_this_run <<= 1;
 
-				if (byte_offset + bytes_this_run > SOUND_BUFFER_SIZE)
+				uint32 samples_to_write = sample_count - so.samples_mixed_so_far;
+				do
 				{
-					bytes_this_run = SOUND_BUFFER_SIZE - byte_offset;
-				}
+					int bytes_this_run = samples_to_write;
+#ifndef FOREVER_16_BIT_SOUND
+					if (so.sixteen_bit)
+#endif
+						bytes_this_run <<= 1;
 
-				if (bytes_so_far + bytes_this_run > so.buffer_size)
-				{
-					bytes_this_run = so.buffer_size - bytes_so_far;
-					if (bytes_this_run == 0)
-						break;
-				}
+					if (byte_offset + bytes_this_run > SOUND_BUFFER_SIZE)
+					{
+						bytes_this_run = SOUND_BUFFER_SIZE - byte_offset;
+					}
 
-				int samples_this_run = bytes_this_run;
+					if (bytes_so_far + bytes_this_run > so.buffer_size)
+					{
+						bytes_this_run = so.buffer_size - bytes_so_far;
+						if (bytes_this_run == 0)
+							break;
+					}
+
+					int samples_this_run = bytes_this_run;
 #ifndef FOREVER_16_BIT_SOUND
-				if (so.sixteen_bit)
+					if (so.sixteen_bit)
 #endif
-					samples_this_run >>= 1;
+						samples_this_run >>= 1;
 
-				S9xMixSamples (Buf + byte_offset, samples_this_run);
-				so.samples_mixed_so_far += samples_this_run;
-				samples_to_write -= samples_this_run;
+					S9xMixSamples (Buf + byte_offset, samples_this_run);
+					so.samples_mixed_so_far += samples_this_run;
+					samples_to_write -= samples_this_run;
 #ifndef FOREVER_16_BIT_SOUND
-				bytes_so_far += so.sixteen_bit ? (samples_this_run << 1) :
-					samples_this_run;
+					bytes_so_far += so.sixteen_bit ? (samples_this_run << 1) :
+						samples_this_run;
 #else
-				bytes_so_far += samples_this_run << 1;
+					bytes_so_far += samples_this_run << 1;
 #endif
-				byte_offset = (byte_offset + bytes_this_run) & SOUND_BUFFER_SIZE_MASK;
-			} while (samples_to_write > 0);
+					byte_offset = (byte_offset + bytes_this_run) & SOUND_BUFFER_SIZE_MASK;
+				} while (samples_to_write > 0);
+			}
 		}
-	}
 
-//    if (!so.mute_sound)
-	{
-		unsigned bytes_to_write = sample_count;
+	//    if (!so.mute_sound)
+		{
+			unsigned bytes_to_write = sample_count;
 #ifndef FOREVER_16_BIT_SOUND
-		if(so.sixteen_bit)
+			if(so.sixteen_bit)
 #endif
-			bytes_to_write <<= 1;
+				bytes_to_write <<= 1;
 
-		unsigned byte_offset = so.play_position;
-		so.play_position = (so.play_position + bytes_to_write) & SOUND_BUFFER_SIZE_MASK; /* wrap to beginning */
+			unsigned byte_offset = so.play_position;
+			so.play_position = (so.play_position + bytes_to_write) & SOUND_BUFFER_SIZE_MASK; /* wrap to beginning */
 
-		unsigned short *dst_pt = audiobuff;
-		unsigned short *dst_pt1 = dst_pt + DS2_BUFFER_SIZE;
+			unsigned short *dst_pt = audiobuff;
+			unsigned short *dst_pt1 = dst_pt + DS2_BUFFER_SIZE;
 
-		/* Feed the samples to the soundcard until nothing is left */
-		for(;;)
-		{
-			int I = bytes_to_write;
-			if (byte_offset + I > SOUND_BUFFER_SIZE)
+			/* Feed the samples to the soundcard until nothing is left */
+			for(;;)
 			{
-				I = SOUND_BUFFER_SIZE - byte_offset;
-			}
-			if(I == 0) break;
+				int I = bytes_to_write;
+				if (byte_offset + I > SOUND_BUFFER_SIZE)
+				{
+					I = SOUND_BUFFER_SIZE - byte_offset;
+				}
+				if(I == 0) break;
 
-//			memcpy(dst_pt, (char *) Buf + byte_offset, I);
-//			dst_pt += I;
+	//			memcpy(dst_pt, (char *) Buf + byte_offset, I);
+	//			dst_pt += I;
 
-			unsigned short *src_pt= (unsigned short*)(Buf + byte_offset);
-			for(int m= 0; m < I/4; m++)
-			{
-				*dst_pt++= *src_pt++;//(*src_pt++) <<1;
-				*dst_pt1++= *src_pt++;//(*src_pt++) <<1;
+				unsigned short *src_pt= (unsigned short*)(Buf + byte_offset);
+				for(int m= 0; m < I/4; m++)
+				{
+					*dst_pt++= *src_pt++;//(*src_pt++) <<1;
+					*dst_pt1++= *src_pt++;//(*src_pt++) <<1;
+				}
+
+				bytes_to_write -= I;
+				byte_offset = (byte_offset + I) & SOUND_BUFFER_SIZE_MASK; /* wrap */
 			}
 
-			bytes_to_write -= I;
-			byte_offset = (byte_offset + I) & SOUND_BUFFER_SIZE_MASK; /* wrap */
-		}
+			ds2_updateAudio();
 
-		ds2_updateAudio();
+			/* All data sent. */
+		}
 
-		/* All data sent. */
+		so.samples_mixed_so_far -= sample_count;
 	}
-
-	so.samples_mixed_so_far -= sample_count;
 }
 
 /*
@@ -1066,68 +1187,99 @@ const unsigned int keymap[12] = {
 
 static bool8 SoundToggleWasHeld = FALSE;
 
-unsigned int S9xReadJoypad (int which1)
-{
-    struct key_buf inputdata;
+#ifdef ACCUMULATE_JOYPAD
+// These are kept as DS key bitfields until it's time to send them to Snes9x.
+static uint32 PreviousControls = 0x00000000;
+static uint32 ControlsPressed  = 0x00000000;
+static uint32 ControlsReleased = 0x00000000;
 
+void NDSSFCAccumulateJoypad ()
+{
+	struct key_buf inputdata;
 	ds2_getrawInput(&inputdata);
 
-	if (inputdata.key & KEY_LID)
+	ControlsPressed |= inputdata.key & ~PreviousControls;
+	ControlsReleased |= PreviousControls & ~inputdata.key;
+}
+#endif // ACCUMULATE_JOYPAD
+
+uint32 S9xReadJoypad (int which1)
+{
+	if(which1 < 1)
 	{
-		ds2_setCPUclocklevel(0);
-		ds2_setSupend();
-		do {
+		uint32 Controls;
+#ifdef ACCUMULATE_JOYPAD
+		Controls = (PreviousControls | ControlsPressed) & ~ControlsReleased;
+		PreviousControls = Controls;
+		ControlsPressed = ControlsReleased = 0x00000000;
+#else
+		{
+			struct key_buf inputdata;
 			ds2_getrawInput(&inputdata);
-			mdelay(1);
-		} while (inputdata.key & KEY_LID);
-		ds2_wakeup();
-		set_cpu_clock(clock_speed_number);
-	}
 
-	u32 HotkeyReturnToMenu = game_config.HotkeyReturnToMenu != 0 ? game_config.HotkeyReturnToMenu : emu_config.HotkeyReturnToMenu;
-	u32 HotkeyTemporaryFastForward = game_config.HotkeyTemporaryFastForward != 0 ? game_config.HotkeyTemporaryFastForward : emu_config.HotkeyTemporaryFastForward;
-	u32 HotkeyToggleSound = game_config.HotkeyToggleSound != 0 ? game_config.HotkeyToggleSound : emu_config.HotkeyToggleSound;
+			Controls = inputdata.key;
+		}
+#endif
 
-	if(inputdata.key & KEY_TOUCH ||
-		(HotkeyReturnToMenu && ((inputdata.key & HotkeyReturnToMenu) == HotkeyReturnToMenu))
-	)	//Active menu
-		Settings.Paused = 1;
+		if (Controls & KEY_LID)
+		{
+			LowFrequencyCPU();
+			ds2_setSupend();
+			struct key_buf inputdata;
+			do {
+				ds2_getrawInput(&inputdata);
+				mdelay(1);
+			} while (inputdata.key & KEY_LID);
+			ds2_wakeup();
+			// Before starting to emulate again, turn off the lower
+			// screen's backlight.
+			mdelay(100); // needed to avoid ds2_setBacklight crashing
+			ds2_setBacklight(2);
+			GameFrequencyCPU();
+		}
 
-	temporary_fast_forward =
-		(HotkeyTemporaryFastForward && ((inputdata.key & HotkeyTemporaryFastForward) == HotkeyTemporaryFastForward))
-	;
+		u32 HotkeyReturnToMenu = game_config.HotkeyReturnToMenu != 0 ? game_config.HotkeyReturnToMenu : emu_config.HotkeyReturnToMenu;
+		u32 HotkeyTemporaryFastForward = game_config.HotkeyTemporaryFastForward != 0 ? game_config.HotkeyTemporaryFastForward : emu_config.HotkeyTemporaryFastForward;
+		u32 HotkeyToggleSound = game_config.HotkeyToggleSound != 0 ? game_config.HotkeyToggleSound : emu_config.HotkeyToggleSound;
 
-	bool8 SoundToggleIsHeld = 
-		(HotkeyToggleSound && ((inputdata.key & HotkeyToggleSound) == HotkeyToggleSound))
-	;
+		if(Controls & KEY_TOUCH ||
+			(HotkeyReturnToMenu && ((Controls & HotkeyReturnToMenu) == HotkeyReturnToMenu))
+		)	//Active menu
+			Settings.Paused = 1;
 
-	if (SoundToggleIsHeld && !SoundToggleWasHeld)
-	{
-		game_enable_audio = !game_enable_audio;
-		game_disableAudio();
-	}
+		temporary_fast_forward =
+			(HotkeyTemporaryFastForward && ((Controls & HotkeyTemporaryFastForward) == HotkeyTemporaryFastForward))
+		;
 
-	SoundToggleWasHeld = SoundToggleIsHeld;
+		bool8 SoundToggleIsHeld = 
+			(HotkeyToggleSound && ((Controls & HotkeyToggleSound) == HotkeyToggleSound))
+		;
 
-	if(which1 < 1)
-	{
-		unsigned int key;
+		if (SoundToggleIsHeld && !SoundToggleWasHeld)
+		{
+			game_enable_audio = !game_enable_audio;
+			game_disableAudio();
+		}
+
+		SoundToggleWasHeld = SoundToggleIsHeld;
+
+		uint32 key = 0x80000000;  // Required by Snes9x
 
 		                                           //   DS   ->  SNES
-		key  = (inputdata.key & KEY_A     ) <<  7; // 0x0001 -> 0x0080
-		key |= (inputdata.key & KEY_B     ) << 14; // 0x0002 -> 0x8000
-		key |= (inputdata.key & KEY_SELECT) << 11; // 0x0004 -> 0x2000
-		key |= (inputdata.key & KEY_START ) <<  9; // 0x0008 -> 0x1000
-		key |= (inputdata.key & KEY_UP    ) <<  5; // 0x0040 -> 0x0800
+		key |= (Controls & KEY_A     ) <<  7;      // 0x0001 -> 0x0080
+		key |= (Controls & KEY_B     ) << 14;      // 0x0002 -> 0x8000
+		key |= (Controls & KEY_SELECT) << 11;      // 0x0004 -> 0x2000
+		key |= (Controls & KEY_START ) <<  9;      // 0x0008 -> 0x1000
+		key |= (Controls & KEY_UP    ) <<  5;      // 0x0040 -> 0x0800
 		// 0x0010 -> 0x0100; 0x0020 -> 0x0200
 		// 0x0030 -> 0x0300
-		key |= (inputdata.key & (KEY_RIGHT | KEY_LEFT))  <<  4;
+		key |= (Controls & (KEY_RIGHT | KEY_LEFT))  <<  4;
 		// 0x0100 -> 0x0010; 0x0200 -> 0x0020; 0x0400 -> 0x0040
 		// 0x0700 -> 0x0070
-		key |= (inputdata.key & (KEY_R | KEY_L | KEY_X)) >>  4;
+		key |= (Controls & (KEY_R | KEY_L | KEY_X)) >>  4;
 		// 0x0080 -> 0x0400; 0x0800 -> 0x4000
 		// 0x0880 -> 0x4400
-		key |= (inputdata.key & (KEY_DOWN | KEY_Y))      <<  3;
+		key |= (Controls & (KEY_DOWN | KEY_Y))      <<  3;
 /*
 		for(i= 0; i < 12; i++)	//remap key
 		{
@@ -1135,7 +1287,7 @@ unsigned int S9xReadJoypad (int which1)
 		}
 */
 
-		return (key | 0x80000000);
+		return key;
 	}
 	else
 		return 0;
diff --git a/source/nds/entry.h b/source/nds/entry.h
index a6bd350..0728768 100644
--- a/source/nds/entry.h
+++ b/source/nds/entry.h
@@ -7,7 +7,9 @@ extern "C" {
 
 	void game_restart(void);
 
-	int load_gamepak(char* file);
+	int load_gamepak(const char* file);
+
+	extern unsigned int AutoCPUFrequency;
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/nds/gui.c b/source/nds/gui.c
index 09e01ac..4299db2 100644
--- a/source/nds/gui.c
+++ b/source/nds/gui.c
@@ -45,23 +45,27 @@ char	rom_path[MAX_PATH];
 char	gamepak_name[MAX_PATH];
 char	gcheat_filename[MAX_PATH];
 
+//program arguments
+char  argv[2][MAX_PATH];
+
 // If adding a language, make sure you update the size of the array in
 // message.h too.
-char *lang[3] =
-	{ 
+char *lang[4] =
+	{
 		"English",					// 0
 		"简体中文",					// 1
-		"Français", 				// 2
+		"Français", 					// 2
+		"Deutsch",					// 3
 	};
 
-char *language_options[] = { (char *) &lang[0], (char *) &lang[1], (char *) &lang[2] };
+char *language_options[] = { (char *) &lang[0], (char *) &lang[1], (char *) &lang[2], (char *) &lang[3] };
 
 /******************************************************************************
 *	Macro definition
  ******************************************************************************/
 #define SUBMENU_ROW_NUM	6
 
-#define NDSSFC_VERSION "1.23"
+#define NDSSFC_VERSION "1.28"
 
 #define SAVE_STATE_SLOT_NUM		16
 
@@ -289,7 +293,6 @@ u32 game_enable_audio = 1;
 /******************************************************************************
  ******************************************************************************/
 static u32 menu_cheat_page = 0;
-u32 clock_speed_number = 5;
 u32 gamepad_config_menu;
 
 /******************************************************************************
@@ -324,6 +327,21 @@ gui_action_type get_gui_input(void)
 
 	key = getKey();
 
+	if (key & KEY_LID)
+	{
+		ds2_setSupend();
+		struct key_buf inputdata;
+		do {
+			ds2_getrawInput(&inputdata);
+			mdelay(1);
+		} while (inputdata.key & KEY_LID);
+		ds2_wakeup();
+		// In the menu, the lower screen's backlight needs to be on,
+		// and it is on right away after resuming from suspend.
+		// mdelay(100); // needed to avoid ds2_setBacklight crashing
+		// ds2_setBacklight(3);
+	}
+
 	switch(key)
 	{
 		case KEY_UP:
@@ -420,53 +438,52 @@ void change_ext(char *src, char *buffer, char *extension)
 --------------------------------------------------------*/
 static int sort_function(const void *dest_str_ptr, const void *src_str_ptr)
 {
-	char *dest_str = *((char **)dest_str_ptr);
-	char *src_str = *((char **)src_str_ptr);
+	char *dest_str = ((char *)dest_str_ptr);
+	char *src_str = ((char *)src_str_ptr);
 
 	// For files and directories, . and .. sort first.
-	if(src_str[0] == '.')
+	if(src_str[0] == '.' && dest_str[0] != '.')
 		return 1;
 
-	if(dest_str[0] == '.')
+	if(dest_str[0] == '.' && src_str[0] != '.')
 		return -1;
 
 	return strcasecmp(dest_str, src_str);
 }
 
-static int my_array_partion(void *array, int left, int right)
+static int my_array_partion(void **array, int left, int right)
 {
-    unsigned int pivot= *((unsigned int*)array + left);
-
-    while(left < right)
-    {
-        while(sort_function((void*)((unsigned int*)array+left), (void*)((unsigned int *)array+right)) < 0) {
-            right--;
-        }
-
-        if(right== left) break;
-        *((unsigned int*)array + left) = *((unsigned int*)array + right);
-        *((unsigned int*)array + right) = pivot;
-
-        if(left < right)
-        {
-            left++;
-            if(right== left) break;
-        }
-
-        while(sort_function((void*)((unsigned int*)array+right), (void*)((unsigned int *)array+left)) > 0) {
-            left++;
-        }
+	// Choose a pivot, left <= pivot <= right
+	unsigned int pivotIndex = left + (right - left) / 2;
+
+	// Move pivot value to the end
+	void *temp = array[pivotIndex];
+	array[pivotIndex] = array[right];
+	array[right] = temp;
+
+	// Move values that sort before the pivot value to before the new
+	// pivot's location
+	unsigned int storeIndex = left, i;
+	for (i = left; i <= right - 1; i++)
+	{
+		if (sort_function(array[i], array[right]) < 0)
+		{
+			temp = array[i];
+			array[i] = array[storeIndex];
+			array[storeIndex] = temp;
+			storeIndex++;
+		}
+	}
 
-        if(left== right) break;
-        *((unsigned int*)array + right) = *((unsigned int*)array + left);
-        *((unsigned int*)array + left) = pivot;
-        right--;
-    }
+	// Move the pivot value to its correct location
+	temp = array[storeIndex];
+	array[storeIndex] = array[right];
+	array[right] = temp;
 
-    return left;
+	return storeIndex;
 }
 
-static void my_qsort(void *array, int left, int right)
+static void my_qsort(void **array, int left, int right)
 {
     if(left < right)
     {
@@ -558,7 +575,7 @@ static int manage_filelist_info(struct FILE_LIST_INFO *filelist_infop, int flag)
 	int i;
 	void *pt;
 
-	//Increase all 
+	//Increase all
 	if(flag & 0x1)
 	{
 		i = NAME_MEM_SIZE;
@@ -733,9 +750,9 @@ static int load_file_list(struct FILE_LIST_INFO *filelist_infop)
 #if 0
     my_qsort((void *)file_list, 0, num_files-1);
 #else	//to support ".." directory, but take it as file
-    my_qsort((void *)file_list, 1, num_files-1);
+    my_qsort((void **)file_list, 1, num_files-1);
 #endif
-    my_qsort((void *)dir_list, 0, num_dirs-1);
+    my_qsort((void **)dir_list, 0, num_dirs-1);
 
     return 0;
 }
@@ -820,6 +837,7 @@ s32 load_file(char **wildcards, char *result, char *default_dir_name)
 		{
 			case CURSOR_TOUCH:
 				ds2_getrawInput(&inputdata);
+				wait_Allkey_release(0);
 				// ___ 33        This screen has 6 possible rows. Touches
 				// ___ 60        above or below these are ignored.
 				// . . . (+27)
@@ -985,6 +1003,7 @@ s32 load_file(char **wildcards, char *result, char *default_dir_name)
 				break;
 
 			case CURSOR_SELECT:
+				wait_Allkey_release(0);
 				//file selected
 				if(selected_item_on_list + 1 <= num_files)
 				{
@@ -1024,6 +1043,7 @@ s32 load_file(char **wildcards, char *result, char *default_dir_name)
 
 			case CURSOR_BACK:
 			{
+				wait_Allkey_release(0);
 				char *ext_pos;
 
 				strcpy(filelist_info.current_path, default_dir_name);
@@ -1041,6 +1061,7 @@ s32 load_file(char **wildcards, char *result, char *default_dir_name)
 			}
 
 			case CURSOR_EXIT:
+				wait_Allkey_release(0);
 				return_value = -1;
 				repeat = 0;
 				break;
@@ -1082,7 +1103,7 @@ s32 load_file(char **wildcards, char *result, char *default_dir_name)
 			//Path
 			if(-1 == redraw) {
 				draw_hscroll_over(0);
-				draw_hscroll_init(down_screen_addr, 49, 10, 170, COLOR_TRANS, 
+				draw_hscroll_init(down_screen_addr, 49, 10, 170, COLOR_TRANS,
 					COLOR_WHITE, default_dir_name);
 				path_scroll = 0x8000;		//first scroll left
 			}
@@ -1129,7 +1150,7 @@ s32 load_file(char **wildcards, char *result, char *default_dir_name)
 					pt = file_list[m];
 				}
 
-				draw_hscroll_init(down_screen_addr, 41, 40 + k*27, 185, 
+				draw_hscroll_init(down_screen_addr, 41, 40 + k*27, 185,
 					COLOR_TRANS, color, pt);
 			}
 
@@ -1260,7 +1281,7 @@ u32 play_screen_snapshot(void)
 
         if(draw_yesno_dialog(DOWN_SCREEN, 115, msg[MSG_GENERAL_CONFIRM_WITH_A], msg[MSG_GENERAL_CANCEL_WITH_B]))
             return 1;
-        else 
+        else
             return 0;
     }
 
@@ -1365,7 +1386,7 @@ u32 play_screen_snapshot(void)
                         time1= time0;
                     }
                     break;
-                    
+
                 case CURSOR_DOWN:
                     if(!pause)
                     {
@@ -1373,21 +1394,21 @@ u32 play_screen_snapshot(void)
                         time1= time0;
                     }
                     break;
-                    
+
                 case CURSOR_LEFT:
                     time1 = ticks;
                     if(i > 1) i -= 2;
                     else if(i == 1) i= file_num -1;
                     else i= file_num -2;
                     break;
-                
+
                 case CURSOR_RIGHT:
                     time1 = ticks;
                     break;
-                
+
                 case CURSOR_SELECT:
                     if(!pause)
-                    { 
+                    {
                         time1 = -1;
                         pause= 1;
                     }
@@ -1395,15 +1416,15 @@ u32 play_screen_snapshot(void)
                     {
                         time1 = ticks;
                         pause= 0;
-                    } 
+                    }
                     break;
-                    
-                case CURSOR_BACK: 
+
+                case CURSOR_BACK:
                     if(screenp) free((void*)screenp);
                     //deconstruct filelist_info struct
 					manage_filelist_info(&filelist_info, -1);
 					repeat = 0;
-					break;                    
+					break;
 
                 default: gui_action= CURSOR_NONE;
                     break;
@@ -1443,7 +1464,7 @@ int search_dir(char *directory, char* directory_path)
 	//while((current_file = readdir(current_dir)) != NULL)
 	while((current_file = readdir_ex(current_dir, &st)) != NULL)
 	{
-		//Is directory 
+		//Is directory
 		if(S_ISDIR(st.st_mode))
 		{
 			if(strcmp(".", current_file->d_name) || strcmp("..", current_file->d_name))
@@ -1622,7 +1643,7 @@ int save_state(char* file, void* screen)
 	n = ftell(fp);
 
 	ds2_getTime(&time);
-    sprintf(str, "%02d-%02d %02d:%02d:%02d", 
+    sprintf(str, "%02d-%02d %02d:%02d:%02d",
 		time.month, time.day, time.hours, time.minutes, time.seconds);
 
 	PRINT_STRING_BG(screen, str, COLOR_WHITE, COLOR_BLACK, 0, 0);
@@ -1637,12 +1658,22 @@ int save_state(char* file, void* screen)
 	return 0;
 }
 
-void set_cpu_clock(u32 num)
+void LowFrequencyCPU()
 {
-	u32 clock_speed_table[6] = {6, 9, 10, 11, 12, 13};	//240, 300, 336, 360, 384, 394
+	ds2_setCPUclocklevel(0); // 60 MHz
+}
 
-	if(num <= 5)
-		ds2_setCPUclocklevel(clock_speed_table[num]);
+void HighFrequencyCPU()
+{
+	ds2_setCPUclocklevel(13); // 396 MHz
+}
+
+void GameFrequencyCPU()
+{
+	u32 clock_speed_table[6] = {6, 9, 10, 11, 12, 13};	//240, 300, 336, 360, 384, 396
+
+	if(game_config.clock_speed_number <= 5)
+		ds2_setCPUclocklevel(clock_speed_table[game_config.clock_speed_number]);
 }
 
 void savefast_int(void)
@@ -1668,7 +1699,7 @@ unsigned int frame_interval;
 /*--------------------------------------------------------
 	Main Menu
 --------------------------------------------------------*/
-u32 menu(u16 *screen)
+u32 menu(u16 *screen, bool8 FirstInvocation)
 {
     gui_action_type gui_action;
     u32 i;
@@ -1684,7 +1715,7 @@ u32 menu(u16 *screen)
     MENU_TYPE *current_menu = NULL;
     MENU_OPTION_TYPE *current_option = NULL;
     MENU_OPTION_TYPE *display_option = NULL;
-    
+
     u32 current_option_num;
 //    u32 parent_option_num;
     u32 string_select;
@@ -1692,6 +1723,9 @@ u32 menu(u16 *screen)
     u16 *bg_screenp;
     u32 bg_screenp_color;
 
+    GAME_CONFIG PreviousGameConfig;  // Compared with current settings to
+    EMU_CONFIG  PreviousEmuConfig;   // determine if they need to be saved
+
 	auto void choose_menu();
 	auto void menu_return();
 	auto void menu_exit();
@@ -1732,7 +1766,9 @@ u32 menu(u16 *screen)
 	auto void latest_game_menu_end();
 	auto void language_set();
 	auto void game_fastforward();
+#ifdef ENABLE_FREE_SPACE
 	auto void show_card_space();
+#endif
 	auto void savestate_selitem(u32 sel, u32 y_pos);
 	auto void game_state_menu_passive();
 	auto void gamestate_delette_menu_passive();
@@ -1747,131 +1783,94 @@ u32 menu(u16 *screen)
 
 	void menu_exit()
 	{
-		ds2_setCPUclocklevel(13); // Crank it up, leave quickly
-        if(gamepak_name[0] != 0)
-        {
-			game_config.clock_speed_number = clock_speed_number;
-
-            reorder_latest_file();
+		HighFrequencyCPU(); // Crank it up, leave quickly
+		if(gamepak_name[0] != 0)
+		{
 			S9xAutoSaveSRAM ();
-			save_game_config_file();
 		}
-		save_emu_config_file();
 		quit();
 	}
 
-	void menu_load()
+	void SaveConfigsIfNeeded()
 	{
-		char *file_ext[] = { ".smc", ".sfc", ".zip", NULL };
-
-		if(gamepak_name[0] != 0)
-		{
-			S9xAutoSaveSRAM ();
+		if (memcmp(&PreviousGameConfig, &game_config, sizeof(GAME_CONFIG)) != 0)
 			save_game_config_file();
-		}
+		if (memcmp(&PreviousEmuConfig, &emu_config, sizeof(EMU_CONFIG)) != 0)
+			save_emu_config_file();
+	}
 
-		if(load_file(file_ext, tmp_filename, g_default_rom_dir) != -1)
-		{
-			strcpy(line_buffer, g_default_rom_dir);
-			strcat(line_buffer, "/");
-			strcat(line_buffer, tmp_filename);
+	void PreserveConfigs()
+	{
+		memcpy(&PreviousGameConfig, &game_config, sizeof(GAME_CONFIG));
+		memcpy(&PreviousEmuConfig, &emu_config, sizeof(EMU_CONFIG));
+	}
 
-			draw_message(down_screen_addr, bg_screenp, 28, 31, 227, 165, bg_screenp_color); 
-			draw_string_vcenter(down_screen_addr, 36, 100, 190, COLOR_MSSG, msg[MSG_PROGRESS_LOADING_GAME]);
-			ds2_flipScreen(DOWN_SCREEN, DOWN_SCREEN_UPDATE_METHOD);
+  int LoadGameAndItsData(char *filename){
+    if (gamepak_name[0] != '\0') {
+      S9xAutoSaveSRAM();
+    }
 
-			ds2_setCPUclocklevel(13);
-			int load_result = load_gamepak(line_buffer);
-			ds2_setCPUclocklevel(0);
-			if(load_result == -1)
-			{
-				first_load = 1;
-				gamepak_name[0] = '\0';
-				return;
-			}
+    draw_message(down_screen_addr, bg_screenp, 28, 31, 227, 165, bg_screenp_color);
+    draw_string_vcenter(down_screen_addr, 36, 100, 190, COLOR_MSSG, msg[MSG_PROGRESS_LOADING_GAME]);
+    ds2_flipScreen(DOWN_SCREEN, DOWN_SCREEN_UPDATE_METHOD);
 
-			strcpy(gamepak_name, tmp_filename);
-			first_load = 0;
-			load_game_config_file();
-//			time_period_action();
+    HighFrequencyCPU();
+    int load_result = load_gamepak(filename);
+    LowFrequencyCPU();
 
-			return_value = 1;
-			repeat = 0;
+    if(load_result == -1)
+    {
+      first_load = 1;
+      gamepak_name[0] = '\0';
+      return 0;
+    }
 
-			reorder_latest_file();
-			get_savestate_filelist();
+    char tempPath[MAX_PATH];
+    strcpy(tempPath, filename);
 
-			game_fast_forward= 0;
-		}
-		else
-		{
-			choose_menu(current_menu);
-		}
-	}
-	
-	bool Get_Args(char *file, char **filebuf)
-	{
-		FILE* dat = fat_fopen(file, "rb");
-		if(dat)
-		{
-			int i = 0;
-			while(!fat_feof (dat))
-			{
-				fat_fgets(filebuf[i], 512, dat);
-				int len = strlen(filebuf[i]);
-				if(filebuf[i][len - 1] == '\n')
-					filebuf[i][len - 1] = '\0';
-				i++;
-			}
-				
-			fat_fclose(dat);
-			fat_remove(file);
-			return i;
-		}
-		return 0;
-	}
+    //update folders and names for settings/config uses
+    char *dirEnd = strrchr(tempPath, '/');
+    //make sure a valid path was provided
+    if(!dirEnd)
+      return 0;
 
-	int CheckLoad_Arg()
-	{
-		char args[2][512];
-		char *argarray[2];
-		
-		argarray[0] = args[0];
-		argarray[1] = args[1];
-		
-		if(!Get_Args("/plgargs.dat", argarray))
-			return 0;
-	
-		fat_remove("plgargs.dat");
-	
-		draw_message(down_screen_addr, bg_screenp, 28, 31, 227, 165, bg_screenp_color); 
-		draw_string_vcenter(down_screen_addr, 36, 100, 190, COLOR_MSSG, msg[MSG_PROGRESS_LOADING_GAME]);
-		ds2_flipScreen(DOWN_SCREEN, DOWN_SCREEN_UPDATE_METHOD);
+    //copy file name as gamepak_name
+    strcpy(gamepak_name, dirEnd+1);
+    //then strip filename from directory path and set it
+    *dirEnd = '\0';
+    strcpy(g_default_rom_dir, tempPath);
 
-		ds2_setCPUclocklevel(13);
-		int load_result = load_gamepak(args[1]);
-		ds2_setCPUclocklevel(0);
+    first_load = 0;
+    load_game_config_file();
+    PreserveConfigs(); // Make the emulator not save what we've JUST read
+    // but it will save the emulator configuration below for latest files
 
-		if(load_result == -1)
-		{
-			first_load = 1;
-			gamepak_name[0] = '\0';
-			return 0;
-		}	
+    return_value = 1;
+    repeat = 0;
 
-		strcpy(gamepak_name, args[1]);
-		first_load = 0;
-		load_game_config_file();
+    reorder_latest_file();
+    get_savestate_filelist();
 
-		return_value = 1;
-		repeat = 0;
+    game_fast_forward= 0;
+    return 1;
+  }
 
-		reorder_latest_file();
-		get_savestate_filelist();
+	void menu_load()
+	{
+		char *file_ext[] = { ".smc", ".sfc", ".zip", NULL };
+
+		if(load_file(file_ext, tmp_filename, g_default_rom_dir) != -1)
+		{
+			strcpy(line_buffer, g_default_rom_dir);
+			strcat(line_buffer, "/");
+			strcat(line_buffer, tmp_filename);
 
-		game_fast_forward= 0;
-		return 1;		
-	
+			LoadGameAndItsData(line_buffer);
+		}
+		else
+		{
+			choose_menu(current_menu);
+		}
 	}
 
 	void menu_restart()
@@ -2060,9 +2059,9 @@ u32 menu(u16 *screen)
 				draw_string_vcenter(down_screen_addr, 36, 100, 190, COLOR_MSSG, msg[MSG_PROGRESS_SAVED_STATE_CREATING]);
 				ds2_flipScreen(DOWN_SCREEN, DOWN_SCREEN_UPDATE_METHOD);
 
-				ds2_setCPUclocklevel(13);
+				HighFrequencyCPU();
 				int flag = save_state(tmp_filename, (void*)screen);
-				ds2_setCPUclocklevel(0);
+				LowFrequencyCPU();
 				//clear message
 				draw_message(down_screen_addr, NULL, 28, 31, 227, 96, 0);
 				if(flag < 0)
@@ -2076,17 +2075,13 @@ u32 menu(u16 *screen)
 
 				ds2_flipScreen(DOWN_SCREEN, DOWN_SCREEN_UPDATE_METHOD);
 
-				//save game config
-				reorder_latest_file();
-				save_game_config_file();
-
 				SavedStateCacheInvalidate ();
 
 				mdelay(500); // let the progress message linger
 			}
 		}
 	}
-   
+
 	void menu_load_state()
 	{
 		if(!first_load)
@@ -2126,12 +2121,12 @@ u32 menu(u16 *screen)
 				//right
 				if(gui_action == CURSOR_SELECT)
 				{
-					draw_message(down_screen_addr, bg_screenp, 28, 31, 227, 165, bg_screenp_color); 
+					draw_message(down_screen_addr, bg_screenp, 28, 31, 227, 165, bg_screenp_color);
 					draw_string_vcenter(up_screen_addr, 36, 75, 190, COLOR_MSSG, msg[MSG_PROGRESS_SAVED_STATE_LOADING]);
 
-					ds2_setCPUclocklevel(13);
+					HighFrequencyCPU();
 					int flag = load_state(tmp_filename);
-					ds2_setCPUclocklevel(0);
+					LowFrequencyCPU();
 					if(0 == flag)
 					{
 						return_value = 1;
@@ -2146,9 +2141,9 @@ u32 menu(u16 *screen)
 				}
 				else	//load screen snapshot
 				{
-					ds2_setCPUclocklevel(13);
+					HighFrequencyCPU();
 					load_game_stat_snapshot(tmp_filename);
-					ds2_setCPUclocklevel(0);
+					LowFrequencyCPU();
 				}
 			}
 			else
@@ -2210,7 +2205,7 @@ u32 menu(u16 *screen)
 			}
 			else if(current_option_num == 2)    //delette single
 			{
-				draw_message(down_screen_addr, bg_screenp, 28, 31, 227, 165, bg_screenp_color); 
+				draw_message(down_screen_addr, bg_screenp, 28, 31, 227, 165, bg_screenp_color);
 
 				if(SavedStateFileExists(delette_savestate_num))
 				{
@@ -2278,7 +2273,7 @@ u32 menu(u16 *screen)
 					{
 						m= current_menu->screen_focus -1;
 						draw_hscroll_over(m+1);
-						draw_hscroll_init(down_screen_addr, 23, 40 + m*27, 200, 
+						draw_hscroll_init(down_screen_addr, 23, 40 + m*27, 200,
 							COLOR_TRANS, COLOR_INACTIVE_ITEM, *dynamic_cheat_options[current_option_num].display_string);
 					}
 					else
@@ -2288,7 +2283,7 @@ u32 menu(u16 *screen)
 
 						m= current_menu->focus_option - current_menu->screen_focus+2;
 						for(n= 0; n < SUBMENU_ROW_NUM-1; n++)
-							draw_hscroll_init(down_screen_addr, 23, 40 + n*27, 200, 
+							draw_hscroll_init(down_screen_addr, 23, 40 + n*27, 200,
 								COLOR_TRANS, COLOR_INACTIVE_ITEM, *dynamic_cheat_options[m+n].display_string);
 					}
 				}
@@ -2296,7 +2291,7 @@ u32 menu(u16 *screen)
 				if(current_option_num == 0)
 				{
 					draw_hscroll_over(0);
-					draw_hscroll_init(down_screen_addr, 50, 9, 180, 
+					draw_hscroll_init(down_screen_addr, 50, 9, 180,
 						COLOR_TRANS, COLOR_ACTIVE_ITEM, *dynamic_cheat_options[0].display_string);
 				}
 
@@ -2309,7 +2304,7 @@ u32 menu(u16 *screen)
 					if(m >= SUBMENU_ROW_NUM) m -= 1;
 
 					draw_hscroll_over(m+1);
-					draw_hscroll_init(down_screen_addr, 23, 40 + m*27, 200, 
+					draw_hscroll_init(down_screen_addr, 23, 40 + m*27, 200,
 						COLOR_TRANS, COLOR_ACTIVE_ITEM, *dynamic_cheat_options[current_option_num].display_string);
 				}
 
@@ -2323,7 +2318,7 @@ u32 menu(u16 *screen)
 					{
 						m = current_menu->screen_focus -1;
 						draw_hscroll_over(m+1);
-						draw_hscroll_init(down_screen_addr, 23, 40 + m*27, 200, 
+						draw_hscroll_init(down_screen_addr, 23, 40 + m*27, 200,
 							COLOR_TRANS, COLOR_INACTIVE_ITEM, *dynamic_cheat_options[current_option_num].display_string);
 					}
 					else
@@ -2338,7 +2333,7 @@ u32 menu(u16 *screen)
 						if(k > SUBMENU_ROW_NUM) k = SUBMENU_ROW_NUM;
 
 						for(n= 1; n < k; n++)
-							draw_hscroll_init(down_screen_addr, 23, 40 + n*27, 200, 
+							draw_hscroll_init(down_screen_addr, 23, 40 + n*27, 200,
 								COLOR_TRANS, COLOR_INACTIVE_ITEM, *dynamic_cheat_options[m+n].display_string);
 					}
 				}
@@ -2350,7 +2345,7 @@ u32 menu(u16 *screen)
 					if(current_option_num == 0)
 					{
 						draw_hscroll_over(0);
-						draw_hscroll_init(down_screen_addr, 50, 9, 180, 
+						draw_hscroll_init(down_screen_addr, 50, 9, 180,
 							COLOR_TRANS, COLOR_ACTIVE_ITEM, *dynamic_cheat_options[0].display_string);
 					}
 				}
@@ -2365,7 +2360,7 @@ u32 menu(u16 *screen)
 						m = current_menu->screen_focus -1;
 
 					draw_hscroll_over(m+1);
-					draw_hscroll_init(down_screen_addr, 23, 40 + m*27, 200, 
+					draw_hscroll_init(down_screen_addr, 23, 40 + m*27, 200,
 						COLOR_TRANS, COLOR_ACTIVE_ITEM, *dynamic_cheat_options[current_option_num].display_string);
 				}
 		        	break;
@@ -2641,7 +2636,7 @@ u32 menu(u16 *screen)
 
 		mm = *(display_option->current_option);
 		sprintf(line_buffer, *(display_option->display_string), str[mm]);
-		
+
         PRINT_STRING_BG(down_screen_addr, line_buffer, color, COLOR_TRANS, 27,
             38 + (display_option-> line_number)*32);
 	}
@@ -2718,22 +2713,9 @@ u32 menu(u16 *screen)
     {
         if(gui_action == CURSOR_LEFT || gui_action == CURSOR_RIGHT)
         {
-            ds2_setCPUclocklevel(13); // crank it up
-            if(bg_screenp != NULL)
-            {
-                bg_screenp_color = COLOR16(43, 11, 11);
-                memcpy(bg_screenp, down_screen_addr, 256*192*2);
-            }
-            else
-                bg_screenp_color = COLOR_BG;
+            HighFrequencyCPU(); // crank it up
 
-            draw_message(down_screen_addr, bg_screenp, 28, 31, 227, 165, bg_screenp_color);
-            draw_string_vcenter(down_screen_addr, 36, 75, 190, COLOR_MSSG, msg[MSG_CHANGE_LANGUAGE]);
-            draw_string_vcenter(down_screen_addr, 36, 95, 190, COLOR_MSSG, msg[MSG_CHANGE_LANGUAGE_WAITING]);
-            ds2_flipScreen(DOWN_SCREEN, DOWN_SCREEN_UPDATE_METHOD);
-
-            load_language_msg(LANGUAGE_PACK, emu_config.language);    
-            // gui_change_icon(emu_config.language); // uncomment if images change per language [Neb]
+            load_language_msg(LANGUAGE_PACK, emu_config.language);
 
             if(first_load)
             {
@@ -2742,12 +2724,11 @@ u32 menu(u16 *screen)
 				ds2_flipScreen(UP_SCREEN, 1);
             }
 
-            save_emu_config_file();
-            ds2_setCPUclocklevel(0); // and back down
-            wait_Allkey_release(0);
+            LowFrequencyCPU(); // and back down
         }
     }
 
+#ifdef ENABLE_FREE_SPACE
 	unsigned int freespace;
     void show_card_space ()
     {
@@ -2791,6 +2772,7 @@ u32 menu(u16 *screen)
         PRINT_STRING_BG(down_screen_addr, line_buffer, COLOR_INACTIVE_ITEM, COLOR_TRANS, 147,
             40 + (display_option->line_number)*27);
     }
+#endif
 
     char *screen_ratio_options[] = { (char*)&msg[MSG_VIDEO_ASPECT_RATIO_0],
 									(char*)&msg[MSG_VIDEO_ASPECT_RATIO_1],
@@ -2800,6 +2782,10 @@ u32 menu(u16 *screen)
     
     char *frameskip_options[] = { (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_AUTOMATIC], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_0], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_1], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_2], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_3], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_4], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_5], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_6], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_7], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_8], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_9], (char*)&msg[MSG_VIDEO_FRAME_SKIPPING_10] };
 
+    char *cpu_frequency_options[] = { (char*)&msg[MSG_OPTIONS_CPU_FREQUENCY_0], (char*)&msg[MSG_OPTIONS_CPU_FREQUENCY_1], (char*)&msg[MSG_OPTIONS_CPU_FREQUENCY_2], (char*)&msg[MSG_OPTIONS_CPU_FREQUENCY_3], (char*)&msg[MSG_OPTIONS_CPU_FREQUENCY_4], (char*)&msg[MSG_OPTIONS_CPU_FREQUENCY_5] };
+
+    char *fluidity_options[] = { (char*)&msg[MSG_VIDEO_AUDIO_FLUIDITY_PREFER_VIDEO], (char*)&msg[MSG_VIDEO_AUDIO_FLUIDITY_PREFER_AUDIO] };
+
     char *on_off_options[] = { (char*)&msg[MSG_GENERAL_OFF], (char*)&msg[MSG_GENERAL_ON] };
 
     char *sound_seletion[] = { (char*)&msg[MSG_AUDIO_MUTED], (char*)&msg[MSG_AUDIO_ENABLED] };
@@ -2815,17 +2801,20 @@ u32 menu(u16 *screen)
 	{
 	/* 00 */ SUBMENU_OPTION(NULL, &msg[MSG_MAIN_MENU_VIDEO_AUDIO], NULL, 0),
 
-    /* 01 */ STRING_SELECTION_OPTION(NULL, NULL, &msg[FMT_VIDEO_ASPECT_RATIO], screen_ratio_options, 
+    /* 01 */ STRING_SELECTION_OPTION(NULL, NULL, &msg[FMT_VIDEO_ASPECT_RATIO], screen_ratio_options,
         &game_config.graphic, 5, NULL, PASSIVE_TYPE, 1),
 
-	/* 02 */ STRING_SELECTION_OPTION(game_fastforward, NULL, &msg[FMT_VIDEO_FAST_FORWARD], on_off_options, 
+	/* 02 */ STRING_SELECTION_OPTION(game_fastforward, NULL, &msg[FMT_VIDEO_FAST_FORWARD], on_off_options,
 		&game_fast_forward, 2, NULL, ACTION_TYPE, 2),
-		
+
 	/* 03 */	STRING_SELECTION_OPTION(game_disableAudio, NULL, &msg[FMT_AUDIO_SOUND], sound_seletion,
 		&game_enable_audio, 2, NULL, ACTION_TYPE, 3),
-		
-	/* 04 */	STRING_SELECTION_OPTION(game_set_frameskip, NULL, &msg[FMT_VIDEO_FRAME_SKIPPING], frameskip_options,
-		&game_config.frameskip_value, 12 /* auto (0) and 0..10 (1..11) make 12 option values */, NULL, ACTION_TYPE, 4)
+
+	/* 04 */	STRING_SELECTION_OPTION(game_set_fluidity, NULL, &msg[FMT_VIDEO_AUDIO_FLUIDITY_PREFERENCE], fluidity_options,
+		&game_config.SoundSync, 2, NULL, ACTION_TYPE, 4),
+
+	/* 05 */	STRING_SELECTION_OPTION(game_set_frameskip, NULL, &msg[FMT_VIDEO_FRAME_SKIPPING], frameskip_options,
+		&game_config.frameskip_value, 12 /* auto (0) and 0..10 (1..11) make 12 option values */, NULL, ACTION_TYPE, 5)
 	};
 
 	MAKE_MENU(graphics, NULL, NULL, NULL, NULL, 0, 0);
@@ -2854,10 +2843,12 @@ u32 menu(u16 *screen)
 	{
 	/* 00 */ SUBMENU_OPTION(NULL, &msg[MSG_MAIN_MENU_SAVED_STATES], NULL, 0),
 
-	/* 01 */ NUMERIC_SELECTION_ACTION_OPTION(menu_save_state, NULL, &msg[FMT_SAVED_STATE_CREATE], &savestate_index, SAVE_STATE_SLOT_NUM, NULL, 1),
+	// savestate_index is still a signed int
+	/* 01 */ NUMERIC_SELECTION_ACTION_OPTION(menu_save_state, NULL, &msg[FMT_SAVED_STATE_CREATE], (u32*) &savestate_index, SAVE_STATE_SLOT_NUM, NULL, 1),
 
+	// savestate_index is still a signed int
 	/* 02 */ NUMERIC_SELECTION_ACTION_OPTION(menu_load_state, NULL,
-        &msg[FMT_SAVED_STATE_LOAD], &savestate_index, SAVE_STATE_SLOT_NUM, NULL, 2),
+        &msg[FMT_SAVED_STATE_LOAD], (u32*) &savestate_index, SAVE_STATE_SLOT_NUM, NULL, 2),
 
 	/* 03 */ SUBMENU_OPTION(&gamestate_delette_menu, &msg[MSG_SAVED_STATE_DELETE_GENERAL], NULL, 5),
 	};
@@ -2871,9 +2862,9 @@ u32 menu(u16 *screen)
 	{
 	/* 00 */ SUBMENU_OPTION(NULL, &msg[MSG_MAIN_MENU_CHEATS], NULL,0),
 
-	/* 01 */ CHEAT_OPTION(cheat_option_action, cheat_option_passive, 
+	/* 01 */ CHEAT_OPTION(cheat_option_action, cheat_option_passive,
 		((CHEATS_PER_PAGE * menu_cheat_page) + 0), 1),
-	/* 02 */ CHEAT_OPTION(cheat_option_action, cheat_option_passive, 
+	/* 02 */ CHEAT_OPTION(cheat_option_action, cheat_option_passive,
 		((CHEATS_PER_PAGE * menu_cheat_page) + 1), 2),
 	/* 03 */ CHEAT_OPTION(cheat_option_action, cheat_option_passive,
 		((CHEATS_PER_PAGE * menu_cheat_page) + 2), 3),
@@ -2940,7 +2931,7 @@ u32 menu(u16 *screen)
   /*--------------------------------------------------------
      Tools
   --------------------------------------------------------*/
-    MENU_OPTION_TYPE tools_options[] = 
+    MENU_OPTION_TYPE tools_options[] =
     {
 	/* 00 */ SUBMENU_OPTION(NULL, &msg[MSG_MAIN_MENU_TOOLS], NULL, 0),
 
@@ -2952,10 +2943,10 @@ u32 menu(u16 *screen)
 
 //	/* 02 */ SUBMENU_OPTION(&tools_keyremap_menu, &msg[MSG_SUB_MENU_31], NULL, 2),
 
-//	/* 03 */ STRING_SELECTION_OPTION(time_backward_action, NULL, &msg[MSG_SUB_MENU_302], on_off_options, 
+//	/* 03 */ STRING_SELECTION_OPTION(time_backward_action, NULL, &msg[MSG_SUB_MENU_302], on_off_options,
 //			&game_config.backward, 2, NULL, ACTION_TYPE, 3),
 
-//	/* 04 */ NUMERIC_SELECTION_ACTION_OPTION(time_period_action, time_period_passive, &msg[MSG_SUB_MENU_32], 
+//	/* 04 */ NUMERIC_SELECTION_ACTION_OPTION(time_period_action, time_period_passive, &msg[MSG_SUB_MENU_32],
 //		&game_config.backward_time, 6, NULL, 4)
     };
 
@@ -2969,18 +2960,33 @@ u32 menu(u16 *screen)
 	{
 	/* 00 */ SUBMENU_OPTION(NULL, &msg[MSG_MAIN_MENU_OPTIONS], NULL, 0),
 
-	//CPU speed
-	/* 01 */ NUMERIC_SELECTION_OPTION(NULL, &msg[FMT_OPTIONS_CPU_FREQUENCY], &clock_speed_number, 6, NULL, 1),
+	//CPU speed (string: shows MHz)
+	/* 01 */ STRING_SELECTION_OPTION(NULL, NULL, &msg[FMT_OPTIONS_CPU_FREQUENCY], cpu_frequency_options, 
+        &game_config.clock_speed_number, 6, NULL, PASSIVE_TYPE, 1),
 
 	/* 02 */ STRING_SELECTION_OPTION(language_set, NULL, &msg[FMT_OPTIONS_LANGUAGE], language_options, 
         &emu_config.language, sizeof(language_options) / sizeof(language_options[0]) /* number of possible languages */, NULL, ACTION_TYPE, 2),
 
+#ifdef ENABLE_FREE_SPACE
 	/* 03 */ STRING_SELECTION_OPTION(NULL, show_card_space, &msg[MSG_OPTIONS_CARD_CAPACITY], NULL, 
         &desert, 2, NULL, PASSIVE_TYPE | HIDEN_TYPE, 3),
+#endif
 
-	/* 04 */ ACTION_OPTION(load_default_setting, NULL, &msg[MSG_OPTIONS_RESET], NULL, 4),
+	/* 04 */ ACTION_OPTION(load_default_setting, NULL, &msg[MSG_OPTIONS_RESET], NULL, 
+#ifdef ENABLE_FREE_SPACE
+			4
+#else
+			3
+#endif
+		),
 
-	/* 05 */ ACTION_OPTION(check_gbaemu_version, NULL, &msg[MSG_OPTIONS_VERSION], NULL, 5),
+	/* 05 */ ACTION_OPTION(check_gbaemu_version, NULL, &msg[MSG_OPTIONS_VERSION], NULL, 
+#ifdef ENABLE_FREE_SPACE
+			5
+#else
+			4
+#endif
+		),
 	};
 
 	MAKE_MENU(others, others_menu_init, NULL, NULL, NULL, 1, 1);
@@ -2989,7 +2995,7 @@ u32 menu(u16 *screen)
      Load_game
   --------------------------------------------------------*/
     MENU_TYPE latest_game_menu;
-  
+
     MENU_OPTION_TYPE load_game_options[] =
     {
 	/* 00 */ SUBMENU_OPTION(NULL, &msg[MSG_LOAD_GAME_MENU_TITLE], NULL, 0),
@@ -3120,7 +3126,7 @@ u32 menu(u16 *screen)
 			show_icon(down_screen_addr, &ICON_MSEL, 173, 131);
 		}
 		else {
-			show_icon(down_screen_addr, &ICON_NEXIT, 187, 75);	
+			show_icon(down_screen_addr, &ICON_NEXIT, 187, 75);
 			show_icon(down_screen_addr, &ICON_MNSEL, 173, 131);
 		}
 		draw_string_vcenter(down_screen_addr, 175, 131, 75, COLOR_WHITE, line_buffer);
@@ -3315,7 +3321,7 @@ u32 menu(u16 *screen)
         {
             ext_pos= strrchr(emu_config.latest_file[k], '/');
             if(ext_pos != NULL)
-                draw_hscroll_init(down_screen_addr, 26, 40 + k*27, 200, 
+                draw_hscroll_init(down_screen_addr, 26, 40 + k*27, 200,
                     COLOR_TRANS, COLOR_INACTIVE_ITEM, ext_pos+1);
 			else
 				break;
@@ -3373,7 +3379,7 @@ u32 menu(u16 *screen)
     void latest_game_menu_end()
     {
         u32 k;
-        
+
         for(k= 0; k < 5; k++)
         {
             if(emu_config.latest_file[k][0] != '\0')
@@ -3393,12 +3399,12 @@ u32 menu(u16 *screen)
 				{
 					draw_hscroll_over(current_option_num-1);
 	            	ext_pos= strrchr(emu_config.latest_file[current_option_num-1], '/');
-                	draw_hscroll_init(down_screen_addr, 26, 40 + (current_option_num-1)*27, 200, 
+                	draw_hscroll_init(down_screen_addr, 26, 40 + (current_option_num-1)*27, 200,
                 	    COLOR_TRANS, COLOR_INACTIVE_ITEM, ext_pos+1);
 				}
 
 				current_option_num += 1;
-				if(current_option_num >= latest_game_menu.num_options)	
+				if(current_option_num >= latest_game_menu.num_options)
 					current_option_num = 0;
                 current_option = current_menu->options + current_option_num;
 
@@ -3407,7 +3413,7 @@ u32 menu(u16 *screen)
 				{
 					draw_hscroll_over(current_option_num-1);
 	            	ext_pos= strrchr(emu_config.latest_file[current_option_num-1], '/');
-                	draw_hscroll_init(down_screen_addr, 26, 40 + (current_option_num-1)*27, 200, 
+                	draw_hscroll_init(down_screen_addr, 26, 40 + (current_option_num-1)*27, 200,
                 	    COLOR_TRANS, COLOR_ACTIVE_ITEM, ext_pos+1);
 				}
 
@@ -3419,7 +3425,7 @@ u32 menu(u16 *screen)
 				{
 					draw_hscroll_over(current_option_num-1);
 	            	ext_pos= strrchr(emu_config.latest_file[current_option_num-1], '/');
-                	draw_hscroll_init(down_screen_addr, 26, 40 + (current_option_num-1)*27, 200, 
+                	draw_hscroll_init(down_screen_addr, 26, 40 + (current_option_num-1)*27, 200,
                 	    COLOR_TRANS, COLOR_INACTIVE_ITEM, ext_pos+1);
 				}
 
@@ -3432,7 +3438,7 @@ u32 menu(u16 *screen)
 				{
 					draw_hscroll_over(current_option_num-1);
 	            	ext_pos= strrchr(emu_config.latest_file[current_option_num-1], '/');
-                	draw_hscroll_init(down_screen_addr, 26, 40 + (current_option_num-1)*27, 200, 
+                	draw_hscroll_init(down_screen_addr, 26, 40 + (current_option_num-1)*27, 200,
                 	    COLOR_TRANS, COLOR_ACTIVE_ITEM, ext_pos+1);
 				}
 
@@ -3455,16 +3461,6 @@ u32 menu(u16 *screen)
     {
 		char *ext_pos;
 
-		draw_message(down_screen_addr, bg_screenp, 28, 31, 227, 165, 0);
-		draw_string_vcenter(down_screen_addr, 36, 100, 190, COLOR_MSSG, msg[MSG_PROGRESS_LOADING_GAME]);
-		ds2_flipScreen(DOWN_SCREEN, DOWN_SCREEN_UPDATE_METHOD);
-
-		if(gamepak_name[0] != 0)
-		{
-			S9xAutoSaveSRAM ();
-			save_game_config_file();
-		}
-
 		if(bg_screenp != NULL) {
 			bg_screenp_color = COLOR16(43, 11, 11);
 		}
@@ -3478,42 +3474,19 @@ u32 menu(u16 *screen)
 
 		ext_pos = emu_config.latest_file[current_option_num -1];
 
-		ds2_setCPUclocklevel(13);
-		int load_result = load_gamepak(ext_pos);
-		ds2_setCPUclocklevel(0);
-
-		if(load_result == -1) {
-			first_load = 1;
-			return;
-		}
-
-		strcpy(g_default_rom_dir, ext_pos);
-		ext_pos = strrchr(g_default_rom_dir, '/');
-		*ext_pos= '\0';
-		strcpy(gamepak_name, ext_pos+1);
-
-
-		load_game_config_file();
-//		time_period_action();
-
-		reorder_latest_file();
-		get_savestate_filelist();
-		game_fast_forward= 0;
+		LoadGameAndItsData(ext_pos);
 
 		get_newest_savestate(tmp_filename);
 		if(tmp_filename[0] != '\0')
 		{
 			load_state(tmp_filename);
 		}
-
-		return_value = 1;
-		repeat = 0;
     }
 
     void game_fastforward()
     {
     }
-	
+
 
 
 	void reload_cheats_page()
@@ -3527,11 +3500,13 @@ u32 menu(u16 *screen)
 
     void others_menu_init()
     {
+#ifdef ENABLE_FREE_SPACE
 		unsigned int total, used;
 
 		//get card space info
 		freespace = 0;
 		fat_getDiskSpaceInfo("fat:", &total, &used, &freespace);
+#endif
     }
 
 	void choose_menu(MENU_TYPE *new_menu)
@@ -3542,23 +3517,28 @@ u32 menu(u16 *screen)
 		if(NULL != current_menu) {
 			if(current_menu->end_function)
 				current_menu->end_function();
+			SaveConfigsIfNeeded();
 		}
 
 		current_menu = new_menu;
 		current_option_num= current_menu -> focus_option;
 		current_option = new_menu->options + current_option_num;
+		PreserveConfigs();
 		if(current_menu->init_function)
 			current_menu->init_function();
 	}
 
 //----------------------------------------------------------------------------//
 //	Menu Start
-	ds2_setCPUclocklevel(0);
-	mdelay(100); // to prevent ds2_setBacklight() from crashing
-	ds2_setBacklight(3);
-	
-	
-	wait_Allkey_release(0);
+	LowFrequencyCPU();
+	if (!FirstInvocation)
+	{ // assume that the backlight is already at 3 when the emulator starts
+		mdelay(100); // to prevent ds2_setBacklight() from crashing
+		ds2_setBacklight(3);
+		// also allow the user to press A for New Game right away
+		wait_Allkey_release(0);
+	}
+
     bg_screenp= (u16*)malloc(256*192*2);
 
 	repeat = 1;
@@ -3566,7 +3546,8 @@ u32 menu(u16 *screen)
 	if(gamepak_name[0] == 0)
 	{
 		first_load = 1;
-		if(CheckLoad_Arg())
+    //try auto loading games passed through argv first
+		if(strlen(argv[1]) > 0 && LoadGameAndItsData(argv[1]))
 			repeat = 0;
 		else
 		{
@@ -3589,7 +3570,7 @@ u32 menu(u16 *screen)
 	choose_menu(&main_menu);
 
 //	Menu loop
-	
+
 	while(repeat)
 	{
 		display_option = current_menu->options;
@@ -3638,7 +3619,7 @@ u32 menu(u16 *screen)
 				focus_option = line_num;
 			}
 			current_menu -> focus_option = focus_option;
-		
+
 			i = focus_option - screen_focus;
 			display_option += i +1;
 
@@ -3684,7 +3665,7 @@ u32 menu(u16 *screen)
 						color= COLOR_ACTIVE_ITEM;
 					else
 						color= COLOR_INACTIVE_ITEM;
-	
+
 					PRINT_STRING_BG(down_screen_addr, line_buffer, color, COLOR_TRANS, 23, 40 + i*27);
 				}
     	    }
@@ -3697,6 +3678,7 @@ u32 menu(u16 *screen)
 		{
 			case CURSOR_TOUCH:
 				ds2_getrawInput(&inputdata);
+				wait_Allkey_release(0);
 				/* Back button at the top of every menu but the main one */
 				if(current_menu != &main_menu && inputdata.x > 231 && inputdata.y <= 25)
 				{
@@ -3714,7 +3696,7 @@ u32 menu(u16 *screen)
 
 					current_option_num = (inputdata.y / 80) * 3 + (inputdata.x / 86);
 					current_option = current_menu->options + current_option_num;
-					
+
 					if(current_option -> option_type & HIDEN_TYPE)
 						break;
 					else if(current_option->option_type & ACTION_TYPE)
@@ -3723,11 +3705,10 @@ u32 menu(u16 *screen)
 						choose_menu(current_option->sub_menu);
 				}
 				/* This is the majority case, covering all menus except save states, screen shots, and game loading */
-				else if(current_menu != (main_menu.options + 1)->sub_menu 
+				else if(current_menu != (main_menu.options + 1)->sub_menu
 				&& current_menu != ((main_menu.options +1)->sub_menu->options + 3)->sub_menu
-				&& current_menu != (main_menu.options +3)->sub_menu 
+				&& current_menu != (main_menu.options +3)->sub_menu
 				&& current_menu != ((main_menu.options +3)->sub_menu->options + 1)->sub_menu
-				&& current_menu != ((main_menu.options +3)->sub_menu->options + 2)->sub_menu
 				&& current_menu != (main_menu.options +6)->sub_menu
 				&& current_menu != ((main_menu.options +6)->sub_menu->options + 2)->sub_menu)
 				{
@@ -3794,9 +3775,9 @@ u32 menu(u16 *screen)
 						next_option_num = 3;
 					else
 						break;
-					
+
 					struct _MENU_OPTION_TYPE *next_option = current_menu->options + next_option_num;
-					
+
 					if(next_option_num == 1 /* write */ || next_option_num == 2 /* read */)
 					{
 						u32 current_option_val = *(next_option->current_option);
@@ -3841,7 +3822,7 @@ u32 menu(u16 *screen)
 						}
 						break;
 					}
-					
+
 					gui_action = CURSOR_SELECT;
 					if(next_option -> option_type & HIDEN_TYPE)
 						break;
@@ -3868,9 +3849,9 @@ u32 menu(u16 *screen)
 						next_option_num = 2;
 					else
 						break;
-					
+
 					struct _MENU_OPTION_TYPE *next_option = current_menu->options + next_option_num;
-					
+
 					if(next_option_num == 2)
 					{
 						u32 current_option_val = *(next_option->current_option);
@@ -3908,7 +3889,7 @@ u32 menu(u16 *screen)
 						}
 						break;
 					}
-					
+
 					gui_action = CURSOR_SELECT;
 					if(next_option -> option_type & HIDEN_TYPE)
 						break;
@@ -4032,16 +4013,19 @@ u32 menu(u16 *screen)
 				break;
 
 			case CURSOR_EXIT:
+				wait_Allkey_release(0);
 				break;
 
 			case CURSOR_SELECT:
+				wait_Allkey_release(0);
 				if(current_option->option_type & ACTION_TYPE)
 					current_option->action_function();
 				else if(current_option->option_type & SUBMENU_TYPE)
 					choose_menu(current_option->sub_menu);
 				break;
 
-			case CURSOR_BACK: 
+			case CURSOR_BACK:
+				wait_Allkey_release(0);
 				if(current_menu != &main_menu)
 					choose_menu(current_menu->options->sub_menu);
 				else
@@ -4057,20 +4041,11 @@ u32 menu(u16 *screen)
 
 	if (current_menu && current_menu->end_function)
 		current_menu->end_function();
+	SaveConfigsIfNeeded();
 
 	destroy_dynamic_cheats();
 	if(bg_screenp != NULL) free((void*)bg_screenp);
-	
-	if(gamepak_name[0] != 0)
-	{
-		game_config.clock_speed_number = clock_speed_number;
 
-		reorder_latest_file();
-		S9xAutoSaveSRAM ();
-		save_game_config_file();
-	}
-	save_emu_config_file();
-	
 	ds2_clearScreen(DOWN_SCREEN, 0);
 	ds2_flipScreen(DOWN_SCREEN, DOWN_SCREEN_UPDATE_METHOD);
 	copy_screen(up_screen_addr, (void*) screen, 0, 0, 256, 192);
@@ -4080,7 +4055,7 @@ u32 menu(u16 *screen)
 	mdelay(100); // to prevent ds2_setBacklight() from crashing
 	ds2_setBacklight(2);
 
-	set_cpu_clock(clock_speed_number);
+	GameFrequencyCPU();
 
 	return return_value;
 }
@@ -4132,6 +4107,10 @@ int load_language_msg(char *filename, u32 language)
 		strcpy(start, "STARTFRENCH");
 		strcpy(end, "ENDFRENCH");
 		break;
+	case GERMAN:
+		strcpy(start, "STARTGERMAN");
+		strcpy(end, "ENDGERMAN");
+		break;
 	}
 	u32 cmplen = strlen(start);
 
@@ -4175,7 +4154,61 @@ int load_language_msg(char *filename, u32 language)
 			break;
 
 		len= strlen(pt);
-		memcpy(dst, pt, len);
+		// memcpy(dst, pt, len);
+
+		// Replace key definitions (*letter) with Pictochat icons
+		// while copying.
+		unsigned int curChar;
+		for (curChar = 0; curChar < len; curChar++)
+		{
+			if (pt[curChar] == '*')
+			{
+				switch (pt[curChar + 1])
+				{
+				case 'A':
+					memcpy(&dst[curChar], HOTKEY_A_DISPLAY, 2);
+					curChar++;
+					break;
+				case 'B':
+					memcpy(&dst[curChar], HOTKEY_B_DISPLAY, 2);
+					curChar++;
+					break;
+				case 'X':
+					memcpy(&dst[curChar], HOTKEY_X_DISPLAY, 2);
+					curChar++;
+					break;
+				case 'Y':
+					memcpy(&dst[curChar], HOTKEY_Y_DISPLAY, 2);
+					curChar++;
+					break;
+				case 'L':
+					memcpy(&dst[curChar], HOTKEY_L_DISPLAY, 2);
+					curChar++;
+					break;
+				case 'R':
+					memcpy(&dst[curChar], HOTKEY_R_DISPLAY, 2);
+					curChar++;
+					break;
+				case 'S':
+					memcpy(&dst[curChar], HOTKEY_START_DISPLAY, 2);
+					curChar++;
+					break;
+				case 's':
+					memcpy(&dst[curChar], HOTKEY_SELECT_DISPLAY, 2);
+					curChar++;
+					break;
+				case '\0':
+					dst[curChar] = pt[curChar];
+					break;
+				default:
+					memcpy(&dst[curChar], &pt[curChar], 2);
+					curChar++;
+					break;
+				}
+			}
+			else
+				dst[curChar] = pt[curChar];
+		}
 
 		dst += len;
 		//at a line return, when "\n" paded, this message not end
@@ -4198,7 +4231,7 @@ int load_language_msg(char *filename, u32 language)
 			else//a message end
 			{
 				if(*(dst-2) == 0x0D)
-				dst -= 1;
+					dst -= 1;
 				*(dst-1) = '\0';
 				msg[++loop] = dst;
 			}
@@ -4235,9 +4268,9 @@ u32 load_font()
 void init_game_config(void)
 {
 	game_config.clock_speed_number = 5;	// 396 MHz by default
-	clock_speed_number = 5;
 	game_config.graphic = 3; // By default, have a good-looking aspect ratio
 	game_config.frameskip_value = 0; // Automatic frame skipping
+	game_config.SoundSync = 0; // Prefer fluid images by default
 
 	game_config.backward = 0;	//time backward disable
 	game_config.backward_time = 2;	//time backward granularity 1s
@@ -4290,8 +4323,8 @@ void load_game_config_file(void)
 	{
 		fread(&game_config, 1, sizeof(GAME_CONFIG), fp);
 
-		clock_speed_number = game_config.clock_speed_number;
-		Settings.SkipFrames = (game_config.frameskip_value == 0 ? AUTO_FRAMERATE : game_config.frameskip_value - 1 /* 1 -> 0 and so on */);
+		game_set_frameskip();
+		game_set_fluidity();
 	}
 
 	fclose(fp);
@@ -4322,6 +4355,10 @@ int load_emu_config_file(void)
 			fclose(fp);
 			return 0;
 		}
+		else
+		{
+			fclose(fp);
+		}
 	}
 
 	//have no confiure file, set default
@@ -4342,7 +4379,7 @@ int save_game_config_file(void)
 
     sprintf(game_config_filename, "%s/%s", DEFAULT_CFG_DIR, gamepak_name);
     pt = strrchr(game_config_filename, '.');
-	if(NULL == pt) 
+	if(NULL == pt)
 		return -1;
 
     *pt = '\0';
@@ -4418,7 +4455,7 @@ void reorder_latest_file(void)
                 else
                     break;
             }
-            
+
             strcpy(emu_config.latest_file[i-1], full_file);
         }
         return ;
@@ -4584,7 +4621,7 @@ void get_newest_savestate(char *name_buffer)
     get_savestate_filename(latest_save, name_buffer);
 }
 
-static void get_timestamp_string(char *buffer, u16 msg_id, u16 year, u16 mon, 
+static void get_timestamp_string(char *buffer, u16 msg_id, u16 year, u16 mon,
     u16 day, u16 wday, u16 hour, u16 min, u16 sec, u32 msec)
 {
     char *weekday_strings[] =
@@ -4592,7 +4629,7 @@ static void get_timestamp_string(char *buffer, u16 msg_id, u16 year, u16 mon,
         "SUN", "MON", "TUE", "WED", "TUR", "FRI", "SAT"
     };
 
-    sprintf(buffer, "%s %02d/%02d/%04d %02d:%02d:%02d", weekday_strings[wday], 
+    sprintf(buffer, "%s %02d/%02d/%04d %02d:%02d:%02d", weekday_strings[wday],
         day, mon, year, hour, min, sec);
 }
 
@@ -4617,7 +4654,7 @@ static u32 save_ss_bmp(u16 *image)
 
     change_ext(gamepak_name, ss_filename, "_");
 	ds2_getTime(&current_time);
-    sprintf(save_ss_path, "%s/%s%02d%02d%02d%02d%02d.bmp", DEFAULT_SS_DIR, ss_filename, 
+    sprintf(save_ss_path, "%s/%s%02d%02d%02d%02d%02d.bmp", DEFAULT_SS_DIR, ss_filename,
     current_time.month, current_time.day, current_time.hours, current_time.minutes, current_time.seconds);
 
     for(y = 0; y < 192; y++)
@@ -4652,7 +4689,7 @@ void quit(void)
   __asm__ __volatile__("or %0, $0, $ra"
                         : "=r" (reg_ra)
                         :);
-  
+
   dbg_printf("return address= %08x\n", reg_ra);
 */
 
@@ -4678,11 +4715,44 @@ u32 file_length(FILE* file)
 /*
 *	GUI Initialize
 */
+static bool Get_Args(char *file, char **filebuf){
+  FILE* dat = fat_fopen(file, "rb");
+  if(dat){
+    int i = 0;
+    while(!fat_feof (dat)){
+      fat_fgets(filebuf[i], 512, dat);
+      int len = strlen(filebuf[i]);
+      if(filebuf[i][len - 1] == '\n')
+        filebuf[i][len - 1] = '\0';
+      i++;
+    }
+
+    fat_fclose(dat);
+    fat_remove(file);
+    return i;
+  }
+  return 0;
+}
+
+int CheckLoad_Arg(){
+  argv[0][0] = '\0';  // Initialise the first byte to be a NULL in case
+  argv[1][0] = '\0';  // there are no arguments to avoid uninit. memory
+  char *argarray[2];
+  argarray[0] = argv[0];
+  argarray[1] = argv[1];
+
+  if(!Get_Args("/plgargs.dat", argarray))
+    return 0;
+
+  fat_remove("plgargs.dat");
+  return 1;
+}
+
 void gui_init(u32 lang_id)
 {
 	int flag;
 
-	ds2_setCPUclocklevel(13); // Crank it up. When the menu starts, -> 0.
+	HighFrequencyCPU(); // Crank it up. When the menu starts, -> 0.
 
 	// Start with no saved state existing, as no game is loaded yet.
 	int i;
@@ -4695,7 +4765,17 @@ void gui_init(u32 lang_id)
     //Find the "CATSFC" system directory
     DIR *current_dir;
 
-    strcpy(main_path, "fat:/CATSFC");
+    if(CheckLoad_Arg()){
+      //copy new folder location
+      strcpy(main_path, "fat:");
+      strcat(main_path, argv[0]);
+      //strip off the binary name
+      char *endStr = strrchr(main_path, '/');
+      *endStr = '\0';
+    }
+    else
+      strcpy(main_path, "fat:/CATSFC");
+
     current_dir = opendir(main_path);
     if(current_dir)
         closedir(current_dir);
diff --git a/source/nds/gui.h b/source/nds/gui.h
index 87c14e4..290a927 100644
--- a/source/nds/gui.h
+++ b/source/nds/gui.h
@@ -59,7 +59,20 @@ struct _GAME_CONFIG
 	u32 HotkeyReturnToMenu;
 	u32 HotkeyTemporaryFastForward;
 	u32 HotkeyToggleSound;
-	u32  Reserved2[45];
+	u32 SoundSync;
+	/*
+	 * PreviouslyUsed_20130206_1 was for a second meaning of
+	 * frameskip_value that is now dropped.
+	 * THIS VALUE IS NOT GUARANTEED TO BE RESERVED AND SET TO 0.
+	 */
+	u32 PreviouslyUsed_20130206_1;
+	/*
+	 * PreviouslyUsed_20130206_2 was for a second meaning of
+	 * clock_speed_number that is now dropped.
+	 * THIS VALUE IS NOT GUARANTEED TO BE RESERVED AND SET TO 0.
+	 */
+	u32 PreviouslyUsed_20130206_2;
+	u32  Reserved2[42];
 };
 
 typedef enum
@@ -124,10 +137,13 @@ extern GAME_CONFIG	game_config;
 /******************************************************************************
  ******************************************************************************/
 extern void gui_init(u32 lang_id);
-extern u32 menu(u16 *original_screen);
+extern u32 menu(u16 *original_screen, bool8 FirstInvocation);
 extern void game_disableAudio();
 extern void game_set_frameskip();
-extern void set_cpu_clock(u32 num);
+extern void game_set_fluidity();
+extern void LowFrequencyCPU();
+extern void HighFrequencyCPU();
+extern void GameFrequencyCPU();
 extern int load_language_msg(char *filename, u32 language);
 
 #ifdef __cplusplus
diff --git a/source/nds/message.h b/source/nds/message.h
index 0aff8d9..538bc3b 100644
--- a/source/nds/message.h
+++ b/source/nds/message.h
@@ -31,6 +31,9 @@ enum MSG
 	MSG_MAIN_MENU_TOOLS,
 	MSG_MAIN_MENU_OPTIONS,
 	MSG_MAIN_MENU_EXIT,
+	FMT_VIDEO_AUDIO_FLUIDITY_PREFERENCE,
+	MSG_VIDEO_AUDIO_FLUIDITY_PREFER_VIDEO,
+	MSG_VIDEO_AUDIO_FLUIDITY_PREFER_AUDIO,
 	FMT_VIDEO_ASPECT_RATIO,
 	FMT_VIDEO_FAST_FORWARD,
 	FMT_VIDEO_FRAME_SKIPPING,
@@ -41,21 +44,27 @@ enum MSG
 	FMT_CHEAT_PAGE,
 	MSG_CHEAT_LOAD_FROM_FILE,
 	MSG_TOOLS_SCREENSHOT_GENERAL,
-	MSG_TOOLS_GLOBAL_HOTKEY_GENERAL,    // currently unused
-	MSG_TOOLS_GAME_HOTKEY_GENERAL,      // currently unused
+	MSG_TOOLS_GLOBAL_HOTKEY_GENERAL,
+	MSG_TOOLS_GAME_HOTKEY_GENERAL,
 	FMT_OPTIONS_LANGUAGE,
 	FMT_OPTIONS_CPU_FREQUENCY,
-	MSG_OPTIONS_CARD_CAPACITY,
+	MSG_OPTIONS_CPU_FREQUENCY_0,
+	MSG_OPTIONS_CPU_FREQUENCY_1,
+	MSG_OPTIONS_CPU_FREQUENCY_2,
+	MSG_OPTIONS_CPU_FREQUENCY_3,
+	MSG_OPTIONS_CPU_FREQUENCY_4,
+	MSG_OPTIONS_CPU_FREQUENCY_5,
+	MSG_OPTIONS_CARD_CAPACITY /* unused if !defined(ENABLE_FREE_SPACE) */,
 	MSG_OPTIONS_RESET,
 	MSG_OPTIONS_VERSION,
 	MSG_SCREENSHOT_CREATE,
 	MSG_SCREENSHOT_BROWSE,
-	MSG_HOTKEY_MAIN_MENU,               // currently unused
-	MSG_HOTKEY_TEMPORARY_FAST_FORWARD,  // currently unused
-	MSG_HOTKEY_SOUND_TOGGLE,            // currently unused
-	MSG_PROGRESS_HOTKEY_WAITING_FOR_KEYS, // currently unused
-	MSG_HOTKEY_DELETE_WITH_A,           // currently unused
-	MSG_HOTKEY_CANCEL_WITH_B,           // currently unused
+	MSG_HOTKEY_MAIN_MENU,
+	MSG_HOTKEY_TEMPORARY_FAST_FORWARD,
+	MSG_HOTKEY_SOUND_TOGGLE,
+	MSG_PROGRESS_HOTKEY_WAITING_FOR_KEYS,
+	MSG_HOTKEY_DELETE_WITH_A,
+	MSG_HOTKEY_CANCEL_WITH_B,
 	MSG_LOAD_GAME_RECENTLY_PLAYED,
 	MSG_LOAD_GAME_FROM_CARD,
 	MSG_LOAD_GAME_MENU_TITLE,
@@ -112,9 +121,6 @@ enum MSG
 	MSG_PROGRESS_SCREENSHOT_CREATION_SUCCEEDED,
 	MSG_PROGRESS_SCREENSHOT_CREATION_FAILED,
 
-	MSG_CHANGE_LANGUAGE,
-	MSG_CHANGE_LANGUAGE_WAITING,
-
 	MSG_NO_SLIDE,
 	MSG_PLAYING_SLIDE,
 	MSG_PAUSE_SLIDE,
@@ -139,13 +145,14 @@ enum MSG
 enum LANGUAGE {
 	ENGLISH,
 	CHINESE_SIMPLIFIED,
-	FRENCH
+	FRENCH,
+	GERMAN
 };
 
-extern char* lang[3]; // Allocated in gui.c, needs to match the languages ^
+extern char* lang[4]; // Allocated in gui.c, needs to match the languages ^
 
 char *msg[MSG_END+1];
-char msg_data[16 * 1024];
+char msg_data[32 * 1024];
 
 #endif //__MESSAGE_H__