X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=platform%2Fgp2x%2Femu.c;h=24496fd458f08b59d8957b587d9186b5798dfe9c;hb=fa1e5e2948e9b06dec3353081081173f7ae4d742;hp=6e0021b1cb541aa96e43fd638f5947c9e8c0e850;hpb=8c1952f0d742014666df8ec2191458d9117625b5;p=picodrive.git

diff --git a/platform/gp2x/emu.c b/platform/gp2x/emu.c
index 6e0021b..24496fd 100644
--- a/platform/gp2x/emu.c
+++ b/platform/gp2x/emu.c
@@ -48,6 +48,7 @@ unsigned char *rom_data = NULL;
 
 extern int crashed_940;
 
+static short sndBuffer[2*44100/50];
 static char noticeMsg[64];					// notice msg to draw
 static struct timeval noticeMsgTime = { 0, 0 };	// when started showing
 static int reset_timing, osd_fps_x;
@@ -79,14 +80,15 @@ static void strlwr(char* string)
 	while ( (*string++ = (char)tolower(*string)) );
 }
 
-static int try_rfn_ext(char *ext)
+static int try_rfn_cut(void)
 {
 	FILE *tmp;
 	char *p;
 
-	p = romFileName + strlen(romFileName) - 4;
-	if (p < romFileName) p = romFileName;
-	strcpy(p, ext);
+	p = romFileName + strlen(romFileName) - 1;
+	for (; p > romFileName; p--)
+		if (*p == '.') break;
+	*p = 0;
 
 	if((tmp = fopen(romFileName, "rb"))) {
 		fclose(tmp);
@@ -95,29 +97,131 @@ static int try_rfn_ext(char *ext)
 	return 0;
 }
 
-static void get_ext(char *ext)
+static void get_ext(char *file, char *ext)
 {
 	char *p;
 
-	p = romFileName + strlen(romFileName) - 4;
-	if (p < romFileName) p = romFileName;
+	p = file + strlen(file) - 4;
+	if (p < file) p = file;
 	strncpy(ext, p, 4);
 	ext[4] = 0;
 	strlwr(ext);
 }
 
+char *biosfiles_us[] = { "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210" };
+char *biosfiles_eu[] = { "eu_mcd2_9306", "eu_mcd2_9303",   "eu_mcd1_9210" };
+char *biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" };
+
+extern char **g_argv;
+
+int find_bios(int region, char **bios_file)
+{
+	static char bios_path[1024];
+	int i, j, count;
+	char **files;
+	FILE *f = NULL;
+
+	if (region == 4) { // US
+		files = biosfiles_us;
+		count = sizeof(biosfiles_us) / sizeof(char *);
+	} else if (region == 8) { // EU
+		files = biosfiles_eu;
+		count = sizeof(biosfiles_eu) / sizeof(char *);
+	} else if (region == 1 || region == 2) {
+		files = biosfiles_jp;
+		count = sizeof(biosfiles_jp) / sizeof(char *);
+	} else {
+		return 0;
+	}
+
+	for (i = 0; i < count; i++)
+	{
+		strncpy(bios_path, g_argv[0], 1023);
+		bios_path[1024-32] = 0;
+		for (j = strlen(bios_path); j > 0; j--)
+			if (bios_path[j] == '/') { bios_path[j+1] = 0; break; }
+		strcat(bios_path, files[i]);
+		strcat(bios_path, ".bin");
+		f = fopen(bios_path, "rb");
+		if (f) break;
+
+		bios_path[strlen(bios_path) - 4] = 0;
+		strcat(bios_path, ".zip");
+		f = fopen(bios_path, "rb");
+		if (f) break;
+	}
+
+	if (f) {
+		printf("using bios: %s\n", bios_path);
+		fclose(f);
+		if (bios_file) *bios_file = bios_path;
+		return 1;
+	} else {
+		sprintf(menuErrorMsg, "no %s BIOS files found, read docs",
+			region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");
+		printf("%s\n", menuErrorMsg);
+		return 0;
+	}
+}
+
+/* checks if romFileName points to valid MegaCD image
+ * if so, checks for suitable BIOS */
+static int cd_check(char *ext, char **bios_file)
+{
+	unsigned char buf[32];
+	FILE *cd_f;
+	int type = 0, region = 4; // 1: Japan, 4: US, 8: Europe
+
+	cd_f = fopen(romFileName, "rb");
+	if (!cd_f) return 0; // let the upper level handle this
+
+	if (fread(buf, 1, 32, cd_f) != 32) {
+		fclose(cd_f);
+		return 0;
+	}
+
+	if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x00, 14)) type = 1;       // Sega CD (ISO)
+	if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x10, 14)) type = 2;       // Sega CD (BIN)
+	if (type == 0) {
+		fclose(cd_f);
+		return 0;
+	}
+
+	/* it seems we have a CD image here. Try to detect region and load a suitable BIOS now.. */
+	fseek(cd_f, (type == 1) ? 0x100+0x10B : 0x110+0x10B, SEEK_SET);
+	fread(buf, 1, 1, cd_f);
+	fclose(cd_f);
+
+	if (buf[0] == 0x64) region = 8; // EU
+	if (buf[0] == 0xa1) region = 1; // JAP
+
+	printf("detected %s Sega/Mega CD image with %s region\n",
+		type == 2 ? "BIN" : "ISO", region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");
+
+	if (PicoRegionOverride) {
+		region = PicoRegionOverride;
+		printf("overrided region to %s\n", region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");
+	}
+
+	if(find_bios(region, bios_file))
+		 return type;	// CD and BIOS detected
+
+	return -1;     		// CD detected but load failed
+}
+
 int emu_ReloadRom(void)
 {
 	unsigned int rom_size = 0;
+	char *used_rom_name = romFileName;
 	char ext[5];
 	FILE *rom;
-	int ret;
+	int ret, cd_state;
 
 	printf("emu_ReloadRom(%s)\n", romFileName);
 
-	// detect wrong extensions
-	get_ext(ext);
+	get_ext(romFileName, ext);
 
+	// detect wrong extensions
 	if(!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) { // s.gz ~ .mds.gz
 		sprintf(menuErrorMsg, "Not a ROM selected.");
 		return 0;
@@ -156,16 +260,28 @@ int emu_ReloadRom(void)
 			sprintf(menuErrorMsg, "Invalid GMV file.");
 			return 0;
 		}
-		dummy = try_rfn_ext(".zip") || try_rfn_ext(".bin") ||
-			try_rfn_ext(".smd") || try_rfn_ext(".gen");
+		dummy = try_rfn_cut() || try_rfn_cut();
 		if (!dummy) {
 			sprintf(menuErrorMsg, "Could't find a ROM for movie.");
 			return 0;
 		}
-		get_ext(ext);
+		get_ext(romFileName, ext);
 	}
 
-	rom = fopen(romFileName, "rb");
+	// check for MegaCD image
+	cd_state = cd_check(ext, &used_rom_name);
+	if (cd_state > 0) {
+		PicoMCD |= 1;
+		get_ext(used_rom_name, ext);
+	} else if (cd_state == -1) {
+		// bios_help() ?
+		return 0;
+	} else {
+		if (PicoMCD & 1) PicoExitMCD();
+		PicoMCD &= ~1;
+	}
+
+	rom = fopen(used_rom_name, "rb");
 	if(!rom) {
 		sprintf(menuErrorMsg, "Failed to open rom.");
 		return 0;
@@ -180,9 +296,9 @@ int emu_ReloadRom(void)
 	// zipfile support
 	if(!strcasecmp(ext, ".zip")) {
 		fclose(rom);
-		ret = CartLoadZip(romFileName, &rom_data, &rom_size);
+		ret = CartLoadZip(used_rom_name, &rom_data, &rom_size);
 		if(ret) {
-			if (ret == 4) strcpy(menuErrorMsg, "No ROMs in zip found.");
+			if (ret == 4) strcpy(menuErrorMsg, "No ROMs found in zip.");
 			else sprintf(menuErrorMsg, "Unzip failed with code %i", ret);
 			printf("%s\n", menuErrorMsg);
 			return 0;
@@ -206,16 +322,28 @@ int emu_ReloadRom(void)
 		return 0;
 	}
 
+	// load config for this ROM (do this before insert to get correct region)
+	ret = emu_ReadConfig(1);
+	if (!ret)
+		emu_ReadConfig(0);
+
 	printf("PicoCartInsert(%p, %d);\n", rom_data, rom_size);
 	if(PicoCartInsert(rom_data, rom_size)) {
 		sprintf(menuErrorMsg, "Failed to load ROM.");
 		return 0;
 	}
 
-	// load config for this ROM
-	ret = emu_ReadConfig(1);
-	if (!ret)
-		emu_ReadConfig(0);
+	Pico.m.frame_count = 0;
+
+	// insert CD if it was detected
+	if (cd_state > 0) {
+		ret = Insert_CD(romFileName, cd_state == 2);
+		if (ret != 0) {
+			sprintf(menuErrorMsg, "Insert_CD() failed, invalid CD image?");
+			printf("%s\n", menuErrorMsg);
+			return 0;
+		}
+	}
 
 	// emu_ReadConfig() might have messed currentConfig.lastRomFile
 	strncpy(currentConfig.lastRomFile, romFileName, sizeof(currentConfig.lastRomFile)-1);
@@ -253,8 +381,6 @@ int emu_ReloadRom(void)
 	if(currentConfig.EmuOpt & 1)
 		emu_SaveLoadGame(1, 1);
 
-	Pico.m.frame_count = 0;
-
 	return 1;
 }
 
@@ -328,10 +454,11 @@ int emu_ReadConfig(int game)
 		// set default config
 		memset(&currentConfig, 0, sizeof(currentConfig));
 		currentConfig.lastRomFile[0] = 0;
-		currentConfig.EmuOpt  = 0x1f;
-		currentConfig.PicoOpt = 0x0f;
-		currentConfig.PsndRate = 22050;
+		currentConfig.EmuOpt  = 0x1f | 0x400; // | cd_leds
+		currentConfig.PicoOpt = 0x0f | 0xe00; // | use_940 | cd_pcm | cd_cdda
+		currentConfig.PsndRate = 22050; // 44100;
 		currentConfig.PicoRegion = 0; // auto
+		currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 		currentConfig.Frameskip = -1; // auto
 		currentConfig.CPUclock = 200;
 		currentConfig.volume = 50;
@@ -366,6 +493,7 @@ int emu_ReadConfig(int game)
 	PicoOpt = currentConfig.PicoOpt;
 	PsndRate = currentConfig.PsndRate;
 	PicoRegionOverride = currentConfig.PicoRegion;
+	PicoAutoRgnOrder = currentConfig.PicoAutoRgnOrder;
 	if (PicoOpt & 0x20) {
 		actionNames[ 8] = "Z"; actionNames[ 9] = "Y";
 		actionNames[10] = "X"; actionNames[11] = "MODE";
@@ -403,6 +531,7 @@ int emu_WriteConfig(int game)
 		currentConfig.PicoOpt = PicoOpt;
 		currentConfig.PsndRate = PsndRate;
 		currentConfig.PicoRegion = PicoRegionOverride;
+		currentConfig.PicoAutoRgnOrder = PicoAutoRgnOrder;
 		bwrite = fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 		fflush(f);
 		fclose(f);
@@ -435,24 +564,19 @@ void emu_Deinit(void)
 }
 
 
-void osd_text(int x, int y, char *text)
+void osd_text(int x, int y, const char *text)
 {
 	int len = strlen(text)*8;
 
 	if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
-		int *p, i, h, black, white;
-		if (PicoOpt&0x10) {
-			black = 0x40404040; white = 0x41;
-		} else {
-			black = 0xe0e0e0e0; white = 0xf0;
-		}
+		int *p, i, h;
 		x &= ~3; // align x
 		len = (len+3) >> 2;
 		for (h = 0; h < 8; h++) {
 			p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));
-			for (i = len; i; i--, p++) *p = black;
+			for (i = len; i; i--, p++) *p = 0xe0e0e0e0;
 		}
-		gp2x_text_out8_2(x, y, text, white);
+		gp2x_text_out8_2(x, y, text, 0xf0);
 	} else {
 		int *p, i, h;
 		x &= ~1; // align x
@@ -465,6 +589,35 @@ void osd_text(int x, int y, char *text)
 	}
 }
 
+static void cd_leds(void)
+{
+	// mmu problems?
+//	static
+	int old_reg;
+//	if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
+	old_reg = Pico_mcd->s68k_regs[0];
+
+	if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
+		// 8-bit modes
+		unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;
+		unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;
+		*(unsigned int *)((char *)gp2x_screen + 320*2+ 4) =
+		*(unsigned int *)((char *)gp2x_screen + 320*3+ 4) =
+		*(unsigned int *)((char *)gp2x_screen + 320*4+ 4) = col_g;
+		*(unsigned int *)((char *)gp2x_screen + 320*2+12) =
+		*(unsigned int *)((char *)gp2x_screen + 320*3+12) =
+		*(unsigned int *)((char *)gp2x_screen + 320*4+12) = col_r;
+	} else {
+		// 16-bit modes
+		unsigned int *p = (unsigned int *)((short *)gp2x_screen + 320*2+4);
+		unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;
+		unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;
+		*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;
+		*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;
+		*p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;
+	}
+}
+
 static int EmuScan16(unsigned int num, void *sdata)
 {
 	if (!(Pico.video.reg[1]&8)) num += 8;
@@ -481,11 +634,13 @@ static int EmuScan8(unsigned int num, void *sdata)
 	return 0;
 }
 
-static int localPal[0x100];
+int localPal[0x100];
 static void (*vidCpyM2)(void *dest, void *src) = NULL;
 
-static void blit(char *fps, char *notice)
+static void blit(const char *fps, const char *notice)
 {
+	int emu_opt = currentConfig.EmuOpt;
+
 	if (PicoOpt&0x10) {
 		// 8bit fast renderer
 		if (Pico.m.dirtyPal) {
@@ -495,7 +650,7 @@ static void blit(char *fps, char *notice)
 			gp2x_video_setpalette(localPal, 0x40);
 		}
 		vidCpyM2((unsigned char *)gp2x_screen+320*8, framebuff+328*8);
-	} else if (!(currentConfig.EmuOpt&0x80)) {
+	} else if (!(emu_opt&0x80)) {
 		// 8bit accurate renderer
 		if (Pico.m.dirtyPal) {
 			Pico.m.dirtyPal = 0;
@@ -504,6 +659,8 @@ static void blit(char *fps, char *notice)
 				vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 				vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);
 				blockcpy(localPal+0xc0, localPal+0x40, 0x40*4);
+				localPal[0xc0] = 0x0000c000;
+				localPal[0xd0] = 0x00c00000;
 				localPal[0xe0] = 0x00000000; // reserved pixels for OSD
 				localPal[0xf0] = 0x00ffffff;
 				gp2x_video_setpalette(localPal, 0x100);
@@ -520,8 +677,10 @@ static void blit(char *fps, char *notice)
 	}
 
 	if (notice) osd_text(4, 232, notice);
-	if (currentConfig.EmuOpt & 2)
+	if (emu_opt & 2)
 		osd_text(osd_fps_x, 232, fps);
+	if ((emu_opt & 0x400) && (PicoMCD & 1))
+		cd_leds();
 
 	//gp2x_video_wait_vsync();
 	gp2x_video_flip();
@@ -543,18 +702,14 @@ static void blit(char *fps, char *notice)
 // clears whole screen or just the notice area (in all buffers)
 static void clearArea(int full)
 {
-	if (PicoOpt&0x10) {
-		// 8bit fast renderer
-		if (full) gp2x_memset_all_buffers(0, 0x40, 320*240);
-		else      gp2x_memset_all_buffers(320*232, 0x40, 320*8);
-	} else if (currentConfig.EmuOpt&0x80) {
+	if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
+		// 8-bit renderers
+		if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);
+		else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);
+	} else {
 		// 16bit accurate renderer
 		if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);
 		else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);
-	} else {
-		// 8bit accurate renderer
-		if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);
-		else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);
 	}
 }
 
@@ -562,27 +717,27 @@ static void clearArea(int full)
 static void vidResetMode(void)
 {
 	if (PicoOpt&0x10) {
-		localPal[0x40] = 0;
-		localPal[0x41] = 0x00ffffff;
 		gp2x_video_changemode(8);
-		gp2x_video_setpalette(localPal, 0x42);
-		gp2x_memset_all_buffers(0, 0x40, 320*240);
-		gp2x_video_flip();
 	} else if (currentConfig.EmuOpt&0x80) {
 		gp2x_video_changemode(15);
 		PicoDrawSetColorFormat(1);
 		PicoScan = EmuScan16;
 		PicoScan(0, 0);
 	} else {
+		gp2x_video_changemode(8);
+		PicoDrawSetColorFormat(2);
+		PicoScan = EmuScan8;
+		PicoScan(0, 0);
+	}
+	if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
+		// setup pal for 8-bit modes
+		localPal[0xc0] = 0x0000c000; // MCD LEDs
+		localPal[0xd0] = 0x00c00000;
 		localPal[0xe0] = 0x00000000; // reserved pixels for OSD
 		localPal[0xf0] = 0x00ffffff;
-		gp2x_video_changemode(8);
 		gp2x_video_setpalette(localPal, 0x100);
 		gp2x_memset_all_buffers(0, 0xe0, 320*240);
 		gp2x_video_flip();
-		PicoDrawSetColorFormat(2);
-		PicoScan = EmuScan8;
-		PicoScan(0, 0);
 	}
 	Pico.m.dirtyPal = 1;
 	// reset scaling
@@ -609,6 +764,12 @@ static int check_save_file(void)
 	return 0;
 }
 
+static void emu_state_cb(const char *str)
+{
+	clearArea(0);
+	blit("", str);
+}
+
 static void RunEvents(unsigned int which)
 {
 	if(which & 0x1800) { // save or load (but not both)
@@ -622,10 +783,11 @@ static void RunEvents(unsigned int which)
 			clearArea(0);
 		}
 		if (do_it) {
-			blit("", (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
-			if(movie_data) {
-			}
-			emu_SaveLoadGame(which & 0x1000, 0);
+			osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
+			PicoStateProgressCB = emu_state_cb;
+			gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);
+			emu_SaveLoadGame((which & 0x1000) >> 12, 0);
+			PicoStateProgressCB = NULL;
 		}
 
 		reset_timing = 1;
@@ -775,24 +937,10 @@ static void updateKeys(void)
 	prevEvents = (allActions[0] | allActions[1]) >> 16;
 }
 
-static int snd_excess_add = 0, snd_excess_cnt = 0; // hack
 
-static void updateSound(void)
+static void updateSound(int len)
 {
-	int len = (PicoOpt&8)?PsndLen*2:PsndLen;
-
-	snd_excess_cnt += snd_excess_add;
-	if (snd_excess_cnt >= 0x10000) {
-		snd_excess_cnt -= 0x10000;
-		if (PicoOpt&8) {
-			PsndOut[len]   = PsndOut[len-2];
-			PsndOut[len+1] = PsndOut[len-1];
-			len+=2;
-		} else {
-			PsndOut[len]   = PsndOut[len-1];
-			len++;
-		}
-	}
+	if (PicoOpt&8) len<<=1;
 
 	gp2x_sound_write(PsndOut, len<<1);
 }
@@ -862,6 +1010,7 @@ void emu_Loop(void)
 
 	// make sure we are in correct mode
 	vidResetMode();
+	Pico.m.dirtyPal = 1;
 	oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 	find_combos();
 
@@ -872,22 +1021,23 @@ void emu_Loop(void)
 
 	// prepare sound stuff
 	if(currentConfig.EmuOpt & 4) {
+		int snd_excess_add;
 		if(PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old || crashed_940) {
 			/* if 940 is turned off, we need it to be put back to sleep */
 			if (!(PicoOpt&0x200) && ((PicoOpt^PicoOpt_old)&0x200)) {
-				Reset940(1);
+				Reset940(1, 2);
 				Pause940(1);
 			}
-			sound_rerate();
+			sound_rerate(1);
 		}
 		//excess_samples = PsndRate - PsndLen*target_fps;
-		snd_excess_cnt = 0;
 		snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 		printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n", PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);
 		gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);
 		gp2x_sound_volume(currentConfig.volume, currentConfig.volume);
 		PicoWriteSound = updateSound;
-		PsndOut = calloc((PicoOpt&8) ? (PsndLen*4+4) : (PsndLen*2+2), 1);
+		memset(sndBuffer, 0, sizeof(sndBuffer));
+		PsndOut = sndBuffer;
 		PsndRate_old = PsndRate;
 		PsndLen_real = PsndLen;
 		PicoOpt_old  = PicoOpt;
@@ -1083,14 +1233,23 @@ if (Pico.m.frame_count == 31563) {
 
 	// save SRAM
 	if((currentConfig.EmuOpt & 1) && SRam.changed) {
+		osd_text(4, 232, "Writing SRAM/BRAM..");
 		emu_SaveLoadGame(0, 1);
 		SRam.changed = 0;
 	}
 
-	if (PsndOut != 0) {
-		free(PsndOut);
-		PsndOut = 0;
+	// if in 16bit mode, generate 8it image for menu background
+	if (!(PicoOpt&0x10) && (currentConfig.EmuOpt&0x80)) {
+		PicoOpt |= 0x10;
+		PicoFrameFull();
+		vidCpyM2((unsigned char *)gp2x_screen+320*8, framebuff+328*8);
+		vidConvCpyRGB32(localPal, Pico.cram, 0x40);
+		gp2x_video_setpalette(localPal, 0x40);
+		PicoOpt &= ~0x10;
 	}
+
+	// for menu bg
+	gp2x_memcpy_all_buffers(gp2x_screen, 0, 320*240*2);
 }
 
 
@@ -1112,7 +1271,6 @@ size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)
 	return gzwrite(file, p, _n);
 }
 
-typedef unsigned int (*STATE_SL_FUNC)(void *, unsigned int, unsigned int, void *);
 
 int emu_SaveLoadGame(int load, int sram)
 {
@@ -1121,7 +1279,7 @@ int emu_SaveLoadGame(int load, int sram)
 
 	// make save filename
 	romfname_ext(saveFname, "");
-	if(sram) strcat(saveFname, ".srm");
+	if(sram) strcat(saveFname, (PicoMCD&1) ? ".brm" : ".srm");
 	else {
 		if(state_slot > 0 && state_slot < 10) sprintf(saveFname, "%s.%i", saveFname, state_slot);
 		strcat(saveFname, ".mds");
@@ -1131,30 +1289,41 @@ int emu_SaveLoadGame(int load, int sram)
 
 	if(sram) {
 		FILE *sramFile;
-		int sram_size = SRam.end-SRam.start+1;
-		if(SRam.reg_back & 4) sram_size=0x2000;
-		if(!SRam.data) return 0; // SRam forcefully disabled for this game
+		int sram_size;
+		unsigned char *sram_data;
+		if (PicoMCD&1) {
+			sram_size = 0x2000;
+			sram_data = Pico_mcd->bram;
+		} else {
+			sram_size = SRam.end-SRam.start+1;
+			if(SRam.reg_back & 4) sram_size=0x2000;
+			sram_data = SRam.data;
+		}
+		if(!sram_data) return 0; // SRam forcefully disabled for this game
+
 		if(load) {
 			sramFile = fopen(saveFname, "rb");
 			if(!sramFile) return -1;
-			fread(SRam.data, 1, sram_size, sramFile);
+			fread(sram_data, 1, sram_size, sramFile);
 			fclose(sramFile);
 		} else {
 			// sram save needs some special processing
 			// see if we have anything to save
 			for(; sram_size > 0; sram_size--)
-				if(SRam.data[sram_size-1]) break;
+				if(sram_data[sram_size-1]) break;
 
 			if(sram_size) {
 				sramFile = fopen(saveFname, "wb");
-				ret = fwrite(SRam.data, 1, sram_size, sramFile);
+				ret = fwrite(sram_data, 1, sram_size, sramFile);
 				ret = (ret != sram_size) ? -1 : 0;
 				fclose(sramFile);
 				sync();
 			}
 		}
 		return ret;
-	} else {
+	}
+	else
+	{
 		void *PmovFile = NULL;
 		// try gzip first
 		if(currentConfig.EmuOpt & 8) {
@@ -1162,26 +1331,34 @@ int emu_SaveLoadGame(int load, int sram)
 			if( (PmovFile = gzopen(saveFname, load ? "rb" : "wb")) ) {
 				areaRead  = gzRead2;
 				areaWrite = gzWrite2;
+				areaEof   = (areaeof *) gzeof;
+				areaSeek  = (areaseek *) gzseek;
 				if(!load) gzsetparams(PmovFile, 9, Z_DEFAULT_STRATEGY);
 			} else
 				saveFname[strlen(saveFname)-3] = 0;
 		}
 		if(!PmovFile) { // gzip failed or was disabled
 			if( (PmovFile = fopen(saveFname, load ? "rb" : "wb")) ) {
-				areaRead  = (STATE_SL_FUNC) fread;
-				areaWrite = (STATE_SL_FUNC) fwrite;
+				areaRead  = (arearw *) fread;
+				areaWrite = (arearw *) fwrite;
+				areaEof   = (areaeof *) feof;
+				areaSeek  = (areaseek *) fseek;
 			}
 		}
 		if(PmovFile) {
-			PmovState(load ? 6 : 5, PmovFile);
-			strcpy(noticeMsg, load ? "GAME LOADED  " : "GAME SAVED   ");
+			ret = PmovState(load ? 6 : 5, PmovFile);
 			if(areaRead == gzRead2)
 				 gzclose(PmovFile);
 			else fclose ((FILE *) PmovFile);
 			PmovFile = 0;
 			if (!load) sync();
 			else Pico.m.dirtyPal=1;
-		} else {
+		}
+		else	ret = -1;
+		if (!ret)
+			strcpy(noticeMsg, load ? "GAME LOADED  " : "GAME SAVED   ");
+		else
+		{
 			strcpy(noticeMsg, load ? "LOAD FAILED  " : "SAVE FAILED  ");
 			ret = -1;
 		}