[picodrive.git] / Pico / cd / Area.c

// Savestate handling for emulated Sega/Mega CD machine.
// (c) Copyright 2007, Grazvydas "notaz" Ignotas


#include "../PicoInt.h"

// ym2612
#include "../sound/ym2612.h"

// sn76496
extern int *sn76496_regs;

void (*PicoStateProgressCB)(const char *str) = 0;


typedef enum {
	CHUNK_M68K = 1,
	CHUNK_RAM,
	CHUNK_VRAM,
	CHUNK_ZRAM,
	CHUNK_CRAM,	// 5
	CHUNK_VSRAM,
	CHUNK_MISC,
	CHUNK_VIDEO,
	CHUNK_Z80,
	CHUNK_PSG,	// 10
	CHUNK_FM,
	// CD stuff
	CHUNK_S68K,
	CHUNK_PRG_RAM,
	CHUNK_WORD_RAM,
	CHUNK_PCM_RAM,	// 15
	CHUNK_BRAM,
	CHUNK_GA_REGS,
	CHUNK_PCM,
	CHUNK_CDC,
	CHUNK_CDD,	// 20
	CHUNK_SCD,
	CHUNK_RC,
	CHUNK_MISC_CD,
} chunk_name_e;


static char *chunk_names[] = {
	"INVALID!",
	"Saving.. M68K state",
	"Saving.. RAM",
	"Saving.. VRAM",
	"Saving.. ZRAM",
	"Saving.. CRAM",	// 5
	"Saving.. VSRAM",
	"Saving.. emu state",
	"Saving.. VIDEO",
	"Saving.. Z80 state",
	"Saving.. PSG",		// 10
	"Saving.. FM",
	// CD stuff
	"Saving.. S68K state",
	"Saving.. PRG_RAM",
	"Saving.. WORD_RAM",
	"Saving.. PCM_RAM",	// 15
	"Saving.. BRAM",
	"Saving.. GATE ARRAY regs",
	"Saving.. PCM state",
	"Saving.. CDC",
	"Saving.. CDD",		// 20
	"Saving.. SCD",
	"Saving.. GFX chip",
	"Saving.. MCD state",
};


static int write_chunk(chunk_name_e name, int len, void *data, void *file)
{
	size_t bwritten = 0;
	bwritten += areaWrite(&name, 1, 1, file);
	bwritten += areaWrite(&len, 1, 4, file);
	bwritten += areaWrite(data, 1, len, file);

	return (bwritten == len + 4 + 1);
}


#define CHECKED_WRITE(name,len,data) \
	if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
	if (!write_chunk(name, len, data, file)) return 1;

#define CHECKED_WRITE_BUFF(name,buff) \
	if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
	if (!write_chunk(name, sizeof(buff), &buff, file)) return 1;

PICO_INTERNAL int PicoCdSaveState(void *file)
{
	unsigned char buff[0x60];
	void *ym2612_regs = YM2612GetRegs();

	areaWrite("PicoSMCD", 1, 8, file);
	areaWrite(&PicoVer, 1, 4, file);

	memset(buff, 0, sizeof(buff));
	PicoAreaPackCpu(buff, 0);
	CHECKED_WRITE_BUFF(CHUNK_M68K,  buff);
	CHECKED_WRITE_BUFF(CHUNK_RAM,   Pico.ram);
	CHECKED_WRITE_BUFF(CHUNK_VRAM,  Pico.vram);
	CHECKED_WRITE_BUFF(CHUNK_ZRAM,  Pico.zram);
	CHECKED_WRITE_BUFF(CHUNK_CRAM,  Pico.cram);
	CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram);
	CHECKED_WRITE_BUFF(CHUNK_MISC,  Pico.m);
	CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video);
	if(PicoOpt&7) {
		memset(buff, 0, sizeof(buff));
		z80_pack(buff);
		CHECKED_WRITE_BUFF(CHUNK_Z80, buff);
	}
	if(PicoOpt&3)
		CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs);
	if(PicoOpt&1)
		CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs);

	if (PicoMCD & 1)
	{
		Pico_mcd->m.audio_offset = mp3_get_offset();
		memset(buff, 0, sizeof(buff));
		PicoAreaPackCpu(buff, 1);
		if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
			wram_1M_to_2M(Pico_mcd->word_ram2M);
        	Pico_mcd->m.hint_vector = *(unsigned short *)(Pico_mcd->bios + 0x72);

		CHECKED_WRITE_BUFF(CHUNK_S68K,     buff);
		CHECKED_WRITE_BUFF(CHUNK_PRG_RAM,  Pico_mcd->prg_ram);
		CHECKED_WRITE_BUFF(CHUNK_WORD_RAM, Pico_mcd->word_ram2M); // in 2M format
		CHECKED_WRITE_BUFF(CHUNK_PCM_RAM,  Pico_mcd->pcm_ram);
		CHECKED_WRITE_BUFF(CHUNK_BRAM,     Pico_mcd->bram);
		CHECKED_WRITE_BUFF(CHUNK_GA_REGS,  Pico_mcd->s68k_regs); // GA regs, not CPU regs
		CHECKED_WRITE_BUFF(CHUNK_PCM,      Pico_mcd->pcm);
		CHECKED_WRITE_BUFF(CHUNK_CDD,      Pico_mcd->cdd);
		CHECKED_WRITE_BUFF(CHUNK_CDC,      Pico_mcd->cdc);
		CHECKED_WRITE_BUFF(CHUNK_SCD,      Pico_mcd->scd);
		CHECKED_WRITE_BUFF(CHUNK_RC,       Pico_mcd->rot_comp);
		CHECKED_WRITE_BUFF(CHUNK_MISC_CD,  Pico_mcd->m);

		if (Pico_mcd->s68k_regs[3]&4) // convert back
			wram_2M_to_1M(Pico_mcd->word_ram2M);
	}

	return 0;
}

static int g_read_offs = 0;

#define R_ERROR_RETURN(error) \
{ \
	printf("PicoCdLoadState @ %x: " error "\n", g_read_offs); \
	return 1; \
}

// when is eof really set?
#define CHECKED_READ(len,data) \
	if (areaRead(data, 1, len, file) != len) { \
		if (len == 1 && areaEof(file)) return 0; \
		R_ERROR_RETURN("areaRead: premature EOF\n"); \
		return 1; \
	} \
	g_read_offs += len;

#define CHECKED_READ2(len2,data) \
	if (len2 != len) R_ERROR_RETURN("unexpected len, wanted " #len2); \
	CHECKED_READ(len2, data)

#define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff);

PICO_INTERNAL int PicoCdLoadState(void *file)
{
	unsigned char buff[0x60];
	int ver, len;
	void *ym2612_regs = YM2612GetRegs();

	g_read_offs = 0;
	CHECKED_READ(8, buff);
	if (strncmp((char *)buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
	CHECKED_READ(4, &ver);

	while (!areaEof(file))
	{
		CHECKED_READ(1, buff);
		CHECKED_READ(4, &len);
		if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");
		if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");

		switch (buff[0])
		{
			case CHUNK_M68K:
				CHECKED_READ_BUFF(buff);
				PicoAreaUnpackCpu(buff, 0);
				break;

			case CHUNK_Z80:
				CHECKED_READ_BUFF(buff);
				z80_unpack(buff);
				break;

			case CHUNK_RAM:   CHECKED_READ_BUFF(Pico.ram); break;
			case CHUNK_VRAM:  CHECKED_READ_BUFF(Pico.vram); break;
			case CHUNK_ZRAM:  CHECKED_READ_BUFF(Pico.zram); break;
			case CHUNK_CRAM:  CHECKED_READ_BUFF(Pico.cram); break;
			case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); break;
			case CHUNK_MISC:  CHECKED_READ_BUFF(Pico.m); break;
			case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); break;
			case CHUNK_PSG:   CHECKED_READ2(28*4, sn76496_regs); break;
			case CHUNK_FM:
				CHECKED_READ2(0x200+4, ym2612_regs);
				YM2612PicoStateLoad();
				break;

			// cd stuff
			case CHUNK_S68K:
				CHECKED_READ_BUFF(buff);
				PicoAreaUnpackCpu(buff, 1);
				break;

			case CHUNK_PRG_RAM:	CHECKED_READ_BUFF(Pico_mcd->prg_ram); break;
			case CHUNK_WORD_RAM:	CHECKED_READ_BUFF(Pico_mcd->word_ram2M); break;
			case CHUNK_PCM_RAM:	CHECKED_READ_BUFF(Pico_mcd->pcm_ram); break;
			case CHUNK_BRAM:	CHECKED_READ_BUFF(Pico_mcd->bram); break;
			case CHUNK_GA_REGS:	CHECKED_READ_BUFF(Pico_mcd->s68k_regs); break;
			case CHUNK_PCM:		CHECKED_READ_BUFF(Pico_mcd->pcm); break;
			case CHUNK_CDD:		CHECKED_READ_BUFF(Pico_mcd->cdd); break;
			case CHUNK_CDC:		CHECKED_READ_BUFF(Pico_mcd->cdc); break;
			case CHUNK_SCD:		CHECKED_READ_BUFF(Pico_mcd->scd); break;
			case CHUNK_RC:		CHECKED_READ_BUFF(Pico_mcd->rot_comp); break;
			case CHUNK_MISC_CD:	CHECKED_READ_BUFF(Pico_mcd->m); break;

			default:
				printf("PicoCdLoadState: skipping unknown chunk %i of size %i\n", buff[0], len);
				areaSeek(file, len, SEEK_CUR);
				break;
		}
	}

	/* after load events */
	if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
		wram_2M_to_1M(Pico_mcd->word_ram2M);
#ifdef _ASM_CD_MEMORY_C
	PicoMemResetCD(Pico_mcd->s68k_regs[3]);
	if (Pico_mcd->s68k_regs[3]&4)
		PicoMemResetCDdecode(Pico_mcd->s68k_regs[3]);
#endif
	if (Pico_mcd->m.audio_track > 0 && Pico_mcd->m.audio_track < Pico_mcd->TOC.Last_Track)
		mp3_start_play(Pico_mcd->TOC.Tracks[Pico_mcd->m.audio_track].F, Pico_mcd->m.audio_offset);
	// restore hint vector
        *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;

	return 0;
}


int PicoCdLoadStateGfx(void *file)
{
	int ver, len, found = 0;
	char buff[8];

	g_read_offs = 0;
	CHECKED_READ(8, buff);
	if (strncmp(buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
	CHECKED_READ(4, &ver);

	while (!areaEof(file) && found < 4)
	{
		CHECKED_READ(1, buff);
		CHECKED_READ(4, &len);
		if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");
		if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");

		switch (buff[0])
		{
			case CHUNK_VRAM:  CHECKED_READ_BUFF(Pico.vram);  found++; break;
			case CHUNK_CRAM:  CHECKED_READ_BUFF(Pico.cram);  found++; break;
			case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); found++; break;
			case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); found++; break;
			default:
				areaSeek(file, len, SEEK_CUR);
				break;
		}
	}

	return 0;
}
Commit	Line	Data
6cadc2da	1	// Savestate handling for emulated Sega/Mega CD machine.
6cadc2da	2	// (c) Copyright 2007, Grazvydas "notaz" Ignotas
51a902ae	3
	4
	5	#include "../PicoInt.h"
	6
	7	// ym2612
	8	#include "../sound/ym2612.h"
	9
	10	// sn76496
	11	extern int *sn76496_regs;
	12
76276b0b	13	void (PicoStateProgressCB)(const char str) = 0;
76276b0b	14
51a902ae	15
	16	typedef enum {
	17	CHUNK_M68K = 1,
	18	CHUNK_RAM,
	19	CHUNK_VRAM,
	20	CHUNK_ZRAM,
75736070	21	CHUNK_CRAM, // 5
51a902ae	22	CHUNK_VSRAM,
	23	CHUNK_MISC,
	24	CHUNK_VIDEO,
	25	CHUNK_Z80,
75736070	26	CHUNK_PSG, // 10
51a902ae	27	CHUNK_FM,
51a902ae	28	// CD stuff
75736070	29	CHUNK_S68K,
	30	CHUNK_PRG_RAM,
	31	CHUNK_WORD_RAM,
4f265db7	32	CHUNK_PCM_RAM, // 15
4f265db7	33	CHUNK_BRAM,
75736070	34	CHUNK_GA_REGS,
4f265db7	35	CHUNK_PCM,
75736070	36	CHUNK_CDC,
4f265db7	37	CHUNK_CDD, // 20
75736070	38	CHUNK_SCD,
4f265db7	39	CHUNK_RC,
75736070	40	CHUNK_MISC_CD,
51a902ae	41	} chunk_name_e;
	42
	43
76276b0b	44	static char *chunk_names[] = {
da42200b	45	"INVALID!",
76276b0b	46	"Saving.. M68K state",
	47	"Saving.. RAM",
	48	"Saving.. VRAM",
	49	"Saving.. ZRAM",
	50	"Saving.. CRAM", // 5
	51	"Saving.. VSRAM",
	52	"Saving.. emu state",
	53	"Saving.. VIDEO",
	54	"Saving.. Z80 state",
	55	"Saving.. PSG", // 10
	56	"Saving.. FM",
	57	// CD stuff
	58	"Saving.. S68K state",
	59	"Saving.. PRG_RAM",
	60	"Saving.. WORD_RAM",
	61	"Saving.. PCM_RAM", // 15
	62	"Saving.. BRAM",
	63	"Saving.. GATE ARRAY regs",
	64	"Saving.. PCM state",
	65	"Saving.. CDC",
	66	"Saving.. CDD", // 20
	67	"Saving.. SCD",
	68	"Saving.. GFX chip",
	69	"Saving.. MCD state",
	70	};
	71
	72
51a902ae	73	static int write_chunk(chunk_name_e name, int len, void data, void file)
	74	{
	75	size_t bwritten = 0;
	76	bwritten += areaWrite(&name, 1, 1, file);
	77	bwritten += areaWrite(&len, 1, 4, file);
	78	bwritten += areaWrite(data, 1, len, file);
	79
	80	return (bwritten == len + 4 + 1);
	81	}
	82
	83
	84	#define CHECKED_WRITE(name,len,data) \
76276b0b	85	if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
51a902ae	86	if (!write_chunk(name, len, data, file)) return 1;
	87
	88	#define CHECKED_WRITE_BUFF(name,buff) \
76276b0b	89	if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
51a902ae	90	if (!write_chunk(name, sizeof(buff), &buff, file)) return 1;
51a902ae	91
eff55556	92	PICO_INTERNAL int PicoCdSaveState(void *file)
51a902ae	93	{
	94	unsigned char buff[0x60];
	95	void *ym2612_regs = YM2612GetRegs();
	96
	97	areaWrite("PicoSMCD", 1, 8, file);
	98	areaWrite(&PicoVer, 1, 4, file);
	99
	100	memset(buff, 0, sizeof(buff));
	101	PicoAreaPackCpu(buff, 0);
	102	CHECKED_WRITE_BUFF(CHUNK_M68K, buff);
	103	CHECKED_WRITE_BUFF(CHUNK_RAM, Pico.ram);
	104	CHECKED_WRITE_BUFF(CHUNK_VRAM, Pico.vram);
	105	CHECKED_WRITE_BUFF(CHUNK_ZRAM, Pico.zram);
	106	CHECKED_WRITE_BUFF(CHUNK_CRAM, Pico.cram);
	107	CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram);
	108	CHECKED_WRITE_BUFF(CHUNK_MISC, Pico.m);
	109	CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video);
	110	if(PicoOpt&7) {
	111	memset(buff, 0, sizeof(buff));
	112	z80_pack(buff);
	113	CHECKED_WRITE_BUFF(CHUNK_Z80, buff);
	114	}
	115	if(PicoOpt&3)
	116	CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs);
	117	if(PicoOpt&1)
	118	CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs);
	119
75736070	120	if (PicoMCD & 1)
	121	{
	122	Pico_mcd->m.audio_offset = mp3_get_offset();
	123	memset(buff, 0, sizeof(buff));
	124	PicoAreaPackCpu(buff, 1);
fa1e5e29	125	if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
	126	wram_1M_to_2M(Pico_mcd->word_ram2M);
	127	Pico_mcd->m.hint_vector = (unsigned short )(Pico_mcd->bios + 0x72);
75736070	128
	129	CHECKED_WRITE_BUFF(CHUNK_S68K, buff);
	130	CHECKED_WRITE_BUFF(CHUNK_PRG_RAM, Pico_mcd->prg_ram);
fa1e5e29	131	CHECKED_WRITE_BUFF(CHUNK_WORD_RAM, Pico_mcd->word_ram2M); // in 2M format
4f265db7	132	CHECKED_WRITE_BUFF(CHUNK_PCM_RAM, Pico_mcd->pcm_ram);
75736070	133	CHECKED_WRITE_BUFF(CHUNK_BRAM, Pico_mcd->bram);
4f265db7	134	CHECKED_WRITE_BUFF(CHUNK_GA_REGS, Pico_mcd->s68k_regs); // GA regs, not CPU regs
4f265db7	135	CHECKED_WRITE_BUFF(CHUNK_PCM, Pico_mcd->pcm);
75736070	136	CHECKED_WRITE_BUFF(CHUNK_CDD, Pico_mcd->cdd);
	137	CHECKED_WRITE_BUFF(CHUNK_CDC, Pico_mcd->cdc);
	138	CHECKED_WRITE_BUFF(CHUNK_SCD, Pico_mcd->scd);
	139	CHECKED_WRITE_BUFF(CHUNK_RC, Pico_mcd->rot_comp);
	140	CHECKED_WRITE_BUFF(CHUNK_MISC_CD, Pico_mcd->m);
fa1e5e29	141
	142	if (Pico_mcd->s68k_regs[3]&4) // convert back
	143	wram_2M_to_1M(Pico_mcd->word_ram2M);
75736070	144	}
51a902ae	145
	146	return 0;
	147	}
	148
	149	static int g_read_offs = 0;
	150
51a902ae	151	#define R_ERROR_RETURN(error) \
	152	{ \
	153	printf("PicoCdLoadState @ %x: " error "\n", g_read_offs); \
	154	return 1; \
	155	}
	156
75736070	157	// when is eof really set?
	158	#define CHECKED_READ(len,data) \
	159	if (areaRead(data, 1, len, file) != len) { \
	160	if (len == 1 && areaEof(file)) return 0; \
	161	R_ERROR_RETURN("areaRead: premature EOF\n"); \
	162	return 1; \
	163	} \
	164	g_read_offs += len;
	165
51a902ae	166	#define CHECKED_READ2(len2,data) \
	167	if (len2 != len) R_ERROR_RETURN("unexpected len, wanted " #len2); \
	168	CHECKED_READ(len2, data)
	169
	170	#define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff);
	171
eff55556	172	PICO_INTERNAL int PicoCdLoadState(void *file)
51a902ae	173	{
	174	unsigned char buff[0x60];
	175	int ver, len;
	176	void *ym2612_regs = YM2612GetRegs();
	177
	178	g_read_offs = 0;
	179	CHECKED_READ(8, buff);
	180	if (strncmp((char *)buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
	181	CHECKED_READ(4, &ver);
	182
	183	while (!areaEof(file))
	184	{
	185	CHECKED_READ(1, buff);
	186	CHECKED_READ(4, &len);
75736070	187	if (len < 0 \|\| len > 1024*512) R_ERROR_RETURN("bad length");
4f265db7	188	if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");
51a902ae	189
	190	switch (buff[0])
	191	{
	192	case CHUNK_M68K:
	193	CHECKED_READ_BUFF(buff);
	194	PicoAreaUnpackCpu(buff, 0);
	195	break;
	196
	197	case CHUNK_Z80:
	198	CHECKED_READ_BUFF(buff);
	199	z80_unpack(buff);
	200	break;
	201
	202	case CHUNK_RAM: CHECKED_READ_BUFF(Pico.ram); break;
	203	case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); break;
	204	case CHUNK_ZRAM: CHECKED_READ_BUFF(Pico.zram); break;
	205	case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); break;
	206	case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); break;
	207	case CHUNK_MISC: CHECKED_READ_BUFF(Pico.m); break;
	208	case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); break;
	209	case CHUNK_PSG: CHECKED_READ2(28*4, sn76496_regs); break;
	210	case CHUNK_FM:
	211	CHECKED_READ2(0x200+4, ym2612_regs);
	212	YM2612PicoStateLoad();
	213	break;
75736070	214
	215	// cd stuff
	216	case CHUNK_S68K:
	217	CHECKED_READ_BUFF(buff);
	218	PicoAreaUnpackCpu(buff, 1);
	219	break;
	220
	221	case CHUNK_PRG_RAM: CHECKED_READ_BUFF(Pico_mcd->prg_ram); break;
fa1e5e29	222	case CHUNK_WORD_RAM: CHECKED_READ_BUFF(Pico_mcd->word_ram2M); break;
4f265db7	223	case CHUNK_PCM_RAM: CHECKED_READ_BUFF(Pico_mcd->pcm_ram); break;
75736070	224	case CHUNK_BRAM: CHECKED_READ_BUFF(Pico_mcd->bram); break;
75736070	225	case CHUNK_GA_REGS: CHECKED_READ_BUFF(Pico_mcd->s68k_regs); break;
4f265db7	226	case CHUNK_PCM: CHECKED_READ_BUFF(Pico_mcd->pcm); break;
75736070	227	case CHUNK_CDD: CHECKED_READ_BUFF(Pico_mcd->cdd); break;
	228	case CHUNK_CDC: CHECKED_READ_BUFF(Pico_mcd->cdc); break;
	229	case CHUNK_SCD: CHECKED_READ_BUFF(Pico_mcd->scd); break;
	230	case CHUNK_RC: CHECKED_READ_BUFF(Pico_mcd->rot_comp); break;
fa1e5e29	231	case CHUNK_MISC_CD: CHECKED_READ_BUFF(Pico_mcd->m); break;
75736070	232
75736070	233	default:
fa1e5e29	234	printf("PicoCdLoadState: skipping unknown chunk %i of size %i\n", buff[0], len);
75736070	235	areaSeek(file, len, SEEK_CUR);
75736070	236	break;
51a902ae	237	}
	238	}
	239
fa1e5e29	240	/* after load events */
	241	if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
	242	wram_2M_to_1M(Pico_mcd->word_ram2M);
4ff2d527	243	#ifdef _ASM_CD_MEMORY_C
4ff2d527	244	PicoMemResetCD(Pico_mcd->s68k_regs[3]);
00bd648e	245	if (Pico_mcd->s68k_regs[3]&4)
00bd648e	246	PicoMemResetCDdecode(Pico_mcd->s68k_regs[3]);
4ff2d527	247	#endif
83bd0b76	248	if (Pico_mcd->m.audio_track > 0 && Pico_mcd->m.audio_track < Pico_mcd->TOC.Last_Track)
83bd0b76	249	mp3_start_play(Pico_mcd->TOC.Tracks[Pico_mcd->m.audio_track].F, Pico_mcd->m.audio_offset);
fa1e5e29	250	// restore hint vector
	251	(unsigned short )(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;
	252
51a902ae	253	return 0;
	254	}
	255
860c6322	256
	257	int PicoCdLoadStateGfx(void *file)
	258	{
	259	int ver, len, found = 0;
	260	char buff[8];
	261
	262	g_read_offs = 0;
	263	CHECKED_READ(8, buff);
	264	if (strncmp(buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
	265	CHECKED_READ(4, &ver);
	266
	267	while (!areaEof(file) && found < 4)
	268	{
	269	CHECKED_READ(1, buff);
	270	CHECKED_READ(4, &len);
	271	if (len < 0 \|\| len > 1024*512) R_ERROR_RETURN("bad length");
	272	if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");
	273
	274	switch (buff[0])
	275	{
	276	case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); found++; break;
	277	case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); found++; break;
	278	case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); found++; break;
	279	case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); found++; break;
	280	default:
	281	areaSeek(file, len, SEEK_CUR);
	282	break;
	283	}
	284	}
	285
	286	return 0;
	287	}
	288
	289