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- // 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[] = {
- "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;
- }
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