+++ /dev/null
-// Savestate handling for emulated Sega/Mega CD machine.
-// (c) Copyright 2007, Grazvydas "notaz" Ignotas
-
-
-#include "../pico_int.h"
-
-// ym2612
-#include "../sound/ym2612.h"
-
-// sn76496
-extern int *sn76496_regs;
-
-carthw_state_chunk *carthw_chunks;
-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_DEFAULT_COUNT
- // CHUNK_CARTHW = 64, // defined in PicoInt
-} 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 && name < CHUNK_DEFAULT_COUNT) \
- PicoStateProgressCB(chunk_names[name]); \
- if (!write_chunk(name, len, data, file)) return 1; \
-}
-
-#define CHECKED_WRITE_BUFF(name,buff) { \
- if (PicoStateProgressCB && name < CHUNK_DEFAULT_COUNT) \
- 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("PicoSEXT", 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) {
- ym2612_pack_state();
- CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs);
- }
-
- if (PicoAHW & PAHW_MCD)
- {
- 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);
- }
-
- if (carthw_chunks != NULL)
- {
- carthw_state_chunk *chwc;
- if (PicoStateProgressCB)
- PicoStateProgressCB("Saving.. cart hw state");
- for (chwc = carthw_chunks; chwc->ptr != NULL; chwc++)
- CHECKED_WRITE(chwc->chunk, chwc->size, chwc->ptr);
- }
-
- return 0;
-}
-
-static int g_read_offs = 0;
-
-#define R_ERROR_RETURN(error) \
-{ \
- elprintf(EL_STATUS, "PicoCdLoadState @ %x: " error, 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)) goto readend; \
- R_ERROR_RETURN("areaRead: premature EOF\n"); \
- return 1; \
- } \
- g_read_offs += len;
-
-#define CHECKED_READ2(len2,data) \
- if (len2 != len) { \
- elprintf(EL_STATUS, "unexpected len %i, wanted %i (%s)", len, len2, #len2); \
- if (len > len2) R_ERROR_RETURN("failed."); \
- /* else read anyway and hope for the best.. */ \
- } \
- CHECKED_READ(len, data)
-
-#define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff);
-
-PICO_INTERNAL int PicoCdLoadState(void *file)
-{
- unsigned char buff[0x60], buff_m68k[0x60], buff_s68k[0x60];
- int ver, len;
- void *ym2612_regs = YM2612GetRegs();
-
- g_read_offs = 0;
- CHECKED_READ(8, buff);
- if (strncmp((char *)buff, "PicoSMCD", 8) && strncmp((char *)buff, "PicoSEXT", 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 && buff[0] <= CHUNK_MISC_CD && !(PicoAHW & PAHW_MCD))
- R_ERROR_RETURN("cd chunk in non CD state?");
-
- switch (buff[0])
- {
- case CHUNK_M68K:
- CHECKED_READ_BUFF(buff_m68k);
- 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);
- ym2612_unpack_state();
- break;
-
- // cd stuff
- case CHUNK_S68K:
- CHECKED_READ_BUFF(buff_s68k);
- 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:
- if (carthw_chunks != NULL)
- {
- carthw_state_chunk *chwc;
- for (chwc = carthw_chunks; chwc->ptr != NULL; chwc++) {
- if (chwc->chunk == buff[0]) {
- CHECKED_READ2(chwc->size, chwc->ptr);
- goto breakswitch;
- }
- }
- }
- elprintf(EL_STATUS, "PicoCdLoadState: skipping unknown chunk %i of size %i", buff[0], len);
- areaSeek(file, len, SEEK_CUR);
- break;
- }
- breakswitch:;
- }
-
-readend:
- if (PicoAHW & PAHW_MCD)
- {
- /* after load events */
- if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
- wram_2M_to_1M(Pico_mcd->word_ram2M);
- PicoMemResetCD(Pico_mcd->s68k_regs[3]);
-#ifdef _ASM_CD_MEMORY_C
- if (Pico_mcd->s68k_regs[3]&4)
- PicoMemResetCDdecode(Pico_mcd->s68k_regs[3]);
-#endif
- if (!(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))
- cdda_start_play();
- // restore hint vector
- *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;
-
- // must unpack after other CD stuff is loaded
- PicoAreaUnpackCpu(buff_s68k, 1);
- }
- PicoAreaUnpackCpu(buff_m68k, 0);
-
- return 0;
-}
-
-
-int PicoCdLoadStateGfx(void *file)
-{
- int ver, len, found = 0;
- char buff[8];
-
- g_read_offs = 0;
- CHECKED_READ(8, buff);
- if (strncmp((char *)buff, "PicoSMCD", 8) && strncmp((char *)buff, "PicoSEXT", 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 && buff[0] <= CHUNK_MISC_CD && !(PicoAHW & PAHW_MCD))
- 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;
- }
- }
-
-readend:
- return 0;
-}
-
-
notaz.gp2x.de / picodrive.git / blobdiff