mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 07:17:45 -04:00
290 lines
7.7 KiB
C
290 lines
7.7 KiB
C
// This is part of Pico Library
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// (c) Copyright 2007 notaz, All rights reserved.
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// Free for non-commercial use.
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// For commercial use, separate licencing terms must be obtained.
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#include "../PicoInt.h"
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// ym2612
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#include "../sound/ym2612.h"
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// sn76496
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extern int *sn76496_regs;
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void (*PicoStateProgressCB)(const char *str) = 0;
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typedef enum {
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CHUNK_M68K = 1,
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CHUNK_RAM,
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CHUNK_VRAM,
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CHUNK_ZRAM,
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CHUNK_CRAM, // 5
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CHUNK_VSRAM,
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CHUNK_MISC,
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CHUNK_VIDEO,
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CHUNK_Z80,
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CHUNK_PSG, // 10
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CHUNK_FM,
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// CD stuff
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CHUNK_S68K,
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CHUNK_PRG_RAM,
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CHUNK_WORD_RAM,
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CHUNK_PCM_RAM, // 15
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CHUNK_BRAM,
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CHUNK_GA_REGS,
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CHUNK_PCM,
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CHUNK_CDC,
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CHUNK_CDD, // 20
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CHUNK_SCD,
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CHUNK_RC,
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CHUNK_MISC_CD,
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} chunk_name_e;
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static char *chunk_names[] = {
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"Saving.. M68K state",
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"Saving.. RAM",
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"Saving.. VRAM",
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"Saving.. ZRAM",
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"Saving.. CRAM", // 5
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"Saving.. VSRAM",
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"Saving.. emu state",
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"Saving.. VIDEO",
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"Saving.. Z80 state",
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"Saving.. PSG", // 10
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"Saving.. FM",
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// CD stuff
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"Saving.. S68K state",
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"Saving.. PRG_RAM",
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"Saving.. WORD_RAM",
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"Saving.. PCM_RAM", // 15
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"Saving.. BRAM",
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"Saving.. GATE ARRAY regs",
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"Saving.. PCM state",
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"Saving.. CDC",
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"Saving.. CDD", // 20
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"Saving.. SCD",
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"Saving.. GFX chip",
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"Saving.. MCD state",
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};
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static int write_chunk(chunk_name_e name, int len, void *data, void *file)
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{
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size_t bwritten = 0;
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bwritten += areaWrite(&name, 1, 1, file);
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bwritten += areaWrite(&len, 1, 4, file);
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bwritten += areaWrite(data, 1, len, file);
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return (bwritten == len + 4 + 1);
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}
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#define CHECKED_WRITE(name,len,data) \
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if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
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if (!write_chunk(name, len, data, file)) return 1;
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#define CHECKED_WRITE_BUFF(name,buff) \
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if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
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if (!write_chunk(name, sizeof(buff), &buff, file)) return 1;
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int PicoCdSaveState(void *file)
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{
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unsigned char buff[0x60];
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void *ym2612_regs = YM2612GetRegs();
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areaWrite("PicoSMCD", 1, 8, file);
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areaWrite(&PicoVer, 1, 4, file);
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memset(buff, 0, sizeof(buff));
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PicoAreaPackCpu(buff, 0);
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CHECKED_WRITE_BUFF(CHUNK_M68K, buff);
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CHECKED_WRITE_BUFF(CHUNK_RAM, Pico.ram);
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CHECKED_WRITE_BUFF(CHUNK_VRAM, Pico.vram);
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CHECKED_WRITE_BUFF(CHUNK_ZRAM, Pico.zram);
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CHECKED_WRITE_BUFF(CHUNK_CRAM, Pico.cram);
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CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram);
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CHECKED_WRITE_BUFF(CHUNK_MISC, Pico.m);
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CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video);
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if(PicoOpt&7) {
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memset(buff, 0, sizeof(buff));
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z80_pack(buff);
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CHECKED_WRITE_BUFF(CHUNK_Z80, buff);
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}
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if(PicoOpt&3)
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CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs);
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if(PicoOpt&1)
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CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs);
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if (PicoMCD & 1)
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{
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Pico_mcd->m.audio_offset = mp3_get_offset();
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memset(buff, 0, sizeof(buff));
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PicoAreaPackCpu(buff, 1);
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if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
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wram_1M_to_2M(Pico_mcd->word_ram2M);
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Pico_mcd->m.hint_vector = *(unsigned short *)(Pico_mcd->bios + 0x72);
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CHECKED_WRITE_BUFF(CHUNK_S68K, buff);
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CHECKED_WRITE_BUFF(CHUNK_PRG_RAM, Pico_mcd->prg_ram);
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CHECKED_WRITE_BUFF(CHUNK_WORD_RAM, Pico_mcd->word_ram2M); // in 2M format
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CHECKED_WRITE_BUFF(CHUNK_PCM_RAM, Pico_mcd->pcm_ram);
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CHECKED_WRITE_BUFF(CHUNK_BRAM, Pico_mcd->bram);
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CHECKED_WRITE_BUFF(CHUNK_GA_REGS, Pico_mcd->s68k_regs); // GA regs, not CPU regs
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CHECKED_WRITE_BUFF(CHUNK_PCM, Pico_mcd->pcm);
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CHECKED_WRITE_BUFF(CHUNK_CDD, Pico_mcd->cdd);
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CHECKED_WRITE_BUFF(CHUNK_CDC, Pico_mcd->cdc);
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CHECKED_WRITE_BUFF(CHUNK_SCD, Pico_mcd->scd);
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CHECKED_WRITE_BUFF(CHUNK_RC, Pico_mcd->rot_comp);
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CHECKED_WRITE_BUFF(CHUNK_MISC_CD, Pico_mcd->m);
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if (Pico_mcd->s68k_regs[3]&4) // convert back
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wram_2M_to_1M(Pico_mcd->word_ram2M);
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}
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return 0;
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}
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static int g_read_offs = 0;
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#define R_ERROR_RETURN(error) \
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{ \
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printf("PicoCdLoadState @ %x: " error "\n", g_read_offs); \
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return 1; \
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}
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// when is eof really set?
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#define CHECKED_READ(len,data) \
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if (areaRead(data, 1, len, file) != len) { \
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if (len == 1 && areaEof(file)) return 0; \
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R_ERROR_RETURN("areaRead: premature EOF\n"); \
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return 1; \
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} \
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g_read_offs += len;
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#define CHECKED_READ2(len2,data) \
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if (len2 != len) R_ERROR_RETURN("unexpected len, wanted " #len2); \
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CHECKED_READ(len2, data)
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#define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff);
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int PicoCdLoadState(void *file)
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{
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unsigned char buff[0x60];
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int ver, len;
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void *ym2612_regs = YM2612GetRegs();
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g_read_offs = 0;
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CHECKED_READ(8, buff);
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if (strncmp((char *)buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
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CHECKED_READ(4, &ver);
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while (!areaEof(file))
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{
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CHECKED_READ(1, buff);
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CHECKED_READ(4, &len);
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if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");
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if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");
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switch (buff[0])
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{
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case CHUNK_M68K:
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CHECKED_READ_BUFF(buff);
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PicoAreaUnpackCpu(buff, 0);
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break;
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case CHUNK_Z80:
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CHECKED_READ_BUFF(buff);
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z80_unpack(buff);
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break;
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case CHUNK_RAM: CHECKED_READ_BUFF(Pico.ram); break;
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case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); break;
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case CHUNK_ZRAM: CHECKED_READ_BUFF(Pico.zram); break;
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case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); break;
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case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); break;
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case CHUNK_MISC: CHECKED_READ_BUFF(Pico.m); break;
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case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); break;
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case CHUNK_PSG: CHECKED_READ2(28*4, sn76496_regs); break;
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case CHUNK_FM:
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CHECKED_READ2(0x200+4, ym2612_regs);
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YM2612PicoStateLoad();
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break;
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// cd stuff
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case CHUNK_S68K:
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CHECKED_READ_BUFF(buff);
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PicoAreaUnpackCpu(buff, 1);
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break;
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case CHUNK_PRG_RAM: CHECKED_READ_BUFF(Pico_mcd->prg_ram); break;
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case CHUNK_WORD_RAM: CHECKED_READ_BUFF(Pico_mcd->word_ram2M); break;
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case CHUNK_PCM_RAM: CHECKED_READ_BUFF(Pico_mcd->pcm_ram); break;
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case CHUNK_BRAM: CHECKED_READ_BUFF(Pico_mcd->bram); break;
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case CHUNK_GA_REGS: CHECKED_READ_BUFF(Pico_mcd->s68k_regs); break;
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case CHUNK_PCM: CHECKED_READ_BUFF(Pico_mcd->pcm); break;
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case CHUNK_CDD: CHECKED_READ_BUFF(Pico_mcd->cdd); break;
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case CHUNK_CDC: CHECKED_READ_BUFF(Pico_mcd->cdc); break;
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case CHUNK_SCD: CHECKED_READ_BUFF(Pico_mcd->scd); break;
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case CHUNK_RC: CHECKED_READ_BUFF(Pico_mcd->rot_comp); break;
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case CHUNK_MISC_CD: CHECKED_READ_BUFF(Pico_mcd->m); break;
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default:
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printf("PicoCdLoadState: skipping unknown chunk %i of size %i\n", buff[0], len);
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areaSeek(file, len, SEEK_CUR);
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break;
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}
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}
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/* after load events */
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if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
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wram_2M_to_1M(Pico_mcd->word_ram2M);
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#ifdef _ASM_CD_MEMORY_C
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PicoMemResetCD(Pico_mcd->s68k_regs[3]);
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#endif
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if (Pico_mcd->m.audio_track > 0 && Pico_mcd->m.audio_track < Pico_mcd->TOC.Last_Track)
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mp3_start_play(Pico_mcd->TOC.Tracks[Pico_mcd->m.audio_track].F, Pico_mcd->m.audio_offset);
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// restore hint vector
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*(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;
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return 0;
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}
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int PicoCdLoadStateGfx(void *file)
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{
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int ver, len, found = 0;
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char buff[8];
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g_read_offs = 0;
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CHECKED_READ(8, buff);
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if (strncmp(buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
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CHECKED_READ(4, &ver);
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while (!areaEof(file) && found < 4)
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{
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CHECKED_READ(1, buff);
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CHECKED_READ(4, &len);
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if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");
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if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");
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switch (buff[0])
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{
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case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); found++; break;
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case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); found++; break;
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case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); found++; break;
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case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); found++; break;
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default:
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areaSeek(file, len, SEEK_CUR);
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break;
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}
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}
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return 0;
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}
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