1 // Savestate handling for emulated Sega/Mega CD machine.
2 // (c) Copyright 2007, Grazvydas "notaz" Ignotas
5 #include "../PicoInt.h"
8 #include "../sound/ym2612.h"
11 extern int *sn76496_regs;
13 void (*PicoStateProgressCB)(const char *str) = 0;
44 static char *chunk_names[] = {
45 "Saving.. M68K state",
57 "Saving.. S68K state",
60 "Saving.. PCM_RAM", // 15
62 "Saving.. GATE ARRAY regs",
72 static int write_chunk(chunk_name_e name, int len, void *data, void *file)
75 bwritten += areaWrite(&name, 1, 1, file);
76 bwritten += areaWrite(&len, 1, 4, file);
77 bwritten += areaWrite(data, 1, len, file);
79 return (bwritten == len + 4 + 1);
83 #define CHECKED_WRITE(name,len,data) \
84 if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
85 if (!write_chunk(name, len, data, file)) return 1;
87 #define CHECKED_WRITE_BUFF(name,buff) \
88 if (PicoStateProgressCB) PicoStateProgressCB(chunk_names[name]); \
89 if (!write_chunk(name, sizeof(buff), &buff, file)) return 1;
91 PICO_INTERNAL int PicoCdSaveState(void *file)
93 unsigned char buff[0x60];
94 void *ym2612_regs = YM2612GetRegs();
96 areaWrite("PicoSMCD", 1, 8, file);
97 areaWrite(&PicoVer, 1, 4, file);
99 memset(buff, 0, sizeof(buff));
100 PicoAreaPackCpu(buff, 0);
101 CHECKED_WRITE_BUFF(CHUNK_M68K, buff);
102 CHECKED_WRITE_BUFF(CHUNK_RAM, Pico.ram);
103 CHECKED_WRITE_BUFF(CHUNK_VRAM, Pico.vram);
104 CHECKED_WRITE_BUFF(CHUNK_ZRAM, Pico.zram);
105 CHECKED_WRITE_BUFF(CHUNK_CRAM, Pico.cram);
106 CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram);
107 CHECKED_WRITE_BUFF(CHUNK_MISC, Pico.m);
108 CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video);
110 memset(buff, 0, sizeof(buff));
112 CHECKED_WRITE_BUFF(CHUNK_Z80, buff);
115 CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs);
117 CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs);
121 Pico_mcd->m.audio_offset = mp3_get_offset();
122 memset(buff, 0, sizeof(buff));
123 PicoAreaPackCpu(buff, 1);
124 if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
125 wram_1M_to_2M(Pico_mcd->word_ram2M);
126 Pico_mcd->m.hint_vector = *(unsigned short *)(Pico_mcd->bios + 0x72);
128 CHECKED_WRITE_BUFF(CHUNK_S68K, buff);
129 CHECKED_WRITE_BUFF(CHUNK_PRG_RAM, Pico_mcd->prg_ram);
130 CHECKED_WRITE_BUFF(CHUNK_WORD_RAM, Pico_mcd->word_ram2M); // in 2M format
131 CHECKED_WRITE_BUFF(CHUNK_PCM_RAM, Pico_mcd->pcm_ram);
132 CHECKED_WRITE_BUFF(CHUNK_BRAM, Pico_mcd->bram);
133 CHECKED_WRITE_BUFF(CHUNK_GA_REGS, Pico_mcd->s68k_regs); // GA regs, not CPU regs
134 CHECKED_WRITE_BUFF(CHUNK_PCM, Pico_mcd->pcm);
135 CHECKED_WRITE_BUFF(CHUNK_CDD, Pico_mcd->cdd);
136 CHECKED_WRITE_BUFF(CHUNK_CDC, Pico_mcd->cdc);
137 CHECKED_WRITE_BUFF(CHUNK_SCD, Pico_mcd->scd);
138 CHECKED_WRITE_BUFF(CHUNK_RC, Pico_mcd->rot_comp);
139 CHECKED_WRITE_BUFF(CHUNK_MISC_CD, Pico_mcd->m);
141 if (Pico_mcd->s68k_regs[3]&4) // convert back
142 wram_2M_to_1M(Pico_mcd->word_ram2M);
148 static int g_read_offs = 0;
150 #define R_ERROR_RETURN(error) \
152 printf("PicoCdLoadState @ %x: " error "\n", g_read_offs); \
156 // when is eof really set?
157 #define CHECKED_READ(len,data) \
158 if (areaRead(data, 1, len, file) != len) { \
159 if (len == 1 && areaEof(file)) return 0; \
160 R_ERROR_RETURN("areaRead: premature EOF\n"); \
165 #define CHECKED_READ2(len2,data) \
166 if (len2 != len) R_ERROR_RETURN("unexpected len, wanted " #len2); \
167 CHECKED_READ(len2, data)
169 #define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff);
171 PICO_INTERNAL int PicoCdLoadState(void *file)
173 unsigned char buff[0x60];
175 void *ym2612_regs = YM2612GetRegs();
178 CHECKED_READ(8, buff);
179 if (strncmp((char *)buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
180 CHECKED_READ(4, &ver);
182 while (!areaEof(file))
184 CHECKED_READ(1, buff);
185 CHECKED_READ(4, &len);
186 if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");
187 if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");
192 CHECKED_READ_BUFF(buff);
193 PicoAreaUnpackCpu(buff, 0);
197 CHECKED_READ_BUFF(buff);
201 case CHUNK_RAM: CHECKED_READ_BUFF(Pico.ram); break;
202 case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); break;
203 case CHUNK_ZRAM: CHECKED_READ_BUFF(Pico.zram); break;
204 case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); break;
205 case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); break;
206 case CHUNK_MISC: CHECKED_READ_BUFF(Pico.m); break;
207 case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); break;
208 case CHUNK_PSG: CHECKED_READ2(28*4, sn76496_regs); break;
210 CHECKED_READ2(0x200+4, ym2612_regs);
211 YM2612PicoStateLoad();
216 CHECKED_READ_BUFF(buff);
217 PicoAreaUnpackCpu(buff, 1);
220 case CHUNK_PRG_RAM: CHECKED_READ_BUFF(Pico_mcd->prg_ram); break;
221 case CHUNK_WORD_RAM: CHECKED_READ_BUFF(Pico_mcd->word_ram2M); break;
222 case CHUNK_PCM_RAM: CHECKED_READ_BUFF(Pico_mcd->pcm_ram); break;
223 case CHUNK_BRAM: CHECKED_READ_BUFF(Pico_mcd->bram); break;
224 case CHUNK_GA_REGS: CHECKED_READ_BUFF(Pico_mcd->s68k_regs); break;
225 case CHUNK_PCM: CHECKED_READ_BUFF(Pico_mcd->pcm); break;
226 case CHUNK_CDD: CHECKED_READ_BUFF(Pico_mcd->cdd); break;
227 case CHUNK_CDC: CHECKED_READ_BUFF(Pico_mcd->cdc); break;
228 case CHUNK_SCD: CHECKED_READ_BUFF(Pico_mcd->scd); break;
229 case CHUNK_RC: CHECKED_READ_BUFF(Pico_mcd->rot_comp); break;
230 case CHUNK_MISC_CD: CHECKED_READ_BUFF(Pico_mcd->m); break;
233 printf("PicoCdLoadState: skipping unknown chunk %i of size %i\n", buff[0], len);
234 areaSeek(file, len, SEEK_CUR);
239 /* after load events */
240 if (Pico_mcd->s68k_regs[3]&4) // 1M mode?
241 wram_2M_to_1M(Pico_mcd->word_ram2M);
242 #ifdef _ASM_CD_MEMORY_C
243 PicoMemResetCD(Pico_mcd->s68k_regs[3]);
244 if (Pico_mcd->s68k_regs[3]&4)
245 PicoMemResetCDdecode(Pico_mcd->s68k_regs[3]);
247 if (Pico_mcd->m.audio_track > 0 && Pico_mcd->m.audio_track < Pico_mcd->TOC.Last_Track)
248 mp3_start_play(Pico_mcd->TOC.Tracks[Pico_mcd->m.audio_track].F, Pico_mcd->m.audio_offset);
249 // restore hint vector
250 *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;
256 int PicoCdLoadStateGfx(void *file)
258 int ver, len, found = 0;
262 CHECKED_READ(8, buff);
263 if (strncmp(buff, "PicoSMCD", 8)) R_ERROR_RETURN("bad header");
264 CHECKED_READ(4, &ver);
266 while (!areaEof(file) && found < 4)
268 CHECKED_READ(1, buff);
269 CHECKED_READ(4, &len);
270 if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");
271 if (buff[0] > CHUNK_FM && !(PicoMCD & 1)) R_ERROR_RETURN("cd chunk in non CD state?");
275 case CHUNK_VRAM: CHECKED_READ_BUFF(Pico.vram); found++; break;
276 case CHUNK_CRAM: CHECKED_READ_BUFF(Pico.cram); found++; break;
277 case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); found++; break;
278 case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); found++; break;
280 areaSeek(file, len, SEEK_CUR);