pico/state.c

   1 // (c) Copyright 2004 Dave, All rights reserved.\r
   2 // (c) Copyright 2006-2010 notaz, All rights reserved.\r
   3 // Free for non-commercial use.\r
   4 \r
   5 // For commercial use, separate licencing terms must be obtained.\r
   6 \r
   7 \r
   8 #include "pico_int.h"\r
   9 #include <zlib/zlib.h>\r
  10 \r
  11 #include "../cpu/sh2/sh2.h"\r
  12 #include "sound/ym2612.h"\r
  13 \r
  14 // sn76496\r
  15 extern int *sn76496_regs;\r
  16 \r
  17 typedef size_t (arearw)(void *p, size_t _size, size_t _n, void *file);\r
  18 typedef size_t (areaeof)(void *file);\r
  19 typedef int    (areaseek)(void *file, long offset, int whence);\r
  20 typedef int    (areaclose)(void *file);\r
  21 \r
  22 static arearw    *areaRead;\r
  23 static arearw    *areaWrite;\r
  24 static areaeof   *areaEof;\r
  25 static areaseek  *areaSeek;\r
  26 static areaclose *areaClose;\r
  27 \r
  28 carthw_state_chunk *carthw_chunks;\r
  29 void (*PicoStateProgressCB)(const char *str);\r
  30 void (*PicoLoadStateHook)(void);\r
  31 \r
  32 \r
  33 /* I/O functions */\r
  34 static size_t gzRead2(void *p, size_t _size, size_t _n, void *file)\r
  35 {\r
  36   return gzread(file, p, _size * _n);\r
  37 }\r
  38 \r
  39 static size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)\r
  40 {\r
  41   return gzwrite(file, p, _size * _n);\r
  42 }\r
  43 \r
  44 static void set_cbs(int gz)\r
  45 {\r
  46   if (gz) {\r
  47     areaRead  = gzRead2;\r
  48     areaWrite = gzWrite2;\r
  49     areaEof   = (areaeof *) gzeof;\r
  50     areaSeek  = (areaseek *) gzseek;\r
  51     areaClose = (areaclose *) gzclose;\r
  52   } else {\r
  53     areaRead  = (arearw *) fread;\r
  54     areaWrite = (arearw *) fwrite;\r
  55     areaEof   = (areaeof *) feof;\r
  56     areaSeek  = (areaseek *) fseek;\r
  57     areaClose = (areaclose *) fclose;\r
  58   }\r
  59 }\r
  60 \r
  61 static void *open_save_file(const char *fname, int is_save)\r
  62 {\r
  63   int len = strlen(fname);\r
  64   void *afile = NULL;\r
  65 \r
  66   if (len > 3 && strcmp(fname + len - 3, ".gz") == 0)\r
  67   {\r
  68     if ( (afile = gzopen(fname, is_save ? "wb" : "rb")) ) {\r
  69       set_cbs(1);\r
  70       if (is_save)\r
  71         gzsetparams(afile, 9, Z_DEFAULT_STRATEGY);\r
  72     }\r
  73   }\r
  74   else\r
  75   {\r
  76     if ( (afile = fopen(fname, is_save ? "wb" : "rb")) ) {\r
  77       set_cbs(0);\r
  78     }\r
  79   }\r
  80 \r
  81   return afile;\r
  82 }\r
  83 \r
  84 // legacy savestate loading\r
  85 #define SCANP(f, x) areaRead(&Pico.x, sizeof(Pico.x), 1, f)\r
  86 \r
  87 static int state_load_legacy(void *file)\r
  88 {\r
  89   unsigned char head[32];\r
  90   unsigned char cpu[0x60];\r
  91   unsigned char cpu_z80[Z80_STATE_SIZE];\r
  92   void *ym2612_regs;\r
  93   int ok;\r
  94 \r
  95   memset(&cpu,0,sizeof(cpu));\r
  96   memset(&cpu_z80,0,sizeof(cpu_z80));\r
  97 \r
  98   memset(head, 0, sizeof(head));\r
  99   areaRead(head, sizeof(head), 1, file);\r
 100   if (strcmp((char *)head, "Pico") != 0)\r
 101     return -1;\r
 102 \r
 103   elprintf(EL_STATUS, "legacy savestate");\r
 104 \r
 105   // Scan all the memory areas:\r
 106   SCANP(file, ram);\r
 107   SCANP(file, vram);\r
 108   SCANP(file, zram);\r
 109   SCANP(file, cram);\r
 110   SCANP(file, vsram);\r
 111 \r
 112   // Pack, scan and unpack the cpu data:\r
 113   areaRead(cpu, sizeof(cpu), 1, file);\r
 114   SekUnpackCpu(cpu, 0);\r
 115 \r
 116   SCANP(file, m);\r
 117   SCANP(file, video);\r
 118 \r
 119   ok = areaRead(cpu_z80, sizeof(cpu_z80), 1, file) == sizeof(cpu_z80);\r
 120   // do not unpack if we fail to load z80 state\r
 121   if (!ok) z80_reset();\r
 122   else     z80_unpack(cpu_z80);\r
 123 \r
 124   ym2612_regs = YM2612GetRegs();\r
 125   areaRead(sn76496_regs, 28*4, 1, file);\r
 126   areaRead(ym2612_regs, 0x200+4, 1, file);\r
 127   ym2612_unpack_state();\r
 128 \r
 129   return 0;\r
 130 }\r
 131 \r
 132 // ---------------------------------------------------------------------------\r
 133 \r
 134 typedef enum {\r
 135   CHUNK_M68K = 1,\r
 136   CHUNK_RAM,\r
 137   CHUNK_VRAM,\r
 138   CHUNK_ZRAM,\r
 139   CHUNK_CRAM,    // 5\r
 140   CHUNK_VSRAM,\r
 141   CHUNK_MISC,\r
 142   CHUNK_VIDEO,\r
 143   CHUNK_Z80,\r
 144   CHUNK_PSG,     // 10\r
 145   CHUNK_FM,\r
 146   // CD stuff\r
 147   CHUNK_S68K,\r
 148   CHUNK_PRG_RAM,\r
 149   CHUNK_WORD_RAM,\r
 150   CHUNK_PCM_RAM, // 15\r
 151   CHUNK_BRAM,\r
 152   CHUNK_GA_REGS,\r
 153   CHUNK_PCM,\r
 154   CHUNK_CDC,\r
 155   CHUNK_CDD,     // 20\r
 156   CHUNK_SCD,\r
 157   CHUNK_RC,\r
 158   CHUNK_MISC_CD,\r
 159   //\r
 160   CHUNK_IOPORTS, // versions < 1.70 did not save that..\r
 161   CHUNK_SMS,     // 25\r
 162   // 32x\r
 163   CHUNK_MSH2,\r
 164   CHUNK_MSH2_DATA,\r
 165   CHUNK_MSH2_PERI,\r
 166   CHUNK_SSH2,\r
 167   CHUNK_SSH2_DATA, // 30\r
 168   CHUNK_SSH2_PERI,\r
 169   CHUNK_32XSYS,\r
 170   CHUNK_M68K_BIOS,\r
 171   CHUNK_MSH2_BIOS,\r
 172   CHUNK_SSH2_BIOS, // 35\r
 173   CHUNK_SDRAM,\r
 174   CHUNK_DRAM,\r
 175   CHUNK_32XPAL,\r
 176   //\r
 177   CHUNK_DEFAULT_COUNT,\r
 178   CHUNK_CARTHW_ = CHUNK_CARTHW,  // defined in PicoInt\r
 179 } chunk_name_e;\r
 180 \r
 181 static const char * const chunk_names[] = {\r
 182   "INVALID!",\r
 183   "M68K state",\r
 184   "RAM",\r
 185   "VRAM",\r
 186   "ZRAM",\r
 187   "CRAM",      // 5\r
 188   "VSRAM",\r
 189   "emu state",\r
 190   "VIDEO",\r
 191   "Z80 state",\r
 192   "PSG",       // 10\r
 193   "FM",\r
 194   // CD stuff\r
 195   "S68K state",\r
 196   "PRG_RAM",\r
 197   "WORD_RAM",\r
 198   "PCM_RAM",   // 15\r
 199   "BRAM",\r
 200   "GATE ARRAY regs",\r
 201   "PCM state",\r
 202   "CDC",\r
 203   "CDD",       // 20\r
 204   "SCD",\r
 205   "GFX chip",\r
 206   "MCD state",\r
 207   //\r
 208   "IO",\r
 209   "SMS state", // 25\r
 210   // 32x\r
 211   "MSH2",\r
 212   "MSH2 data",\r
 213   "MSH2 peri",\r
 214   "SSH2",\r
 215   "SSH2 data", // 30\r
 216   "SSH2 peri",\r
 217   "32X system regs",\r
 218   "M68K BIOS",\r
 219   "MSH2 BIOS",\r
 220   "SSH2 BIOS", // 35\r
 221   "SDRAM",\r
 222   "DRAM",\r
 223   "PAL",\r
 224 };\r
 225 \r
 226 static int write_chunk(chunk_name_e name, int len, void *data, void *file)\r
 227 {\r
 228   size_t bwritten = 0;\r
 229   bwritten += areaWrite(&name, 1, 1, file);\r
 230   bwritten += areaWrite(&len, 1, 4, file);\r
 231   bwritten += areaWrite(data, 1, len, file);\r
 232 \r
 233   return (bwritten == len + 4 + 1);\r
 234 }\r
 235 \r
 236 #define CHECKED_WRITE(name,len,data) { \\r
 237   if (PicoStateProgressCB && name < CHUNK_DEFAULT_COUNT) { \\r
 238     strncpy(sbuff + 9, chunk_names[name], sizeof(sbuff) - 9); \\r
 239     PicoStateProgressCB(sbuff); \\r
 240   } \\r
 241   if (!write_chunk(name, len, data, file)) return 1; \\r
 242 }\r
 243 \r
 244 #define CHECKED_WRITE_BUFF(name,buff) { \\r
 245   if (PicoStateProgressCB && name < CHUNK_DEFAULT_COUNT) { \\r
 246     strncpy(sbuff + 9, chunk_names[name], sizeof(sbuff) - 9); \\r
 247     PicoStateProgressCB(sbuff); \\r
 248   } \\r
 249   if (!write_chunk(name, sizeof(buff), &buff, file)) return 1; \\r
 250 }\r
 251 \r
 252 static int state_save(void *file)\r
 253 {\r
 254   char sbuff[32] = "Saving.. ";\r
 255   unsigned char buff[0x60], buff_z80[Z80_STATE_SIZE];\r
 256   void *ym2612_regs = YM2612GetRegs();\r
 257   int ver = 0x0170; // not really used..\r
 258 \r
 259   areaWrite("PicoSEXT", 1, 8, file);\r
 260   areaWrite(&ver, 1, 4, file);\r
 261 \r
 262   if (!(PicoAHW & PAHW_SMS)) {\r
 263     memset(buff, 0, sizeof(buff));\r
 264     SekPackCpu(buff, 0);\r
 265     CHECKED_WRITE_BUFF(CHUNK_M68K,  buff);\r
 266     CHECKED_WRITE_BUFF(CHUNK_RAM,   Pico.ram);\r
 267     CHECKED_WRITE_BUFF(CHUNK_VSRAM, Pico.vsram);\r
 268     CHECKED_WRITE_BUFF(CHUNK_IOPORTS, Pico.ioports);\r
 269     ym2612_pack_state();\r
 270     CHECKED_WRITE(CHUNK_FM, 0x200+4, ym2612_regs);\r
 271   }\r
 272   else {\r
 273     CHECKED_WRITE_BUFF(CHUNK_SMS, Pico.ms);\r
 274   }\r
 275 \r
 276   CHECKED_WRITE_BUFF(CHUNK_VRAM,  Pico.vram);\r
 277   CHECKED_WRITE_BUFF(CHUNK_ZRAM,  Pico.zram);\r
 278   CHECKED_WRITE_BUFF(CHUNK_CRAM,  Pico.cram);\r
 279   CHECKED_WRITE_BUFF(CHUNK_MISC,  Pico.m);\r
 280   CHECKED_WRITE_BUFF(CHUNK_VIDEO, Pico.video);\r
 281 \r
 282   z80_pack(buff_z80);\r
 283   CHECKED_WRITE_BUFF(CHUNK_Z80, buff_z80);\r
 284   CHECKED_WRITE(CHUNK_PSG, 28*4, sn76496_regs);\r
 285 \r
 286   if (PicoAHW & PAHW_MCD)\r
 287   {\r
 288     memset(buff, 0, sizeof(buff));\r
 289     SekPackCpu(buff, 1);\r
 290     if (Pico_mcd->s68k_regs[3] & 4) // 1M mode?\r
 291       wram_1M_to_2M(Pico_mcd->word_ram2M);\r
 292     Pico_mcd->m.hint_vector = *(unsigned short *)(Pico_mcd->bios + 0x72);\r
 293 \r
 294     CHECKED_WRITE_BUFF(CHUNK_S68K,     buff);\r
 295     CHECKED_WRITE_BUFF(CHUNK_PRG_RAM,  Pico_mcd->prg_ram);\r
 296     CHECKED_WRITE_BUFF(CHUNK_WORD_RAM, Pico_mcd->word_ram2M); // in 2M format\r
 297     CHECKED_WRITE_BUFF(CHUNK_PCM_RAM,  Pico_mcd->pcm_ram);\r
 298     CHECKED_WRITE_BUFF(CHUNK_BRAM,     Pico_mcd->bram);\r
 299     CHECKED_WRITE_BUFF(CHUNK_GA_REGS,  Pico_mcd->s68k_regs); // GA regs, not CPU regs\r
 300     CHECKED_WRITE_BUFF(CHUNK_PCM,      Pico_mcd->pcm);\r
 301     CHECKED_WRITE_BUFF(CHUNK_CDD,      Pico_mcd->cdd);\r
 302     CHECKED_WRITE_BUFF(CHUNK_CDC,      Pico_mcd->cdc);\r
 303     CHECKED_WRITE_BUFF(CHUNK_SCD,      Pico_mcd->scd);\r
 304     CHECKED_WRITE_BUFF(CHUNK_RC,       Pico_mcd->rot_comp);\r
 305     CHECKED_WRITE_BUFF(CHUNK_MISC_CD,  Pico_mcd->m);\r
 306 \r
 307     if (Pico_mcd->s68k_regs[3] & 4) // convert back\r
 308       wram_2M_to_1M(Pico_mcd->word_ram2M);\r
 309   }\r
 310 \r
 311   if (PicoAHW & PAHW_32X)\r
 312   {\r
 313     unsigned char cpubuff[SH2_STATE_SIZE];\r
 314 \r
 315     memset(cpubuff, 0, sizeof(cpubuff));\r
 316 \r
 317     sh2_pack(&sh2s[0], cpubuff);\r
 318     CHECKED_WRITE_BUFF(CHUNK_MSH2,      cpubuff);\r
 319     CHECKED_WRITE_BUFF(CHUNK_MSH2_DATA, Pico32xMem->data_array[0]);\r
 320     CHECKED_WRITE_BUFF(CHUNK_MSH2_PERI, Pico32xMem->sh2_peri_regs[0]);\r
 321 \r
 322     sh2_pack(&sh2s[1], cpubuff);\r
 323     CHECKED_WRITE_BUFF(CHUNK_SSH2,      cpubuff);\r
 324     CHECKED_WRITE_BUFF(CHUNK_SSH2_DATA, Pico32xMem->data_array[1]);\r
 325     CHECKED_WRITE_BUFF(CHUNK_SSH2_PERI, Pico32xMem->sh2_peri_regs[1]);\r
 326 \r
 327     CHECKED_WRITE_BUFF(CHUNK_32XSYS,    Pico32x);\r
 328     CHECKED_WRITE_BUFF(CHUNK_M68K_BIOS, Pico32xMem->m68k_rom);\r
 329     CHECKED_WRITE_BUFF(CHUNK_MSH2_BIOS, Pico32xMem->sh2_rom_m);\r
 330     CHECKED_WRITE_BUFF(CHUNK_SSH2_BIOS, Pico32xMem->sh2_rom_s);\r
 331     CHECKED_WRITE_BUFF(CHUNK_SDRAM,     Pico32xMem->sdram);\r
 332     CHECKED_WRITE_BUFF(CHUNK_DRAM,      Pico32xMem->dram);\r
 333     CHECKED_WRITE_BUFF(CHUNK_32XPAL,    Pico32xMem->pal);\r
 334   }\r
 335 \r
 336   if (carthw_chunks != NULL)\r
 337   {\r
 338     carthw_state_chunk *chwc;\r
 339     if (PicoStateProgressCB)\r
 340       PicoStateProgressCB("Saving.. cart hw state");\r
 341     for (chwc = carthw_chunks; chwc->ptr != NULL; chwc++)\r
 342       CHECKED_WRITE(chwc->chunk, chwc->size, chwc->ptr);\r
 343   }\r
 344 \r
 345   return 0;\r
 346 }\r
 347 \r
 348 static int g_read_offs = 0;\r
 349 \r
 350 #define R_ERROR_RETURN(error) \\r
 351 { \\r
 352   elprintf(EL_STATUS, "load_state @ %x: " error, g_read_offs); \\r
 353   return 1; \\r
 354 }\r
 355 \r
 356 // when is eof really set?\r
 357 #define CHECKED_READ(len,data) { \\r
 358   if (areaRead(data, 1, len, file) != len) { \\r
 359     if (len == 1 && areaEof(file)) goto readend; \\r
 360     R_ERROR_RETURN("areaRead: premature EOF\n"); \\r
 361     return 1; \\r
 362   } \\r
 363   g_read_offs += len; \\r
 364 }\r
 365 \r
 366 #define CHECKED_READ2(len2,data) { \\r
 367   if (len2 != len) { \\r
 368     elprintf(EL_STATUS, "unexpected len %i, wanted %i (%s)", len, len2, #len2); \\r
 369     if (len > len2) R_ERROR_RETURN("failed."); \\r
 370     /* else read anyway and hope for the best.. */ \\r
 371   } \\r
 372   CHECKED_READ(len, data); \\r
 373 }\r
 374 \r
 375 #define CHECKED_READ_BUFF(buff) CHECKED_READ2(sizeof(buff), &buff);\r
 376 \r
 377 static int state_load(void *file)\r
 378 {\r
 379   unsigned char buff_m68k[0x60], buff_s68k[0x60];\r
 380   unsigned char buff_z80[Z80_STATE_SIZE];\r
 381   unsigned char buff_sh2[SH2_STATE_SIZE];\r
 382   unsigned char chunk;\r
 383   void *ym2612_regs;\r
 384   char header[8];\r
 385   int ver, len;\r
 386 \r
 387   g_read_offs = 0;\r
 388   CHECKED_READ(8, header);\r
 389   if (strncmp(header, "PicoSMCD", 8) && strncmp(header, "PicoSEXT", 8))\r
 390     R_ERROR_RETURN("bad header");\r
 391   CHECKED_READ(4, &ver);\r
 392 \r
 393   while (!areaEof(file))\r
 394   {\r
 395     CHECKED_READ(1, &chunk);\r
 396     CHECKED_READ(4, &len);\r
 397     if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");\r
 398     if (CHUNK_S68K <= chunk && chunk <= CHUNK_MISC_CD && !(PicoAHW & PAHW_MCD))\r
 399       R_ERROR_RETURN("cd chunk in non CD state?");\r
 400     if (CHUNK_MSH2 <= chunk && chunk <= CHUNK_32XPAL && !(PicoAHW & PAHW_32X))\r
 401       R_ERROR_RETURN("32x chunk in non 32x state?");\r
 402 \r
 403     switch (chunk)\r
 404     {\r
 405       case CHUNK_M68K:\r
 406         CHECKED_READ_BUFF(buff_m68k);\r
 407         break;\r
 408 \r
 409       case CHUNK_Z80:\r
 410         CHECKED_READ_BUFF(buff_z80);\r
 411         z80_unpack(buff_z80);\r
 412         break;\r
 413 \r
 414       case CHUNK_RAM:     CHECKED_READ_BUFF(Pico.ram); break;\r
 415       case CHUNK_VRAM:    CHECKED_READ_BUFF(Pico.vram); break;\r
 416       case CHUNK_ZRAM:    CHECKED_READ_BUFF(Pico.zram); break;\r
 417       case CHUNK_CRAM:    CHECKED_READ_BUFF(Pico.cram); break;\r
 418       case CHUNK_VSRAM:   CHECKED_READ_BUFF(Pico.vsram); break;\r
 419       case CHUNK_MISC:    CHECKED_READ_BUFF(Pico.m); break;\r
 420       case CHUNK_VIDEO:   CHECKED_READ_BUFF(Pico.video); break;\r
 421       case CHUNK_IOPORTS: CHECKED_READ_BUFF(Pico.ioports); break;\r
 422       case CHUNK_PSG:     CHECKED_READ2(28*4, sn76496_regs); break;\r
 423       case CHUNK_FM:\r
 424         ym2612_regs = YM2612GetRegs();\r
 425         CHECKED_READ2(0x200+4, ym2612_regs);\r
 426         ym2612_unpack_state();\r
 427         break;\r
 428 \r
 429       case CHUNK_SMS:\r
 430         CHECKED_READ_BUFF(Pico.ms);\r
 431         break;\r
 432 \r
 433       // cd stuff\r
 434       case CHUNK_S68K:\r
 435         CHECKED_READ_BUFF(buff_s68k);\r
 436         break;\r
 437 \r
 438       case CHUNK_PRG_RAM:  CHECKED_READ_BUFF(Pico_mcd->prg_ram); break;\r
 439       case CHUNK_WORD_RAM: CHECKED_READ_BUFF(Pico_mcd->word_ram2M); break;\r
 440       case CHUNK_PCM_RAM:  CHECKED_READ_BUFF(Pico_mcd->pcm_ram); break;\r
 441       case CHUNK_BRAM:     CHECKED_READ_BUFF(Pico_mcd->bram); break;\r
 442       case CHUNK_GA_REGS:  CHECKED_READ_BUFF(Pico_mcd->s68k_regs); break;\r
 443       case CHUNK_PCM:      CHECKED_READ_BUFF(Pico_mcd->pcm); break;\r
 444       case CHUNK_CDD:      CHECKED_READ_BUFF(Pico_mcd->cdd); break;\r
 445       case CHUNK_CDC:      CHECKED_READ_BUFF(Pico_mcd->cdc); break;\r
 446       case CHUNK_SCD:      CHECKED_READ_BUFF(Pico_mcd->scd); break;\r
 447       case CHUNK_RC:       CHECKED_READ_BUFF(Pico_mcd->rot_comp); break;\r
 448       case CHUNK_MISC_CD:  CHECKED_READ_BUFF(Pico_mcd->m); break;\r
 449 \r
 450       // 32x stuff\r
 451       case CHUNK_MSH2:\r
 452         CHECKED_READ_BUFF(buff_sh2);\r
 453         sh2_unpack(&sh2s[0], buff_sh2);\r
 454         break;\r
 455 \r
 456       case CHUNK_SSH2:\r
 457         CHECKED_READ_BUFF(buff_sh2);\r
 458         sh2_unpack(&sh2s[1], buff_sh2);\r
 459         break;\r
 460 \r
 461       case CHUNK_MSH2_DATA:   CHECKED_READ_BUFF(Pico32xMem->data_array[0]); break;\r
 462       case CHUNK_MSH2_PERI:   CHECKED_READ_BUFF(Pico32xMem->sh2_peri_regs[0]); break;\r
 463       case CHUNK_SSH2_DATA:   CHECKED_READ_BUFF(Pico32xMem->data_array[1]); break;\r
 464       case CHUNK_SSH2_PERI:   CHECKED_READ_BUFF(Pico32xMem->sh2_peri_regs[1]); break;\r
 465       case CHUNK_32XSYS:      CHECKED_READ_BUFF(Pico32x); break;\r
 466       case CHUNK_M68K_BIOS:   CHECKED_READ_BUFF(Pico32xMem->m68k_rom); break;\r
 467       case CHUNK_MSH2_BIOS:   CHECKED_READ_BUFF(Pico32xMem->sh2_rom_m); break;\r
 468       case CHUNK_SSH2_BIOS:   CHECKED_READ_BUFF(Pico32xMem->sh2_rom_s); break;\r
 469       case CHUNK_SDRAM:       CHECKED_READ_BUFF(Pico32xMem->sdram); break;\r
 470       case CHUNK_DRAM:        CHECKED_READ_BUFF(Pico32xMem->dram); break;\r
 471       case CHUNK_32XPAL:      CHECKED_READ_BUFF(Pico32xMem->pal); break;\r
 472 \r
 473       default:\r
 474         if (carthw_chunks != NULL)\r
 475         {\r
 476           carthw_state_chunk *chwc;\r
 477           for (chwc = carthw_chunks; chwc->ptr != NULL; chwc++) {\r
 478             if (chwc->chunk == chunk) {\r
 479               CHECKED_READ2(chwc->size, chwc->ptr);\r
 480               goto breakswitch;\r
 481             }\r
 482           }\r
 483         }\r
 484         elprintf(EL_STATUS, "load_state: skipping unknown chunk %i of size %i", chunk, len);\r
 485         areaSeek(file, len, SEEK_CUR);\r
 486         break;\r
 487     }\r
 488 breakswitch:;\r
 489   }\r
 490 \r
 491 readend:\r
 492   if (PicoAHW & PAHW_SMS)\r
 493     PicoStateLoadedMS();\r
 494 \r
 495   if (PicoAHW & PAHW_MCD)\r
 496   {\r
 497     PicoMemStateLoaded();\r
 498 \r
 499     if (!(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))\r
 500       cdda_start_play();\r
 501 \r
 502     // must unpack after mem is set up\r
 503     SekUnpackCpu(buff_s68k, 1);\r
 504   }\r
 505 \r
 506   if (!(PicoAHW & PAHW_SMS))\r
 507     SekUnpackCpu(buff_m68k, 0);\r
 508 \r
 509   if (PicoAHW & PAHW_32X)\r
 510     Pico32xStateLoaded();\r
 511 \r
 512   return 0;\r
 513 }\r
 514 \r
 515 static int state_load_gfx(void *file)\r
 516 {\r
 517   int ver, len, found = 0, to_find = 4;\r
 518   char buff[8];\r
 519 \r
 520   if (PicoAHW & PAHW_32X)\r
 521     to_find += 2;\r
 522 \r
 523   g_read_offs = 0;\r
 524   CHECKED_READ(8, buff);\r
 525   if (strncmp((char *)buff, "PicoSMCD", 8) && strncmp((char *)buff, "PicoSEXT", 8))\r
 526     R_ERROR_RETURN("bad header");\r
 527   CHECKED_READ(4, &ver);\r
 528 \r
 529   while (!areaEof(file) && found < to_find)\r
 530   {\r
 531     CHECKED_READ(1, buff);\r
 532     CHECKED_READ(4, &len);\r
 533     if (len < 0 || len > 1024*512) R_ERROR_RETURN("bad length");\r
 534     if (buff[0] > CHUNK_FM && buff[0] <= CHUNK_MISC_CD && !(PicoAHW & PAHW_MCD))\r
 535       R_ERROR_RETURN("cd chunk in non CD state?");\r
 536 \r
 537     switch (buff[0])\r
 538     {\r
 539       case CHUNK_VRAM:  CHECKED_READ_BUFF(Pico.vram);  found++; break;\r
 540       case CHUNK_CRAM:  CHECKED_READ_BUFF(Pico.cram);  found++; break;\r
 541       case CHUNK_VSRAM: CHECKED_READ_BUFF(Pico.vsram); found++; break;\r
 542       case CHUNK_VIDEO: CHECKED_READ_BUFF(Pico.video); found++; break;\r
 543 \r
 544       case CHUNK_DRAM:\r
 545         if (Pico32xMem != NULL)\r
 546           CHECKED_READ_BUFF(Pico32xMem->dram);\r
 547         break;\r
 548 \r
 549       case CHUNK_32XPAL:\r
 550         if (Pico32xMem != NULL)\r
 551           CHECKED_READ_BUFF(Pico32xMem->pal);\r
 552         Pico32x.dirty_pal = 1;\r
 553         break;\r
 554 \r
 555       case CHUNK_32XSYS:\r
 556         CHECKED_READ_BUFF(Pico32x);\r
 557         break;\r
 558 \r
 559       default:\r
 560         areaSeek(file, len, SEEK_CUR);\r
 561         break;\r
 562     }\r
 563   }\r
 564 \r
 565 readend:\r
 566   return 0;\r
 567 }\r
 568 \r
 569 int PicoState(const char *fname, int is_save)\r
 570 {\r
 571   void *afile = NULL;\r
 572   int ret;\r
 573 \r
 574   afile = open_save_file(fname, is_save);\r
 575   if (afile == NULL)\r
 576     return -1;\r
 577 \r
 578   if (is_save)\r
 579     ret = state_save(afile);\r
 580   else {\r
 581     ret = state_load(afile);\r
 582     if (ret != 0) {\r
 583       areaSeek(afile, 0, SEEK_SET);\r
 584       ret = state_load_legacy(afile);\r
 585     }\r
 586 \r
 587     if (PicoLoadStateHook != NULL)\r
 588       PicoLoadStateHook();\r
 589     Pico.m.dirtyPal = 1;\r
 590   }\r
 591 \r
 592   areaClose(afile);\r
 593   return ret;\r
 594 }\r
 595 \r
 596 int PicoStateLoadGfx(const char *fname)\r
 597 {\r
 598   void *afile;\r
 599   int ret;\r
 600 \r
 601   afile = open_save_file(fname, 0);\r
 602   if (afile == NULL)\r
 603     return -1;\r
 604 \r
 605   ret = state_load_gfx(afile);\r
 606   if (ret != 0) {\r
 607     // assume legacy\r
 608     areaSeek(afile, 0x10020, SEEK_SET);  // skip header and RAM\r
 609     areaRead(Pico.vram, 1, sizeof(Pico.vram), afile);\r
 610     areaSeek(afile, 0x2000, SEEK_CUR);\r
 611     areaRead(Pico.cram, 1, sizeof(Pico.cram), afile);\r
 612     areaRead(Pico.vsram, 1, sizeof(Pico.vsram), afile);\r
 613     areaSeek(afile, 0x221a0, SEEK_SET);\r
 614     areaRead(&Pico.video, 1, sizeof(Pico.video), afile);\r
 615   }\r
 616   areaClose(afile);\r
 617   return 0;\r
 618 }\r
 619 \r
 620 // tmp state\r
 621 struct PicoTmp\r
 622 {\r
 623   unsigned short vram[0x8000];\r
 624   unsigned short cram[0x40];\r
 625   unsigned short vsram[0x40];\r
 626 \r
 627   //struct PicoMisc m;\r
 628   struct PicoVideo video;\r
 629 \r
 630   struct {\r
 631     struct Pico32x p32x;\r
 632     unsigned short dram[2][0x20000/2];\r
 633     unsigned short pal[0x100];\r
 634   } t32x;\r
 635 };\r
 636 \r
 637 // returns data ptr to free() or PicoTmpStateRestore()\r
 638 void *PicoTmpStateSave(void)\r
 639 {\r
 640   // gfx only for now\r
 641   struct PicoTmp *t = malloc(sizeof(*t));\r
 642   if (t == NULL)\r
 643     return NULL;\r
 644 \r
 645   memcpy(t->vram, Pico.vram, sizeof(Pico.vram));\r
 646   memcpy(t->cram, Pico.cram, sizeof(Pico.cram));\r
 647   memcpy(t->vsram, Pico.vsram, sizeof(Pico.vsram));\r
 648   memcpy(&t->video, &Pico.video, sizeof(Pico.video));\r
 649 \r
 650   if (PicoAHW & PAHW_32X) {\r
 651     memcpy(&t->t32x.p32x, &Pico32x, sizeof(Pico32x));\r
 652     memcpy(t->t32x.dram, Pico32xMem->dram, sizeof(Pico32xMem->dram));\r
 653     memcpy(t->t32x.pal, Pico32xMem->pal, sizeof(Pico32xMem->pal));\r
 654   }\r
 655 \r
 656   return t;\r
 657 }\r
 658 \r
 659 void PicoTmpStateRestore(void *data)\r
 660 {\r
 661   struct PicoTmp *t = data;\r
 662   if (t == NULL)\r
 663     return;\r
 664 \r
 665   memcpy(Pico.vram, t->vram, sizeof(Pico.vram));\r
 666   memcpy(Pico.cram, t->cram, sizeof(Pico.cram));\r
 667   memcpy(Pico.vsram, t->vsram, sizeof(Pico.vsram));\r
 668   memcpy(&Pico.video, &t->video, sizeof(Pico.video));\r
 669   Pico.m.dirtyPal = 1;\r
 670 \r
 671   if (PicoAHW & PAHW_32X) {\r
 672     memcpy(&Pico32x, &t->t32x.p32x, sizeof(Pico32x));\r
 673     memcpy(Pico32xMem->dram, t->t32x.dram, sizeof(Pico32xMem->dram));\r
 674     memcpy(Pico32xMem->pal, t->t32x.pal, sizeof(Pico32xMem->pal));\r
 675     Pico32x.dirty_pal = 1;\r
 676   }\r
 677 }\r
 678 \r
 679 // vim:shiftwidth=2:expandtab\r