gp2x/emu.c

   1 // (c) Copyright 2006 notaz, All rights reserved.\r
   2 // Free for non-commercial use.\r
   3 \r
   4 // For commercial use, separate licencing terms must be obtained.\r
   5 \r
   6 #include <stdio.h>\r
   7 #include <stdlib.h>\r
   8 #include <sys/time.h>\r
   9 #include <linux/limits.h>\r
  10 #include <ctype.h>\r
  11 #include <unistd.h>\r
  12 \r
  13 #include <stdarg.h>\r
  14 \r
  15 #include "emu.h"\r
  16 #include "gp2x.h"\r
  17 #include "usbjoy.h"\r
  18 #include "menu.h"\r
  19 #include "asmutils.h"\r
  20 #include "cpuctrl.h"\r
  21 \r
  22 #include "Pico/PicoInt.h"\r
  23 #include "zlib/zlib.h"\r
  24 \r
  25 \r
  26 #ifdef BENCHMARK\r
  27 #define OSD_FPS_X 220\r
  28 #else\r
  29 #define OSD_FPS_X 260\r
  30 #endif\r
  31 \r
  32 // PicoPad[] format: SACB RLDU\r
  33 char *actionNames[] = {\r
  34         "UP", "DOWN", "LEFT", "RIGHT", "B", "C", "A", "START",\r
  35         0, 0, 0, 0, 0, 0, 0, 0, // Z, Y, X, MODE (enabled only when needed), ?, ?, ?, ?\r
  36         0, 0, 0, 0, 0, 0, 0, "ENTER MENU", // player2_flag, ?, ?, ?, ?, ?, ?, menu\r
  37         "NEXT SAVE SLOT", "PREV SAVE SLOT", "SWITCH RENDERER", "SAVE STATE",\r
  38         "LOAD STATE", "VOLUME UP", "VOLUME DOWN", "DONE"\r
  39 };\r
  40 \r
  41 int engineState;\r
  42 int select_exits = 0;\r
  43 char *PicoConfigFile = "picoconfig.bin";\r
  44 currentConfig_t currentConfig;\r
  45 \r
  46 char romFileName[PATH_MAX];\r
  47 unsigned char *rom_data = NULL;\r
  48 \r
  49 extern int crashed_940;\r
  50 \r
  51 static char noticeMsg[64];                                      // notice msg to draw\r
  52 static struct timeval noticeMsgTime = { 0, 0 }; // when started showing\r
  53 static int reset_timing, osd_fps_x;\r
  54 static int combo_keys = 0, combo_acts = 0;      // keys and actions which need button combos\r
  55 static int gp2x_old_gamma = 100;\r
  56 static unsigned char *movie_data = NULL;\r
  57 static int movie_size = 0;\r
  58 int frame_count = 0;\r
  59 unsigned char *framebuff = 0;  // temporary buffer for alt renderer\r
  60 int state_slot = 0;\r
  61 \r
  62 /*\r
  63 // tmp\r
  64 static FILE *logf = NULL;\r
  65 \r
  66 void pprintf(char *texto, ...)\r
  67 {\r
  68         va_list args;\r
  69 \r
  70         va_start(args,texto);\r
  71         vfprintf(logf,texto,args);\r
  72         va_end(args);\r
  73         fflush(logf);\r
  74         sync();\r
  75 }\r
  76 */\r
  77 // utilities\r
  78 static void strlwr(char* string)\r
  79 {\r
  80         while ( (*string++ = (char)tolower(*string)) );\r
  81 }\r
  82 \r
  83 static int try_rfn_ext(char *ext)\r
  84 {\r
  85         FILE *tmp;\r
  86         char *p;\r
  87 \r
  88         p = romFileName + strlen(romFileName) - 4;\r
  89         if (p < romFileName) p = romFileName;\r
  90         strcpy(p, ext);\r
  91 \r
  92         if((tmp = fopen(romFileName, "rb"))) {\r
  93                 fclose(tmp);\r
  94                 return 1;\r
  95         }\r
  96         return 0;\r
  97 }\r
  98 \r
  99 int emu_ReloadRom(void)\r
 100 {\r
 101         unsigned int rom_size = 0;\r
 102         char ext[5], *p;\r
 103         FILE *rom;\r
 104         int ret;\r
 105 \r
 106         printf("emu_ReloadRom(%s)\n", romFileName);\r
 107 \r
 108         // detect wrong extensions (.srm and .mds)\r
 109         p = romFileName + strlen(romFileName) - 4;\r
 110         if (p < romFileName) p = romFileName;\r
 111         strncpy(ext, p, 4);\r
 112         ext[4] = 0;\r
 113         strlwr(ext);\r
 114 \r
 115         if(!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) { // s.gz ~ .mds.gz\r
 116                 sprintf(menuErrorMsg, "Not a ROM selected.");\r
 117                 return 0;\r
 118         }\r
 119 \r
 120         // check for movie file\r
 121         if(movie_data) {\r
 122                 free(movie_data);\r
 123                 movie_data = 0;\r
 124         }\r
 125         if(!strcmp(ext, ".gmv")) {\r
 126                 // check for both gmv and rom\r
 127                 int dummy;\r
 128                 FILE *movie_file = fopen(romFileName, "rb");\r
 129                 if(!movie_file) {\r
 130                         sprintf(menuErrorMsg, "Failed to open movie.");\r
 131                         return 0;\r
 132                 }\r
 133                 fseek(movie_file, 0, SEEK_END);\r
 134                 movie_size = ftell(movie_file);\r
 135                 fseek(movie_file, 0, SEEK_SET);\r
 136                 if(movie_size < 64+3) {\r
 137                         sprintf(menuErrorMsg, "Invalid GMV file.");\r
 138                         fclose(movie_file);\r
 139                         return 0;\r
 140                 }\r
 141                 movie_data = malloc(movie_size);\r
 142                 if(movie_data == NULL) {\r
 143                         sprintf(menuErrorMsg, "low memory.");\r
 144                         fclose(movie_file);\r
 145                         return 0;\r
 146                 }\r
 147                 fread(movie_data, 1, movie_size, movie_file);\r
 148                 fclose(movie_file);\r
 149                 if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {\r
 150                         sprintf(menuErrorMsg, "Invalid GMV file.");\r
 151                         return 0;\r
 152                 }\r
 153                 dummy = try_rfn_ext(".zip") || try_rfn_ext(".bin") ||\r
 154                         try_rfn_ext(".smd") || try_rfn_ext(".gen");\r
 155                 if (!dummy) {\r
 156                         sprintf(menuErrorMsg, "Could't find a ROM for movie.");\r
 157                         return 0;\r
 158                 }\r
 159         }\r
 160 \r
 161         rom = fopen(romFileName, "rb");\r
 162         if(!rom) {\r
 163                 sprintf(menuErrorMsg, "Failed to open rom.");\r
 164                 return 0;\r
 165         }\r
 166 \r
 167         if(rom_data) {\r
 168                 free(rom_data);\r
 169                 rom_data = 0;\r
 170                 rom_size = 0;\r
 171         }\r
 172 \r
 173         // zipfile support\r
 174         if(!strcasecmp(ext, ".zip")) {\r
 175                 fclose(rom);\r
 176                 ret = CartLoadZip(romFileName, &rom_data, &rom_size);\r
 177                 if(ret) {\r
 178                         if (ret == 4) strcpy(menuErrorMsg, "No ROMs in zip found.");\r
 179                         else sprintf(menuErrorMsg, "Unzip failed with code %i", ret);\r
 180                         printf("%s\n", menuErrorMsg);\r
 181                         return 0;\r
 182                 }\r
 183         } else {\r
 184                 if( (ret = PicoCartLoad(rom, &rom_data, &rom_size)) ) {\r
 185                         sprintf(menuErrorMsg, "PicoCartLoad() failed.");\r
 186                         printf("%s\n", menuErrorMsg);\r
 187                         fclose(rom);\r
 188                         return 0;\r
 189                 }\r
 190                 fclose(rom);\r
 191         }\r
 192 \r
 193         // detect wrong files (Pico crashes on very small files), also see if ROM EP is good\r
 194         if(rom_size <= 0x200 || strncmp((char *)rom_data, "Pico", 4) == 0 ||\r
 195           ((*(unsigned short *)(rom_data+4)<<16)|(*(unsigned short *)(rom_data+6))) >= (int)rom_size) {\r
 196                 if (rom_data) free(rom_data);\r
 197                 rom_data = 0;\r
 198                 sprintf(menuErrorMsg, "Not a ROM selected.");\r
 199                 return 0;\r
 200         }\r
 201 \r
 202         printf("PicoCartInsert(%p, %d);\n", rom_data, rom_size);\r
 203         if(PicoCartInsert(rom_data, rom_size)) {\r
 204                 sprintf(menuErrorMsg, "Failed to load ROM.");\r
 205                 return 0;\r
 206         }\r
 207 \r
 208         // load config for this ROM\r
 209         ret = emu_ReadConfig(1);\r
 210         if (!ret)\r
 211                 emu_ReadConfig(0);\r
 212 \r
 213         // emu_ReadConfig() might have messed currentConfig.lastRomFile\r
 214         strncpy(currentConfig.lastRomFile, romFileName, sizeof(currentConfig.lastRomFile)-1);\r
 215         currentConfig.lastRomFile[sizeof(currentConfig.lastRomFile)-1] = 0;\r
 216 \r
 217         // additional movie stuff\r
 218         if(movie_data) {\r
 219                 if(movie_data[0x14] == '6')\r
 220                      PicoOpt |=  0x20; // 6 button pad\r
 221                 else PicoOpt &= ~0x20;\r
 222                 PicoOpt |= 0x40; // accurate timing\r
 223                 if(movie_data[0xF] >= 'A') {\r
 224                         if(movie_data[0x16] & 0x80) {\r
 225                                 PicoRegionOverride = 8;\r
 226                         } else {\r
 227                                 PicoRegionOverride = 4;\r
 228                         }\r
 229                         PicoReset(0);\r
 230                         // TODO: bits 6 & 5\r
 231                 }\r
 232                 movie_data[0x18+30] = 0;\r
 233                 sprintf(noticeMsg, "MOVIE: %s", (char *) &movie_data[0x18]);\r
 234         }\r
 235         else\r
 236         {\r
 237                 if(Pico.m.pal) {\r
 238                         strcpy(noticeMsg, "PAL SYSTEM / 50 FPS");\r
 239                 } else {\r
 240                         strcpy(noticeMsg, "NTSC SYSTEM / 60 FPS");\r
 241                 }\r
 242         }\r
 243         gettimeofday(&noticeMsgTime, 0);\r
 244 \r
 245         // load SRAM for this ROM\r
 246         if(currentConfig.EmuOpt & 1)\r
 247                 emu_SaveLoadGame(1, 1);\r
 248 \r
 249         frame_count = 0;\r
 250 \r
 251         return 1;\r
 252 }\r
 253 \r
 254 \r
 255 void emu_Init(void)\r
 256 {\r
 257         // make temp buffer for alt renderer\r
 258         framebuff = malloc((8+320)*(8+240+8));\r
 259         if (!framebuff)\r
 260         {\r
 261                 printf("framebuff == 0\n");\r
 262         }\r
 263 \r
 264         PicoInit();\r
 265 \r
 266 //      logf = fopen("log.txt", "w");\r
 267 }\r
 268 \r
 269 \r
 270 static void romfname_ext(char *dst, char *ext)\r
 271 {\r
 272         char *p;\r
 273 \r
 274         // make save filename\r
 275         for (p = romFileName+strlen(romFileName)-1; p >= romFileName && *p != '/'; p--); p++;\r
 276         strncpy(dst, p, 511);\r
 277         dst[511-8] = 0;\r
 278         if(dst[strlen(dst)-4] == '.') dst[strlen(dst)-4] = 0;\r
 279         strcat(dst, ext);\r
 280 }\r
 281 \r
 282 \r
 283 static void find_combos(void)\r
 284 {\r
 285         int act, u;\r
 286 \r
 287         // find out which keys and actions are combos\r
 288         combo_keys = combo_acts = 0;\r
 289         for (act = 0; act < 32; act++)\r
 290         {\r
 291                 int keyc = 0;\r
 292                 if (act == 16) continue; // player2 flag\r
 293                 for (u = 0; u < 32; u++)\r
 294                 {\r
 295                         if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;\r
 296                 }\r
 297                 if (keyc > 1)\r
 298                 {\r
 299                         // loop again and mark those keys and actions as combo\r
 300                         for (u = 0; u < 32; u++)\r
 301                         {\r
 302                                 if (currentConfig.KeyBinds[u] & (1 << act)) {\r
 303                                         combo_keys |= 1 << u;\r
 304                                         combo_acts |= 1 << act;\r
 305                                 }\r
 306                         }\r
 307                 }\r
 308         }\r
 309         // printf("combo keys/acts: %08x %08x\n", combo_keys, combo_acts);\r
 310 }\r
 311 \r
 312 \r
 313 int emu_ReadConfig(int game)\r
 314 {\r
 315         FILE *f;\r
 316         char cfg[512];\r
 317         int bread = 0;\r
 318 \r
 319         if (!game)\r
 320         {\r
 321                 // set default config\r
 322                 memset(&currentConfig, 0, sizeof(currentConfig));\r
 323                 currentConfig.lastRomFile[0] = 0;\r
 324                 currentConfig.EmuOpt  = 0x1f;\r
 325                 currentConfig.PicoOpt = 0x0f;\r
 326                 currentConfig.PsndRate = 22050;\r
 327                 currentConfig.PicoRegion = 0; // auto\r
 328                 currentConfig.Frameskip = -1; // auto\r
 329                 currentConfig.CPUclock = 200;\r
 330                 currentConfig.volume = 50;\r
 331                 currentConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU\r
 332                 currentConfig.KeyBinds[ 4] = 1<<1;\r
 333                 currentConfig.KeyBinds[ 2] = 1<<2;\r
 334                 currentConfig.KeyBinds[ 6] = 1<<3;\r
 335                 currentConfig.KeyBinds[14] = 1<<4;\r
 336                 currentConfig.KeyBinds[13] = 1<<5;\r
 337                 currentConfig.KeyBinds[12] = 1<<6;\r
 338                 currentConfig.KeyBinds[ 8] = 1<<7;\r
 339                 currentConfig.KeyBinds[15] = 1<<26; // switch rend\r
 340                 currentConfig.KeyBinds[10] = 1<<27; // save state\r
 341                 currentConfig.KeyBinds[11] = 1<<28; // load state\r
 342                 currentConfig.KeyBinds[23] = 1<<29; // vol up\r
 343                 currentConfig.KeyBinds[22] = 1<<30; // vol down\r
 344                 currentConfig.gamma = 100;\r
 345                 strncpy(cfg, PicoConfigFile, 511);\r
 346                 cfg[511] = 0;\r
 347         } else {\r
 348                 romfname_ext(cfg, ".pbcfg");\r
 349         }\r
 350 \r
 351         printf("emu_ReadConfig: %s ", cfg);\r
 352         f = fopen(cfg, "rb");\r
 353         if (f) {\r
 354                 bread = fread(&currentConfig, 1, sizeof(currentConfig), f);\r
 355                 fclose(f);\r
 356         }\r
 357         printf((bread == sizeof(currentConfig)) ? "(ok)\n" : "(failed)\n");\r
 358 \r
 359         PicoOpt = currentConfig.PicoOpt;\r
 360         PsndRate = currentConfig.PsndRate;\r
 361         PicoRegionOverride = currentConfig.PicoRegion;\r
 362         if (PicoOpt & 0x20) {\r
 363                 actionNames[ 8] = "Z"; actionNames[ 9] = "Y";\r
 364                 actionNames[10] = "X"; actionNames[11] = "MODE";\r
 365         }\r
 366         // some sanity checks\r
 367         if (currentConfig.CPUclock < 1 || currentConfig.CPUclock > 4096) currentConfig.CPUclock = 200;\r
 368         if (currentConfig.gamma < 10 || currentConfig.gamma > 300) currentConfig.gamma = 100;\r
 369         // if volume keys are unbound, bind them to volume control\r
 370         if (!currentConfig.KeyBinds[23] && !currentConfig.KeyBinds[22]) {\r
 371                 currentConfig.KeyBinds[23] = 1<<29; // vol up\r
 372                 currentConfig.KeyBinds[22] = 1<<30; // vol down\r
 373         }\r
 374 \r
 375         return (bread == sizeof(currentConfig));\r
 376 }\r
 377 \r
 378 \r
 379 int emu_WriteConfig(int game)\r
 380 {\r
 381         FILE *f;\r
 382         char cfg[512];\r
 383         int bwrite = 0;\r
 384 \r
 385         if (!game)\r
 386         {\r
 387                 strncpy(cfg, PicoConfigFile, 511);\r
 388                 cfg[511] = 0;\r
 389         } else {\r
 390                 romfname_ext(cfg, ".pbcfg");\r
 391         }\r
 392 \r
 393         printf("emu_WriteConfig: %s ", cfg);\r
 394         f = fopen(cfg, "wb");\r
 395         if (f) {\r
 396                 currentConfig.PicoOpt = PicoOpt;\r
 397                 currentConfig.PsndRate = PsndRate;\r
 398                 currentConfig.PicoRegion = PicoRegionOverride;\r
 399                 bwrite = fwrite(&currentConfig, 1, sizeof(currentConfig), f);\r
 400                 fflush(f);\r
 401                 fclose(f);\r
 402                 sync();\r
 403         }\r
 404         printf((bwrite == sizeof(currentConfig)) ? "(ok)\n" : "(failed)\n");\r
 405 \r
 406         return (bwrite == sizeof(currentConfig));\r
 407 }\r
 408 \r
 409 \r
 410 void emu_Deinit(void)\r
 411 {\r
 412         // save SRAM\r
 413         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 414                 emu_SaveLoadGame(0, 1);\r
 415                 SRam.changed = 0;\r
 416         }\r
 417 \r
 418         if (!(currentConfig.EmuOpt & 0x20))\r
 419                 emu_WriteConfig(0);\r
 420         free(framebuff);\r
 421 \r
 422         PicoExit();\r
 423 //      fclose(logf);\r
 424 \r
 425         // restore gamma\r
 426         if (gp2x_old_gamma != 100)\r
 427                 set_gamma(100);\r
 428 }\r
 429 \r
 430 \r
 431 void osd_text(int x, int y, char *text)\r
 432 {\r
 433         int len = strlen(text)*8;\r
 434 \r
 435         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 436                 int *p, i, h, black, white;\r
 437                 if (PicoOpt&0x10) {\r
 438                         black = 0x40404040; white = 0x41;\r
 439                 } else {\r
 440                         black = 0xe0e0e0e0; white = 0xf0;\r
 441                 }\r
 442                 x &= ~3; // align x\r
 443                 len = (len+3) >> 2;\r
 444                 for (h = 0; h < 8; h++) {\r
 445                         p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));\r
 446                         for (i = len; i; i--, p++) *p = black;\r
 447                 }\r
 448                 gp2x_text_out8_2(x, y, text, white);\r
 449         } else {\r
 450                 int *p, i, h;\r
 451                 x &= ~1; // align x\r
 452                 len = (len+1) >> 1;\r
 453                 for (h = 0; h < 8; h++) {\r
 454                         p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));\r
 455                         for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;\r
 456                 }\r
 457                 gp2x_text_out15(x, y, text);\r
 458         }\r
 459 }\r
 460 \r
 461 static int EmuScan16(unsigned int num, void *sdata)\r
 462 {\r
 463         if (!(Pico.video.reg[1]&8)) num += 8;\r
 464         DrawLineDest = (unsigned short *) gp2x_screen + 320*(num+1);\r
 465 \r
 466         return 0;\r
 467 }\r
 468 \r
 469 static int EmuScan8(unsigned int num, void *sdata)\r
 470 {\r
 471         if (!(Pico.video.reg[1]&8)) num += 8;\r
 472         DrawLineDest = (unsigned char *)  gp2x_screen + 320*(num+1);\r
 473 \r
 474         return 0;\r
 475 }\r
 476 \r
 477 static int localPal[0x100];\r
 478 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 479 \r
 480 static void blit(char *fps, char *notice)\r
 481 {\r
 482         if (PicoOpt&0x10) {\r
 483                 // 8bit fast renderer\r
 484                 if (Pico.m.dirtyPal) {\r
 485                         Pico.m.dirtyPal = 0;\r
 486                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 487                         // feed new palette to our device\r
 488                         gp2x_video_setpalette(localPal, 0x40);\r
 489                 }\r
 490                 vidCpyM2((unsigned char *)gp2x_screen+320*8, framebuff+328*8);\r
 491         } else if (!(currentConfig.EmuOpt&0x80)) {\r
 492                 // 8bit accurate renderer\r
 493                 if (Pico.m.dirtyPal) {\r
 494                         Pico.m.dirtyPal = 0;\r
 495                         if(Pico.video.reg[0xC]&8) { // shadow/hilight mode\r
 496                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 497                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 498                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 499                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*4);\r
 500                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 501                                 localPal[0xf0] = 0x00ffffff;\r
 502                                 gp2x_video_setpalette(localPal, 0x100);\r
 503                         } else if (rendstatus & 0x20) { // mid-frame palette changes\r
 504                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 505                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 506                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 507                                 gp2x_video_setpalette(localPal, 0xc0);\r
 508                         } else {\r
 509                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 510                                 gp2x_video_setpalette(localPal, 0x40);\r
 511                         }\r
 512                 }\r
 513         }\r
 514 \r
 515         if (notice) osd_text(4, 232, notice);\r
 516         if (currentConfig.EmuOpt & 2)\r
 517                 osd_text(osd_fps_x, 232, fps);\r
 518 \r
 519         //gp2x_video_wait_vsync();\r
 520         gp2x_video_flip();\r
 521 \r
 522         if (!(PicoOpt&0x10)) {\r
 523                 if (!(Pico.video.reg[1]&8)) {\r
 524                         if (currentConfig.EmuOpt&0x80) {\r
 525                                 DrawLineDest = (unsigned short *) gp2x_screen + 320*8;\r
 526                         } else {\r
 527                                 DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;\r
 528                         }\r
 529                 } else {\r
 530                         DrawLineDest = gp2x_screen;\r
 531                 }\r
 532         }\r
 533 }\r
 534 \r
 535 \r
 536 // clears whole screen or just the notice area (in all buffers)\r
 537 static void clearArea(int full)\r
 538 {\r
 539         if (PicoOpt&0x10) {\r
 540                 // 8bit fast renderer\r
 541                 if (full) gp2x_memset_all_buffers(0, 0x40, 320*240);\r
 542                 else      gp2x_memset_all_buffers(320*232, 0x40, 320*8);\r
 543         } else if (currentConfig.EmuOpt&0x80) {\r
 544                 // 16bit accurate renderer\r
 545                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 546                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 547         } else {\r
 548                 // 8bit accurate renderer\r
 549                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 550                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 551         }\r
 552 }\r
 553 \r
 554 \r
 555 static void vidResetMode(void)\r
 556 {\r
 557         if (PicoOpt&0x10) {\r
 558                 localPal[0x40] = 0;\r
 559                 localPal[0x41] = 0x00ffffff;\r
 560                 gp2x_video_changemode(8);\r
 561                 gp2x_video_setpalette(localPal, 0x42);\r
 562                 gp2x_memset_all_buffers(0, 0x40, 320*240);\r
 563                 gp2x_video_flip();\r
 564         } else if (currentConfig.EmuOpt&0x80) {\r
 565                 gp2x_video_changemode(15);\r
 566                 PicoDrawSetColorFormat(1);\r
 567                 PicoScan = EmuScan16;\r
 568                 PicoScan(0, 0);\r
 569         } else {\r
 570                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 571                 localPal[0xf0] = 0x00ffffff;\r
 572                 gp2x_video_changemode(8);\r
 573                 gp2x_video_setpalette(localPal, 0x100);\r
 574                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 575                 gp2x_video_flip();\r
 576                 PicoDrawSetColorFormat(2);\r
 577                 PicoScan = EmuScan8;\r
 578                 PicoScan(0, 0);\r
 579         }\r
 580         Pico.m.dirtyPal = 1;\r
 581         // reset scaling\r
 582         gp2x_video_RGB_setscaling((PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 583 }\r
 584 \r
 585 \r
 586 static int check_save_file(void)\r
 587 {\r
 588         char saveFname[512];\r
 589         char ext[16];\r
 590         FILE *f;\r
 591 \r
 592         ext[0] = 0;\r
 593         if(state_slot > 0 && state_slot < 10) sprintf(ext, ".%i", state_slot);\r
 594         strcat(ext, ".mds");\r
 595         if(currentConfig.EmuOpt & 8) strcat(ext, ".gz");\r
 596 \r
 597         romfname_ext(saveFname, ext);\r
 598         if ((f = fopen(saveFname, "rb"))) {\r
 599                 fclose(f);\r
 600                 return 1;\r
 601         }\r
 602         return 0;\r
 603 }\r
 604 \r
 605 static void RunEvents(unsigned int which)\r
 606 {\r
 607         if(which & 0x1800) { // save or load (but not both)\r
 608                 int do_it = 1;\r
 609                 if (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200) && check_save_file()) {\r
 610                         unsigned long keys;\r
 611                         blit("", "OVERWRITE SAVE? (Y=yes, X=no)");\r
 612                         while( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 613                                 usleep(50*1024);\r
 614                         if (keys & GP2X_X) do_it = 0;\r
 615                         clearArea(0);\r
 616                 }\r
 617                 if (do_it) {\r
 618                         blit("", (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 619                         emu_SaveLoadGame(which & 0x1000, 0);\r
 620                 }\r
 621 \r
 622                 reset_timing = 1;\r
 623         }\r
 624         if(which & 0x0400) { // switch renderer\r
 625                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 626                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 627                 else   currentConfig.EmuOpt &= ~0x80;\r
 628 \r
 629                 vidResetMode();\r
 630 \r
 631                 if (PicoOpt&0x10) {\r
 632                         strcpy(noticeMsg, " 8bit fast renderer");\r
 633                 } else if (currentConfig.EmuOpt&0x80) {\r
 634                         strcpy(noticeMsg, "16bit accurate renderer");\r
 635                 } else {\r
 636                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 637                 }\r
 638 \r
 639                 gettimeofday(&noticeMsgTime, 0);\r
 640         }\r
 641         if(which & 0x0300) {\r
 642                 if(which&0x0200) {\r
 643                         state_slot -= 1;\r
 644                         if(state_slot < 0) state_slot = 9;\r
 645                 } else {\r
 646                         state_slot += 1;\r
 647                         if(state_slot > 9) state_slot = 0;\r
 648                 }\r
 649                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, check_save_file() ? "USED" : "FREE");\r
 650                 gettimeofday(&noticeMsgTime, 0);\r
 651         }\r
 652         if(which & 0x0080) {\r
 653                 engineState = PGS_Menu;\r
 654         }\r
 655 }\r
 656 \r
 657 \r
 658 static void updateKeys(void)\r
 659 {\r
 660         unsigned long keys, allActions[2] = { 0, 0 }, events;\r
 661         static unsigned long prevEvents = 0;\r
 662         int joy, i;\r
 663 \r
 664         keys = gp2x_joystick_read(0);\r
 665         if (keys & GP2X_SELECT) {\r
 666                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 667                 // wait until select is released, so menu would not resume game\r
 668                 while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);\r
 669         }\r
 670 \r
 671         keys &= CONFIGURABLE_KEYS;\r
 672 \r
 673         for (i = 0; i < 32; i++)\r
 674         {\r
 675                 if (keys & (1 << i)) {\r
 676                         int pl, acts = currentConfig.KeyBinds[i];\r
 677                         if (!acts) continue;\r
 678                         pl = (acts >> 16) & 1;\r
 679                         if (combo_keys & (1 << i)) {\r
 680                                 int u = i+1, acts_c = acts & combo_acts;\r
 681                                 // let's try to find the other one\r
 682                                 if (acts_c)\r
 683                                         for (; u < 32; u++)\r
 684                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {\r
 685                                                         allActions[pl] |= acts_c;\r
 686                                                         keys &= ~((1 << i) | (1 << u));\r
 687                                                         break;\r
 688                                                 }\r
 689                                 // add non-combo actions if combo ones were not found\r
 690                                 if (!acts_c || u == 32)\r
 691                                         allActions[pl] |= acts & ~combo_acts;\r
 692                         } else {\r
 693                                 allActions[pl] |= acts;\r
 694                         }\r
 695                 }\r
 696         }\r
 697 \r
 698         // add joy inputs\r
 699         if (num_of_joys > 0)\r
 700         {\r
 701                 gp2x_usbjoy_update();\r
 702                 for (joy = 0; joy < num_of_joys; joy++) {\r
 703                         int keys = gp2x_usbjoy_check2(joy);\r
 704                         for (i = 0; i < 32; i++) {\r
 705                                 if (keys & (1 << i)) {\r
 706                                         int acts = currentConfig.JoyBinds[joy][i];\r
 707                                         int pl = (acts >> 16) & 1;\r
 708                                         allActions[pl] |= acts;\r
 709                                 }\r
 710                         }\r
 711                 }\r
 712         }\r
 713 \r
 714         if(movie_data)\r
 715         {\r
 716                 int offs = frame_count*3 + 0x40;\r
 717                 if (offs+3 > movie_size) {\r
 718                         free(movie_data);\r
 719                         movie_data = 0;\r
 720                         strcpy(noticeMsg, "END OF MOVIE.");\r
 721                         printf("END OF MOVIE.\n");\r
 722                         gettimeofday(&noticeMsgTime, 0);\r
 723                 } else {\r
 724                         // MXYZ SACB RLDU\r
 725                         PicoPad[0] = ~movie_data[offs]   & 0x8f; // ! SCBA RLDU\r
 726                         if(!(movie_data[offs]   & 0x10)) PicoPad[0] |= 0x40; // A\r
 727                         if(!(movie_data[offs]   & 0x20)) PicoPad[0] |= 0x10; // B\r
 728                         if(!(movie_data[offs]   & 0x40)) PicoPad[0] |= 0x20; // A\r
 729                         PicoPad[1] = ~movie_data[offs+1] & 0x8f; // ! SCBA RLDU\r
 730                         if(!(movie_data[offs+1] & 0x10)) PicoPad[1] |= 0x40; // A\r
 731                         if(!(movie_data[offs+1] & 0x20)) PicoPad[1] |= 0x10; // B\r
 732                         if(!(movie_data[offs+1] & 0x40)) PicoPad[1] |= 0x20; // A\r
 733                         PicoPad[0] |= (~movie_data[offs+2] & 0x0A) << 8; // ! MZYX\r
 734                         if(!(movie_data[offs+2] & 0x01)) PicoPad[0] |= 0x0400; // X\r
 735                         if(!(movie_data[offs+2] & 0x04)) PicoPad[0] |= 0x0100; // Z\r
 736                         PicoPad[1] |= (~movie_data[offs+2] & 0xA0) << 4; // ! MZYX\r
 737                         if(!(movie_data[offs+2] & 0x10)) PicoPad[1] |= 0x0400; // X\r
 738                         if(!(movie_data[offs+2] & 0x40)) PicoPad[1] |= 0x0100; // Z\r
 739                         if ((PicoPad[0] & 0x80) || (PicoPad[1] & 0x80))\r
 740                                 printf("%d: start\n", frame_count);\r
 741                 }\r
 742         }\r
 743         else\r
 744         {\r
 745                 PicoPad[0] = (unsigned short) allActions[0];\r
 746                 PicoPad[1] = (unsigned short) allActions[1];\r
 747         }\r
 748         frame_count++;\r
 749 \r
 750         events = (allActions[0] | allActions[1]) >> 16;\r
 751 \r
 752         // volume is treated in special way and triggered every frame\r
 753         if(events & 0x6000) {\r
 754                 int vol = currentConfig.volume;\r
 755                 if (events & 0x2000) {\r
 756                         if (vol < 90) vol++;\r
 757                 } else {\r
 758                         if (vol >  0) vol--;\r
 759                 }\r
 760                 gp2x_sound_volume(vol, vol);\r
 761                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 762                 gettimeofday(&noticeMsgTime, 0);\r
 763                 currentConfig.volume = vol;\r
 764         }\r
 765 \r
 766         events &= ~prevEvents;\r
 767         if (events) RunEvents(events);\r
 768 \r
 769         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 770 }\r
 771 \r
 772 static int snd_excess_add = 0, snd_excess_cnt = 0; // hack\r
 773 \r
 774 static void updateSound(void)\r
 775 {\r
 776         int len = (PicoOpt&8)?PsndLen*2:PsndLen;\r
 777 \r
 778         snd_excess_cnt += snd_excess_add;\r
 779         if (snd_excess_cnt >= 0x10000) {\r
 780                 snd_excess_cnt -= 0x10000;\r
 781                 if (PicoOpt&8) {\r
 782                         PsndOut[len]   = PsndOut[len-2];\r
 783                         PsndOut[len+1] = PsndOut[len-1];\r
 784                         len+=2;\r
 785                 } else {\r
 786                         PsndOut[len]   = PsndOut[len-1];\r
 787                         len++;\r
 788                 }\r
 789         }\r
 790 \r
 791         gp2x_sound_write(PsndOut, len<<1);\r
 792 }\r
 793 \r
 794 \r
 795 static void SkipFrame(int do_sound)\r
 796 {\r
 797         void *sndbuff_tmp = 0;\r
 798         if (PsndOut && !do_sound) {\r
 799                 sndbuff_tmp = PsndOut;\r
 800                 PsndOut = 0;\r
 801         }\r
 802 \r
 803         PicoSkipFrame=1;\r
 804         PicoFrame();\r
 805         PicoSkipFrame=0;\r
 806 \r
 807         if (sndbuff_tmp && !do_sound) {\r
 808                 PsndOut = sndbuff_tmp;\r
 809         }\r
 810 }\r
 811 \r
 812 \r
 813 static void simpleWait(int thissec, int lim_time)\r
 814 {\r
 815         struct timeval tval;\r
 816 \r
 817         spend_cycles(1024);\r
 818         gettimeofday(&tval, 0);\r
 819         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 820 \r
 821         while(tval.tv_usec < lim_time)\r
 822         {\r
 823                 spend_cycles(1024);\r
 824                 gettimeofday(&tval, 0);\r
 825                 if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 826         }\r
 827 }\r
 828 \r
 829 \r
 830 void emu_Loop(void)\r
 831 {\r
 832         static int gp2x_old_clock = 200;\r
 833         static int PsndRate_old = 0, PicoOpt_old = 0, PsndLen_real = 0, pal_old = 0;\r
 834         char fpsbuff[24]; // fps count c string\r
 835         struct timeval tval; // timing\r
 836         int thissec = 0, frames_done = 0, frames_shown = 0, oldmodes = 0;\r
 837         int target_fps, target_frametime, lim_time, i;\r
 838         char *notice = 0;\r
 839 \r
 840         printf("entered emu_Loop()\n");\r
 841 \r
 842         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 843                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 844                 set_FCLK(currentConfig.CPUclock);\r
 845                 gp2x_old_clock = currentConfig.CPUclock;\r
 846                 printf(" done\n");\r
 847         }\r
 848 \r
 849         if (gp2x_old_gamma != currentConfig.gamma) {\r
 850                 set_gamma(currentConfig.gamma);\r
 851                 gp2x_old_gamma = currentConfig.gamma;\r
 852                 printf("updated gamma to %i\n", currentConfig.gamma);\r
 853         }\r
 854 \r
 855         fpsbuff[0] = 0;\r
 856 \r
 857         // make sure we are in correct mode\r
 858         vidResetMode();\r
 859         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 860         find_combos();\r
 861 \r
 862         // pal/ntsc might have changed, reset related stuff\r
 863         target_fps = Pico.m.pal ? 50 : 60;\r
 864         target_frametime = 1000000/target_fps;\r
 865         reset_timing = 1;\r
 866 \r
 867         // prepare sound stuff\r
 868         if(currentConfig.EmuOpt & 4) {\r
 869                 if(PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old || crashed_940) {\r
 870                         /* if 940 is turned off, we need it to be put back to sleep */\r
 871                         if (!(PicoOpt&0x200) && ((PicoOpt^PicoOpt_old)&0x200)) {\r
 872                                 Reset940(1);\r
 873                                 Pause940(1);\r
 874                         }\r
 875                         sound_rerate();\r
 876                 }\r
 877                 //excess_samples = PsndRate - PsndLen*target_fps;\r
 878                 snd_excess_cnt = 0;\r
 879                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 880                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n", PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 881                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);\r
 882                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);\r
 883                 PicoWriteSound = updateSound;\r
 884                 PsndOut = calloc((PicoOpt&8) ? (PsndLen*4+4) : (PsndLen*2+2), 1);\r
 885                 PsndRate_old = PsndRate;\r
 886                 PsndLen_real = PsndLen;\r
 887                 PicoOpt_old  = PicoOpt;\r
 888                 pal_old = Pico.m.pal;\r
 889         } else {\r
 890                 PsndOut = 0;\r
 891         }\r
 892 \r
 893         // loop?\r
 894         while (engineState == PGS_Running)\r
 895         {\r
 896                 int modes;\r
 897 \r
 898                 gettimeofday(&tval, 0);\r
 899                 if(reset_timing) {\r
 900                         reset_timing = 0;\r
 901                         thissec = tval.tv_sec;\r
 902                         frames_shown = frames_done = tval.tv_usec/target_frametime;\r
 903                 }\r
 904 \r
 905                 // show notice message?\r
 906                 if(noticeMsgTime.tv_sec) {\r
 907                         static int noticeMsgSum;\r
 908                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 909                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 910                                 clearArea(0);\r
 911                                 notice = 0;\r
 912                         } else {\r
 913                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 914                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 915                                 notice = noticeMsg;\r
 916                         }\r
 917                 }\r
 918 \r
 919                 // check for mode changes\r
 920                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 921                 if (modes != oldmodes) {\r
 922                         int scalex = 320;\r
 923                         osd_fps_x = OSD_FPS_X;\r
 924                         if (modes & 4) {\r
 925                                 vidCpyM2 = vidCpyM2_40col;\r
 926                         } else {\r
 927                                 if (PicoOpt & 0x100) {\r
 928                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 929                                         scalex = 256;\r
 930                                         osd_fps_x = OSD_FPS_X - 64;\r
 931                                 } else {\r
 932                                         vidCpyM2 = vidCpyM2_32col;\r
 933                                 }\r
 934                         }\r
 935                         gp2x_video_RGB_setscaling(scalex, 240);\r
 936                         oldmodes = modes;\r
 937                         clearArea(1);\r
 938                 }\r
 939 \r
 940                 // second changed?\r
 941                 if(thissec != tval.tv_sec) {\r
 942 #ifdef BENCHMARK\r
 943                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 944                         if(++bench == 10) {\r
 945                                 bench = 0;\r
 946                                 bench_fps_s = bench_fps;\r
 947                                 bf[bfp++ & 3] = bench_fps;\r
 948                                 bench_fps = 0;\r
 949                         }\r
 950                         bench_fps += frames_shown;\r
 951                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 952 #else\r
 953                         if(currentConfig.EmuOpt & 2)\r
 954                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 955 #endif\r
 956                         thissec = tval.tv_sec;\r
 957 \r
 958                         if(PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 959                                 frames_done = frames_shown = 0;\r
 960                         } else {\r
 961                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 962                                 // when second changes, but we don't want buffer to starve.\r
 963                                 if(PsndOut && frames_done < target_fps && frames_done > target_fps-5) {\r
 964                                         updateKeys();\r
 965                                         SkipFrame(1); frames_done++;\r
 966                                 }\r
 967 \r
 968                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;\r
 969                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;\r
 970                                 if (frames_shown > frames_done) frames_shown = frames_done;\r
 971                         }\r
 972                 }\r
 973 \r
 974                 lim_time = (frames_done+1) * target_frametime;\r
 975                 if(currentConfig.Frameskip >= 0) { // frameskip enabled\r
 976                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 977                                 updateKeys();\r
 978                                 SkipFrame(1); frames_done++;\r
 979                                 if (PsndOut) { // do framelimitting if sound is enabled\r
 980                                         gettimeofday(&tval, 0);\r
 981                                         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 982                                         if(tval.tv_usec < lim_time) { // we are too fast\r
 983                                                 simpleWait(thissec, lim_time);\r
 984                                         }\r
 985                                 }\r
 986                                 lim_time += target_frametime;\r
 987                         }\r
 988                 } else if(tval.tv_usec > lim_time) { // auto frameskip\r
 989                         // no time left for this frame - skip\r
 990                         updateKeys();\r
 991                         SkipFrame(tval.tv_usec < lim_time+target_frametime); frames_done++;\r
 992                         continue;\r
 993                 }\r
 994 \r
 995                 updateKeys();\r
 996                 PicoFrame();\r
 997 \r
 998 #if 0\r
 999                 // debug\r
1000                 {\r
1001                         static unsigned char oldscr[320*240*2];\r
1002                         FILE *f; char name[128]; int i;\r
1003                         for (i = 0; i < 320*240*2; i++)\r
1004                                 if(oldscr[i] != ((unsigned char *)gp2x_screen)[i]) break;\r
1005                         if (i < 320*240*2)\r
1006                         {\r
1007                                 for (i = 0; i < 320*240*2; i++)\r
1008                                         oldscr[i] = ((unsigned char *)gp2x_screen)[i];\r
1009                                 sprintf(name, "%05i.raw", frame_count);\r
1010                                 f = fopen(name, "wb");\r
1011                                 if (!f) { printf("!f\n"); exit(1); }\r
1012                                 fwrite(gp2x_screen, 1, 320*240*2, f);\r
1013                                 fclose(f);\r
1014                         }\r
1015                 }\r
1016 #endif\r
1017 \r
1018                 // check time\r
1019                 gettimeofday(&tval, 0);\r
1020                 if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
1021 \r
1022                 // sleep if we are still too fast\r
1023                 if(PsndOut != 0 || currentConfig.Frameskip < 0)\r
1024                 {\r
1025                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
1026                         gettimeofday(&tval, 0);\r
1027                         if(thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
1028                         if(tval.tv_usec < lim_time)\r
1029                         {\r
1030                                 // we are too fast\r
1031                                 simpleWait(thissec, lim_time);\r
1032                         }\r
1033                 }\r
1034 \r
1035                 blit(fpsbuff, notice);\r
1036 \r
1037                 frames_done++; frames_shown++;\r
1038         }\r
1039 \r
1040         // save SRAM\r
1041         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
1042                 emu_SaveLoadGame(0, 1);\r
1043                 SRam.changed = 0;\r
1044         }\r
1045 \r
1046         if (PsndOut != 0) {\r
1047                 free(PsndOut);\r
1048                 PsndOut = 0;\r
1049         }\r
1050 }\r
1051 \r
1052 \r
1053 void emu_ResetGame(void)\r
1054 {\r
1055         PicoReset(0);\r
1056         reset_timing = 1;\r
1057 }\r
1058 \r
1059 \r
1060 size_t gzRead2(void *p, size_t _size, size_t _n, void *file)\r
1061 {\r
1062         return gzread(file, p, _n);\r
1063 }\r
1064 \r
1065 \r
1066 size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)\r
1067 {\r
1068         return gzwrite(file, p, _n);\r
1069 }\r
1070 \r
1071 typedef unsigned int (*STATE_SL_FUNC)(void *, unsigned int, unsigned int, void *);\r
1072 \r
1073 int emu_SaveLoadGame(int load, int sram)\r
1074 {\r
1075         int ret = 0;\r
1076         char saveFname[512];\r
1077 \r
1078         // make save filename\r
1079         romfname_ext(saveFname, "");\r
1080         if(sram) strcat(saveFname, ".srm");\r
1081         else {\r
1082                 if(state_slot > 0 && state_slot < 10) sprintf(saveFname, "%s.%i", saveFname, state_slot);\r
1083                 strcat(saveFname, ".mds");\r
1084         }\r
1085 \r
1086         printf("saveLoad (%i, %i): %s\n", load, sram, saveFname);\r
1087 \r
1088         if(sram) {\r
1089                 FILE *sramFile;\r
1090                 int sram_size = SRam.end-SRam.start+1;\r
1091                 if(SRam.reg_back & 4) sram_size=0x2000;\r
1092                 if(!SRam.data) return 0; // SRam forcefully disabled for this game\r
1093                 if(load) {\r
1094                         sramFile = fopen(saveFname, "rb");\r
1095                         if(!sramFile) return -1;\r
1096                         fread(SRam.data, 1, sram_size, sramFile);\r
1097                         fclose(sramFile);\r
1098                 } else {\r
1099                         // sram save needs some special processing\r
1100                         // see if we have anything to save\r
1101                         for(; sram_size > 0; sram_size--)\r
1102                                 if(SRam.data[sram_size-1]) break;\r
1103 \r
1104                         if(sram_size) {\r
1105                                 sramFile = fopen(saveFname, "wb");\r
1106                                 ret = fwrite(SRam.data, 1, sram_size, sramFile);\r
1107                                 ret = (ret != sram_size) ? -1 : 0;\r
1108                                 fclose(sramFile);\r
1109                                 sync();\r
1110                         }\r
1111                 }\r
1112                 return ret;\r
1113         } else {\r
1114                 void *PmovFile = NULL;\r
1115                 // try gzip first\r
1116                 if(currentConfig.EmuOpt & 8) {\r
1117                         strcat(saveFname, ".gz");\r
1118                         if( (PmovFile = gzopen(saveFname, load ? "rb" : "wb")) ) {\r
1119                                 areaRead  = gzRead2;\r
1120                                 areaWrite = gzWrite2;\r
1121                                 if(!load) gzsetparams(PmovFile, 9, Z_DEFAULT_STRATEGY);\r
1122                         } else\r
1123                                 saveFname[strlen(saveFname)-3] = 0;\r
1124                 }\r
1125                 if(!PmovFile) { // gzip failed or was disabled\r
1126                         if( (PmovFile = fopen(saveFname, load ? "rb" : "wb")) ) {\r
1127                                 areaRead  = (STATE_SL_FUNC) fread;\r
1128                                 areaWrite = (STATE_SL_FUNC) fwrite;\r
1129                         }\r
1130                 }\r
1131                 if(PmovFile) {\r
1132                         PmovState(load ? 6 : 5, PmovFile);\r
1133                         strcpy(noticeMsg, load ? "GAME LOADED  " : "GAME SAVED   ");\r
1134                         if(areaRead == gzRead2)\r
1135                                  gzclose(PmovFile);\r
1136                         else fclose ((FILE *) PmovFile);\r
1137                         PmovFile = 0;\r
1138                         if (!load) sync();\r
1139                         else Pico.m.dirtyPal=1;\r
1140                 } else {\r
1141                         strcpy(noticeMsg, load ? "LOAD FAILED  " : "SAVE FAILED  ");\r
1142                         ret = -1;\r
1143                 }\r
1144 \r
1145                 gettimeofday(&noticeMsgTime, 0);\r
1146                 return ret;\r
1147         }\r
1148 }\r