Shamusworld >> Repos - virtualjaguar/blob - src/vj.cpp

   1 //
   2 // Virtual Jaguar Emulator
   3 //
   4 // by cal2
   5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
   6 // Cleanups/fixes by James L. Hammons
   7 //
   8
   9 //
  10 // Important info:
  11 //
  12 //                           NTSC       PAL
  13 // GPU/DSP/video clock rate  26.590906  26.593900
  14 // 68000 clock rate          13.295453  13.296950
  15 // (clock rates in MHz)
  16 //
  17
  18 // Added by SDLEMU (http://sdlemu.ngemu.com)
  19 // Added for GCC UNIX compatibility
  20 #ifdef __GCCUNIX__
  21 #include <unistd.h>
  22 #endif  // __GCCUNIX__
  23
  24 #include <time.h>
  25 #include <SDL.h>
  26 #include "SDLptc.h"
  27 #include "jaguar.h"
  28 #include "crc32.h"
  29 #include "unzip.h"
  30
  31 // Uncomment this for speed control
  32 //#define SPEED_CONTROL
  33
  34 //
  35 // Private function prototypes
  36 //
  37
  38 uint32 JaguarLoadROM(uint8 *, char *);
  39 void JaguarLoadCart(uint8 *, char *);
  40
  41 //
  42 // Various paths
  43 //
  44
  45 //static char  *jaguar_bootRom_path="c:/jaguarEmu/newload.img";
  46 static char * jaguar_bootRom_path = "./bios/jagboot.rom";
  47 //static char  *jaguar_bootRom_path="./bios/JagOS.bin";
  48 char * jaguar_eeproms_path = "./eeproms/";
  49 char jaguar_boot_dir[1024];
  50 //static char romLoadDialog_filePath[1024];
  51
  52
  53 Console console;
  54 Surface * surface;
  55 Format format(16, 0x007C00, 0x00003E0, 0x0000001F);
  56 bool finished = false;
  57 bool fullscreen = false;
  58 bool hardwareTypeNTSC = true;                   // Set to false for PAL
  59
  60 //
  61 // External variables
  62 //
  63
  64 extern bool jaguar_use_bios;
  65 extern bool dsp_enabled;
  66 extern uint8 * jaguar_mainRam;
  67 extern uint8 * jaguar_bootRom;
  68 extern uint8 * jaguar_mainRom;
  69
  70
  71 void main_screen_switch(void)
  72 {
  73         fullscreen = !fullscreen;
  74         if (fullscreen)
  75                 console.option("fullscreen output");
  76         else
  77                 console.option("windowed output");
  78         console.close();
  79         console.open("Virtual Jaguar", tom_width, tom_height, format);
  80 }
  81
  82 // Added/changed by SDLEMU http://sdlemu.ngemu.com
  83
  84 uint32 totalFrames;//so we can grab this from somewhere else...
  85 int main(int argc, char * argv[])
  86 {
  87         uint32 startTime;//, totalFrames;//, endTime;//, w, h;
  88 //      int32 * vs;
  89         uint32 nNormalLast = 0;
  90         int32 nNormalFrac = 0;
  91 //      int32 i = 0;
  92 //unused        int32 nTime = 0;
  93 //unused        int32 nCount = 0;
  94     int32 nFrameskip = 0;                                                               // Default: Show every frame
  95     int32 nFrame = 0;                                                                   // No. of Frame
  96     int32 nJoyport = 0;                                                                 // Joystick port
  97
  98         printf("Virtual Jaguar/SDL v1.0.5 (GCC/SDL Port)\n");
  99         printf("Based upon Virtual Jaguar core v1.0.0 by cal2 of Potato emulation.\n");
 100         printf("Written by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)\n");
 101         printf("Portions massaged by James L. Hammons (WIN32)\n");
 102         printf("Contact: http://sdlemu.ngemu.com/ | sdlemu@ngemu.com\n");
 103
 104     console.option("windowed output");
 105
 106         // BIOS is now ON by default--use the -nobios switch to turn it off!
 107         jaguar_use_bios = true;
 108         bool haveCart = false;                                                                  // Assume there is no cartridge...!
 109
 110         // Checking the switches ;)
 111
 112         for(int i=1; i<argc || argv[i]!=NULL; i++)
 113         {
 114                 // This would be the most likely place to do the cart loading...
 115                 if (argv[i][0] != '-')
 116                         haveCart = true;                                                                // It looks like we have a cartridge!
 117
 118                 if (!strcmp(argv[i], "-fullscreen"))
 119                 {
 120                         fullscreen = true;
 121                         console.option("fullscreen output");
 122                 }
 123
 124                 if (!strcmp(argv[i], "-window"))
 125                         console.option("windowed output");
 126
 127                 if (!strcmp(argv[i], "-joystick"))
 128                         console.option("joystick enabled");
 129
 130                 if (!strcmp(argv[i], "-joyport"))
 131                 {
 132                         nJoyport = atoi(argv[++i]) + 1;
 133                         if (nJoyport > 3)
 134                                 nJoyport = 3;
 135                 }
 136
 137                 if (!strcmp(argv[i], "-frameskip"))
 138                 {
 139                         nFrameskip = atoi(argv[++i]) + 1;
 140                         if (nFrameskip > 10)
 141                                 nFrameskip = 10;
 142 #ifdef SPEED_CONTROL
 143                         nFrameskip = 0;
 144 #endif
 145                 }
 146
 147                 if (!strcmp(argv[i], "-nobios"))
 148                         jaguar_use_bios = false;
 149
 150                 if (!strcmp(argv[i], "-dspon"))
 151                         dsp_enabled = 1;
 152
 153                 if (!strcmp(argv[i], "-pal"))
 154                         hardwareTypeNTSC = false;
 155
 156                 if (!strcmp(argv[i], "-help") || !strcmp(argv[i], "-?"))
 157                 {
 158                     printf("Usage: \n\n");
 159                         printf("vj [romfile] [switches]\n");
 160                         printf("  -? or -help     : Display usage and switches              \n");
 161                         printf("  -fullscreen     : Enable fullscreen mode                  \n");
 162                         printf("  -window         : Enable windowed mode (default)          \n");
 163                         printf("  -frameskip 1-10 : Enable frameskip 1 (default) - 10       \n");
 164                         printf("  -joystick       : Enable joystick/gamepad                 \n");
 165                         printf("  -joyport   0-3  : Select desired joystick port            \n");
 166                         printf("  -nobios         : Boot cart without using Jaguar BIOS ROM \n");
 167                         printf("  -dspon          : Force VJ to use the DSP                 \n");
 168                         printf("  -pal            : Force VJ to PAL mode (default is NTSC)  \n");
 169                         printf("\nInvoking Virtual Jagaur with no ROM file will cause it to boot up\n");
 170                         printf("with the Jaguar BIOS.\n");
 171                         return true;
 172                 }
 173     }
 174
 175         getcwd(jaguar_boot_dir, 1024);
 176         log_init("vj.log");
 177         memory_init();
 178         version_init();
 179         version_display(log_get());
 180         jaguar_init();
 181
 182         // Get the BIOS ROM
 183         if (jaguar_use_bios)
 184                 JaguarLoadROM(jaguar_bootRom, jaguar_bootRom_path);
 185
 186         SET32(jaguar_mainRam, 0, 0x00200000);                   // Set top of stack...
 187
 188         // Get the cartridge ROM (if passed in)
 189         if (haveCart)
 190         {
 191                 JaguarLoadCart(jaguar_mainRom, argv[1]);
 192                 eeprom_init();
 193         }
 194
 195         jaguar_reset();
 196
 197         // Setting up the backbuffer
 198         int16 * backbuffer = (int16 *)malloc(845 * 525 * sizeof(int16));
 199         memset(backbuffer, 0xAA, tom_getVideoModeWidth() * tom_getVideoModeHeight() * sizeof(int16));
 200
 201         // Setting up the primary SDL display
 202         surface = new Surface(tom_getVideoModeWidth(), tom_getVideoModeHeight(), format);
 203
 204         // Initialize Joystick support under SDL
 205         if (console.JoyEnabled() == 1)
 206         {
 207                 if (SDL_NumJoysticks() <= 0)
 208                 {
 209                 console.option("joystick disabled");
 210                         printf("No joystick(s) or joypad(s) detected on your system. Using keyboard...\n");
 211                 }
 212                 else
 213                 {
 214                         if ((console.joystick = SDL_JoystickOpen(nJoyport)) == 0)
 215                         {
 216                                 console.option("joystick disabled");
 217                                 printf("Unable to open a Joystick on port: %d\n", (int)nJoyport);
 218                         }
 219                         else
 220                                 printf("Using: %s\n", SDL_JoystickName(nJoyport));
 221                 }
 222         }
 223
 224         // Open the display and start emulating some 3l337 Atari Jaguar games :P
 225         console.open("Virtual Jaguar", tom_getVideoModeWidth(), tom_getVideoModeHeight(), format);
 226
 227         totalFrames = 0;
 228         startTime = clock();
 229         nNormalLast = 0;                                                                        // Last value of timeGetTime()
 230         nNormalFrac = 0;                                                                        // Extra fraction we did
 231         nNormalLast = SDL_GetTicks();                                           //timeGetTime();
 232
 233         while (!finished)
 234         {
 235 #ifdef SPEED_CONTROL
 236                 nTime = SDL_GetTicks() - nNormalLast;                   // calcule le temps écoulé depuis le dernier affichage
 237                                                                                                                 // nTime est en mili-secondes.
 238                 // détermine le nombre de trames à passer + 1
 239                 nCount = (nTime * 600 - nNormalFrac) / 10000;
 240
 241                 // si le nombre de trames à passer + 1 est nul ou négatif,
 242                 // ne rien faire pendant 2 ms
 243                 if (nCount <= 0)
 244                 {
 245                         //Sleep(2);
 246                         //SDL_Delay(1);
 247                 } // No need to do anything for a bit
 248                 else
 249                 {
 250                         nNormalFrac += nCount * 10000;                          //
 251                         nNormalLast += nNormalFrac / 600;                       // add the duration of nNormalFrac frames
 252                         nNormalFrac %= 600;                                                     //
 253
 254                         // Pas plus de 9 (10-1) trames non affichées
 255                         if (nCount > 10)
 256                                 nCount = 10;
 257                         for(int i=0; i<nCount-1; i++)
 258                                 jaguar_exec(backbuffer, false);
 259 #endif
 260             // Setting up new backbuffer with new pixels and data
 261 //                      jaguar_exec(backbuffer, true);
 262                         JaguarExecute(backbuffer, true);
 263                         totalFrames++;
 264
 265                         // Simple frameskip
 266                         if (nFrame == nFrameskip)
 267                         {
 268                                 int32 * vs = (int32 *)surface->lock();
 269                                 memcpy(vs, backbuffer, tom_width * tom_height * 2);
 270                                 surface->unlock();
 271                                 surface->copy(console);
 272                                 console.update();
 273                                 nFrame = 0;
 274                         }
 275                         else
 276                                 nFrame++;
 277
 278                         joystick_exec();
 279
 280 #ifdef SPEED_CONTROL
 281                 }
 282 #endif
 283         }
 284
 285         int elapsedTime = clock() - startTime;
 286         int fps = (1000 * totalFrames) / elapsedTime;
 287         fprintf(log_get(), "Statistics: %i FPS\n", fps);
 288
 289         if (console.JoyEnabled() == 1) {}
 290
 291         jaguar_done();
 292         version_done();
 293         memory_done();
 294         log_done();
 295         console.close();                                                                        // Close SDL items as last!
 296
 297     return 0;
 298 }
 299
 300 //
 301 // Generic ROM loading
 302 //
 303 uint32 JaguarLoadROM(uint8 * rom, char * path)
 304 {
 305         uint32 romSize;
 306
 307         WriteLog("JagEm: Loading %s...", path);
 308
 309         char * ext = strrchr(path, '.');
 310         if (strcmpi(ext, ".zip") == 0)
 311         {
 312                 // Handle ZIP file loading here...
 313                 WriteLog("(ZIPped)...");
 314
 315                 if (load_zipped_file(0, 0, path, NULL, &rom, &romSize) == -1)
 316                 {
 317                         WriteLog("Failed!\n");
 318                         log_done();
 319                         exit(0);
 320                 }
 321         }
 322         else
 323         {
 324                 FILE * fp = fopen(path, "rb");
 325
 326                 if (fp == NULL)
 327                 {
 328                         WriteLog("Failed!\n");
 329                         log_done();
 330                         exit(0);
 331                 }
 332
 333                 fseek(fp, 0, SEEK_END);
 334                 romSize = ftell(fp);
 335                 fseek(fp, 0, SEEK_SET);
 336                 fread(rom, 1, romSize, fp);
 337                 fclose(fp);
 338         }
 339
 340         WriteLog("OK (%i bytes)\n", romSize);
 341         return romSize;
 342 }
 343
 344 //
 345 // Jaguar cartridge ROM loading
 346 //
 347 void JaguarLoadCart(uint8 * mem, char * path)
 348 {
 349         uint32 romsize = JaguarLoadROM(mem, path);
 350         jaguar_mainRom_crc32 = crc32_calcCheckSum(jaguar_mainRom, romsize);
 351         WriteLog( "CRC: %08X\n", (unsigned int)jaguar_mainRom_crc32);
 352 }