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 // Added by SDLEMU (http://sdlemu.ngemu.com)
  10 // Added for GCC UNIX compatibility
  11 #ifdef __GCCUNIX__
  12 #include <unistd.h>
  13 #endif  // __GCCUNIX__
  14
  15 #include <time.h>
  16 #include <SDL.h>
  17 #include "SDLptc.h"
  18 #include "jaguar.h"
  19 #include "crc32.h"
  20 #include "unzip.h"
  21
  22 // Uncomment this for speed control
  23 //#define SPEED_CONTROL
  24
  25 //
  26 // Private function prototypes
  27 //
  28
  29 uint32 JaguarLoadROM(uint8 *, char *);
  30 void JaguarLoadCart(uint8 *, char *);
  31
  32 //
  33 // Various paths
  34 //
  35
  36 //static char  *jaguar_bootRom_path="c:/jaguarEmu/newload.img";
  37 static char * jaguar_bootRom_path = "./bios/jagboot.rom";
  38 //static char  *jaguar_bootRom_path="./bios/JagOS.bin";
  39 char * jaguar_eeproms_path = "./eeproms/";
  40 char jaguar_boot_dir[1024];
  41 //static char romLoadDialog_filePath[1024];
  42
  43
  44 Console console;
  45 Surface * surface;
  46 Format format(16, 0x007C00, 0x00003E0, 0x0000001F);
  47 bool finished = false;
  48 bool fullscreen = false;
  49 bool hardwareTypeNTSC = true;                   // Set to false for PAL
  50
  51 //
  52 // External variables
  53 //
  54
  55 extern bool jaguar_use_bios;
  56 extern bool dsp_enabled;
  57 extern uint8 * jaguar_mainRam;
  58 extern uint8 * jaguar_bootRom;
  59 extern uint8 * jaguar_mainRom;
  60
  61
  62 void main_screen_switch(void)
  63 {
  64         fullscreen = !fullscreen;
  65         if (fullscreen)
  66                 console.option("fullscreen output");
  67         else
  68                 console.option("windowed output");
  69         console.close();
  70         console.open("Virtual Jaguar", tom_width, tom_height, format);
  71 }
  72
  73 // Added/changed by SDLEMU http://sdlemu.ngemu.com
  74
  75 int main(int argc, char * argv[])
  76 {
  77         uint32 startTime, totalFrames;//, endTime;//, w, h;
  78 //      int32 * vs;
  79         uint32 nNormalLast = 0;
  80         int32 nNormalFrac = 0;
  81 //      int32 i = 0;
  82 //unused        int32 nTime = 0;
  83 //unused        int32 nCount = 0;
  84     int32 nFrameskip = 0;                                                               // Default: Show every frame
  85     int32 nFrame = 0;                                                                   // No. of Frame
  86     int32 nJoyport = 0;                                                                 // Joystick port
  87
  88         printf("Virtual Jaguar/SDL v1.0.4 (GCC/SDL Port)\n");
  89         printf("Based upon Virtual Jaguar core v1.0.0 by cal2 of Potato emulation.\n");
  90         printf("Written by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)\n");
  91         printf("Portions massaged by James L. Hammons (WIN32)\n");
  92         printf("Contact: http://sdlemu.ngemu.com/ | sdlemu@ngemu.com\n");
  93
  94     console.option("windowed output");
  95
  96         // BIOS is now ON by default--use the -nobios switch to turn it off!
  97         jaguar_use_bios = true;
  98         bool haveCart = false;                                                                  // Assume there is no cartridge...!
  99
 100         // Checking the switches ;)
 101
 102         for(int i=1; i<argc || argv[i]!=NULL; i++)
 103         {
 104                 // This would be the most likely place to do the cart loading...
 105                 if (argv[i][0] != '-')
 106                         haveCart = true;                                                                // It looks like we have a cartridge!
 107
 108                 if (!strcmp(argv[i], "-fullscreen"))
 109                 {
 110                         fullscreen = true;
 111                         console.option("fullscreen output");
 112                 }
 113
 114                 if (!strcmp(argv[i], "-window"))
 115                         console.option("windowed output");
 116
 117                 if (!strcmp(argv[i], "-joystick"))
 118                         console.option("joystick enabled");
 119
 120                 if (!strcmp(argv[i], "-joyport"))
 121                 {
 122                         nJoyport = atoi(argv[++i]) + 1;
 123                         if (nJoyport > 3)
 124                                 nJoyport = 3;
 125                 }
 126
 127                 if (!strcmp(argv[i], "-frameskip"))
 128                 {
 129                         nFrameskip = atoi(argv[++i]) + 1;
 130                         if (nFrameskip > 10)
 131                                 nFrameskip = 10;
 132 #ifdef SPEED_CONTROL
 133                         nFrameskip = 0;
 134 #endif
 135                 }
 136
 137                 if (!strcmp(argv[i], "-nobios"))
 138                         jaguar_use_bios = false;
 139
 140                 if (!strcmp(argv[i], "-dspon"))
 141                         dsp_enabled = 1;
 142
 143                 if (!strcmp(argv[i], "-pal"))
 144                         hardwareTypeNTSC = false;
 145
 146                 if (!strcmp(argv[i], "-help") || !strcmp(argv[i], "-?"))
 147                 {
 148                     printf("Usage: \n\n");
 149                         printf("vj [romfile] [switches]\n");
 150                         printf("  -? or -help     : Display usage and switches              \n");
 151                         printf("  -fullscreen     : Enable fullscreen mode                  \n");
 152                         printf("  -window         : Enable windowed mode (default)          \n");
 153                         printf("  -frameskip 1-10 : Enable frameskip 1 (default) - 10       \n");
 154                         printf("  -joystick       : Enable joystick/gamepad                 \n");
 155                         printf("  -joyport   0-3  : Select desired joystick port            \n");
 156                         printf("  -nobios         : Boot cart without using Jaguar BIOS ROM \n");
 157                         printf("  -dspon          : Force VJ to use the DSP                 \n");
 158                         printf("  -pal            : Force VJ to PAL mode (default is NTSC)  \n");
 159                         printf("\nInvoking Virtual Jagaur with no ROM file will cause it to boot up\n");
 160                         printf("with the Jaguar BIOS.\n");
 161                         return true;
 162                 }
 163     }
 164
 165         getcwd(jaguar_boot_dir, 1024);
 166         log_init("vj.log");
 167         memory_init();
 168         version_init();
 169         version_display(log_get());
 170         jaguar_init();
 171
 172         // Get the BIOS ROM
 173         if (jaguar_use_bios)
 174                 JaguarLoadROM(jaguar_bootRom, jaguar_bootRom_path);
 175
 176         SET32(jaguar_mainRam, 0, 0x00200000);                   // Set top of stack...
 177
 178         // Get the cartridge ROM (if passed in)
 179         if (haveCart)
 180         {
 181                 JaguarLoadCart(jaguar_mainRom, argv[1]);
 182                 eeprom_init();
 183         }
 184
 185         jaguar_reset();
 186
 187         // Setting up the backbuffer
 188         int16 * backbuffer = (int16 *)malloc(845 * 525 * sizeof(int16));
 189         memset(backbuffer, 0xAA, tom_getVideoModeWidth() * tom_getVideoModeHeight() * sizeof(int16));
 190
 191         // Setting up the primary SDL display
 192         surface = new Surface(tom_getVideoModeWidth(), tom_getVideoModeHeight(), format);
 193
 194         // Initialize Joystick support under SDL
 195         if (console.JoyEnabled() == 1)
 196         {
 197                 if (SDL_NumJoysticks() <= 0)
 198                 {
 199                 console.option("joystick disabled");
 200                         printf("No joystick(s) or joypad(s) detected on your system. Using keyboard...\n");
 201                 }
 202                 else
 203                 {
 204                         if ((console.joystick = SDL_JoystickOpen(nJoyport)) == 0)
 205                         {
 206                                 console.option("joystick disabled");
 207                                 printf("Unable to open a Joystick on port: %d\n", (int)nJoyport);
 208                         }
 209                         else
 210                                 printf("Using: %s\n", SDL_JoystickName(nJoyport));
 211                 }
 212         }
 213
 214         // Open the display and start emulating some 3l337 Atari Jaguar games :P
 215         console.open("Virtual Jaguar", tom_getVideoModeWidth(), tom_getVideoModeHeight(), format);
 216
 217         totalFrames = 0;
 218         startTime = clock();
 219         nNormalLast = 0;                                                                        // Last value of timeGetTime()
 220         nNormalFrac = 0;                                                                        // Extra fraction we did
 221         nNormalLast = SDL_GetTicks();                                           //timeGetTime();
 222
 223         while (!finished)
 224         {
 225 #ifdef SPEED_CONTROL
 226                 nTime = SDL_GetTicks() - nNormalLast;                   // calcule le temps écoulé depuis le dernier affichage
 227                                                                                                                 // nTime est en mili-secondes.
 228                 // détermine le nombre de trames à passer + 1
 229                 nCount = (nTime * 600 - nNormalFrac) / 10000;
 230
 231                 // si le nombre de trames à passer + 1 est nul ou négatif,
 232                 // ne rien faire pendant 2 ms
 233                 if (nCount <= 0)
 234                 {
 235                         //Sleep(2);
 236                         //SDL_Delay(1);
 237                 } // No need to do anything for a bit
 238                 else
 239                 {
 240                         nNormalFrac += nCount * 10000;                          //
 241                         nNormalLast += nNormalFrac / 600;                       // add the duration of nNormalFrac frames
 242                         nNormalFrac %= 600;                                                     //
 243
 244                         // Pas plus de 9 (10-1) trames non affichées
 245                         if (nCount > 10)
 246                                 nCount = 10;
 247                         for(int i=0; i<nCount-1; i++)
 248                                 jaguar_exec(backbuffer, false);
 249 #endif
 250             // Setting up new backbuffer with new pixels and data
 251                         jaguar_exec(backbuffer, true);
 252                         totalFrames++;
 253
 254                         // Simple frameskip
 255                         if (nFrame == nFrameskip)
 256                         {
 257                                 int32 * vs = (int32 *)surface->lock();
 258                                 memcpy(vs, backbuffer, tom_width * tom_height * 2);
 259                                 surface->unlock();
 260                                 surface->copy(console);
 261                                 console.update();
 262                                 nFrame = 0;
 263                         }
 264                         else
 265                                 nFrame++;
 266
 267                         joystick_exec();
 268
 269 #ifdef SPEED_CONTROL
 270                 }
 271 #endif
 272         }
 273
 274         int elapsedTime = clock() - startTime;
 275         int fps = (1000 * totalFrames) / elapsedTime;
 276         fprintf(log_get(), "Statistics: %i FPS\n", fps);
 277
 278         if (console.JoyEnabled() == 1) {}
 279
 280         jaguar_done();
 281         version_done();
 282         memory_done();
 283         log_done();
 284         console.close();                                                                        // Close SDL items as last!
 285
 286     return 0;
 287 }
 288
 289 //
 290 // Generic ROM loading
 291 //
 292 uint32 JaguarLoadROM(uint8 * rom, char * path)
 293 {
 294         uint32 romSize;
 295
 296         WriteLog("JagEm: Loading %s...", path);
 297
 298         char * ext = strrchr(path, '.');
 299         if (strcmpi(ext, ".zip") == 0)
 300         {
 301                 // Handle ZIP file loading here...
 302                 WriteLog("(ZIPped)...");
 303
 304                 if (load_zipped_file(0, 0, path, NULL, &rom, &romSize) == -1)
 305                 {
 306                         WriteLog("Failed!\n");
 307                         log_done();
 308                         exit(0);
 309                 }
 310         }
 311         else
 312         {
 313                 FILE * fp = fopen(path, "rb");
 314
 315                 if (fp == NULL)
 316                 {
 317                         WriteLog("Failed!\n");
 318                         log_done();
 319                         exit(0);
 320                 }
 321
 322                 fseek(fp, 0, SEEK_END);
 323                 romSize = ftell(fp);
 324                 fseek(fp, 0, SEEK_SET);
 325                 fread(rom, 1, romSize, fp);
 326                 fclose(fp);
 327         }
 328
 329         WriteLog("OK (%i bytes)\n", romSize);
 330         return romSize;
 331 }
 332
 333 //
 334 // Jaguar cartridge ROM loading
 335 //
 336 void JaguarLoadCart(uint8 * mem, char * path)
 337 {
 338         uint32 romsize = JaguarLoadROM(mem, path);
 339         jaguar_mainRom_crc32 = crc32_calcCheckSum(jaguar_mainRom, romsize);
 340         WriteLog( "CRC: %08X\n", (unsigned int)jaguar_mainRom_crc32);
 341 }