platform/gp2x/emu.c

   1 // (c) Copyright 2006-2007 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 <sys/stat.h>\r
  10 #include <sys/types.h>\r
  11 #include <linux/limits.h>\r
  12 #include <ctype.h>\r
  13 #include <unistd.h>\r
  14 \r
  15 #include <stdarg.h>\r
  16 \r
  17 #include "emu.h"\r
  18 #include "gp2x.h"\r
  19 #include "menu.h"\r
  20 #include "../common/arm_utils.h"\r
  21 #include "../common/fonts.h"\r
  22 #include "../common/emu.h"\r
  23 #include "../common/config.h"\r
  24 #include "../common/input.h"\r
  25 #include "../linux/sndout_oss.h"\r
  26 #include "cpuctrl.h"\r
  27 #include "version.h"\r
  28 \r
  29 #include <pico/pico_int.h>\r
  30 #include <pico/patch.h>\r
  31 #include <pico/sound/mix.h>\r
  32 #include <zlib/zlib.h>\r
  33 \r
  34 //#define PFRAMES\r
  35 \r
  36 #ifdef BENCHMARK\r
  37 #define OSD_FPS_X 220\r
  38 #else\r
  39 #define OSD_FPS_X 260\r
  40 #endif\r
  41 \r
  42 \r
  43 int select_exits = 0;\r
  44 \r
  45 extern int crashed_940;\r
  46 \r
  47 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];\r
  48 static struct timeval noticeMsgTime = { 0, 0 }; // when started showing\r
  49 static int osd_fps_x;\r
  50 static int gp2x_old_gamma = 100;\r
  51 unsigned char *PicoDraw2FB = NULL;  // temporary buffer for alt renderer\r
  52 int reset_timing = 0;\r
  53 \r
  54 #define PICO_PEN_ADJUST_X 4\r
  55 #define PICO_PEN_ADJUST_Y 2\r
  56 static int pico_pen_x = 320/2, pico_pen_y = 240/2;\r
  57 \r
  58 static void emu_msg_cb(const char *msg);\r
  59 static void emu_msg_tray_open(void);\r
  60 \r
  61 \r
  62 void emu_noticeMsgUpdated(void)\r
  63 {\r
  64         gettimeofday(&noticeMsgTime, 0);\r
  65 }\r
  66 \r
  67 int emu_getMainDir(char *dst, int len)\r
  68 {\r
  69         extern char **g_argv;\r
  70         int j;\r
  71 \r
  72         strncpy(dst, g_argv[0], len);\r
  73         len -= 32; // reserve\r
  74         if (len < 0) len = 0;\r
  75         dst[len] = 0;\r
  76         for (j = strlen(dst); j > 0; j--)\r
  77                 if (dst[j] == '/') { dst[j+1] = 0; break; }\r
  78 \r
  79         return j + 1;\r
  80 }\r
  81 \r
  82 void emu_Init(void)\r
  83 {\r
  84         // make temp buffer for alt renderer\r
  85         PicoDraw2FB = malloc((8+320)*(8+240+8));\r
  86         if (!PicoDraw2FB)\r
  87         {\r
  88                 printf("PicoDraw2FB == 0\n");\r
  89         }\r
  90 \r
  91         // make dirs for saves, cfgs, etc.\r
  92         mkdir("mds", 0777);\r
  93         mkdir("srm", 0777);\r
  94         mkdir("brm", 0777);\r
  95         mkdir("cfg", 0777);\r
  96 \r
  97         PicoInit();\r
  98         PicoMessage = emu_msg_cb;\r
  99         PicoMCDopenTray = emu_msg_tray_open;\r
 100         PicoMCDcloseTray = menu_loop_tray;\r
 101 }\r
 102 \r
 103 \r
 104 static void scaling_update(void)\r
 105 {\r
 106         PicoOpt &= ~0x4100;\r
 107         switch (currentConfig.scaling) {\r
 108                 default: break; // off\r
 109                 case 1:  // hw hor\r
 110                 case 2:  PicoOpt |=  0x0100; break; // hw hor+vert\r
 111                 case 3:  PicoOpt |=  0x4000; break; // sw hor\r
 112         }\r
 113 }\r
 114 \r
 115 \r
 116 void emu_Deinit(void)\r
 117 {\r
 118         // save SRAM\r
 119         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 120                 emu_SaveLoadGame(0, 1);\r
 121                 SRam.changed = 0;\r
 122         }\r
 123 \r
 124         if (!(currentConfig.EmuOpt & EOPT_NO_AUTOSVCFG))\r
 125                 emu_writelrom();\r
 126 \r
 127         free(PicoDraw2FB);\r
 128 \r
 129         PicoExit();\r
 130 \r
 131         // restore gamma\r
 132         if (gp2x_old_gamma != 100)\r
 133                 set_gamma(100, 0);\r
 134 }\r
 135 \r
 136 void emu_prepareDefaultConfig(void)\r
 137 {\r
 138         memset(&defaultConfig, 0, sizeof(defaultConfig));\r
 139         defaultConfig.EmuOpt    = 0x9d | 0x00700; // | <- ram_tmng, confirm_save, cd_leds\r
 140         defaultConfig.s_PicoOpt = 0x0f | POPT_EXT_FM|POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES;\r
 141         defaultConfig.s_PsndRate = 44100;\r
 142         defaultConfig.s_PicoRegion = 0; // auto\r
 143         defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP\r
 144         defaultConfig.s_PicoCDBuffers = 0;\r
 145         defaultConfig.Frameskip = -1; // auto\r
 146         defaultConfig.CPUclock = 200;\r
 147         defaultConfig.volume = 50;\r
 148         defaultConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU\r
 149         defaultConfig.KeyBinds[ 4] = 1<<1;\r
 150         defaultConfig.KeyBinds[ 2] = 1<<2;\r
 151         defaultConfig.KeyBinds[ 6] = 1<<3;\r
 152         defaultConfig.KeyBinds[14] = 1<<4;\r
 153         defaultConfig.KeyBinds[13] = 1<<5;\r
 154         defaultConfig.KeyBinds[12] = 1<<6;\r
 155         defaultConfig.KeyBinds[ 8] = 1<<7;\r
 156         defaultConfig.KeyBinds[15] = 1<<26; // switch rend\r
 157         defaultConfig.KeyBinds[10] = 1<<27; // save state\r
 158         defaultConfig.KeyBinds[11] = 1<<28; // load state\r
 159         defaultConfig.KeyBinds[23] = 1<<29; // vol up\r
 160         defaultConfig.KeyBinds[22] = 1<<30; // vol down\r
 161         defaultConfig.gamma = 100;\r
 162         defaultConfig.scaling = 0;\r
 163         defaultConfig.turbo_rate = 15;\r
 164 }\r
 165 \r
 166 void osd_text(int x, int y, const char *text)\r
 167 {\r
 168         int len = strlen(text)*8;\r
 169         int *p, i, h, offs;\r
 170 \r
 171         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 172                 len = (len+3) >> 2;\r
 173                 for (h = 0; h < 8; h++) {\r
 174                         offs = (x + g_screen_width * (y+h)) & ~3;\r
 175                         p = (int *) ((char *)g_screen_ptr + offs);\r
 176                         for (i = len; i; i--, p++)\r
 177                                 *p = 0xe0e0e0e0;\r
 178                 }\r
 179                 emu_textOut8(x, y, text);\r
 180         } else {\r
 181                 len = (len+1) >> 1;\r
 182                 for (h = 0; h < 8; h++) {\r
 183                         offs = (x + g_screen_width * (y+h)) & ~1;\r
 184                         p = (int *) ((short *)g_screen_ptr + offs);\r
 185                         for (i = len; i; i--, p++)\r
 186                                 *p = (*p >> 2) & 0x39e7;\r
 187                 }\r
 188                 emu_textOut16(x, y, text);\r
 189         }\r
 190 }\r
 191 \r
 192 static void draw_cd_leds(void)\r
 193 {\r
 194 //      static\r
 195         int old_reg;\r
 196 //      if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change // mmu hack problems?\r
 197         old_reg = Pico_mcd->s68k_regs[0];\r
 198 \r
 199         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 200                 // 8-bit modes\r
 201                 unsigned int col_g = (old_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;\r
 202                 unsigned int col_r = (old_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;\r
 203                 *(unsigned int *)((char *)g_screen_ptr + 320*2+ 4) =\r
 204                 *(unsigned int *)((char *)g_screen_ptr + 320*3+ 4) =\r
 205                 *(unsigned int *)((char *)g_screen_ptr + 320*4+ 4) = col_g;\r
 206                 *(unsigned int *)((char *)g_screen_ptr + 320*2+12) =\r
 207                 *(unsigned int *)((char *)g_screen_ptr + 320*3+12) =\r
 208                 *(unsigned int *)((char *)g_screen_ptr + 320*4+12) = col_r;\r
 209         } else {\r
 210                 // 16-bit modes\r
 211                 unsigned int *p = (unsigned int *)((short *)g_screen_ptr + 320*2+4);\r
 212                 unsigned int col_g = (old_reg & 2) ? 0x06000600 : 0;\r
 213                 unsigned int col_r = (old_reg & 1) ? 0xc000c000 : 0;\r
 214                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 215                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 320/2 - 12/2;\r
 216                 *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;\r
 217         }\r
 218 }\r
 219 \r
 220 static void draw_pico_ptr(void)\r
 221 {\r
 222         unsigned short *p = (unsigned short *)g_screen_ptr;\r
 223 \r
 224         // only if pen enabled and for 16bit modes\r
 225         if (pico_inp_mode == 0 || (PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) return;\r
 226 \r
 227         if (!(Pico.video.reg[12]&1) && !(PicoOpt&POPT_DIS_32C_BORDER))\r
 228                 p += 32;\r
 229 \r
 230         p += 320 * (pico_pen_y + PICO_PEN_ADJUST_Y);\r
 231         p += pico_pen_x + PICO_PEN_ADJUST_X;\r
 232         p[0]   ^= 0xffff;\r
 233         p[319] ^= 0xffff;\r
 234         p[320] ^= 0xffff;\r
 235         p[321] ^= 0xffff;\r
 236         p[640] ^= 0xffff;\r
 237 }\r
 238 \r
 239 static int EmuScanBegin16(unsigned int num)\r
 240 {\r
 241         if (!(Pico.video.reg[1]&8)) num += 8;\r
 242         DrawLineDest = (unsigned short *) g_screen_ptr + g_screen_width * num;\r
 243 \r
 244         return 0;\r
 245 }\r
 246 \r
 247 static int EmuScanBegin8(unsigned int num)\r
 248 {\r
 249         if (!(Pico.video.reg[1]&8)) num += 8;\r
 250         DrawLineDest = (unsigned char *)  g_screen_ptr + g_screen_width * num;\r
 251 \r
 252         return 0;\r
 253 }\r
 254 \r
 255 int localPal[0x100];\r
 256 static void (*vidCpyM2)(void *dest, void *src) = NULL;\r
 257 \r
 258 static void blit(const char *fps, const char *notice)\r
 259 {\r
 260         int emu_opt = currentConfig.EmuOpt;\r
 261 \r
 262         if (PicoOpt&0x10)\r
 263         {\r
 264                 // 8bit fast renderer\r
 265                 if (Pico.m.dirtyPal) {\r
 266                         Pico.m.dirtyPal = 0;\r
 267                         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 268                         // feed new palette to our device\r
 269                         gp2x_video_setpalette(localPal, 0x40);\r
 270                 }\r
 271                 // a hack for VR\r
 272                 if (PicoRead16Hook == PicoSVPRead16)\r
 273                         memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);\r
 274                 // do actual copy\r
 275                 vidCpyM2((unsigned char *)g_screen_ptr+320*8, PicoDraw2FB+328*8);\r
 276         }\r
 277         else if (!(emu_opt&0x80))\r
 278         {\r
 279                 // 8bit accurate renderer\r
 280                 if (Pico.m.dirtyPal)\r
 281                 {\r
 282                         int pallen = 0xc0;\r
 283                         Pico.m.dirtyPal = 0;\r
 284                         if (Pico.video.reg[0xC]&8) // shadow/hilight mode\r
 285                         {\r
 286                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 287                                 vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);\r
 288                                 vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);\r
 289                                 memcpy32(localPal+0xc0, localPal+0x40, 0x40);\r
 290                                 pallen = 0x100;\r
 291                         }\r
 292                         else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes\r
 293                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 294                                 vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);\r
 295                                 vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);\r
 296                         }\r
 297                         else {\r
 298                                 vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 299                                 memcpy32(localPal+0x80, localPal, 0x40); // for spr prio mess\r
 300                         }\r
 301                         if (pallen > 0xc0) {\r
 302                                 localPal[0xc0] = 0x0000c000;\r
 303                                 localPal[0xd0] = 0x00c00000;\r
 304                                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 305                                 localPal[0xf0] = 0x00ffffff;\r
 306                         }\r
 307                         gp2x_video_setpalette(localPal, pallen);\r
 308                 }\r
 309         }\r
 310 \r
 311         if (notice || (emu_opt & 2)) {\r
 312                 int h = 232;\r
 313                 if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8)) h -= 8;\r
 314                 if (notice) osd_text(4, h, notice);\r
 315                 if (emu_opt & 2)\r
 316                         osd_text(osd_fps_x, h, fps);\r
 317         }\r
 318         if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))\r
 319                 draw_cd_leds();\r
 320         if (PicoAHW & PAHW_PICO)\r
 321                 draw_pico_ptr();\r
 322 \r
 323         //gp2x_video_wait_vsync();\r
 324         gp2x_video_flip();\r
 325 \r
 326         if (!(PicoOpt&0x10)) {\r
 327                 if (!(Pico.video.reg[1]&8)) {\r
 328                         if (currentConfig.EmuOpt&0x80) {\r
 329                                 DrawLineDest = (unsigned short *) g_screen_ptr + 320*8;\r
 330                         } else {\r
 331                                 DrawLineDest = (unsigned char  *) g_screen_ptr + 320*8;\r
 332                         }\r
 333                 } else {\r
 334                         DrawLineDest = g_screen_ptr;\r
 335                 }\r
 336         }\r
 337 }\r
 338 \r
 339 \r
 340 // clears whole screen or just the notice area (in all buffers)\r
 341 static void clearArea(int full)\r
 342 {\r
 343         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 344                 // 8-bit renderers\r
 345                 if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 346                 else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 347         } else {\r
 348                 // 16bit accurate renderer\r
 349                 if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);\r
 350                 else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 351         }\r
 352 }\r
 353 \r
 354 \r
 355 static void vidResetMode(void)\r
 356 {\r
 357         if (PicoOpt&0x10) {\r
 358                 gp2x_video_changemode(8);\r
 359         } else if (currentConfig.EmuOpt&0x80) {\r
 360                 gp2x_video_changemode(16);\r
 361                 PicoDrawSetColorFormat(1);\r
 362                 PicoScanBegin = EmuScanBegin16;\r
 363         } else {\r
 364                 gp2x_video_changemode(8);\r
 365                 PicoDrawSetColorFormat(2);\r
 366                 PicoScanBegin = EmuScanBegin8;\r
 367         }\r
 368         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 369                 // setup pal for 8-bit modes\r
 370                 localPal[0xc0] = 0x0000c000; // MCD LEDs\r
 371                 localPal[0xd0] = 0x00c00000;\r
 372                 localPal[0xe0] = 0x00000000; // reserved pixels for OSD\r
 373                 localPal[0xf0] = 0x00ffffff;\r
 374                 gp2x_video_setpalette(localPal, 0x100);\r
 375                 gp2x_memset_all_buffers(0, 0xe0, 320*240);\r
 376                 gp2x_video_flip();\r
 377         }\r
 378         Pico.m.dirtyPal = 1;\r
 379         // reset scaling\r
 380         if (currentConfig.scaling == 2 && !(Pico.video.reg[1]&8))\r
 381              gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);\r
 382         else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);\r
 383 }\r
 384 \r
 385 \r
 386 static void emu_msg_cb(const char *msg)\r
 387 {\r
 388         if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {\r
 389                 // 8-bit renderers\r
 390                 gp2x_memset_all_buffers(320*232, 0xe0, 320*8);\r
 391                 osd_text(4, 232, msg);\r
 392                 gp2x_memcpy_all_buffers((char *)g_screen_ptr+320*232, 320*232, 320*8);\r
 393         } else {\r
 394                 // 16bit accurate renderer\r
 395                 gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);\r
 396                 osd_text(4, 232, msg);\r
 397                 gp2x_memcpy_all_buffers((char *)g_screen_ptr+320*232*2, 320*232*2, 320*8*2);\r
 398         }\r
 399         gettimeofday(&noticeMsgTime, 0);\r
 400         noticeMsgTime.tv_sec -= 2;\r
 401 \r
 402         /* assumption: emu_msg_cb gets called only when something slow is about to happen */\r
 403         reset_timing = 1;\r
 404 }\r
 405 \r
 406 static void emu_state_cb(const char *str)\r
 407 {\r
 408         clearArea(0);\r
 409         blit("", str);\r
 410 }\r
 411 \r
 412 static void emu_msg_tray_open(void)\r
 413 {\r
 414         strcpy(noticeMsg, "CD tray opened");\r
 415         gettimeofday(&noticeMsgTime, 0);\r
 416 }\r
 417 \r
 418 static void RunEventsPico(unsigned int events, unsigned int gp2x_keys)\r
 419 {\r
 420         int ret, px, py, lim_x;\r
 421         static int pdown_frames = 0;\r
 422 \r
 423         emu_RunEventsPico(events);\r
 424 \r
 425         if (pico_inp_mode == 0) return;\r
 426 \r
 427         // for F200\r
 428         ret = gp2x_touchpad_read(&px, &py);\r
 429         if (ret >= 0)\r
 430         {\r
 431                 if (ret > 35000)\r
 432                 {\r
 433                         if (pdown_frames++ > 5)\r
 434                                 PicoPad[0] |= 0x20;\r
 435 \r
 436                         pico_pen_x = px;\r
 437                         pico_pen_y = py;\r
 438                         if (!(Pico.video.reg[12]&1)) {\r
 439                                 pico_pen_x -= 32;\r
 440                                 if (pico_pen_x <   0) pico_pen_x = 0;\r
 441                                 if (pico_pen_x > 248) pico_pen_x = 248;\r
 442                         }\r
 443                         if (pico_pen_y > 224) pico_pen_y = 224;\r
 444                 }\r
 445                 else\r
 446                         pdown_frames = 0;\r
 447 \r
 448                 //if (ret == 0)\r
 449                 //      PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;\r
 450         }\r
 451 \r
 452         PicoPad[0] &= ~0x0f; // release UDLR\r
 453         if (gp2x_keys & GP2X_UP)    pico_pen_y--;\r
 454         if (gp2x_keys & GP2X_DOWN)  pico_pen_y++;\r
 455         if (gp2x_keys & GP2X_LEFT)  pico_pen_x--;\r
 456         if (gp2x_keys & GP2X_RIGHT) pico_pen_x++;\r
 457 \r
 458         lim_x = (Pico.video.reg[12]&1) ? 319 : 255;\r
 459         if (pico_pen_y < 8) pico_pen_y = 8;\r
 460         if (pico_pen_y > 224-PICO_PEN_ADJUST_Y) pico_pen_y = 224-PICO_PEN_ADJUST_Y;\r
 461         if (pico_pen_x < 0) pico_pen_x = 0;\r
 462         if (pico_pen_x > lim_x-PICO_PEN_ADJUST_X) pico_pen_x = lim_x-PICO_PEN_ADJUST_X;\r
 463 \r
 464         PicoPicohw.pen_pos[0] = pico_pen_x;\r
 465         if (!(Pico.video.reg[12]&1)) PicoPicohw.pen_pos[0] += pico_pen_x/4;\r
 466         PicoPicohw.pen_pos[0] += 0x3c;\r
 467         PicoPicohw.pen_pos[1] = pico_inp_mode == 1 ? (0x2f8 + pico_pen_y) : (0x1fc + pico_pen_y);\r
 468 }\r
 469 \r
 470 static void update_volume(int has_changed, int is_up)\r
 471 {\r
 472         static int prev_frame = 0, wait_frames = 0;\r
 473         int vol = currentConfig.volume;\r
 474 \r
 475         if (has_changed)\r
 476         {\r
 477                 if (vol < 5 && (PicoOpt&8) && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)\r
 478                         wait_frames++;\r
 479                 else {\r
 480                         if (is_up) {\r
 481                                 if (vol < 99) vol++;\r
 482                         } else {\r
 483                                 if (vol >  0) vol--;\r
 484                         }\r
 485                         wait_frames = 0;\r
 486                         sndout_oss_setvol(vol, vol);\r
 487                         currentConfig.volume = vol;\r
 488                 }\r
 489                 sprintf(noticeMsg, "VOL: %02i", vol);\r
 490                 gettimeofday(&noticeMsgTime, 0);\r
 491                 prev_frame = Pico.m.frame_count;\r
 492         }\r
 493 \r
 494         // set the right mixer func\r
 495         if (!(PicoOpt&8)) return; // just use defaults for mono\r
 496         if (vol >= 5)\r
 497                 PsndMix_32_to_16l = mix_32_to_16l_stereo;\r
 498         else {\r
 499                 mix_32_to_16l_level = 5 - vol;\r
 500                 PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;\r
 501         }\r
 502 }\r
 503 \r
 504 static void RunEvents(unsigned int which)\r
 505 {\r
 506         if (which & 0x1800) // save or load (but not both)\r
 507         {\r
 508                 int do_it = 1;\r
 509                 if ( emu_checkSaveFile(state_slot) &&\r
 510                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load\r
 511                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save\r
 512                         unsigned long keys;\r
 513                         blit("", (which & 0x1000) ? "LOAD STATE? (Y=yes, X=no)" : "OVERWRITE SAVE? (Y=yes, X=no)");\r
 514                         while ( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )\r
 515                                 usleep(50*1024);\r
 516                         if (keys & GP2X_X) do_it = 0;\r
 517                         while ( gp2x_joystick_read(1) & (GP2X_X|GP2X_Y) ) // wait for release\r
 518                                 usleep(50*1024);\r
 519                         clearArea(0);\r
 520                 }\r
 521                 if (do_it) {\r
 522                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");\r
 523                         PicoStateProgressCB = emu_state_cb;\r
 524                         gp2x_memcpy_all_buffers(g_screen_ptr, 0, 320*240*2);\r
 525                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);\r
 526                         PicoStateProgressCB = NULL;\r
 527                 }\r
 528 \r
 529                 reset_timing = 1;\r
 530         }\r
 531         if (which & 0x0400) // switch renderer\r
 532         {\r
 533                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }\r
 534                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;\r
 535                 else   currentConfig.EmuOpt &= ~0x80;\r
 536 \r
 537                 vidResetMode();\r
 538 \r
 539                 if (PicoOpt&0x10) {\r
 540                         strcpy(noticeMsg, " 8bit fast renderer");\r
 541                 } else if (currentConfig.EmuOpt&0x80) {\r
 542                         strcpy(noticeMsg, "16bit accurate renderer");\r
 543                 } else {\r
 544                         strcpy(noticeMsg, " 8bit accurate renderer");\r
 545                 }\r
 546 \r
 547                 gettimeofday(&noticeMsgTime, 0);\r
 548         }\r
 549         if (which & 0x0300)\r
 550         {\r
 551                 if(which&0x0200) {\r
 552                         state_slot -= 1;\r
 553                         if(state_slot < 0) state_slot = 9;\r
 554                 } else {\r
 555                         state_slot += 1;\r
 556                         if(state_slot > 9) state_slot = 0;\r
 557                 }\r
 558                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");\r
 559                 gettimeofday(&noticeMsgTime, 0);\r
 560         }\r
 561         if (which & 0x0080) {\r
 562                 engineState = PGS_Menu;\r
 563         }\r
 564 }\r
 565 \r
 566 static void updateKeys(void)\r
 567 {\r
 568         unsigned int keys, keys2, allActions[2] = { 0, 0 }, events;\r
 569         static unsigned int prevEvents = 0;\r
 570 \r
 571         keys = gp2x_joystick_read(0);\r
 572         if (keys & GP2X_SELECT)\r
 573                 engineState = select_exits ? PGS_Quit : PGS_Menu;\r
 574 \r
 575         keys &= CONFIGURABLE_KEYS;\r
 576         keys2 = keys;\r
 577 \r
 578         /* FIXME: player2 */\r
 579         allActions[0] = in_update();\r
 580 \r
 581         PicoPad[0] = allActions[0] & 0xfff;\r
 582         PicoPad[1] = allActions[1] & 0xfff;\r
 583 \r
 584         if (allActions[0] & 0x7000) emu_DoTurbo(&PicoPad[0], allActions[0]);\r
 585         if (allActions[1] & 0x7000) emu_DoTurbo(&PicoPad[1], allActions[1]);\r
 586 \r
 587         events = (allActions[0] | allActions[1]) >> 16;\r
 588 \r
 589         // volume is treated in special way and triggered every frame\r
 590         if (events & 0x6000)\r
 591                 update_volume(1, events & 0x2000);\r
 592 \r
 593         if ((events ^ prevEvents) & 0x40) {\r
 594                 emu_changeFastForward(events & 0x40);\r
 595                 update_volume(0, 0);\r
 596                 reset_timing = 1;\r
 597         }\r
 598 \r
 599         events &= ~prevEvents;\r
 600 \r
 601         if (PicoAHW == PAHW_PICO)\r
 602                 RunEventsPico(events, keys);\r
 603         if (events) RunEvents(events);\r
 604         if (movie_data) emu_updateMovie();\r
 605 \r
 606         prevEvents = (allActions[0] | allActions[1]) >> 16;\r
 607 }\r
 608 \r
 609 \r
 610 static void updateSound(int len)\r
 611 {\r
 612         if (PicoOpt&8) len<<=1;\r
 613 \r
 614         /* avoid writing audio when lagging behind to prevent audio lag */\r
 615         if (PicoSkipFrame != 2)\r
 616                 sndout_oss_write(PsndOut, len<<1);\r
 617 }\r
 618 \r
 619 void emu_startSound(void)\r
 620 {\r
 621         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;\r
 622         int target_fps = Pico.m.pal ? 50 : 60;\r
 623 \r
 624         PsndOut = NULL;\r
 625 \r
 626         // prepare sound stuff\r
 627         if (currentConfig.EmuOpt & 4)\r
 628         {\r
 629                 int snd_excess_add;\r
 630                 if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
 631                                 ((PicoOpt&0x200) && crashed_940)) {\r
 632                         PsndRerate(Pico.m.frame_count ? 1 : 0);\r
 633                 }\r
 634                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
 635                 printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
 636                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
 637                 sndout_oss_start(PsndRate, 16, (PicoOpt&8)>>3);\r
 638                 sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
 639                 PicoWriteSound = updateSound;\r
 640                 update_volume(0, 0);\r
 641                 memset(sndBuffer, 0, sizeof(sndBuffer));\r
 642                 PsndOut = sndBuffer;\r
 643                 PsndRate_old = PsndRate;\r
 644                 PicoOpt_old  = PicoOpt;\r
 645                 pal_old = Pico.m.pal;\r
 646         }\r
 647 }\r
 648 \r
 649 void emu_endSound(void)\r
 650 {\r
 651 }\r
 652 \r
 653 /* wait until we can write more sound */\r
 654 void emu_waitSound(void)\r
 655 {\r
 656         // don't need to do anything, writes will block by themselves\r
 657 }\r
 658 \r
 659 \r
 660 static void SkipFrame(int do_audio)\r
 661 {\r
 662         PicoSkipFrame=do_audio ? 1 : 2;\r
 663         PicoFrame();\r
 664         PicoSkipFrame=0;\r
 665 }\r
 666 \r
 667 \r
 668 void emu_forcedFrame(int opts)\r
 669 {\r
 670         int po_old = PicoOpt;\r
 671         int eo_old = currentConfig.EmuOpt;\r
 672 \r
 673         PicoOpt &= ~0x10;\r
 674         PicoOpt |= opts|POPT_ACC_SPRITES; // acc_sprites\r
 675         currentConfig.EmuOpt |= 0x80;\r
 676 \r
 677         //vidResetMode();\r
 678         PicoDrawSetColorFormat(1);\r
 679         PicoScanBegin = EmuScanBegin16;\r
 680         Pico.m.dirtyPal = 1;\r
 681         PicoFrameDrawOnly();\r
 682 \r
 683 /*\r
 684         if (!(Pico.video.reg[12]&1)) {\r
 685                 vidCpyM2 = vidCpyM2_32col;\r
 686                 clearArea(1);\r
 687         } else  vidCpyM2 = vidCpyM2_40col;\r
 688 \r
 689         vidCpyM2((unsigned char *)g_screen_ptr+320*8, PicoDraw2FB+328*8);\r
 690         vidConvCpyRGB32(localPal, Pico.cram, 0x40);\r
 691         gp2x_video_setpalette(localPal, 0x40);\r
 692 */\r
 693         PicoOpt = po_old;\r
 694         currentConfig.EmuOpt = eo_old;\r
 695 }\r
 696 \r
 697 void emu_platformDebugCat(char *str)\r
 698 {\r
 699         // nothing\r
 700 }\r
 701 \r
 702 static void simpleWait(int thissec, int lim_time)\r
 703 {\r
 704         struct timeval tval;\r
 705 \r
 706         spend_cycles(1024);\r
 707         gettimeofday(&tval, 0);\r
 708         if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 709 \r
 710         while (tval.tv_usec < lim_time)\r
 711         {\r
 712                 spend_cycles(1024);\r
 713                 gettimeofday(&tval, 0);\r
 714                 if (thissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 715         }\r
 716 }\r
 717 \r
 718 \r
 719 #if 0\r
 720 static void tga_dump(void)\r
 721 {\r
 722 #define BYTE unsigned char\r
 723 #define WORD unsigned short\r
 724         struct\r
 725         {\r
 726                 BYTE IDLength;        /* 00h  Size of Image ID field */\r
 727                 BYTE ColorMapType;    /* 01h  Color map type */\r
 728                 BYTE ImageType;       /* 02h  Image type code */\r
 729                 WORD CMapStart;       /* 03h  Color map origin */\r
 730                 WORD CMapLength;      /* 05h  Color map length */\r
 731                 BYTE CMapDepth;       /* 07h  Depth of color map entries */\r
 732                 WORD XOffset;         /* 08h  X origin of image */\r
 733                 WORD YOffset;         /* 0Ah  Y origin of image */\r
 734                 WORD Width;           /* 0Ch  Width of image */\r
 735                 WORD Height;          /* 0Eh  Height of image */\r
 736                 BYTE PixelDepth;      /* 10h  Image pixel size */\r
 737                 BYTE ImageDescriptor; /* 11h  Image descriptor byte */\r
 738         } __attribute__((packed)) TGAHEAD;\r
 739         static unsigned short oldscr[320*240];\r
 740         FILE *f; char name[128]; int i;\r
 741 \r
 742         memset(&TGAHEAD, 0, sizeof(TGAHEAD));\r
 743         TGAHEAD.ImageType = 2;\r
 744         TGAHEAD.Width = 320;\r
 745         TGAHEAD.Height = 240;\r
 746         TGAHEAD.PixelDepth = 16;\r
 747         TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left\r
 748 \r
 749 #define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?\r
 750 \r
 751         for (i = 0; i < 320*240; i++)\r
 752                 if(oldscr[i] != CONV(((unsigned short *)g_screen_ptr)[i])) break;\r
 753         if (i < 320*240)\r
 754         {\r
 755                 for (i = 0; i < 320*240; i++)\r
 756                         oldscr[i] = CONV(((unsigned short *)g_screen_ptr)[i]);\r
 757                 sprintf(name, "%05i.tga", Pico.m.frame_count);\r
 758                 f = fopen(name, "wb");\r
 759                 if (!f) { printf("!f\n"); exit(1); }\r
 760                 fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);\r
 761                 fwrite(oldscr, 1, 320*240*2, f);\r
 762                 fclose(f);\r
 763         }\r
 764 }\r
 765 #endif\r
 766 \r
 767 \r
 768 void emu_Loop(void)\r
 769 {\r
 770         static int gp2x_old_clock = 200, EmuOpt_old = 0;\r
 771         char fpsbuff[24]; // fps count c string\r
 772         struct timeval tval; // timing\r
 773         int pframes_done, pframes_shown, pthissec; // "period" frames, used for sync\r
 774         int  frames_done,  frames_shown,  thissec; // actual frames\r
 775         int oldmodes = 0, target_fps, target_frametime, lim_time, vsync_offset, i;\r
 776         char *notice = 0;\r
 777 \r
 778         printf("entered emu_Loop()\n");\r
 779 \r
 780         if (gp2x_old_clock != currentConfig.CPUclock) {\r
 781                 printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);\r
 782                 set_FCLK(currentConfig.CPUclock);\r
 783                 gp2x_old_clock = currentConfig.CPUclock;\r
 784                 printf(" done\n");\r
 785         }\r
 786 \r
 787         if (gp2x_old_gamma != currentConfig.gamma || (EmuOpt_old&0x1000) != (currentConfig.EmuOpt&0x1000)) {\r
 788                 set_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 789                 gp2x_old_gamma = currentConfig.gamma;\r
 790                 printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));\r
 791         }\r
 792 \r
 793         if ((EmuOpt_old&0x2000) != (currentConfig.EmuOpt&0x2000)) {\r
 794                 if (currentConfig.EmuOpt&0x2000)\r
 795                      set_LCD_custom_rate(Pico.m.pal ? LCDR_100 : LCDR_120);\r
 796                 else unset_LCD_custom_rate();\r
 797         }\r
 798 \r
 799         EmuOpt_old = currentConfig.EmuOpt;\r
 800         fpsbuff[0] = 0;\r
 801 \r
 802         // make sure we are in correct mode\r
 803         vidResetMode();\r
 804         scaling_update();\r
 805         Pico.m.dirtyPal = 1;\r
 806         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;\r
 807 \r
 808         // pal/ntsc might have changed, reset related stuff\r
 809         target_fps = Pico.m.pal ? 50 : 60;\r
 810         target_frametime = 1000000/target_fps;\r
 811         reset_timing = 1;\r
 812 \r
 813         emu_startSound();\r
 814 \r
 815         // prepare CD buffer\r
 816         if (PicoAHW & PAHW_MCD) PicoCDBufferInit();\r
 817 \r
 818         // calc vsync offset to sync timing code with vsync\r
 819         if (currentConfig.EmuOpt&0x2000) {\r
 820                 gettimeofday(&tval, 0);\r
 821                 gp2x_video_wait_vsync();\r
 822                 gettimeofday(&tval, 0);\r
 823                 vsync_offset = tval.tv_usec;\r
 824                 while (vsync_offset >= target_frametime)\r
 825                         vsync_offset -= target_frametime;\r
 826                 if (!vsync_offset) vsync_offset++;\r
 827                 printf("vsync_offset: %i\n", vsync_offset);\r
 828         } else\r
 829                 vsync_offset = 0;\r
 830 \r
 831         frames_done = frames_shown = thissec =\r
 832         pframes_done = pframes_shown = pthissec = 0;\r
 833 \r
 834         // loop\r
 835         while (engineState == PGS_Running)\r
 836         {\r
 837                 int modes;\r
 838 \r
 839                 gettimeofday(&tval, 0);\r
 840                 if (reset_timing) {\r
 841                         reset_timing = 0;\r
 842                         pthissec = tval.tv_sec;\r
 843                         pframes_shown = pframes_done = tval.tv_usec/target_frametime;\r
 844                 }\r
 845 \r
 846                 // show notice message?\r
 847                 if (noticeMsgTime.tv_sec)\r
 848                 {\r
 849                         static int noticeMsgSum;\r
 850                         if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec\r
 851                                 noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;\r
 852                                 clearArea(0);\r
 853                                 notice = 0;\r
 854                         } else {\r
 855                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];\r
 856                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }\r
 857                                 notice = noticeMsg;\r
 858                         }\r
 859                 }\r
 860 \r
 861                 // check for mode changes\r
 862                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);\r
 863                 if (modes != oldmodes)\r
 864                 {\r
 865                         int scalex = 320;\r
 866                         osd_fps_x = OSD_FPS_X;\r
 867                         if (modes & 4) {\r
 868                                 vidCpyM2 = vidCpyM2_40col;\r
 869                         } else {\r
 870                                 if (PicoOpt & 0x100) {\r
 871                                         vidCpyM2 = vidCpyM2_32col_nobord;\r
 872                                         scalex = 256;\r
 873                                         osd_fps_x = OSD_FPS_X - 64;\r
 874                                 } else {\r
 875                                         vidCpyM2 = vidCpyM2_32col;\r
 876                                 }\r
 877                         }\r
 878                         if (currentConfig.scaling == 2 && !(modes&8)) // want vertical scaling and game is not in 240 line mode\r
 879                              gp2x_video_RGB_setscaling(8, scalex, 224);\r
 880                         else gp2x_video_RGB_setscaling(0, scalex, 240);\r
 881                         oldmodes = modes;\r
 882                         clearArea(1);\r
 883                 }\r
 884 \r
 885                 // second changed?\r
 886                 if (thissec != tval.tv_sec)\r
 887                 {\r
 888 #ifdef BENCHMARK\r
 889                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];\r
 890                         if (++bench == 10) {\r
 891                                 bench = 0;\r
 892                                 bench_fps_s = bench_fps;\r
 893                                 bf[bfp++ & 3] = bench_fps;\r
 894                                 bench_fps = 0;\r
 895                         }\r
 896                         bench_fps += frames_shown;\r
 897                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);\r
 898 #else\r
 899                         if (currentConfig.EmuOpt & 2) {\r
 900                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);\r
 901                                 if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }\r
 902                         }\r
 903 #endif\r
 904                         frames_shown = frames_done = 0;\r
 905                         thissec = tval.tv_sec;\r
 906                 }\r
 907 #ifdef PFRAMES\r
 908                 sprintf(fpsbuff, "%i", Pico.m.frame_count);\r
 909 #endif\r
 910 \r
 911                 if (pthissec != tval.tv_sec)\r
 912                 {\r
 913                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {\r
 914                                 pframes_done = pframes_shown = 0;\r
 915                         } else {\r
 916                                 // it is quite common for this implementation to leave 1 fame unfinished\r
 917                                 // when second changes, but we don't want buffer to starve.\r
 918                                 if(PsndOut && pframes_done < target_fps && pframes_done > target_fps-5) {\r
 919                                         updateKeys();\r
 920                                         SkipFrame(1); pframes_done++;\r
 921                                 }\r
 922 \r
 923                                 pframes_done  -= target_fps; if (pframes_done  < 0) pframes_done  = 0;\r
 924                                 pframes_shown -= target_fps; if (pframes_shown < 0) pframes_shown = 0;\r
 925                                 if (pframes_shown > pframes_done) pframes_shown = pframes_done;\r
 926                         }\r
 927                         pthissec = tval.tv_sec;\r
 928                 }\r
 929 \r
 930                 lim_time = (pframes_done+1) * target_frametime + vsync_offset;\r
 931                 if (currentConfig.Frameskip >= 0) // frameskip enabled\r
 932                 {\r
 933                         for(i = 0; i < currentConfig.Frameskip; i++) {\r
 934                                 updateKeys();\r
 935                                 SkipFrame(1); pframes_done++; frames_done++;\r
 936                                 if (PsndOut && !reset_timing) { // do framelimitting if sound is enabled\r
 937                                         gettimeofday(&tval, 0);\r
 938                                         if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 939                                         if (tval.tv_usec < lim_time) { // we are too fast\r
 940                                                 simpleWait(pthissec, lim_time);\r
 941                                         }\r
 942                                 }\r
 943                                 lim_time += target_frametime;\r
 944                         }\r
 945                 }\r
 946                 else if (tval.tv_usec > lim_time) // auto frameskip\r
 947                 {\r
 948                         // no time left for this frame - skip\r
 949                         if (tval.tv_usec - lim_time >= 300000) {\r
 950                                 /* something caused a slowdown for us (disk access? cache flush?)\r
 951                                  * try to recover by resetting timing... */\r
 952                                 reset_timing = 1;\r
 953                                 continue;\r
 954                         }\r
 955                         updateKeys();\r
 956                         SkipFrame(tval.tv_usec < lim_time+target_frametime*2); pframes_done++; frames_done++;\r
 957                         continue;\r
 958                 }\r
 959 \r
 960                 updateKeys();\r
 961                 PicoFrame();\r
 962 \r
 963                 // check time\r
 964                 gettimeofday(&tval, 0);\r
 965                 if (pthissec != tval.tv_sec) tval.tv_usec+=1000000;\r
 966 \r
 967                 if (currentConfig.Frameskip < 0 && tval.tv_usec - lim_time >= 300000) // slowdown detection\r
 968                         reset_timing = 1;\r
 969                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)\r
 970                 {\r
 971                         // sleep or vsync if we are still too fast\r
 972                         // usleep sleeps for ~20ms minimum, so it is not a solution here\r
 973                         if (!reset_timing && tval.tv_usec < lim_time)\r
 974                         {\r
 975                                 // we are too fast\r
 976                                 if (vsync_offset) {\r
 977                                         if (lim_time - tval.tv_usec > target_frametime/2)\r
 978                                                 simpleWait(pthissec, lim_time - target_frametime/4);\r
 979                                         gp2x_video_wait_vsync();\r
 980                                 } else {\r
 981                                         simpleWait(pthissec, lim_time);\r
 982                                 }\r
 983                         }\r
 984                 }\r
 985 \r
 986                 blit(fpsbuff, notice);\r
 987 \r
 988                 pframes_done++; pframes_shown++;\r
 989                  frames_done++;  frames_shown++;\r
 990         }\r
 991 \r
 992         emu_changeFastForward(0);\r
 993 \r
 994         if (PicoAHW & PAHW_MCD) PicoCDBufferFree();\r
 995 \r
 996         // save SRAM\r
 997         if((currentConfig.EmuOpt & 1) && SRam.changed) {\r
 998                 emu_state_cb("Writing SRAM/BRAM..");\r
 999                 emu_SaveLoadGame(0, 1);\r
1000                 SRam.changed = 0;\r
1001         }\r
1002 \r
1003         // if in 8bit mode, generate 16bit image for menu background\r
1004         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80))\r
1005                 emu_forcedFrame(POPT_EN_SOFTSCALE);\r
1006 }\r
1007 \r
1008 \r
1009 void emu_ResetGame(void)\r
1010 {\r
1011         PicoReset();\r
1012         reset_timing = 1;\r
1013 }\r
1014 \r
1015 const char *plat_get_credits(void)\r
1016 {\r
1017         return "PicoDrive v" VERSION " (c) notaz, 2006-2009\n\n\n"\r
1018                 "Credits:\n"\r
1019                 "fDave: Cyclone 68000 core,\n"\r
1020                 "      base code of PicoDrive\n"\r
1021                 "Reesy & FluBBa: DrZ80 core\n"\r
1022                 "MAME devs: YM2612 and SN76496 cores\n"\r
1023                 "rlyeh and others: minimal SDK\n"\r
1024                 "Squidge: squidgehack\n"\r
1025                 "Dzz: ARM940 sample\n"\r
1026                 "GnoStiC / Puck2099: USB joy code\n"\r
1027                 "craigix: GP2X hardware\n"\r
1028                 "ketchupgun: skin design\n"\r
1029                 "\n"\r
1030                 "special thanks (for docs, ideas):\n"\r
1031                 " Charles MacDonald, Haze,\n"\r
1032                 " Stephane Dallongeville,\n"\r
1033                 " Lordus, Exophase, Rokas,\n"\r
1034                 " Nemesis, Tasco Deluxe";\r
1035 }\r