platform/gizmondo/emu.c

   1 #include <windows.h>
   2 #include <string.h>
   3
   4 #include <sys/stat.h>  // mkdir
   5 #include <sys/types.h>
   6
   7 #include "kgsdk/Framework.h"
   8 #include "kgsdk/Framework2D.h"
   9 #include "kgsdk/FrameworkAudio.h"
  10 #include "../common/emu.h"
  11 #include "../common/lprintf.h"
  12 #include "../common/arm_utils.h"
  13 #include "emu.h"
  14 #include "menu.h"
  15 #include "giz.h"
  16 #include "asm_utils.h"
  17
  18 #include <Pico/PicoInt.h>
  19
  20 #ifdef BENCHMARK
  21 #define OSD_FPS_X 220
  22 #else
  23 #define OSD_FPS_X 260
  24 #endif
  25
  26 // main 300K gfx-related buffer. Used by menu and renderers.
  27 unsigned char gfx_buffer[321*240*2*2];
  28 char romFileName[MAX_PATH];
  29 int engineState;
  30
  31 unsigned char *PicoDraw2FB = gfx_buffer;  // temporary buffer for alt renderer ( (8+320)*(8+240+8) )
  32 int reset_timing = 0;
  33
  34 static DWORD noticeMsgTime = 0;
  35
  36
  37 static void blit(const char *fps, const char *notice);
  38 static void clearArea(int full);
  39
  40 void emu_noticeMsgUpdated(void)
  41 {
  42         noticeMsgTime = GetTickCount();
  43 }
  44
  45 void emu_getMainDir(char *dst, int len)
  46 {
  47         if (len > 0) *dst = 0;
  48 }
  49
  50 static void emu_msg_cb(const char *msg)
  51 {
  52         if (giz_screen == NULL)
  53                 giz_screen = Framework2D_LockBuffer();
  54
  55         memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
  56         emu_textOut16(4, 232, msg);
  57         noticeMsgTime = GetTickCount() - 2000;
  58
  59         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  60         reset_timing = 1;
  61 }
  62
  63 static void emu_state_cb(const char *str)
  64 {
  65         if (giz_screen == NULL)
  66                 giz_screen = Framework2D_LockBuffer();
  67
  68         clearArea(0);
  69         blit("", str);
  70
  71         Framework2D_UnlockBuffer();
  72         giz_screen = NULL;
  73 }
  74
  75 static void emu_msg_tray_open(void)
  76 {
  77         strcpy(noticeMsg, "CD tray opened");
  78         noticeMsgTime = GetTickCount();
  79 }
  80
  81
  82 void emu_Init(void)
  83 {
  84         // make dirs for saves, cfgs, etc.
  85         mkdir("mds", 0777);
  86         mkdir("srm", 0777);
  87         mkdir("brm", 0777);
  88         mkdir("cfg", 0777);
  89
  90         PicoInit();
  91         PicoMessage = emu_msg_cb;
  92         PicoMCDopenTray = emu_msg_tray_open;
  93         PicoMCDcloseTray = menu_loop_tray;
  94 }
  95
  96 void emu_Deinit(void)
  97 {
  98         // save SRAM
  99         if((currentConfig.EmuOpt & 1) && SRam.changed) {
 100                 emu_SaveLoadGame(0, 1);
 101                 SRam.changed = 0;
 102         }
 103
 104         if (!(currentConfig.EmuOpt & 0x20)) {
 105                 FILE *f = fopen(PicoConfigFile, "r+b");
 106                 if (!f) emu_WriteConfig(0);
 107                 else {
 108                         // if we already have config, reload it, except last ROM
 109                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
 110                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
 111                         fseek(f, 0, SEEK_SET);
 112                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 113                         fflush(f);
 114                         fclose(f);
 115                 }
 116         }
 117
 118         PicoExit();
 119 }
 120
 121 void emu_setDefaultConfig(void)
 122 {
 123         memset(&currentConfig, 0, sizeof(currentConfig));
 124         currentConfig.lastRomFile[0] = 0;
 125         currentConfig.EmuOpt  = 0x1f | 0x680; // | confirm_save, cd_leds, 16bit rend
 126         currentConfig.PicoOpt = 0x0f | 0xc00; // | cd_pcm, cd_cdda
 127         currentConfig.PsndRate = 22050;
 128         currentConfig.PicoRegion = 0; // auto
 129         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 130         currentConfig.Frameskip = 0;//-1; // auto
 131         currentConfig.volume = 50;
 132         currentConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
 133         currentConfig.KeyBinds[ 3] = 1<<1;
 134         currentConfig.KeyBinds[ 0] = 1<<2;
 135         currentConfig.KeyBinds[ 1] = 1<<3;
 136         currentConfig.KeyBinds[ 5] = 1<<4;
 137         currentConfig.KeyBinds[ 6] = 1<<5;
 138         currentConfig.KeyBinds[ 7] = 1<<6;
 139         currentConfig.KeyBinds[ 4] = 1<<7;
 140         currentConfig.KeyBinds[13] = 1<<26; // switch rend
 141         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 142         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 143         currentConfig.KeyBinds[12] = 1<<29; // vol up
 144         currentConfig.KeyBinds[11] = 1<<30; // vol down
 145         currentConfig.PicoCDBuffers = 64;
 146         currentConfig.scaling = 0;
 147 }
 148
 149
 150 static int EmuScan16(unsigned int num, void *sdata)
 151 {
 152         if (!(Pico.video.reg[1]&8)) num += 8;
 153         DrawLineDest = (unsigned short *) giz_screen + 321*(num+1);
 154
 155         return 0;
 156 }
 157
 158 static int EmuScan8(unsigned int num, void *sdata)
 159 {
 160         // draw like the fast renderer
 161         if (!(Pico.video.reg[1]&8)) num += 8;
 162         HighCol = gfx_buffer + 328*(num+1);
 163
 164         return 0;
 165 }
 166
 167 static void osd_text(int x, int y, const char *text)
 168 {
 169         int len = strlen(text) * 8 / 2;
 170         int *p, h;
 171         for (h = 0; h < 8; h++) {
 172                 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
 173                 p = (int *) ((int)p & ~3); // align
 174                 memset32(p, 0, len);
 175         }
 176         emu_textOut16(x, y, text);
 177 }
 178
 179 /*
 180 void log1(void *p1, void *p2)
 181 {
 182         lprintf("%p %p %p\n", p1, p2, DrawLineDest);
 183 }
 184 */
 185
 186 static void cd_leds(void)
 187 {
 188         static int old_reg = 0;
 189         unsigned int col_g, col_r, *p;
 190
 191         if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
 192         old_reg = Pico_mcd->s68k_regs[0];
 193
 194         p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
 195         col_g = (old_reg & 2) ? 0x06000600 : 0;
 196         col_r = (old_reg & 1) ? 0xc000c000 : 0;
 197         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
 198         *p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
 199         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 200 }
 201
 202
 203 static short localPal[0x100];
 204
 205 static void blit(const char *fps, const char *notice)
 206 {
 207         int emu_opt = currentConfig.EmuOpt;
 208
 209         if (PicoOpt&0x10)
 210         {
 211                 int lines_flags = 224;
 212                 // 8bit fast renderer
 213                 if (Pico.m.dirtyPal) {
 214                         Pico.m.dirtyPal = 0;
 215                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 216                 }
 217                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x100;
 218                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 219         }
 220         else if (!(emu_opt&0x80))
 221         {
 222                 int lines_flags;
 223                 // 8bit accurate renderer
 224                 if (Pico.m.dirtyPal) {
 225                         Pico.m.dirtyPal = 0;
 226                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 227                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
 228                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 229                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
 230                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
 231                                 localPal[0xc0] = 0x0600;
 232                                 localPal[0xd0] = 0xc000;
 233                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 234                                 localPal[0xf0] = 0xffff;
 235                         }
 236                         /* no support
 237                         else if (rendstatus & 0x20) { // mid-frame palette changes
 238                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
 239                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
 240                         } */
 241                 }
 242                 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
 243                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x100;
 244                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 245         }
 246
 247         if (notice || (emu_opt & 2)) {
 248                 int h = 232;
 249                 if (notice)      osd_text(4, h, notice);
 250                 if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
 251         }
 252
 253         if ((emu_opt & 0x400) && (PicoMCD & 1))
 254                 cd_leds();
 255 }
 256
 257 // clears whole screen or just the notice area (in all buffers)
 258 static void clearArea(int full)
 259 {
 260         if (giz_screen == NULL)
 261                 giz_screen = Framework2D_LockBuffer();
 262         if (full) memset32(giz_screen, 0, 320*240*2/4);
 263         else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 264 }
 265
 266 static void vidResetMode(void)
 267 {
 268         giz_screen = Framework2D_LockBuffer();
 269
 270         if (PicoOpt&0x10) {
 271         } else if (currentConfig.EmuOpt&0x80) {
 272                 PicoDrawSetColorFormat(1);
 273                 PicoScan = EmuScan16;
 274         } else {
 275                 PicoDrawSetColorFormat(-1);
 276                 PicoScan = EmuScan8;
 277         }
 278         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
 279                 // setup pal for 8-bit modes
 280                 localPal[0xc0] = 0x0600;
 281                 localPal[0xd0] = 0xc000;
 282                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 283                 localPal[0xf0] = 0xffff;
 284         }
 285         Pico.m.dirtyPal = 1;
 286
 287         memset32(giz_screen, 0, 321*240*2/4);
 288         Framework2D_UnlockBuffer();
 289         giz_screen = NULL;
 290 }
 291
 292
 293 static void SkipFrame(int do_audio)
 294 {
 295         PicoSkipFrame=do_audio ? 1 : 2;
 296         PicoFrame();
 297         PicoSkipFrame=0;
 298 }
 299
 300 void emu_forcedFrame(void)
 301 {
 302         // TODO
 303 }
 304
 305 static void RunEvents(unsigned int which)
 306 {
 307         if (which & 0x1800) { // save or load (but not both)
 308                 int do_it = 1;
 309                 if ( emu_checkSaveFile(state_slot) &&
 310                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load
 311                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save
 312                         int keys;
 313                         blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
 314                         while( !((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) )
 315                                 Sleep(50);
 316                         if (keys & BTN_STOP) do_it = 0;
 317                         clearArea(0);
 318                 }
 319                 if (do_it) {
 320                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
 321                         PicoStateProgressCB = emu_state_cb;
 322                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 323                         PicoStateProgressCB = NULL;
 324                 }
 325
 326                 reset_timing = 1;
 327         }
 328         if (which & 0x0400) { // switch renderer
 329                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }
 330                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;
 331                 else   currentConfig.EmuOpt &= ~0x80;
 332
 333                 vidResetMode();
 334
 335                 if (PicoOpt&0x10) {
 336                         strcpy(noticeMsg, " 8bit fast renderer");
 337                 } else if (currentConfig.EmuOpt&0x80) {
 338                         strcpy(noticeMsg, "16bit accurate renderer");
 339                 } else {
 340                         strcpy(noticeMsg, " 8bit accurate renderer");
 341                 }
 342
 343                 noticeMsgTime = GetTickCount();
 344         }
 345         if (which & 0x0300) {
 346                 if(which&0x0200) {
 347                         state_slot -= 1;
 348                         if(state_slot < 0) state_slot = 9;
 349                 } else {
 350                         state_slot += 1;
 351                         if(state_slot > 9) state_slot = 0;
 352                 }
 353                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 354                 noticeMsgTime = GetTickCount();
 355         }
 356 }
 357
 358 static void updateKeys(void)
 359 {
 360         unsigned int keys, allActions[2] = { 0, 0 }, events;
 361         static unsigned int prevEvents = 0;
 362         int i;
 363
 364         keys = Framework_PollGetButtons();
 365         if (keys & BTN_HOME) {
 366                 engineState = PGS_Menu;
 367                 // wait until select is released, so menu would not resume game
 368                 while (Framework_PollGetButtons() & BTN_HOME) Sleep(50);
 369         }
 370
 371         keys &= CONFIGURABLE_KEYS;
 372
 373         for (i = 0; i < 32; i++)
 374         {
 375                 if (keys & (1 << i)) {
 376                         int pl, acts = currentConfig.KeyBinds[i];
 377                         if (!acts) continue;
 378                         pl = (acts >> 16) & 1;
 379                         /* TODO if (combo_keys & (1 << i)) {
 380                                 int u = i+1, acts_c = acts & combo_acts;
 381                                 // let's try to find the other one
 382                                 if (acts_c)
 383                                         for (; u < 32; u++)
 384                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 385                                                         allActions[pl] |= acts_c;
 386                                                         keys &= ~((1 << i) | (1 << u));
 387                                                         break;
 388                                                 }
 389                                 // add non-combo actions if combo ones were not found
 390                                 if (!acts_c || u == 32)
 391                                         allActions[pl] |= acts & ~combo_acts;
 392                         } else */ {
 393                                 allActions[pl] |= acts;
 394                         }
 395                 }
 396         }
 397
 398         PicoPad[0] = (unsigned short) allActions[0];
 399         PicoPad[1] = (unsigned short) allActions[1];
 400
 401         events = (allActions[0] | allActions[1]) >> 16;
 402
 403         // volume is treated in special way and triggered every frame
 404         if (events & 0x6000) {
 405                 int vol = currentConfig.volume;
 406                 if (events & 0x2000) {
 407                         if (vol < 100) vol++;
 408                 } else {
 409                         if (vol >   0) vol--;
 410                 }
 411                 //gp2x_sound_volume(vol, vol);
 412                 sprintf(noticeMsg, "VOL: %02i", vol);
 413                 noticeMsgTime = GetTickCount();
 414                 currentConfig.volume = vol;
 415         }
 416
 417         events &= ~prevEvents;
 418         if (events) RunEvents(events);
 419         if (movie_data) emu_updateMovie();
 420
 421         prevEvents = (allActions[0] | allActions[1]) >> 16;
 422 }
 423
 424 static void simpleWait(DWORD until)
 425 {
 426         DWORD tval;
 427         int diff;
 428
 429         tval = GetTickCount();
 430         diff = (int)until - (int)tval;
 431         if (diff >= 2)
 432                 Sleep(diff - 1);
 433
 434         while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
 435                 spend_cycles(1024*2);
 436 }
 437
 438 void emu_Loop(void)
 439 {
 440         //static int PsndRate_old = 0, PicoOpt_old = 0, PsndLen_real = 0, pal_old = 0;
 441         char fpsbuff[24]; // fps count c string
 442         DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
 443         int frames_done = 0, frames_shown = 0, oldmodes = 0;
 444         int target_fps, target_frametime, lim_time, tval_diff, i;
 445         char *notice = NULL;
 446
 447         lprintf("entered emu_Loop()\n");
 448
 449         fpsbuff[0] = 0;
 450
 451         // make sure we are in correct mode
 452         vidResetMode();
 453         if (currentConfig.scaling) PicoOpt|=0x4000;
 454         else PicoOpt&=~0x4000;
 455         Pico.m.dirtyPal = 1;
 456         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 457         //find_combos(); // TODO
 458
 459         // pal/ntsc might have changed, reset related stuff
 460         target_fps = Pico.m.pal ? 50 : 60;
 461         target_frametime = (1000<<8)/target_fps;
 462         reset_timing = 1;
 463
 464         // prepare sound stuff
 465 /*      if (currentConfig.EmuOpt & 4) {
 466                 int snd_excess_add;
 467                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 468                         sound_rerate(Pico.m.frame_count ? 1 : 0);
 469                 }
 470                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 471                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
 472                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);
 473                 gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);
 474                 gp2x_sound_volume(currentConfig.volume, currentConfig.volume);
 475                 PicoWriteSound = updateSound;
 476                 memset(sndBuffer, 0, sizeof(sndBuffer));
 477                 PsndOut = sndBuffer;
 478                 PsndRate_old = PsndRate;
 479                 PsndLen_real = PsndLen;
 480                 PicoOpt_old  = PicoOpt;
 481                 pal_old = Pico.m.pal;
 482         } else*/ {
 483                 PsndOut = 0;
 484         }
 485
 486         // prepare CD buffer
 487         if (PicoMCD & 1) PicoCDBufferInit();
 488
 489         // loop?
 490         while (engineState == PGS_Running)
 491         {
 492                 int modes;
 493
 494                 tval = GetTickCount();
 495                 if (reset_timing || tval < tval_prev) {
 496                         reset_timing = 0;
 497                         tval_thissec = tval;
 498                         frames_shown = frames_done = 0;
 499                 }
 500
 501                 // show notice message?
 502                 if (noticeMsgTime) {
 503                         static int noticeMsgSum;
 504                         if (tval - noticeMsgTime > 2000) { // > 2.0 sec
 505                                 noticeMsgTime = 0;
 506                                 clearArea(0);
 507                                 notice = 0;
 508                         } else {
 509                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 510                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 511                                 notice = noticeMsg;
 512                         }
 513                 }
 514
 515                 // check for mode changes
 516                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 517                 if (modes != oldmodes) {
 518                         oldmodes = modes;
 519                         clearArea(1);
 520                 }
 521
 522                 // second passed?
 523                 if (tval - tval_thissec >= 1000)
 524                 {
 525 #ifdef BENCHMARK
 526                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
 527                         if(++bench == 10) {
 528                                 bench = 0;
 529                                 bench_fps_s = bench_fps;
 530                                 bf[bfp++ & 3] = bench_fps;
 531                                 bench_fps = 0;
 532                         }
 533                         bench_fps += frames_shown;
 534                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
 535 #else
 536                         if(currentConfig.EmuOpt & 2)
 537                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
 538 #endif
 539                         tval_thissec = tval;
 540
 541                         if (PsndOut == 0 && currentConfig.Frameskip >= 0) {
 542                                 frames_done = frames_shown = 0;
 543                         } else {
 544                                 // it is quite common for this implementation to leave 1 fame unfinished
 545                                 // when second changes, but we don't want buffer to starve.
 546                                 if (PsndOut && frames_done < target_fps && frames_done > target_fps-5) {
 547                                         updateKeys();
 548                                         SkipFrame(1); frames_done++;
 549                                 }
 550
 551                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 552                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 553                                 if (frames_shown > frames_done) frames_shown = frames_done;
 554                         }
 555                 }
 556 #ifdef PFRAMES
 557                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 558 #endif
 559
 560                 tval_prev = tval;
 561                 lim_time = (frames_done+1) * target_frametime;
 562                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 563                 {
 564                         for (i = 0; i < currentConfig.Frameskip; i++) {
 565                                 updateKeys();
 566                                 SkipFrame(1); frames_done++;
 567                                 if (PsndOut) { // do framelimitting if sound is enabled
 568                                         int tval_diff;
 569                                         tval = GetTickCount();
 570                                         tval_diff = (int)(tval - tval_thissec) << 8;
 571                                         if (tval_diff < lim_time) // we are too fast
 572                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 573                                 }
 574                                 lim_time += target_frametime;
 575                         }
 576                 }
 577                 else // auto frameskip
 578                 {
 579                         int tval_diff;
 580                         tval = GetTickCount();
 581                         tval_diff = (int)(tval - tval_thissec) << 8;
 582                         if (tval_diff > lim_time)
 583                         {
 584                                 // no time left for this frame - skip
 585                                 if (tval_diff - lim_time >= (300<<8)) {
 586                                         /* something caused a slowdown for us (disk access? cache flush?)
 587                                          * try to recover by resetting timing... */
 588                                         reset_timing = 1;
 589                                         continue;
 590                                 }
 591                                 updateKeys();
 592                                 SkipFrame(tval_diff < lim_time+target_frametime*2); frames_done++;
 593                                 continue;
 594                         }
 595                 }
 596
 597                 updateKeys();
 598
 599                 if (giz_screen == NULL && (currentConfig.EmuOpt&0x80))
 600                         giz_screen = Framework2D_LockBuffer();
 601                 if (!(PicoOpt&0x10))
 602                         PicoScan((unsigned) -1, NULL);
 603
 604                 PicoFrame();
 605
 606                 if (giz_screen == NULL)
 607                         giz_screen = Framework2D_LockBuffer();
 608
 609                 blit(fpsbuff, notice);
 610
 611                 if (giz_screen != NULL) {
 612                         Framework2D_UnlockBuffer();
 613                         giz_screen = NULL;
 614                 }
 615
 616                 // check time
 617                 tval = GetTickCount();
 618                 tval_diff = (int)(tval - tval_thissec) << 8;
 619
 620                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
 621                         reset_timing = 1;
 622                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 623                 {
 624                         // sleep if we are still too fast
 625                         if (tval_diff < lim_time)
 626                         {
 627                                 // we are too fast
 628                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 629                         }
 630                 }
 631
 632                 frames_done++; frames_shown++;
 633         }
 634
 635
 636         if (PicoMCD & 1) PicoCDBufferFree();
 637
 638         // save SRAM
 639         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 640                 emu_state_cb("Writing SRAM/BRAM..");
 641                 emu_SaveLoadGame(0, 1);
 642                 SRam.changed = 0;
 643         }
 644 }
 645
 646
 647 void emu_ResetGame(void)
 648 {
 649         PicoReset(0);
 650         reset_timing = 1;
 651 }
 652