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 int combo_keys = 0, combo_acts = 0; // keys and actions which need button combos
  35 static DWORD noticeMsgTime = 0;
  36 static short *snd_cbuff = NULL;
  37 static int snd_cbuf_samples = 0, snd_all_samples = 0;
  38
  39
  40 static void blit(const char *fps, const char *notice);
  41 static void clearArea(int full);
  42
  43 void emu_noticeMsgUpdated(void)
  44 {
  45         noticeMsgTime = GetTickCount();
  46 }
  47
  48 void emu_getMainDir(char *dst, int len)
  49 {
  50         if (len > 0) *dst = 0;
  51 }
  52
  53 static void emu_msg_cb(const char *msg)
  54 {
  55         if (giz_screen == NULL)
  56                 giz_screen = Framework2D_LockBuffer();
  57
  58         memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
  59         emu_textOut16(4, 232, msg);
  60         noticeMsgTime = GetTickCount() - 2000;
  61
  62         /* assumption: emu_msg_cb gets called only when something slow is about to happen */
  63         reset_timing = 1;
  64 }
  65
  66 static void emu_state_cb(const char *str)
  67 {
  68         if (giz_screen == NULL)
  69                 giz_screen = Framework2D_LockBuffer();
  70
  71         clearArea(0);
  72         blit("", str);
  73
  74         Framework2D_UnlockBuffer();
  75         giz_screen = NULL;
  76 }
  77
  78 static void emu_msg_tray_open(void)
  79 {
  80         strcpy(noticeMsg, "CD tray opened");
  81         noticeMsgTime = GetTickCount();
  82 }
  83
  84
  85 void emu_Init(void)
  86 {
  87         // make dirs for saves, cfgs, etc.
  88         mkdir("mds", 0777);
  89         mkdir("srm", 0777);
  90         mkdir("brm", 0777);
  91         mkdir("cfg", 0777);
  92
  93         PicoInit();
  94         PicoMessage = emu_msg_cb;
  95         PicoMCDopenTray = emu_msg_tray_open;
  96         PicoMCDcloseTray = menu_loop_tray;
  97 }
  98
  99 void emu_Deinit(void)
 100 {
 101         // save SRAM
 102         if((currentConfig.EmuOpt & 1) && SRam.changed) {
 103                 emu_SaveLoadGame(0, 1);
 104                 SRam.changed = 0;
 105         }
 106
 107         if (!(currentConfig.EmuOpt & 0x20)) {
 108                 FILE *f = fopen(PicoConfigFile, "r+b");
 109                 if (!f) emu_WriteConfig(0);
 110                 else {
 111                         // if we already have config, reload it, except last ROM
 112                         fseek(f, sizeof(currentConfig.lastRomFile), SEEK_SET);
 113                         fread(&currentConfig.EmuOpt, 1, sizeof(currentConfig) - sizeof(currentConfig.lastRomFile), f);
 114                         fseek(f, 0, SEEK_SET);
 115                         fwrite(&currentConfig, 1, sizeof(currentConfig), f);
 116                         fflush(f);
 117                         fclose(f);
 118                 }
 119         }
 120
 121         PicoExit();
 122 }
 123
 124 void emu_setDefaultConfig(void)
 125 {
 126         memset(&currentConfig, 0, sizeof(currentConfig));
 127         currentConfig.lastRomFile[0] = 0;
 128         currentConfig.EmuOpt  = 0x1f | 0x680; // | confirm_save, cd_leds, 16bit rend
 129         currentConfig.PicoOpt = 0x07 | 0xc00; // | cd_pcm, cd_cdda
 130         currentConfig.PsndRate = 22050;
 131         currentConfig.PicoRegion = 0; // auto
 132         currentConfig.PicoAutoRgnOrder = 0x184; // US, EU, JP
 133         currentConfig.Frameskip = -1; // auto
 134         currentConfig.volume = 50;
 135         currentConfig.KeyBinds[ 2] = 1<<0; // SACB RLDU
 136         currentConfig.KeyBinds[ 3] = 1<<1;
 137         currentConfig.KeyBinds[ 0] = 1<<2;
 138         currentConfig.KeyBinds[ 1] = 1<<3;
 139         currentConfig.KeyBinds[ 5] = 1<<4;
 140         currentConfig.KeyBinds[ 6] = 1<<5;
 141         currentConfig.KeyBinds[ 7] = 1<<6;
 142         currentConfig.KeyBinds[ 4] = 1<<7;
 143         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 144         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 145         currentConfig.KeyBinds[12] = 1<<29; // vol up
 146         currentConfig.KeyBinds[11] = 1<<30; // vol down
 147         currentConfig.PicoCDBuffers = 0;
 148         currentConfig.scaling = 0;
 149 }
 150
 151
 152 static int EmuScan16(unsigned int num, void *sdata)
 153 {
 154         if (!(Pico.video.reg[1]&8)) num += 8;
 155         DrawLineDest = (unsigned short *) giz_screen + 321*(num+1);
 156
 157         return 0;
 158 }
 159
 160 static int EmuScan8(unsigned int num, void *sdata)
 161 {
 162         // draw like the fast renderer
 163         if (!(Pico.video.reg[1]&8)) num += 8;
 164         HighCol = gfx_buffer + 328*(num+1);
 165
 166         return 0;
 167 }
 168
 169 static void osd_text(int x, int y, const char *text)
 170 {
 171         int len = strlen(text) * 8 / 2;
 172         int *p, h;
 173         for (h = 0; h < 8; h++) {
 174                 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
 175                 p = (int *) ((int)p & ~3); // align
 176                 memset32(p, 0, len);
 177         }
 178         emu_textOut16(x, y, text);
 179 }
 180
 181 /*
 182 void log1(void *p1, void *p2)
 183 {
 184         lprintf("%p %p %p\n", p1, p2, DrawLineDest);
 185 }
 186 */
 187
 188 static void cd_leds(void)
 189 {
 190         static int old_reg = 0;
 191         unsigned int col_g, col_r, *p;
 192
 193         if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
 194         old_reg = Pico_mcd->s68k_regs[0];
 195
 196         p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
 197         col_g = (old_reg & 2) ? 0x06000600 : 0;
 198         col_r = (old_reg & 1) ? 0xc000c000 : 0;
 199         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
 200         *p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
 201         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 202 }
 203
 204
 205 static short localPal[0x100];
 206
 207 static void blit(const char *fps, const char *notice)
 208 {
 209         int emu_opt = currentConfig.EmuOpt;
 210
 211         if (PicoOpt&0x10)
 212         {
 213                 int lines_flags = 224;
 214                 // 8bit fast renderer
 215                 if (Pico.m.dirtyPal) {
 216                         Pico.m.dirtyPal = 0;
 217                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 218                 }
 219                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x100;
 220                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 221         }
 222         else if (!(emu_opt&0x80))
 223         {
 224                 int lines_flags;
 225                 // 8bit accurate renderer
 226                 if (Pico.m.dirtyPal) {
 227                         Pico.m.dirtyPal = 0;
 228                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 229                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
 230                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 231                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
 232                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
 233                                 localPal[0xc0] = 0x0600;
 234                                 localPal[0xd0] = 0xc000;
 235                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 236                                 localPal[0xf0] = 0xffff;
 237                         }
 238                         /* no support
 239                         else if (rendstatus & 0x20) { // mid-frame palette changes
 240                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
 241                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
 242                         } */
 243                 }
 244                 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
 245                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x100;
 246                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 247         }
 248
 249         if (notice || (emu_opt & 2)) {
 250                 int h = 232;
 251                 if (notice)      osd_text(4, h, notice);
 252                 if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
 253         }
 254
 255         if ((emu_opt & 0x400) && (PicoMCD & 1))
 256                 cd_leds();
 257 }
 258
 259 // clears whole screen or just the notice area (in all buffers)
 260 static void clearArea(int full)
 261 {
 262         if (giz_screen == NULL)
 263                 giz_screen = Framework2D_LockBuffer();
 264         if (full) memset32(giz_screen, 0, 320*240*2/4);
 265         else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 266 }
 267
 268 static void vidResetMode(void)
 269 {
 270         giz_screen = Framework2D_LockBuffer();
 271
 272         if (PicoOpt&0x10) {
 273         } else if (currentConfig.EmuOpt&0x80) {
 274                 PicoDrawSetColorFormat(1);
 275                 PicoScan = EmuScan16;
 276         } else {
 277                 PicoDrawSetColorFormat(-1);
 278                 PicoScan = EmuScan8;
 279         }
 280         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
 281                 // setup pal for 8-bit modes
 282                 localPal[0xc0] = 0x0600;
 283                 localPal[0xd0] = 0xc000;
 284                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 285                 localPal[0xf0] = 0xffff;
 286         }
 287         Pico.m.dirtyPal = 1;
 288
 289         memset32(giz_screen, 0, 321*240*2/4);
 290         Framework2D_UnlockBuffer();
 291         giz_screen = NULL;
 292 }
 293
 294
 295 #include <stdarg.h>
 296 static void stdbg(const char *fmt, ...)
 297 {
 298         static int cnt = 0;
 299         va_list vl;
 300
 301         sprintf(noticeMsg, "%x ", cnt++);
 302         va_start(vl, fmt);
 303         vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
 304         va_end(vl);
 305
 306         noticeMsgTime = GetTickCount();
 307 }
 308
 309
 310 static void updateSound(int len)
 311 {
 312         if (PicoOpt&8) len<<=1;
 313
 314         snd_all_samples += len;
 315         PsndOut += len;
 316         if (PsndOut - snd_cbuff >= snd_cbuf_samples)
 317         {
 318                 if (PsndOut - snd_cbuff != snd_cbuf_samples)
 319                         stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
 320                 PsndOut = snd_cbuff;
 321         }
 322 }
 323
 324
 325 static void SkipFrame(void)
 326 {
 327         PicoSkipFrame=1;
 328         PicoFrame();
 329         PicoSkipFrame=0;
 330 }
 331
 332 void emu_forcedFrame(void)
 333 {
 334         int po_old = PicoOpt;
 335         int eo_old = currentConfig.EmuOpt;
 336
 337         PicoOpt &= ~0x0010;
 338         PicoOpt |=  0x4080; // soft_scale | acc_sprites
 339         currentConfig.EmuOpt |= 0x80;
 340
 341         if (giz_screen == NULL)
 342                 giz_screen = Framework2D_LockBuffer();
 343
 344         PicoDrawSetColorFormat(1);
 345         PicoScan = EmuScan16;
 346         PicoScan((unsigned) -1, NULL);
 347         Pico.m.dirtyPal = 1;
 348         PicoFrameDrawOnly();
 349
 350         Framework2D_UnlockBuffer();
 351         giz_screen = NULL;
 352
 353         PicoOpt = po_old;
 354         currentConfig.EmuOpt = eo_old;
 355 }
 356
 357
 358 static void RunEvents(unsigned int which)
 359 {
 360         if (which & 0x1800) { // save or load (but not both)
 361                 int do_it = 1;
 362                 if ( emu_checkSaveFile(state_slot) &&
 363                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) ||   // load
 364                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) { // save
 365                         int keys;
 366                         blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
 367                         while( !((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) )
 368                                 Sleep(50);
 369                         if (keys & BTN_STOP) do_it = 0;
 370                         clearArea(0);
 371                 }
 372                 if (do_it) {
 373                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
 374                         PicoStateProgressCB = emu_state_cb;
 375                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 376                         PicoStateProgressCB = NULL;
 377                 }
 378
 379                 reset_timing = 1;
 380         }
 381         if (which & 0x0400) { // switch renderer
 382                 if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }
 383                 else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;
 384                 else   currentConfig.EmuOpt &= ~0x80;
 385
 386                 vidResetMode();
 387
 388                 if (PicoOpt&0x10) {
 389                         strcpy(noticeMsg, " 8bit fast renderer");
 390                 } else if (currentConfig.EmuOpt&0x80) {
 391                         strcpy(noticeMsg, "16bit accurate renderer");
 392                 } else {
 393                         strcpy(noticeMsg, " 8bit accurate renderer");
 394                 }
 395
 396                 noticeMsgTime = GetTickCount();
 397         }
 398         if (which & 0x0300) {
 399                 if(which&0x0200) {
 400                         state_slot -= 1;
 401                         if(state_slot < 0) state_slot = 9;
 402                 } else {
 403                         state_slot += 1;
 404                         if(state_slot > 9) state_slot = 0;
 405                 }
 406                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 407                 noticeMsgTime = GetTickCount();
 408         }
 409 }
 410
 411 static void updateKeys(void)
 412 {
 413         unsigned int keys, allActions[2] = { 0, 0 }, events;
 414         static unsigned int prevEvents = 0;
 415         int i;
 416
 417         keys = Framework_PollGetButtons();
 418         if (keys & BTN_HOME)
 419                 engineState = PGS_Menu;
 420
 421         keys &= CONFIGURABLE_KEYS;
 422
 423         for (i = 0; i < 32; i++)
 424         {
 425                 if (keys & (1 << i))
 426                 {
 427                         int pl, acts = currentConfig.KeyBinds[i];
 428                         if (!acts) continue;
 429                         pl = (acts >> 16) & 1;
 430                         if (combo_keys & (1 << i))
 431                         {
 432                                 int u = i+1, acts_c = acts & combo_acts;
 433                                 // let's try to find the other one
 434                                 if (acts_c)
 435                                         for (; u < 32; u++)
 436                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 437                                                         allActions[pl] |= acts_c;
 438                                                         keys &= ~((1 << i) | (1 << u));
 439                                                         break;
 440                                                 }
 441                                 // add non-combo actions if combo ones were not found
 442                                 if (!acts_c || u == 32)
 443                                         allActions[pl] |= acts & ~combo_acts;
 444                         } else {
 445                                 allActions[pl] |= acts;
 446                         }
 447                 }
 448         }
 449
 450         PicoPad[0] = (unsigned short) allActions[0];
 451         PicoPad[1] = (unsigned short) allActions[1];
 452
 453         events = (allActions[0] | allActions[1]) >> 16;
 454
 455         // volume is treated in special way and triggered every frame
 456         if ((events & 0x6000) && PsndOut != NULL)
 457         {
 458                 int vol = currentConfig.volume;
 459                 if (events & 0x2000) {
 460                         if (vol < 100) vol++;
 461                 } else {
 462                         if (vol >   0) vol--;
 463                 }
 464                 FrameworkAudio_SetVolume(vol, vol);
 465                 sprintf(noticeMsg, "VOL: %02i", vol);
 466                 noticeMsgTime = GetTickCount();
 467                 currentConfig.volume = vol;
 468         }
 469
 470         events &= ~prevEvents;
 471         if (events) RunEvents(events);
 472         if (movie_data) emu_updateMovie();
 473
 474         prevEvents = (allActions[0] | allActions[1]) >> 16;
 475 }
 476
 477 static void find_combos(void)
 478 {
 479         int act, u;
 480
 481         // find out which keys and actions are combos
 482         combo_keys = combo_acts = 0;
 483         for (act = 0; act < 32; act++)
 484         {
 485                 int keyc = 0;
 486                 if (act == 16 || act == 17) continue; // player2 flag
 487                 for (u = 0; u < 32; u++)
 488                 {
 489                         if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
 490                 }
 491                 if (keyc > 1)
 492                 {
 493                         // loop again and mark those keys and actions as combo
 494                         for (u = 0; u < 32; u++)
 495                         {
 496                                 if (currentConfig.KeyBinds[u] & (1 << act)) {
 497                                         combo_keys |= 1 << u;
 498                                         combo_acts |= 1 << act;
 499                                 }
 500                         }
 501                 }
 502         }
 503 }
 504
 505
 506 static void simpleWait(DWORD until)
 507 {
 508         DWORD tval;
 509         int diff;
 510
 511         tval = GetTickCount();
 512         diff = (int)until - (int)tval;
 513         if (diff >= 2)
 514                 Sleep(diff - 1);
 515
 516         while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
 517                 spend_cycles(1024*2);
 518 }
 519
 520 void emu_Loop(void)
 521 {
 522         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 523         char fpsbuff[24]; // fps count c string
 524         DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
 525         int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
 526         int target_fps, target_frametime, lim_time, tval_diff, i;
 527         char *notice = NULL;
 528
 529         lprintf("entered emu_Loop()\n");
 530
 531         fpsbuff[0] = 0;
 532
 533         // make sure we are in correct mode
 534         vidResetMode();
 535         if (currentConfig.scaling) PicoOpt|=0x4000;
 536         else PicoOpt&=~0x4000;
 537         Pico.m.dirtyPal = 1;
 538         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 539         find_combos();
 540
 541         // pal/ntsc might have changed, reset related stuff
 542         target_fps = Pico.m.pal ? 50 : 60;
 543         target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
 544         reset_timing = 1;
 545
 546         // prepare CD buffer
 547         if (PicoMCD & 1) PicoCDBufferInit();
 548
 549         // prepare sound stuff
 550         PsndOut = NULL;
 551         if (currentConfig.EmuOpt & 4)
 552         {
 553                 int ret, snd_excess_add, stereo=(PicoOpt&8)>>3;
 554                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 555                         sound_rerate(Pico.m.frame_count ? 1 : 0);
 556                 }
 557                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 558                 snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
 559                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
 560                         PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);
 561                 ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
 562                 if (ret != 0) {
 563                         lprintf("FrameworkAudio_Init() failed: %i\n", ret);
 564                         sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 565                         noticeMsgTime = GetTickCount();
 566                         currentConfig.EmuOpt &= ~4;
 567                 } else {
 568                         FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
 569                         PicoWriteSound = updateSound;
 570                         snd_cbuff = FrameworkAudio_56448Buffer();
 571                         PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
 572                         snd_all_samples = 0;
 573                         PsndRate_old = PsndRate;
 574                         PicoOpt_old  = PicoOpt;
 575                         pal_old = Pico.m.pal;
 576                 }
 577         }
 578
 579         // loop?
 580         while (engineState == PGS_Running)
 581         {
 582                 int modes;
 583
 584                 tval = GetTickCount();
 585                 if (reset_timing || tval < tval_prev) {
 586                         stdbg("timing reset");
 587                         reset_timing = 0;
 588                         tval_thissec = tval;
 589                         frames_shown = frames_done = 0;
 590                 }
 591
 592                 // show notice message?
 593                 if (noticeMsgTime) {
 594                         static int noticeMsgSum;
 595                         if (tval - noticeMsgTime > 2000) { // > 2.0 sec
 596                                 noticeMsgTime = 0;
 597                                 clearArea(0);
 598                                 notice = 0;
 599                         } else {
 600                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 601                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 602                                 notice = noticeMsg;
 603                         }
 604                 }
 605
 606                 // check for mode changes
 607                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 608                 if (modes != oldmodes) {
 609                         oldmodes = modes;
 610                         clearArea(1);
 611                 }
 612
 613                 // second passed?
 614                 if (tval - tval_thissec >= sec_ms)
 615                 {
 616 #ifdef BENCHMARK
 617                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
 618                         if(++bench == 10) {
 619                                 bench = 0;
 620                                 bench_fps_s = bench_fps;
 621                                 bf[bfp++ & 3] = bench_fps;
 622                                 bench_fps = 0;
 623                         }
 624                         bench_fps += frames_shown;
 625                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
 626 #else
 627                         if(currentConfig.EmuOpt & 2)
 628                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
 629 #endif
 630                         //tval_thissec += 1000;
 631                         tval_thissec += sec_ms;
 632
 633                         if (PsndOut != NULL)
 634                         {
 635                                 int audio_skew, adj;
 636                                 audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
 637                                 if (audio_skew < 0)
 638                                      adj = -((-audio_skew) >> 10);
 639                                 else adj = audio_skew >> 10;
 640                                 target_frametime += adj;
 641                                 sec_ms = (target_frametime * target_fps) >> 8;
 642                                 stdbg("%i %i %i", audio_skew, adj, sec_ms);
 643                                 frames_done = frames_shown = 0;
 644                         }
 645                         else if (currentConfig.Frameskip < 0) {
 646                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 647                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 648                                 if (frames_shown > frames_done) frames_shown = frames_done;
 649                         } else {
 650                                 frames_done = frames_shown = 0;
 651                         }
 652                 }
 653 #ifdef PFRAMES
 654                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 655 #endif
 656
 657                 tval_prev = tval;
 658                 lim_time = (frames_done+1) * target_frametime;
 659                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 660                 {
 661                         for (i = 0; i < currentConfig.Frameskip; i++) {
 662                                 updateKeys();
 663                                 SkipFrame(); frames_done++;
 664                                 if (PsndOut) { // do framelimitting if sound is enabled
 665                                         int tval_diff;
 666                                         tval = GetTickCount();
 667                                         tval_diff = (int)(tval - tval_thissec) << 8;
 668                                         if (tval_diff < lim_time) // we are too fast
 669                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 670                                 }
 671                                 lim_time += target_frametime;
 672                         }
 673                 }
 674                 else // auto frameskip
 675                 {
 676                         int tval_diff;
 677                         tval = GetTickCount();
 678                         tval_diff = (int)(tval - tval_thissec) << 8;
 679                         if (tval_diff > lim_time)
 680                         {
 681                                 // no time left for this frame - skip
 682                                 if (tval_diff - lim_time >= (300<<8)) {
 683                                         /* something caused a slowdown for us (disk access? cache flush?)
 684                                          * try to recover by resetting timing... */
 685                                         reset_timing = 1;
 686                                         continue;
 687                                 }
 688                                 updateKeys();
 689                                 SkipFrame(); frames_done++;
 690                                 continue;
 691                         }
 692                 }
 693
 694                 updateKeys();
 695
 696                 if (giz_screen == NULL && (currentConfig.EmuOpt&0x80))
 697                         giz_screen = Framework2D_LockBuffer();
 698                 if (!(PicoOpt&0x10))
 699                         PicoScan((unsigned) -1, NULL);
 700
 701                 PicoFrame();
 702
 703                 if (giz_screen == NULL)
 704                         giz_screen = Framework2D_LockBuffer();
 705
 706                 blit(fpsbuff, notice);
 707
 708                 if (giz_screen != NULL) {
 709                         Framework2D_UnlockBuffer();
 710                         giz_screen = NULL;
 711                 }
 712
 713                 // check time
 714                 tval = GetTickCount();
 715                 tval_diff = (int)(tval - tval_thissec) << 8;
 716
 717                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
 718                         reset_timing = 1;
 719                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 720                 {
 721                         // sleep if we are still too fast
 722                         if (tval_diff < lim_time)
 723                         {
 724                                 // we are too fast
 725                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 726                         }
 727                 }
 728
 729                 frames_done++; frames_shown++;
 730         }
 731
 732
 733         if (PicoMCD & 1) PicoCDBufferFree();
 734
 735         if (PsndOut != NULL) {
 736                 PsndOut = snd_cbuff = NULL;
 737                 FrameworkAudio_Close();
 738         }
 739
 740         // save SRAM
 741         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 742                 emu_state_cb("Writing SRAM/BRAM..");
 743                 emu_SaveLoadGame(0, 1);
 744                 SRam.changed = 0;
 745         }
 746 }
 747
 748
 749 void emu_ResetGame(void)
 750 {
 751         PicoReset(0);
 752         reset_timing = 1;
 753 }
 754