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[13] = 1<<26; // switch rend
 144         currentConfig.KeyBinds[ 8] = 1<<27; // save state
 145         currentConfig.KeyBinds[ 9] = 1<<28; // load state
 146         currentConfig.KeyBinds[12] = 1<<29; // vol up
 147         currentConfig.KeyBinds[11] = 1<<30; // vol down
 148         currentConfig.PicoCDBuffers = 0;
 149         currentConfig.scaling = 0;
 150 }
 151
 152
 153 static int EmuScan16(unsigned int num, void *sdata)
 154 {
 155         if (!(Pico.video.reg[1]&8)) num += 8;
 156         DrawLineDest = (unsigned short *) giz_screen + 321*(num+1);
 157
 158         if ((currentConfig.EmuOpt&0x4000) && (num&1) == (Pico.m.frame_count&1))
 159                 return 1; // skip next line
 160
 161         return 0;
 162 }
 163
 164 static int EmuScan8(unsigned int num, void *sdata)
 165 {
 166         // draw like the fast renderer
 167         if (!(Pico.video.reg[1]&8)) num += 8;
 168         HighCol = gfx_buffer + 328*(num+1);
 169
 170         return 0;
 171 }
 172
 173 static void osd_text(int x, int y, const char *text)
 174 {
 175         int len = strlen(text) * 8 / 2;
 176         int *p, h;
 177         for (h = 0; h < 8; h++) {
 178                 p = (int *) ((unsigned short *) giz_screen+x+321*(y+h));
 179                 p = (int *) ((int)p & ~3); // align
 180                 memset32(p, 0, len);
 181         }
 182         emu_textOut16(x, y, text);
 183 }
 184
 185 /*
 186 void log1(void *p1, void *p2)
 187 {
 188         lprintf("%p %p %p\n", p1, p2, DrawLineDest);
 189 }
 190 */
 191
 192 static void cd_leds(void)
 193 {
 194         static int old_reg = 0;
 195         unsigned int col_g, col_r, *p;
 196
 197         if (!((Pico_mcd->s68k_regs[0] ^ old_reg) & 3)) return; // no change
 198         old_reg = Pico_mcd->s68k_regs[0];
 199
 200         p = (unsigned int *)((short *)giz_screen + 321*2+4+2);
 201         col_g = (old_reg & 2) ? 0x06000600 : 0;
 202         col_r = (old_reg & 1) ? 0xc000c000 : 0;
 203         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r; p += 321/2 - 12/2 + 1;
 204         *p++ = col_g; p+=3; *p++ = col_r; p += 321/2 - 10/2;
 205         *p++ = col_g; *p++ = col_g; p+=2; *p++ = col_r; *p++ = col_r;
 206 }
 207
 208
 209 static short localPal[0x100];
 210
 211 static void blit(const char *fps, const char *notice)
 212 {
 213         int emu_opt = currentConfig.EmuOpt;
 214
 215         if (PicoOpt&0x10)
 216         {
 217                 int lines_flags = 224;
 218                 // 8bit fast renderer
 219                 if (Pico.m.dirtyPal) {
 220                         Pico.m.dirtyPal = 0;
 221                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 222                 }
 223                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 224                 if (currentConfig.EmuOpt&0x4000)
 225                         lines_flags|=(Pico.m.frame_count&1)?0x20000:0x40000;
 226                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 227         }
 228         else if (!(emu_opt&0x80))
 229         {
 230                 int lines_flags;
 231                 // 8bit accurate renderer
 232                 if (Pico.m.dirtyPal) {
 233                         Pico.m.dirtyPal = 0;
 234                         vidConvCpyRGB565(localPal, Pico.cram, 0x40);
 235                         if (Pico.video.reg[0xC]&8) { // shadow/hilight mode
 236                                 //vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
 237                                 //vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40); // TODO?
 238                                 blockcpy(localPal+0xc0, localPal+0x40, 0x40*2);
 239                                 localPal[0xc0] = 0x0600;
 240                                 localPal[0xd0] = 0xc000;
 241                                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 242                                 localPal[0xf0] = 0xffff;
 243                         }
 244                         /* no support
 245                         else if (rendstatus & 0x20) { // mid-frame palette changes
 246                                 vidConvCpyRGB565(localPal+0x40, HighPal, 0x40);
 247                                 vidConvCpyRGB565(localPal+0x80, HighPal+0x40, 0x40);
 248                         } */
 249                 }
 250                 lines_flags = (Pico.video.reg[1]&8) ? 240 : 224;
 251                 if (!(Pico.video.reg[12]&1)) lines_flags|=0x10000;
 252                 if (currentConfig.EmuOpt&0x4000)
 253                         lines_flags|=(Pico.m.frame_count&1)?0x20000:0x40000;
 254                 vidCpy8to16((unsigned short *)giz_screen+321*8, PicoDraw2FB+328*8, localPal, lines_flags);
 255         }
 256
 257         if (notice || (emu_opt & 2)) {
 258                 int h = 232;
 259                 if (notice)      osd_text(4, h, notice);
 260                 if (emu_opt & 2) osd_text(OSD_FPS_X, h, fps);
 261         }
 262
 263         if ((emu_opt & 0x400) && (PicoMCD & 1))
 264                 cd_leds();
 265 }
 266
 267 // clears whole screen or just the notice area (in all buffers)
 268 static void clearArea(int full)
 269 {
 270         if (giz_screen == NULL)
 271                 giz_screen = Framework2D_LockBuffer();
 272         if (full) memset32(giz_screen, 0, 320*240*2/4);
 273         else      memset32((int *)((char *)giz_screen + 321*232*2), 0, 321*8*2/4);
 274 }
 275
 276 static void vidResetMode(void)
 277 {
 278         giz_screen = Framework2D_LockBuffer();
 279
 280         if (PicoOpt&0x10) {
 281         } else if (currentConfig.EmuOpt&0x80) {
 282                 PicoDrawSetColorFormat(1);
 283                 PicoScan = EmuScan16;
 284         } else {
 285                 PicoDrawSetColorFormat(-1);
 286                 PicoScan = EmuScan8;
 287         }
 288         if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
 289                 // setup pal for 8-bit modes
 290                 localPal[0xc0] = 0x0600;
 291                 localPal[0xd0] = 0xc000;
 292                 localPal[0xe0] = 0x0000; // reserved pixels for OSD
 293                 localPal[0xf0] = 0xffff;
 294         }
 295         Pico.m.dirtyPal = 1;
 296
 297         memset32(giz_screen, 0, 321*240*2/4);
 298         Framework2D_UnlockBuffer();
 299         giz_screen = NULL;
 300 }
 301
 302
 303 #include <stdarg.h>
 304 static void stdbg(const char *fmt, ...)
 305 {
 306         static int cnt = 0;
 307         va_list vl;
 308
 309         sprintf(noticeMsg, "%x ", cnt++);
 310         va_start(vl, fmt);
 311         vsnprintf(noticeMsg+strlen(noticeMsg), sizeof(noticeMsg)-strlen(noticeMsg), fmt, vl);
 312         va_end(vl);
 313
 314         noticeMsgTime = GetTickCount();
 315 }
 316
 317
 318 static void updateSound(int len)
 319 {
 320         if (PicoOpt&8) len<<=1;
 321
 322         snd_all_samples += len;
 323         PsndOut += len;
 324         if (PsndOut - snd_cbuff >= snd_cbuf_samples)
 325         {
 326                 if (PsndOut - snd_cbuff != snd_cbuf_samples)
 327                         stdbg("snd diff is %i, not %i", PsndOut - snd_cbuff, snd_cbuf_samples);
 328                 PsndOut = snd_cbuff;
 329         }
 330 }
 331
 332
 333 static void SkipFrame(void)
 334 {
 335         PicoSkipFrame=1;
 336         PicoFrame();
 337         PicoSkipFrame=0;
 338 }
 339
 340 void emu_forcedFrame(void)
 341 {
 342         int po_old = PicoOpt;
 343         int eo_old = currentConfig.EmuOpt;
 344
 345         PicoOpt &= ~0x0010;
 346         PicoOpt |=  0x4080; // soft_scale | acc_sprites
 347         currentConfig.EmuOpt |= 0x80;
 348
 349         if (giz_screen == NULL)
 350                 giz_screen = Framework2D_LockBuffer();
 351
 352         PicoDrawSetColorFormat(1);
 353         PicoScan = EmuScan16;
 354         PicoScan((unsigned) -1, NULL);
 355         Pico.m.dirtyPal = 1;
 356         PicoFrameDrawOnly();
 357
 358         Framework2D_UnlockBuffer();
 359         giz_screen = NULL;
 360
 361         PicoOpt = po_old;
 362         currentConfig.EmuOpt = eo_old;
 363 }
 364
 365
 366 static void RunEvents(unsigned int which)
 367 {
 368         if (which & 0x1800) { // save or load (but not both)
 369                 int do_it = 1;
 370                 if ( emu_checkSaveFile(state_slot) &&
 371                                 (( (which & 0x1000) && (currentConfig.EmuOpt & 0x800)) || // load
 372                                  (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200))) ) // save
 373                 {
 374                         int keys;
 375                         if (giz_screen == NULL)
 376                                 giz_screen = Framework2D_LockBuffer();
 377                         blit("", (which & 0x1000) ? "LOAD STATE? (PLAY=yes, STOP=no)" : "OVERWRITE SAVE? (PLAY=yes, STOP=no)");
 378                         while( !((keys = Framework_PollGetButtons()) & (BTN_PLAY|BTN_STOP)) )
 379                                 Sleep(50);
 380                         if (keys & BTN_STOP) do_it = 0;
 381                         clearArea(0);
 382                 }
 383                 if (do_it) {
 384                         osd_text(4, 232, (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
 385                         PicoStateProgressCB = emu_state_cb;
 386                         emu_SaveLoadGame((which & 0x1000) >> 12, 0);
 387                         PicoStateProgressCB = NULL;
 388                 }
 389
 390                 reset_timing = 1;
 391         }
 392         if (which & 0x0400) { // switch renderer
 393                 if (PicoOpt&0x10) { PicoOpt&=~0x10; currentConfig.EmuOpt |=  0x80; }
 394                 else              { PicoOpt|= 0x10; currentConfig.EmuOpt &= ~0x80; }
 395
 396                 vidResetMode();
 397
 398                 if (PicoOpt&0x10) {
 399                         strcpy(noticeMsg, " 8bit fast renderer");
 400                 } else if (currentConfig.EmuOpt&0x80) {
 401                         strcpy(noticeMsg, "16bit accurate renderer");
 402                 } else {
 403                         strcpy(noticeMsg, " 8bit accurate renderer");
 404                 }
 405
 406                 noticeMsgTime = GetTickCount();
 407         }
 408         if (which & 0x0300) {
 409                 if(which&0x0200) {
 410                         state_slot -= 1;
 411                         if(state_slot < 0) state_slot = 9;
 412                 } else {
 413                         state_slot += 1;
 414                         if(state_slot > 9) state_slot = 0;
 415                 }
 416                 sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, emu_checkSaveFile(state_slot) ? "USED" : "FREE");
 417                 noticeMsgTime = GetTickCount();
 418         }
 419 }
 420
 421 static void updateKeys(void)
 422 {
 423         unsigned int keys, allActions[2] = { 0, 0 }, events;
 424         static unsigned int prevEvents = 0;
 425         int i;
 426
 427         keys = Framework_PollGetButtons();
 428         if (keys & BTN_HOME)
 429                 engineState = PGS_Menu;
 430
 431         keys &= CONFIGURABLE_KEYS;
 432
 433         for (i = 0; i < 32; i++)
 434         {
 435                 if (keys & (1 << i))
 436                 {
 437                         int pl, acts = currentConfig.KeyBinds[i];
 438                         if (!acts) continue;
 439                         pl = (acts >> 16) & 1;
 440                         if (combo_keys & (1 << i))
 441                         {
 442                                 int u = i+1, acts_c = acts & combo_acts;
 443                                 // let's try to find the other one
 444                                 if (acts_c)
 445                                         for (; u < 32; u++)
 446                                                 if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
 447                                                         allActions[pl] |= acts_c;
 448                                                         keys &= ~((1 << i) | (1 << u));
 449                                                         break;
 450                                                 }
 451                                 // add non-combo actions if combo ones were not found
 452                                 if (!acts_c || u == 32)
 453                                         allActions[pl] |= acts & ~combo_acts;
 454                         } else {
 455                                 allActions[pl] |= acts;
 456                         }
 457                 }
 458         }
 459
 460         PicoPad[0] = (unsigned short) allActions[0];
 461         PicoPad[1] = (unsigned short) allActions[1];
 462
 463         events = (allActions[0] | allActions[1]) >> 16;
 464
 465         // volume is treated in special way and triggered every frame
 466         if ((events & 0x6000) && PsndOut != NULL)
 467         {
 468                 int vol = currentConfig.volume;
 469                 if (events & 0x2000) {
 470                         if (vol < 100) vol++;
 471                 } else {
 472                         if (vol >   0) vol--;
 473                 }
 474                 FrameworkAudio_SetVolume(vol, vol);
 475                 sprintf(noticeMsg, "VOL: %02i", vol);
 476                 noticeMsgTime = GetTickCount();
 477                 currentConfig.volume = vol;
 478         }
 479
 480         events &= ~prevEvents;
 481         if (events) RunEvents(events);
 482         if (movie_data) emu_updateMovie();
 483
 484         prevEvents = (allActions[0] | allActions[1]) >> 16;
 485 }
 486
 487 static void find_combos(void)
 488 {
 489         int act, u;
 490
 491         // find out which keys and actions are combos
 492         combo_keys = combo_acts = 0;
 493         for (act = 0; act < 32; act++)
 494         {
 495                 int keyc = 0;
 496                 if (act == 16 || act == 17) continue; // player2 flag
 497                 for (u = 0; u < 32; u++)
 498                 {
 499                         if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
 500                 }
 501                 if (keyc > 1)
 502                 {
 503                         // loop again and mark those keys and actions as combo
 504                         for (u = 0; u < 32; u++)
 505                         {
 506                                 if (currentConfig.KeyBinds[u] & (1 << act)) {
 507                                         combo_keys |= 1 << u;
 508                                         combo_acts |= 1 << act;
 509                                 }
 510                         }
 511                 }
 512         }
 513 }
 514
 515
 516 static void simpleWait(DWORD until)
 517 {
 518         DWORD tval;
 519         int diff;
 520
 521         tval = GetTickCount();
 522         diff = (int)until - (int)tval;
 523         if (diff >= 2)
 524                 Sleep(diff - 1);
 525
 526         while ((tval = GetTickCount()) < until && until - tval < 512) // some simple overflow detection
 527                 spend_cycles(1024*2);
 528 }
 529
 530 void emu_Loop(void)
 531 {
 532         static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
 533         char fpsbuff[24]; // fps count c string
 534         DWORD tval, tval_prev = 0, tval_thissec = 0; // timing
 535         int frames_done = 0, frames_shown = 0, oldmodes = 0, sec_ms = 1000;
 536         int target_fps, target_frametime, lim_time, tval_diff, i;
 537         char *notice = NULL;
 538
 539         lprintf("entered emu_Loop()\n");
 540
 541         fpsbuff[0] = 0;
 542
 543         // make sure we are in correct mode
 544         vidResetMode();
 545         if (currentConfig.scaling) PicoOpt|=0x4000;
 546         else PicoOpt&=~0x4000;
 547         Pico.m.dirtyPal = 1;
 548         oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
 549         find_combos();
 550
 551         // pal/ntsc might have changed, reset related stuff
 552         target_fps = Pico.m.pal ? 50 : 60;
 553         target_frametime = Pico.m.pal ? (1000<<8)/50 : (1000<<8)/60+1;
 554         reset_timing = 1;
 555
 556         // prepare CD buffer
 557         if (PicoMCD & 1) PicoCDBufferInit();
 558
 559         // prepare sound stuff
 560         PsndOut = NULL;
 561         if (currentConfig.EmuOpt & 4)
 562         {
 563                 int ret, snd_excess_add, stereo=(PicoOpt&8)>>3;
 564                 if (PsndRate != PsndRate_old || (PicoOpt&0x0b) != (PicoOpt_old&0x0b) || Pico.m.pal != pal_old) {
 565                         sound_rerate(Pico.m.frame_count ? 1 : 0);
 566                 }
 567                 snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
 568                 snd_cbuf_samples = (PsndRate<<stereo) * 16 / target_fps;
 569                 lprintf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
 570                         PsndRate, PsndLen, snd_excess_add, stereo, Pico.m.pal);
 571                 ret = FrameworkAudio_Init(PsndRate, snd_cbuf_samples, stereo);
 572                 if (ret != 0) {
 573                         lprintf("FrameworkAudio_Init() failed: %i\n", ret);
 574                         sprintf(noticeMsg, "sound init failed (%i), snd disabled", ret);
 575                         noticeMsgTime = GetTickCount();
 576                         currentConfig.EmuOpt &= ~4;
 577                 } else {
 578                         FrameworkAudio_SetVolume(currentConfig.volume, currentConfig.volume);
 579                         PicoWriteSound = updateSound;
 580                         snd_cbuff = FrameworkAudio_56448Buffer();
 581                         PsndOut = snd_cbuff + snd_cbuf_samples / 2; // start writing at the middle
 582                         snd_all_samples = 0;
 583                         PsndRate_old = PsndRate;
 584                         PicoOpt_old  = PicoOpt;
 585                         pal_old = Pico.m.pal;
 586                 }
 587         }
 588
 589         // loop?
 590         while (engineState == PGS_Running)
 591         {
 592                 int modes;
 593
 594                 tval = GetTickCount();
 595                 if (reset_timing || tval < tval_prev) {
 596                         stdbg("timing reset");
 597                         reset_timing = 0;
 598                         tval_thissec = tval;
 599                         frames_shown = frames_done = 0;
 600                 }
 601
 602                 // show notice message?
 603                 if (noticeMsgTime) {
 604                         static int noticeMsgSum;
 605                         if (tval - noticeMsgTime > 2000) { // > 2.0 sec
 606                                 noticeMsgTime = 0;
 607                                 clearArea(0);
 608                                 notice = 0;
 609                         } else {
 610                                 int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
 611                                 if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
 612                                 notice = noticeMsg;
 613                         }
 614                 }
 615
 616                 // check for mode changes
 617                 modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
 618                 if (modes != oldmodes) {
 619                         oldmodes = modes;
 620                         clearArea(1);
 621                 }
 622
 623                 // second passed?
 624                 if (tval - tval_thissec >= sec_ms)
 625                 {
 626 #ifdef BENCHMARK
 627                         static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
 628                         if(++bench == 10) {
 629                                 bench = 0;
 630                                 bench_fps_s = bench_fps;
 631                                 bf[bfp++ & 3] = bench_fps;
 632                                 bench_fps = 0;
 633                         }
 634                         bench_fps += frames_shown;
 635                         sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
 636 #else
 637                         if(currentConfig.EmuOpt & 2)
 638                                 sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
 639 #endif
 640                         //tval_thissec += 1000;
 641                         tval_thissec += sec_ms;
 642
 643                         if (PsndOut != NULL)
 644                         {
 645                                 /* some code which tries to sync things to audio clock, the dirty way */
 646                                 static int audio_skew_prev = 0;
 647                                 int audio_skew, adj, co = 9, shift = 7;
 648                                 audio_skew = snd_all_samples*2 - FrameworkAudio_BufferPos();
 649                                 if (PsndRate == 22050) co = 10;
 650                                 if (PsndRate  > 22050) co = 11;
 651                                 if (PicoOpt&8) shift++;
 652                                 if (audio_skew < 0) {
 653                                         adj = -((-audio_skew) >> shift);
 654                                         if (audio_skew > -(6<<co)) adj>>=1;
 655                                         if (audio_skew > -(4<<co)) adj>>=1;
 656                                         if (audio_skew > -(2<<co)) adj>>=1;
 657                                         if (audio_skew > audio_skew_prev) adj>>=2; // going up already
 658                                 } else {
 659                                         adj = audio_skew >> shift;
 660                                         if (audio_skew < (6<<co)) adj>>=1;
 661                                         if (audio_skew < (4<<co)) adj>>=1;
 662                                         if (audio_skew < (2<<co)) adj>>=1;
 663                                         if (audio_skew < audio_skew_prev) adj>>=2;
 664                                 }
 665                                 audio_skew_prev = audio_skew;
 666                                 target_frametime += adj;
 667                                 sec_ms = (target_frametime * target_fps) >> 8;
 668                                 stdbg("%i %i %i", audio_skew, adj, sec_ms);
 669                                 frames_done = frames_shown = 0;
 670                         }
 671                         else if (currentConfig.Frameskip < 0) {
 672                                 frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
 673                                 frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
 674                                 if (frames_shown > frames_done) frames_shown = frames_done;
 675                         } else {
 676                                 frames_done = frames_shown = 0;
 677                         }
 678                 }
 679 #ifdef PFRAMES
 680                 sprintf(fpsbuff, "%i", Pico.m.frame_count);
 681 #endif
 682
 683                 tval_prev = tval;
 684                 lim_time = (frames_done+1) * target_frametime;
 685                 if (currentConfig.Frameskip >= 0) // frameskip enabled
 686                 {
 687                         for (i = 0; i < currentConfig.Frameskip; i++) {
 688                                 updateKeys();
 689                                 SkipFrame(); frames_done++;
 690                                 if (PsndOut) { // do framelimitting if sound is enabled
 691                                         int tval_diff;
 692                                         tval = GetTickCount();
 693                                         tval_diff = (int)(tval - tval_thissec) << 8;
 694                                         if (tval_diff < lim_time) // we are too fast
 695                                                 simpleWait(tval + ((lim_time - tval_diff)>>8));
 696                                 }
 697                                 lim_time += target_frametime;
 698                         }
 699                 }
 700                 else // auto frameskip
 701                 {
 702                         int tval_diff;
 703                         tval = GetTickCount();
 704                         tval_diff = (int)(tval - tval_thissec) << 8;
 705                         if (tval_diff > lim_time)
 706                         {
 707                                 // no time left for this frame - skip
 708                                 if (tval_diff - lim_time >= (300<<8)) {
 709                                         /* something caused a slowdown for us (disk access? cache flush?)
 710                                          * try to recover by resetting timing... */
 711                                         reset_timing = 1;
 712                                         continue;
 713                                 }
 714                                 updateKeys();
 715                                 SkipFrame(); frames_done++;
 716                                 continue;
 717                         }
 718                 }
 719
 720                 updateKeys();
 721
 722                 if (giz_screen == NULL && (currentConfig.EmuOpt&0x80))
 723                         giz_screen = Framework2D_LockBuffer();
 724                 if (!(PicoOpt&0x10))
 725                         PicoScan((unsigned) -1, NULL);
 726
 727                 PicoFrame();
 728
 729                 if (currentConfig.EmuOpt&0x2000)
 730                         Framework2D_WaitVSync();
 731
 732                 if (giz_screen == NULL)
 733                         giz_screen = Framework2D_LockBuffer();
 734
 735                 blit(fpsbuff, notice);
 736
 737                 if (giz_screen != NULL) {
 738                         Framework2D_UnlockBuffer();
 739                         giz_screen = NULL;
 740                 }
 741
 742                 // check time
 743                 tval = GetTickCount();
 744                 tval_diff = (int)(tval - tval_thissec) << 8;
 745
 746                 if (currentConfig.Frameskip < 0 && tval_diff - lim_time >= (300<<8)) // slowdown detection
 747                         reset_timing = 1;
 748                 else if (PsndOut != NULL || currentConfig.Frameskip < 0)
 749                 {
 750                         // sleep if we are still too fast
 751                         if (tval_diff < lim_time)
 752                         {
 753                                 // we are too fast
 754                                 simpleWait(tval + ((lim_time - tval_diff) >> 8));
 755                         }
 756                 }
 757
 758                 frames_done++; frames_shown++;
 759         }
 760
 761
 762         if (PicoMCD & 1) PicoCDBufferFree();
 763
 764         if (PsndOut != NULL) {
 765                 PsndOut = snd_cbuff = NULL;
 766                 FrameworkAudio_Close();
 767         }
 768
 769         // save SRAM
 770         if ((currentConfig.EmuOpt & 1) && SRam.changed) {
 771                 emu_state_cb("Writing SRAM/BRAM..");
 772                 emu_SaveLoadGame(0, 1);
 773                 SRam.changed = 0;
 774         }
 775 }
 776
 777
 778 void emu_ResetGame(void)
 779 {
 780         PicoReset(0);
 781         reset_timing = 1;
 782 }
 783