gpu.c

   1 /***************************************************************************
   2                           gpu.c  -  description
   3                              -------------------
   4     begin                : Sun Oct 28 2001
   5     copyright            : (C) 2001 by Pete Bernert
   6     email                : BlackDove@addcom.de
   7  ***************************************************************************/
   8 /***************************************************************************
   9  *                                                                         *
  10  *   This program is free software; you can redistribute it and/or modify  *
  11  *   it under the terms of the GNU General Public License as published by  *
  12  *   the Free Software Foundation; either version 2 of the License, or     *
  13  *   (at your option) any later version. See also the license.txt file for *
  14  *   additional informations.                                              *
  15  *                                                                         *
  16  ***************************************************************************/
  17
  18 #include "gpu.h"
  19 #include "stdint.h"
  20 #include "psemu_plugin_defs.h"
  21
  22 ////////////////////////////////////////////////////////////////////////
  23 // memory image of the PSX vram
  24 ////////////////////////////////////////////////////////////////////////
  25
  26 unsigned char  *psxVSecure;
  27 unsigned char  *psxVub;
  28 signed   char  *psxVsb;
  29 unsigned short *psxVuw;
  30 unsigned short *psxVuw_eom;
  31 signed   short *psxVsw;
  32 uint32_t *psxVul;
  33 int32_t  *psxVsl;
  34
  35 ////////////////////////////////////////////////////////////////////////
  36 // GPU globals
  37 ////////////////////////////////////////////////////////////////////////
  38
  39 static long       lGPUdataRet;
  40 long              lGPUstatusRet;
  41 uint32_t          ulStatusControl[256];
  42
  43 static uint32_t gpuDataM[256];
  44 static unsigned   char gpuCommand = 0;
  45 static long       gpuDataC = 0;
  46 static long       gpuDataP = 0;
  47
  48 VRAMLoad_t        VRAMWrite;
  49 VRAMLoad_t        VRAMRead;
  50 DATAREGISTERMODES DataWriteMode;
  51 DATAREGISTERMODES DataReadMode;
  52
  53 BOOL              bSkipNextFrame = FALSE;
  54 DWORD             dwLaceCnt=0;
  55 short             sDispWidths[8] = {256,320,512,640,368,384,512,640};
  56 PSXDisplay_t      PSXDisplay;
  57 PSXDisplay_t      PreviousPSXDisplay;
  58 long              lSelectedSlot=0;
  59 BOOL              bDoLazyUpdate=FALSE;
  60 uint32_t          lGPUInfoVals[16];
  61 static int        iFakePrimBusy=0;
  62
  63 ////////////////////////////////////////////////////////////////////////
  64 // some misc external display funcs
  65 ////////////////////////////////////////////////////////////////////////
  66
  67 #include <time.h>
  68
  69 // FPS library
  70 #include "fps.c"
  71
  72
  73 ////////////////////////////////////////////////////////////////////////
  74 // sets all kind of act fixes
  75 ////////////////////////////////////////////////////////////////////////
  76
  77 static void SetFixes(void)
  78  {
  79   if(dwActFixes&0x02) sDispWidths[4]=384;
  80   else                sDispWidths[4]=368;
  81  }
  82
  83 ////////////////////////////////////////////////////////////////////////
  84 // INIT, will be called after lib load... well, just do some var init...
  85 ////////////////////////////////////////////////////////////////////////
  86
  87 long CALLBACK GPUinit(void)                                // GPU INIT
  88 {
  89  memset(ulStatusControl,0,256*sizeof(uint32_t));  // init save state scontrol field
  90
  91  psxVSecure = (unsigned char *)malloc((512*2)*1024 + (1024*1024)); // always alloc one extra MB for soft drawing funcs security
  92  if (!psxVSecure)
  93   return -1;
  94
  95  //!!! ATTENTION !!!
  96  psxVub=psxVSecure + 512 * 1024;                           // security offset into double sized psx vram!
  97
  98  psxVsb=(signed char *)psxVub;                         // different ways of accessing PSX VRAM
  99  psxVsw=(signed short *)psxVub;
 100  psxVsl=(int32_t *)psxVub;
 101  psxVuw=(unsigned short *)psxVub;
 102  psxVul=(uint32_t *)psxVub;
 103
 104  psxVuw_eom=psxVuw+1024*512;                    // pre-calc of end of vram
 105
 106  memset(psxVSecure,0x00,(512*2)*1024 + (1024*1024));
 107  memset(lGPUInfoVals,0x00,16*sizeof(uint32_t));
 108
 109  PSXDisplay.RGB24        = FALSE;                      // init some stuff
 110  PSXDisplay.Interlaced   = FALSE;
 111  PSXDisplay.DrawOffset.x = 0;
 112  PSXDisplay.DrawOffset.y = 0;
 113  PSXDisplay.DisplayMode.x= 320;
 114  PSXDisplay.DisplayMode.y= 240;
 115  PreviousPSXDisplay.DisplayMode.x= 320;
 116  PreviousPSXDisplay.DisplayMode.y= 240;
 117  PSXDisplay.Disabled     = FALSE;
 118  PreviousPSXDisplay.Range.x0 =0;
 119  PreviousPSXDisplay.Range.y0 =0;
 120  PSXDisplay.Range.x0=0;
 121  PSXDisplay.Range.x1=0;
 122  PreviousPSXDisplay.DisplayModeNew.y=0;
 123  PSXDisplay.Double = 1;
 124  lGPUdataRet = 0x400;
 125
 126  DataWriteMode = DR_NORMAL;
 127
 128  // Reset transfer values, to prevent mis-transfer of data
 129  memset(&VRAMWrite, 0, sizeof(VRAMLoad_t));
 130  memset(&VRAMRead, 0, sizeof(VRAMLoad_t));
 131
 132  // device initialised already !
 133  lGPUstatusRet = 0x14802000;
 134  GPUIsIdle;
 135  GPUIsReadyForCommands;
 136  bDoVSyncUpdate = TRUE;
 137
 138  return 0;
 139 }
 140
 141 ////////////////////////////////////////////////////////////////////////
 142 // Here starts all...
 143 ////////////////////////////////////////////////////////////////////////
 144
 145
 146 long GPUopen(unsigned long * disp,char * CapText,char * CfgFile)
 147 {
 148  unsigned long d;
 149
 150  SetFixes();
 151
 152  InitFPS();
 153
 154  bDoVSyncUpdate = TRUE;
 155
 156  d=ulInitDisplay();                                    // setup x
 157
 158  if(disp)
 159         *disp=d;                                     // wanna x pointer? ok
 160
 161  if(d) return 0;
 162  return -1;
 163 }
 164
 165
 166 ////////////////////////////////////////////////////////////////////////
 167 // time to leave...
 168 ////////////////////////////////////////////////////////////////////////
 169
 170 long CALLBACK GPUclose()                               // GPU CLOSE
 171 {
 172  CloseDisplay();                                       // shutdown direct draw
 173
 174  return 0;
 175 }
 176
 177 ////////////////////////////////////////////////////////////////////////
 178 // I shot the sheriff
 179 ////////////////////////////////////////////////////////////////////////
 180
 181 long CALLBACK GPUshutdown(void)                            // GPU SHUTDOWN
 182 {
 183  CloseDisplay();                                       // shutdown direct draw
 184  free(psxVSecure);
 185  return 0;                                             // nothinh to do
 186 }
 187
 188 ////////////////////////////////////////////////////////////////////////
 189 // Update display (swap buffers)
 190 ////////////////////////////////////////////////////////////////////////
 191
 192 static void updateDisplay(void)                               // UPDATE DISPLAY
 193 {
 194  if(PSXDisplay.Disabled)                               // disable?
 195   {
 196    return;                                             // -> and bye
 197   }
 198
 199  if(dwActFixes&32)                                     // pc fps calculation fix
 200   {
 201    if(UseFrameLimit) PCFrameCap();                     // -> brake
 202    if(UseFrameSkip) PCcalcfps();
 203   }
 204
 205  if(UseFrameSkip)                                      // skip ?
 206   {
 207    if(!bSkipNextFrame) DoBufferSwap();                 // -> to skip or not to skip
 208    if(dwActFixes&0xa0)                                 // -> pc fps calculation fix/old skipping fix
 209     {
 210      if((fps_skip < fFrameRateHz) && !(bSkipNextFrame))  // -> skip max one in a row
 211          {bSkipNextFrame = TRUE; fps_skip=fFrameRateHz;}
 212      else bSkipNextFrame = FALSE;
 213     }
 214    else FrameSkip();
 215   }
 216  else                                                  // no skip ?
 217   {
 218    bSkipNextFrame = FALSE;
 219    DoBufferSwap();                                     // -> swap
 220   }
 221
 222   bDoVSyncUpdate=FALSE;                                // vsync done
 223 }
 224
 225 ////////////////////////////////////////////////////////////////////////
 226 // roughly emulated screen centering bits... not complete !!!
 227 ////////////////////////////////////////////////////////////////////////
 228
 229 void ChangeDispOffsetsX(void)                          // X CENTER
 230 {
 231  long lx,l;
 232
 233  if(!PSXDisplay.Range.x1) return;
 234
 235  l=PreviousPSXDisplay.DisplayMode.x;
 236
 237  l*=(long)PSXDisplay.Range.x1;
 238  l/=2560;lx=l;l&=0xfffffff8;
 239
 240  if(l==PreviousPSXDisplay.Range.y1) return;            // abusing range.y1 for
 241  PreviousPSXDisplay.Range.y1=(short)l;                 // storing last x range and test
 242
 243  if(lx>=PreviousPSXDisplay.DisplayMode.x)
 244   {
 245    PreviousPSXDisplay.Range.x1=
 246     (short)PreviousPSXDisplay.DisplayMode.x;
 247    PreviousPSXDisplay.Range.x0=0;
 248   }
 249  else
 250   {
 251    PreviousPSXDisplay.Range.x1=(short)l;
 252
 253    PreviousPSXDisplay.Range.x0=
 254     (PSXDisplay.Range.x0-500)/8;
 255
 256    if(PreviousPSXDisplay.Range.x0<0)
 257     PreviousPSXDisplay.Range.x0=0;
 258
 259    if((PreviousPSXDisplay.Range.x0+lx)>
 260       PreviousPSXDisplay.DisplayMode.x)
 261     {
 262      PreviousPSXDisplay.Range.x0=
 263       (short)(PreviousPSXDisplay.DisplayMode.x-lx);
 264      PreviousPSXDisplay.Range.x0+=2; //???
 265
 266      PreviousPSXDisplay.Range.x1+=(short)(lx-l);
 267
 268      PreviousPSXDisplay.Range.x1-=2; // makes linux stretching easier
 269
 270     }
 271
 272    // some linux alignment security
 273    PreviousPSXDisplay.Range.x0=PreviousPSXDisplay.Range.x0>>1;
 274    PreviousPSXDisplay.Range.x0=PreviousPSXDisplay.Range.x0<<1;
 275    PreviousPSXDisplay.Range.x1=PreviousPSXDisplay.Range.x1>>1;
 276    PreviousPSXDisplay.Range.x1=PreviousPSXDisplay.Range.x1<<1;
 277
 278    DoClearScreenBuffer();
 279   }
 280
 281  bDoVSyncUpdate=TRUE;
 282 }
 283
 284 ////////////////////////////////////////////////////////////////////////
 285
 286 void ChangeDispOffsetsY(void)                          // Y CENTER
 287 {
 288  int iT,iO=PreviousPSXDisplay.Range.y0;
 289  int iOldYOffset=PreviousPSXDisplay.DisplayModeNew.y;
 290
 291 // new
 292
 293  if((PreviousPSXDisplay.DisplayModeNew.x+PSXDisplay.DisplayModeNew.y)>512)
 294   {
 295    int dy1=512-PreviousPSXDisplay.DisplayModeNew.x;
 296    int dy2=(PreviousPSXDisplay.DisplayModeNew.x+PSXDisplay.DisplayModeNew.y)-512;
 297
 298    if(dy1>=dy2)
 299     {
 300      PreviousPSXDisplay.DisplayModeNew.y=-dy2;
 301     }
 302    else
 303     {
 304      PSXDisplay.DisplayPosition.y=0;
 305      PreviousPSXDisplay.DisplayModeNew.y=-dy1;
 306     }
 307   }
 308  else PreviousPSXDisplay.DisplayModeNew.y=0;
 309
 310 // eon
 311
 312  if(PreviousPSXDisplay.DisplayModeNew.y!=iOldYOffset) // if old offset!=new offset: recalc height
 313   {
 314    PSXDisplay.Height = PSXDisplay.Range.y1 -
 315                        PSXDisplay.Range.y0 +
 316                        PreviousPSXDisplay.DisplayModeNew.y;
 317    PSXDisplay.DisplayModeNew.y=PSXDisplay.Height*PSXDisplay.Double;
 318   }
 319
 320 //
 321
 322  if(PSXDisplay.PAL) iT=48; else iT=28;
 323
 324  if(PSXDisplay.Range.y0>=iT)
 325   {
 326    PreviousPSXDisplay.Range.y0=
 327     (short)((PSXDisplay.Range.y0-iT-4)*PSXDisplay.Double);
 328    if(PreviousPSXDisplay.Range.y0<0)
 329     PreviousPSXDisplay.Range.y0=0;
 330    PSXDisplay.DisplayModeNew.y+=
 331     PreviousPSXDisplay.Range.y0;
 332   }
 333  else
 334   PreviousPSXDisplay.Range.y0=0;
 335
 336  if(iO!=PreviousPSXDisplay.Range.y0)
 337   {
 338    DoClearScreenBuffer();
 339  }
 340 }
 341
 342 ////////////////////////////////////////////////////////////////////////
 343 // check if update needed
 344 ////////////////////////////////////////////////////////////////////////
 345
 346 static void updateDisplayIfChanged(void)                      // UPDATE DISPLAY IF CHANGED
 347 {
 348  if ((PSXDisplay.DisplayMode.y == PSXDisplay.DisplayModeNew.y) &&
 349      (PSXDisplay.DisplayMode.x == PSXDisplay.DisplayModeNew.x))
 350   {
 351    if((PSXDisplay.RGB24      == PSXDisplay.RGB24New) &&
 352       (PSXDisplay.Interlaced == PSXDisplay.InterlacedNew)) return;
 353   }
 354
 355  PSXDisplay.RGB24         = PSXDisplay.RGB24New;       // get new infos
 356
 357  PSXDisplay.DisplayMode.y = PSXDisplay.DisplayModeNew.y;
 358  PSXDisplay.DisplayMode.x = PSXDisplay.DisplayModeNew.x;
 359  PreviousPSXDisplay.DisplayMode.x=                     // previous will hold
 360   min(640,PSXDisplay.DisplayMode.x);                   // max 640x512... that's
 361  PreviousPSXDisplay.DisplayMode.y=                     // the size of my
 362   min(512,PSXDisplay.DisplayMode.y);                   // back buffer surface
 363  PSXDisplay.Interlaced    = PSXDisplay.InterlacedNew;
 364
 365  PSXDisplay.DisplayEnd.x=                              // calc end of display
 366   PSXDisplay.DisplayPosition.x+ PSXDisplay.DisplayMode.x;
 367  PSXDisplay.DisplayEnd.y=
 368   PSXDisplay.DisplayPosition.y+ PSXDisplay.DisplayMode.y+PreviousPSXDisplay.DisplayModeNew.y;
 369  PreviousPSXDisplay.DisplayEnd.x=
 370   PreviousPSXDisplay.DisplayPosition.x+ PSXDisplay.DisplayMode.x;
 371  PreviousPSXDisplay.DisplayEnd.y=
 372   PreviousPSXDisplay.DisplayPosition.y+ PSXDisplay.DisplayMode.y+PreviousPSXDisplay.DisplayModeNew.y;
 373
 374  ChangeDispOffsetsX();
 375
 376  if(iFrameLimit==2) SetAutoFrameCap();                 // -> set it
 377
 378  if(UseFrameSkip) updateDisplay();                     // stupid stuff when frame skipping enabled
 379 }
 380
 381 ////////////////////////////////////////////////////////////////////////
 382 // update lace is called evry VSync
 383 ////////////////////////////////////////////////////////////////////////
 384
 385 void CALLBACK GPUupdateLace(void)                      // VSYNC
 386 {
 387  if(!(dwActFixes&1))
 388   lGPUstatusRet^=0x80000000;                           // odd/even bit
 389
 390  //pcsx-rearmed: removed, this is handled by core
 391  //if(!(dwActFixes&32))                                  // std fps limitation?
 392  // CheckFrameRate();
 393
 394  if(PSXDisplay.Interlaced)                             // interlaced mode?
 395   {
 396    if(bDoVSyncUpdate && PSXDisplay.DisplayMode.x>0 && PSXDisplay.DisplayMode.y>0)
 397     {
 398      updateDisplay();
 399     }
 400   }
 401  else                                                  // non-interlaced?
 402   {
 403    if(dwActFixes&64)                                   // lazy screen update fix
 404     {
 405      if(bDoLazyUpdate && !UseFrameSkip)
 406       updateDisplay();
 407      bDoLazyUpdate=FALSE;
 408     }
 409    else
 410     {
 411      if((bDoVSyncUpdate && !UseFrameSkip)              // some primitives drawn?
 412       || bDoVSyncUpdate >= 8)                          // not syned for a while
 413        updateDisplay();                                // -> update display
 414     }
 415   }
 416
 417  if(bDoVSyncUpdate)                                    // if display not synced
 418   bDoVSyncUpdate++;                                    // count how many times
 419 }
 420
 421 ////////////////////////////////////////////////////////////////////////
 422 // process read request from GPU status register
 423 ////////////////////////////////////////////////////////////////////////
 424
 425
 426 uint32_t CALLBACK GPUreadStatus(void)             // READ STATUS
 427 {
 428  if(dwActFixes&1)
 429   {
 430    static int iNumRead=0;                         // odd/even hack
 431    if((iNumRead++)==2)
 432     {
 433      iNumRead=0;
 434      lGPUstatusRet^=0x80000000;                   // interlaced bit toggle... we do it on every 3 read status... needed by some games (like ChronoCross) with old epsxe versions (1.5.2 and older)
 435     }
 436   }
 437
 438  if(iFakePrimBusy)                                // 27.10.2007 - PETE : emulating some 'busy' while drawing... pfff
 439   {
 440    iFakePrimBusy--;
 441
 442    if(iFakePrimBusy&1)                            // we do a busy-idle-busy-idle sequence after/while drawing prims
 443     {
 444      GPUIsBusy;
 445      GPUIsNotReadyForCommands;
 446     }
 447    else
 448     {
 449      GPUIsIdle;
 450      GPUIsReadyForCommands;
 451     }
 452   }
 453  return lGPUstatusRet;
 454 }
 455
 456 ////////////////////////////////////////////////////////////////////////
 457 // processes data send to GPU status register
 458 // these are always single packet commands.
 459 ////////////////////////////////////////////////////////////////////////
 460
 461 void CALLBACK GPUwriteStatus(uint32_t gdata)      // WRITE STATUS
 462 {
 463  uint32_t lCommand=(gdata>>24)&0xff;
 464
 465  ulStatusControl[lCommand]=gdata;                      // store command for freezing
 466
 467  switch(lCommand)
 468   {
 469    //--------------------------------------------------//
 470    // reset gpu
 471    case 0x00:
 472     memset(lGPUInfoVals,0x00,16*sizeof(uint32_t));
 473     lGPUstatusRet=0x14802000;
 474     PSXDisplay.Disabled=1;
 475     DataWriteMode=DataReadMode=DR_NORMAL;
 476     PSXDisplay.DrawOffset.x=PSXDisplay.DrawOffset.y=0;
 477     drawX=drawY=0;drawW=drawH=0;
 478     sSetMask=0;lSetMask=0;bCheckMask=FALSE;
 479     usMirror=0;
 480     GlobalTextAddrX=0;GlobalTextAddrY=0;
 481     GlobalTextTP=0;GlobalTextABR=0;
 482     PSXDisplay.RGB24=FALSE;
 483     PSXDisplay.Interlaced=FALSE;
 484     bUsingTWin = FALSE;
 485     return;
 486    //--------------------------------------------------//
 487    // dis/enable display
 488    case 0x03:
 489
 490     PreviousPSXDisplay.Disabled = PSXDisplay.Disabled;
 491     PSXDisplay.Disabled = (gdata & 1);
 492
 493     if(PSXDisplay.Disabled)
 494          lGPUstatusRet|=GPUSTATUS_DISPLAYDISABLED;
 495     else lGPUstatusRet&=~GPUSTATUS_DISPLAYDISABLED;
 496     return;
 497
 498    //--------------------------------------------------//
 499    // setting transfer mode
 500    case 0x04:
 501     gdata &= 0x03;                                     // Only want the lower two bits
 502
 503     DataWriteMode=DataReadMode=DR_NORMAL;
 504     if(gdata==0x02) DataWriteMode=DR_VRAMTRANSFER;
 505     if(gdata==0x03) DataReadMode =DR_VRAMTRANSFER;
 506     lGPUstatusRet&=~GPUSTATUS_DMABITS;                 // Clear the current settings of the DMA bits
 507     lGPUstatusRet|=(gdata << 29);                      // Set the DMA bits according to the received data
 508
 509     return;
 510    //--------------------------------------------------//
 511    // setting display position
 512    case 0x05:
 513     {
 514      PreviousPSXDisplay.DisplayPosition.x = PSXDisplay.DisplayPosition.x;
 515      PreviousPSXDisplay.DisplayPosition.y = PSXDisplay.DisplayPosition.y;
 516
 517 // new
 518      PSXDisplay.DisplayPosition.y = (short)((gdata>>10)&0x1ff);
 519
 520      // store the same val in some helper var, we need it on later compares
 521      PreviousPSXDisplay.DisplayModeNew.x=PSXDisplay.DisplayPosition.y;
 522
 523      if((PSXDisplay.DisplayPosition.y+PSXDisplay.DisplayMode.y)>512)
 524       {
 525        int dy1=512-PSXDisplay.DisplayPosition.y;
 526        int dy2=(PSXDisplay.DisplayPosition.y+PSXDisplay.DisplayMode.y)-512;
 527
 528        if(dy1>=dy2)
 529         {
 530          PreviousPSXDisplay.DisplayModeNew.y=-dy2;
 531         }
 532        else
 533         {
 534          PSXDisplay.DisplayPosition.y=0;
 535          PreviousPSXDisplay.DisplayModeNew.y=-dy1;
 536         }
 537       }
 538      else PreviousPSXDisplay.DisplayModeNew.y=0;
 539 // eon
 540
 541      PSXDisplay.DisplayPosition.x = (short)(gdata & 0x3ff);
 542      PSXDisplay.DisplayEnd.x=
 543       PSXDisplay.DisplayPosition.x+ PSXDisplay.DisplayMode.x;
 544      PSXDisplay.DisplayEnd.y=
 545       PSXDisplay.DisplayPosition.y+ PSXDisplay.DisplayMode.y + PreviousPSXDisplay.DisplayModeNew.y;
 546      PreviousPSXDisplay.DisplayEnd.x=
 547       PreviousPSXDisplay.DisplayPosition.x+ PSXDisplay.DisplayMode.x;
 548      PreviousPSXDisplay.DisplayEnd.y=
 549       PreviousPSXDisplay.DisplayPosition.y+ PSXDisplay.DisplayMode.y + PreviousPSXDisplay.DisplayModeNew.y;
 550
 551      bDoVSyncUpdate=TRUE;
 552
 553      if (!(PSXDisplay.Interlaced))                      // stupid frame skipping option
 554       {
 555        if(UseFrameSkip)  updateDisplay();
 556        if(dwActFixes&64) bDoLazyUpdate=TRUE;
 557       }
 558     }return;
 559    //--------------------------------------------------//
 560    // setting width
 561    case 0x06:
 562
 563     PSXDisplay.Range.x0=(short)(gdata & 0x7ff);
 564     PSXDisplay.Range.x1=(short)((gdata>>12) & 0xfff);
 565
 566     PSXDisplay.Range.x1-=PSXDisplay.Range.x0;
 567
 568     ChangeDispOffsetsX();
 569
 570     return;
 571    //--------------------------------------------------//
 572    // setting height
 573    case 0x07:
 574     {
 575
 576      PSXDisplay.Range.y0=(short)(gdata & 0x3ff);
 577      PSXDisplay.Range.y1=(short)((gdata>>10) & 0x3ff);
 578
 579      PreviousPSXDisplay.Height = PSXDisplay.Height;
 580
 581      PSXDisplay.Height = PSXDisplay.Range.y1 -
 582                          PSXDisplay.Range.y0 +
 583                          PreviousPSXDisplay.DisplayModeNew.y;
 584
 585      if(PreviousPSXDisplay.Height!=PSXDisplay.Height)
 586       {
 587        PSXDisplay.DisplayModeNew.y=PSXDisplay.Height*PSXDisplay.Double;
 588
 589        ChangeDispOffsetsY();
 590
 591        updateDisplayIfChanged();
 592       }
 593      return;
 594     }
 595    //--------------------------------------------------//
 596    // setting display infos
 597    case 0x08:
 598
 599     PSXDisplay.DisplayModeNew.x =
 600      sDispWidths[(gdata & 0x03) | ((gdata & 0x40) >> 4)];
 601
 602     if (gdata&0x04) PSXDisplay.Double=2;
 603     else            PSXDisplay.Double=1;
 604
 605     PSXDisplay.DisplayModeNew.y = PSXDisplay.Height*PSXDisplay.Double;
 606
 607     ChangeDispOffsetsY();
 608
 609     PSXDisplay.PAL           = (gdata & 0x08)?TRUE:FALSE; // if 1 - PAL mode, else NTSC
 610     PSXDisplay.RGB24New      = (gdata & 0x10)?TRUE:FALSE; // if 1 - TrueColor
 611     PSXDisplay.InterlacedNew = (gdata & 0x20)?TRUE:FALSE; // if 1 - Interlace
 612
 613     lGPUstatusRet&=~GPUSTATUS_WIDTHBITS;                   // Clear the width bits
 614     lGPUstatusRet|=
 615                (((gdata & 0x03) << 17) |
 616                ((gdata & 0x40) << 10));                // Set the width bits
 617
 618     if(PSXDisplay.InterlacedNew)
 619      {
 620       if(!PSXDisplay.Interlaced)
 621        {
 622         PreviousPSXDisplay.DisplayPosition.x = PSXDisplay.DisplayPosition.x;
 623         PreviousPSXDisplay.DisplayPosition.y = PSXDisplay.DisplayPosition.y;
 624        }
 625       lGPUstatusRet|=GPUSTATUS_INTERLACED;
 626      }
 627     else lGPUstatusRet&=~GPUSTATUS_INTERLACED;
 628
 629     if (PSXDisplay.PAL)
 630          lGPUstatusRet|=GPUSTATUS_PAL;
 631     else lGPUstatusRet&=~GPUSTATUS_PAL;
 632
 633     if (PSXDisplay.Double==2)
 634          lGPUstatusRet|=GPUSTATUS_DOUBLEHEIGHT;
 635     else lGPUstatusRet&=~GPUSTATUS_DOUBLEHEIGHT;
 636
 637     if (PSXDisplay.RGB24New)
 638          lGPUstatusRet|=GPUSTATUS_RGB24;
 639     else lGPUstatusRet&=~GPUSTATUS_RGB24;
 640
 641     updateDisplayIfChanged();
 642
 643     return;
 644    //--------------------------------------------------//
 645    // ask about GPU version and other stuff
 646    case 0x10:
 647
 648     gdata&=0xff;
 649
 650     switch(gdata)
 651      {
 652       case 0x02:
 653        lGPUdataRet=lGPUInfoVals[INFO_TW];              // tw infos
 654        return;
 655       case 0x03:
 656        lGPUdataRet=lGPUInfoVals[INFO_DRAWSTART];       // draw start
 657        return;
 658       case 0x04:
 659        lGPUdataRet=lGPUInfoVals[INFO_DRAWEND];         // draw end
 660        return;
 661       case 0x05:
 662       case 0x06:
 663        lGPUdataRet=lGPUInfoVals[INFO_DRAWOFF];         // draw offset
 664        return;
 665       case 0x07:
 666        lGPUdataRet=0x02;                               // gpu type
 667        return;
 668       case 0x08:
 669       case 0x0F:                                       // some bios addr?
 670        lGPUdataRet=0xBFC03720;
 671        return;
 672      }
 673     return;
 674    //--------------------------------------------------//
 675   }
 676 }
 677
 678 ////////////////////////////////////////////////////////////////////////
 679 // vram read/write helpers, needed by LEWPY's optimized vram read/write :)
 680 ////////////////////////////////////////////////////////////////////////
 681
 682 static inline void FinishedVRAMWrite(void)
 683 {
 684  // Set register to NORMAL operation
 685  DataWriteMode = DR_NORMAL;
 686  // Reset transfer values, to prevent mis-transfer of data
 687  VRAMWrite.x = 0;
 688  VRAMWrite.y = 0;
 689  VRAMWrite.Width = 0;
 690  VRAMWrite.Height = 0;
 691  VRAMWrite.ColsRemaining = 0;
 692  VRAMWrite.RowsRemaining = 0;
 693 }
 694
 695 static inline void FinishedVRAMRead(void)
 696 {
 697  // Set register to NORMAL operation
 698  DataReadMode = DR_NORMAL;
 699  // Reset transfer values, to prevent mis-transfer of data
 700  VRAMRead.x = 0;
 701  VRAMRead.y = 0;
 702  VRAMRead.Width = 0;
 703  VRAMRead.Height = 0;
 704  VRAMRead.ColsRemaining = 0;
 705  VRAMRead.RowsRemaining = 0;
 706
 707  // Indicate GPU is no longer ready for VRAM data in the STATUS REGISTER
 708  lGPUstatusRet&=~GPUSTATUS_READYFORVRAM;
 709 }
 710
 711 ////////////////////////////////////////////////////////////////////////
 712 // core read from vram
 713 ////////////////////////////////////////////////////////////////////////
 714
 715 void CALLBACK GPUreadDataMem(uint32_t * pMem, int iSize)
 716 {
 717  int i;
 718
 719  if(DataReadMode!=DR_VRAMTRANSFER) return;
 720
 721  GPUIsBusy;
 722
 723  // adjust read ptr, if necessary
 724  while(VRAMRead.ImagePtr>=psxVuw_eom)
 725   VRAMRead.ImagePtr-=512*1024;
 726  while(VRAMRead.ImagePtr<psxVuw)
 727   VRAMRead.ImagePtr+=512*1024;
 728
 729  for(i=0;i<iSize;i++)
 730   {
 731    // do 2 seperate 16bit reads for compatibility (wrap issues)
 732    if ((VRAMRead.ColsRemaining > 0) && (VRAMRead.RowsRemaining > 0))
 733     {
 734      // lower 16 bit
 735      lGPUdataRet=(uint32_t)GETLE16(VRAMRead.ImagePtr);
 736
 737      VRAMRead.ImagePtr++;
 738      if(VRAMRead.ImagePtr>=psxVuw_eom) VRAMRead.ImagePtr-=512*1024;
 739      VRAMRead.RowsRemaining --;
 740
 741      if(VRAMRead.RowsRemaining<=0)
 742       {
 743        VRAMRead.RowsRemaining = VRAMRead.Width;
 744        VRAMRead.ColsRemaining--;
 745        VRAMRead.ImagePtr += 1024 - VRAMRead.Width;
 746        if(VRAMRead.ImagePtr>=psxVuw_eom) VRAMRead.ImagePtr-=512*1024;
 747       }
 748
 749      // higher 16 bit (always, even if it's an odd width)
 750      lGPUdataRet|=(uint32_t)GETLE16(VRAMRead.ImagePtr)<<16;
 751      PUTLE32(pMem, lGPUdataRet); pMem++;
 752
 753      if(VRAMRead.ColsRemaining <= 0)
 754       {FinishedVRAMRead();goto ENDREAD;}
 755
 756      VRAMRead.ImagePtr++;
 757      if(VRAMRead.ImagePtr>=psxVuw_eom) VRAMRead.ImagePtr-=512*1024;
 758      VRAMRead.RowsRemaining--;
 759      if(VRAMRead.RowsRemaining<=0)
 760       {
 761        VRAMRead.RowsRemaining = VRAMRead.Width;
 762        VRAMRead.ColsRemaining--;
 763        VRAMRead.ImagePtr += 1024 - VRAMRead.Width;
 764        if(VRAMRead.ImagePtr>=psxVuw_eom) VRAMRead.ImagePtr-=512*1024;
 765       }
 766      if(VRAMRead.ColsRemaining <= 0)
 767       {FinishedVRAMRead();goto ENDREAD;}
 768     }
 769    else {FinishedVRAMRead();goto ENDREAD;}
 770   }
 771
 772 ENDREAD:
 773  GPUIsIdle;
 774 }
 775
 776
 777 ////////////////////////////////////////////////////////////////////////
 778
 779 uint32_t CALLBACK GPUreadData(void)
 780 {
 781  uint32_t l;
 782  GPUreadDataMem(&l,1);
 783  return lGPUdataRet;
 784 }
 785
 786 // Software drawing function
 787 #include "soft.c"
 788
 789 // PSX drawing primitives
 790 #include "prim.c"
 791
 792 ////////////////////////////////////////////////////////////////////////
 793 // processes data send to GPU data register
 794 // extra table entries for fixing polyline troubles
 795 ////////////////////////////////////////////////////////////////////////
 796
 797 static const unsigned char primTableCX[256] =
 798 {
 799     // 00
 800     0,0,3,0,0,0,0,0,
 801     // 08
 802     0,0,0,0,0,0,0,0,
 803     // 10
 804     0,0,0,0,0,0,0,0,
 805     // 18
 806     0,0,0,0,0,0,0,0,
 807     // 20
 808     4,4,4,4,7,7,7,7,
 809     // 28
 810     5,5,5,5,9,9,9,9,
 811     // 30
 812     6,6,6,6,9,9,9,9,
 813     // 38
 814     8,8,8,8,12,12,12,12,
 815     // 40
 816     3,3,3,3,0,0,0,0,
 817     // 48
 818 //  5,5,5,5,6,6,6,6,    // FLINE
 819     254,254,254,254,254,254,254,254,
 820     // 50
 821     4,4,4,4,0,0,0,0,
 822     // 58
 823 //  7,7,7,7,9,9,9,9,    // GLINE
 824     255,255,255,255,255,255,255,255,
 825     // 60
 826     3,3,3,3,4,4,4,4,
 827     // 68
 828     2,2,2,2,3,3,3,3,    // 3=SPRITE1???
 829     // 70
 830     2,2,2,2,3,3,3,3,
 831     // 78
 832     2,2,2,2,3,3,3,3,
 833     // 80
 834     4,0,0,0,0,0,0,0,
 835     // 88
 836     0,0,0,0,0,0,0,0,
 837     // 90
 838     0,0,0,0,0,0,0,0,
 839     // 98
 840     0,0,0,0,0,0,0,0,
 841     // a0
 842     3,0,0,0,0,0,0,0,
 843     // a8
 844     0,0,0,0,0,0,0,0,
 845     // b0
 846     0,0,0,0,0,0,0,0,
 847     // b8
 848     0,0,0,0,0,0,0,0,
 849     // c0
 850     3,0,0,0,0,0,0,0,
 851     // c8
 852     0,0,0,0,0,0,0,0,
 853     // d0
 854     0,0,0,0,0,0,0,0,
 855     // d8
 856     0,0,0,0,0,0,0,0,
 857     // e0
 858     0,1,1,1,1,1,1,0,
 859     // e8
 860     0,0,0,0,0,0,0,0,
 861     // f0
 862     0,0,0,0,0,0,0,0,
 863     // f8
 864     0,0,0,0,0,0,0,0
 865 };
 866
 867 void CALLBACK GPUwriteDataMem(uint32_t * pMem, int iSize)
 868 {
 869  unsigned char command;
 870  uint32_t gdata=0;
 871  int i=0;
 872  GPUIsBusy;
 873  GPUIsNotReadyForCommands;
 874
 875 STARTVRAM:
 876
 877  if(DataWriteMode==DR_VRAMTRANSFER)
 878   {
 879    BOOL bFinished=FALSE;
 880
 881    // make sure we are in vram
 882    while(VRAMWrite.ImagePtr>=psxVuw_eom)
 883     VRAMWrite.ImagePtr-=512*1024;
 884    while(VRAMWrite.ImagePtr<psxVuw)
 885     VRAMWrite.ImagePtr+=512*1024;
 886
 887    // now do the loop
 888    while(VRAMWrite.ColsRemaining>0)
 889     {
 890      while(VRAMWrite.RowsRemaining>0)
 891       {
 892        if(i>=iSize) {goto ENDVRAM;}
 893        i++;
 894
 895        gdata=GETLE32(pMem); pMem++;
 896
 897        PUTLE16(VRAMWrite.ImagePtr, (unsigned short)gdata); VRAMWrite.ImagePtr++;
 898        if(VRAMWrite.ImagePtr>=psxVuw_eom) VRAMWrite.ImagePtr-=512*1024;
 899        VRAMWrite.RowsRemaining --;
 900
 901        if(VRAMWrite.RowsRemaining <= 0)
 902         {
 903          VRAMWrite.ColsRemaining--;
 904          if (VRAMWrite.ColsRemaining <= 0)             // last pixel is odd width
 905           {
 906            gdata=(gdata&0xFFFF)|(((uint32_t)GETLE16(VRAMWrite.ImagePtr))<<16);
 907            FinishedVRAMWrite();
 908            bDoVSyncUpdate=TRUE;
 909            goto ENDVRAM;
 910           }
 911          VRAMWrite.RowsRemaining = VRAMWrite.Width;
 912          VRAMWrite.ImagePtr += 1024 - VRAMWrite.Width;
 913         }
 914
 915        PUTLE16(VRAMWrite.ImagePtr, (unsigned short)(gdata>>16)); VRAMWrite.ImagePtr++;
 916        if(VRAMWrite.ImagePtr>=psxVuw_eom) VRAMWrite.ImagePtr-=512*1024;
 917        VRAMWrite.RowsRemaining --;
 918       }
 919
 920      VRAMWrite.RowsRemaining = VRAMWrite.Width;
 921      VRAMWrite.ColsRemaining--;
 922      VRAMWrite.ImagePtr += 1024 - VRAMWrite.Width;
 923      bFinished=TRUE;
 924     }
 925
 926    FinishedVRAMWrite();
 927    if(bFinished) bDoVSyncUpdate=TRUE;
 928   }
 929
 930 ENDVRAM:
 931
 932  if(DataWriteMode==DR_NORMAL)
 933   {
 934    void (* *primFunc)(unsigned char *);
 935    if(bSkipNextFrame) primFunc=primTableSkip;
 936    else               primFunc=primTableJ;
 937
 938    for(;i<iSize;)
 939     {
 940      if(DataWriteMode==DR_VRAMTRANSFER) goto STARTVRAM;
 941
 942      gdata=GETLE32(pMem); pMem++; i++;
 943
 944      if(gpuDataC == 0)
 945       {
 946        command = (unsigned char)((gdata>>24) & 0xff);
 947
 948 //if(command>=0xb0 && command<0xc0) auxprintf("b0 %x!!!!!!!!!\n",command);
 949
 950        if(primTableCX[command])
 951         {
 952          gpuDataC = primTableCX[command];
 953          gpuCommand = command;
 954          PUTLE32_(&gpuDataM[0], gdata);
 955          gpuDataP = 1;
 956         }
 957        else continue;
 958       }
 959      else
 960       {
 961        PUTLE32_(&gpuDataM[gpuDataP], gdata);
 962        if(gpuDataC>128)
 963         {
 964          if((gpuDataC==254 && gpuDataP>=3) ||
 965             (gpuDataC==255 && gpuDataP>=4 && !(gpuDataP&1)))
 966           {
 967            if((gpuDataM[gpuDataP] & 0xF000F000) == 0x50005000)
 968             gpuDataP=gpuDataC-1;
 969           }
 970         }
 971        gpuDataP++;
 972       }
 973
 974      if(gpuDataP == gpuDataC)
 975       {
 976        gpuDataC=gpuDataP=0;
 977        primFunc[gpuCommand]((unsigned char *)gpuDataM);
 978        if(dwActFixes&0x0400)      // hack for emulating "gpu busy" in some games
 979         iFakePrimBusy=4;
 980       }
 981     }
 982   }
 983
 984  lGPUdataRet=gdata;
 985
 986  GPUIsReadyForCommands;
 987  GPUIsIdle;
 988 }
 989
 990 ////////////////////////////////////////////////////////////////////////
 991
 992 void CALLBACK GPUwriteData(uint32_t gdata)
 993 {
 994  PUTLE32_(&gdata, gdata);
 995  GPUwriteDataMem(&gdata,1);
 996 }
 997
 998 ////////////////////////////////////////////////////////////////////////
 999 // process gpu commands
1000 ////////////////////////////////////////////////////////////////////////
1001
1002 unsigned long lUsedAddr[3];
1003
1004 static inline BOOL CheckForEndlessLoop(unsigned long laddr)
1005 {
1006  if(laddr==lUsedAddr[1]) return TRUE;
1007  if(laddr==lUsedAddr[2]) return TRUE;
1008
1009  if(laddr<lUsedAddr[0]) lUsedAddr[1]=laddr;
1010  else                   lUsedAddr[2]=laddr;
1011  lUsedAddr[0]=laddr;
1012  return FALSE;
1013 }
1014
1015 long CALLBACK GPUdmaChain(uint32_t * baseAddrL, uint32_t addr)
1016 {
1017  uint32_t dmaMem;
1018  unsigned char * baseAddrB;
1019  short count;unsigned int DMACommandCounter = 0;
1020
1021  GPUIsBusy;
1022
1023  lUsedAddr[0]=lUsedAddr[1]=lUsedAddr[2]=0xffffff;
1024
1025  baseAddrB = (unsigned char*) baseAddrL;
1026
1027  do
1028   {
1029    addr&=0x1FFFFC;
1030    if(DMACommandCounter++ > 2000000) break;
1031    if(CheckForEndlessLoop(addr)) break;
1032
1033    count = baseAddrB[addr+3];
1034
1035    dmaMem=addr+4;
1036
1037    if(count>0) GPUwriteDataMem(&baseAddrL[dmaMem>>2],count);
1038
1039    addr = GETLE32(&baseAddrL[addr>>2])&0xffffff;
1040   }
1041  while (addr != 0xffffff);
1042
1043  GPUIsIdle;
1044
1045  return 0;
1046 }
1047
1048 ////////////////////////////////////////////////////////////////////////
1049 // Freeze
1050 ////////////////////////////////////////////////////////////////////////
1051
1052 typedef struct GPUFREEZETAG
1053 {
1054  uint32_t ulFreezeVersion;      // should be always 1 for now (set by main emu)
1055  uint32_t ulStatus;             // current gpu status
1056  uint32_t ulControl[256];       // latest control register values
1057  unsigned char psxVRam[1024*1024*2]; // current VRam image (full 2 MB for ZN)
1058 } GPUFreeze_t;
1059
1060 ////////////////////////////////////////////////////////////////////////
1061
1062 long CALLBACK GPUfreeze(uint32_t ulGetFreezeData,GPUFreeze_t * pF)
1063 {
1064  //----------------------------------------------------//
1065  if(ulGetFreezeData==2)                                // 2: info, which save slot is selected? (just for display)
1066   {
1067    long lSlotNum=*((long *)pF);
1068    if(lSlotNum<0) return 0;
1069    if(lSlotNum>8) return 0;
1070    lSelectedSlot=lSlotNum+1;
1071    return 1;
1072   }
1073  //----------------------------------------------------//
1074  if(!pF)                    return 0;                  // some checks
1075  if(pF->ulFreezeVersion!=1) return 0;
1076
1077  if(ulGetFreezeData==1)                                // 1: get data
1078   {
1079    pF->ulStatus=lGPUstatusRet;
1080    memcpy(pF->ulControl,ulStatusControl,256*sizeof(uint32_t));
1081    memcpy(pF->psxVRam,  psxVub,         1024*512*2);
1082
1083    return 1;
1084   }
1085
1086  if(ulGetFreezeData!=0) return 0;                      // 0: set data
1087
1088  lGPUstatusRet=pF->ulStatus;
1089  memcpy(ulStatusControl,pF->ulControl,256*sizeof(uint32_t));
1090  memcpy(psxVub,         pF->psxVRam,  1024*512*2);
1091
1092 // RESET TEXTURE STORE HERE, IF YOU USE SOMETHING LIKE THAT
1093
1094  GPUwriteStatus(ulStatusControl[0]);
1095  GPUwriteStatus(ulStatusControl[1]);
1096  GPUwriteStatus(ulStatusControl[2]);
1097  GPUwriteStatus(ulStatusControl[3]);
1098  GPUwriteStatus(ulStatusControl[8]);                   // try to repair things
1099  GPUwriteStatus(ulStatusControl[6]);
1100  GPUwriteStatus(ulStatusControl[7]);
1101  GPUwriteStatus(ulStatusControl[5]);
1102  GPUwriteStatus(ulStatusControl[4]);
1103
1104  return 1;
1105 }