fce.c

   1 /* FCE Ultra - NES/Famicom Emulator
   2  *
   3  * Copyright notice for this file:
   4  *  Copyright (C) 1998 BERO
   5  *  Copyright (C) 2002 Ben Parnell
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include        <string.h>
  23 #include        <stdio.h>
  24 #include        <stdlib.h>
  25
  26 #include        "types.h"
  27 #include        "x6502.h"
  28 #include        "fce.h"
  29 #include        "sound.h"
  30 #include        "svga.h"
  31 #include        "netplay.h"
  32 #include        "general.h"
  33 #include        "endian.h"
  34 #include        "version.h"
  35 #include        "memory.h"
  36
  37 #include        "cart.h"
  38 #include        "nsf.h"
  39 #include        "fds.h"
  40 #include        "ines.h"
  41 #include        "unif.h"
  42 #include        "cheat.h"
  43
  44 #include        "state.h"
  45 #include        "video.h"
  46 #include        "input.h"
  47 #include        "file.h"
  48 #include        "crc32.h"
  49 #include        "ppu.h"
  50
  51 #define Pal     (PALRAM)
  52
  53
  54 static void FASTAPASS(1) RefreshLine(uint8 *target);
  55 static void PRefreshLine(void);
  56
  57 static void ResetPPU(void);
  58 static void PowerPPU(void);
  59
  60 uint64 timestampbase=0;
  61
  62 int MMC5Hack;
  63 uint32 MMC5HackVROMMask;
  64 uint8 *MMC5HackExNTARAMPtr;
  65 uint8 *MMC5HackVROMPTR;
  66 uint8 MMC5HackCHRMode=0;
  67 uint8 MMC5HackSPMode;
  68 uint8 MMC5HackSPScroll;
  69 uint8 MMC5HackSPPage;
  70
  71 uint8 *MMC5SPRVPage[8];
  72 uint8 *MMC5BGVPage[8];
  73
  74
  75 uint8 VRAMBuffer,PPUGenLatch;
  76
  77 uint8 *vnapage[4];
  78 uint8 PPUNTARAM;
  79 uint8 PPUCHRRAM;
  80
  81 /* Color deemphasis emulation.  Joy... */
  82 static uint8 deemp=0;
  83 static int deempcnt[8];
  84
  85 int tosprite=256;
  86
  87 FCEUGI FCEUGameInfo;
  88 void (*GameInterface)(int h);
  89
  90 void FP_FASTAPASS(1) (*PPU_hook)(uint32 A);
  91
  92 void (*GameStateRestore)(int version);
  93 void (*GameHBIRQHook)(void);
  94
  95 readfunc ARead[0x10000];
  96 writefunc BWrite[0x10000];
  97 static readfunc *AReadG;
  98 static writefunc *BWriteG;
  99 static int RWWrap=0;
 100
 101 DECLFW(BNull)
 102 {
 103
 104 }
 105
 106 DECLFR(ANull)
 107 {
 108  return(X.DB);
 109 }
 110
 111 int AllocGenieRW(void)
 112 {
 113  if(!(AReadG=FCEU_malloc(0x8000*sizeof(readfunc))))
 114   return 0;
 115  if(!(BWriteG=FCEU_malloc(0x8000*sizeof(writefunc))))
 116   return 0;
 117  RWWrap=1;
 118  return 1;
 119 }
 120
 121 void FlushGenieRW(void)
 122 {
 123  int32 x;
 124
 125  if(RWWrap)
 126  {
 127   for(x=0;x<0x8000;x++)
 128   {
 129    ARead[x+0x8000]=AReadG[x];
 130    BWrite[x+0x8000]=BWriteG[x];
 131   }
 132   free(AReadG);
 133   free(BWriteG);
 134   AReadG=0;
 135   BWriteG=0;
 136   RWWrap=0;
 137  }
 138 }
 139
 140 readfunc FASTAPASS(1) GetReadHandler(int32 a)
 141 {
 142   if(a>=0x8000 && RWWrap)
 143    return AReadG[a-0x8000];
 144   else
 145    return ARead[a];
 146 }
 147
 148 void FASTAPASS(3) SetReadHandler(int32 start, int32 end, readfunc func)
 149 {
 150   int32 x;
 151
 152   if(!func)
 153    func=ANull;
 154
 155   if(RWWrap)
 156    for(x=end;x>=start;x--)
 157    {
 158     if(x>=0x8000)
 159      AReadG[x-0x8000]=func;
 160     else
 161      ARead[x]=func;
 162    }
 163   else
 164
 165    for(x=end;x>=start;x--)
 166     ARead[x]=func;
 167 }
 168
 169 writefunc FASTAPASS(1) GetWriteHandler(int32 a)
 170 {
 171   if(RWWrap && a>=0x8000)
 172    return BWriteG[a-0x8000];
 173   else
 174    return BWrite[a];
 175 }
 176
 177 void FASTAPASS(3) SetWriteHandler(int32 start, int32 end, writefunc func)
 178 {
 179   int32 x;
 180
 181   if(!func)
 182    func=BNull;
 183
 184   if(RWWrap)
 185    for(x=end;x>=start;x--)
 186    {
 187     if(x>=0x8000)
 188      BWriteG[x-0x8000]=func;
 189     else
 190      BWrite[x]=func;
 191    }
 192   else
 193    for(x=end;x>=start;x--)
 194     BWrite[x]=func;
 195 }
 196
 197 uint8 vtoggle=0;
 198 uint8 XOffset=0;
 199
 200 uint32 TempAddr,RefreshAddr;
 201
 202
 203 /* scanline is equal to the current visible scanline we're on. */
 204
 205 int scanline;
 206 static uint32 scanlines_per_frame;
 207
 208 uint8 PPU[4];
 209 uint8 PPUSPL;
 210
 211 uint8 GameMemBlock[131072];
 212 uint8 NTARAM[0x800],PALRAM[0x20];
 213 uint8 RAM[0x800];
 214
 215 uint8 PAL=0;
 216
 217
 218 #define MMC5BGVRAMADR(V)      &MMC5BGVPage[(V)>>10][(V)]
 219 #define VRAMADR(V)      &VPage[(V)>>10][(V)]
 220
 221 static DECLFW(BRAML)
 222 {
 223         RAM[A]=V;
 224 }
 225
 226 static DECLFW(BRAMH)
 227 {
 228         RAM[A&0x7FF]=V;
 229 }
 230
 231 static DECLFR(ARAML)
 232 {
 233         return RAM[A];
 234 }
 235
 236 static DECLFR(ARAMH)
 237 {
 238         return RAM[A&0x7FF];
 239 }
 240
 241
 242 static DECLFR(A2002)
 243 {
 244                         uint8 ret;
 245                         ret = PPU_status;
 246                         vtoggle=0;
 247                         PPU_status&=0x7F;
 248                         return ret|(PPUGenLatch&0x1F);
 249 }
 250
 251 static DECLFR(A200x)
 252 {
 253                         return PPUGenLatch;
 254 }
 255
 256 static DECLFR(A2007)
 257 {
 258                         uint8 ret;
 259                         uint32 tmp=RefreshAddr&0x3FFF;
 260
 261                         PPUGenLatch=ret=VRAMBuffer;
 262                         if(PPU_hook) PPU_hook(tmp);
 263                         if(tmp<0x2000)
 264                         {
 265                          VRAMBuffer=VPage[tmp>>10][tmp];
 266                         }
 267                         else
 268                         {
 269                          VRAMBuffer=vnapage[(tmp>>10)&0x3][tmp&0x3FF];
 270                         }
 271
 272                         if (INC32) RefreshAddr+=32;
 273                         else RefreshAddr++;
 274                         if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
 275                         return ret;
 276 }
 277
 278 static DECLFW(B2000)
 279 {
 280                 PPUGenLatch=V;
 281                 PPU[0]=V;
 282                 TempAddr&=0xF3FF;
 283                 TempAddr|=(V&3)<<10;
 284 }
 285
 286 static DECLFW(B2001)
 287 {
 288                   PPUGenLatch=V;
 289                   PPU[1]=V;
 290                   if(V&0xE0)
 291                    deemp=V>>5;
 292                   //printf("$%04x:$%02x, %d\n",X.PC,V,scanline);
 293 }
 294
 295 static DECLFW(B2002)
 296 {
 297                  PPUGenLatch=V;
 298 }
 299
 300 static DECLFW(B2003)
 301 {
 302                 PPUGenLatch=V;
 303                 PPU[3]=V;
 304                 PPUSPL=V&0x7;
 305 }
 306
 307 static DECLFW(B2004)
 308 {
 309                 PPUGenLatch=V;
 310                 //SPRAM[PPU[3]++]=V;
 311                 if(PPUSPL&8)
 312                 {
 313                  if(PPU[3]>=8)
 314                   SPRAM[PPU[3]]=V;
 315                 }
 316                 else
 317                 {
 318                  //printf("$%02x:$%02x\n",PPUSPL,V);
 319                  SPRAM[PPUSPL]=V;
 320                  PPUSPL++;
 321                 }
 322                 PPU[3]++;
 323
 324 }
 325
 326 static DECLFW(B2005)
 327 {
 328                 uint32 tmp=TempAddr;
 329
 330                 PPUGenLatch=V;
 331                 if (!vtoggle)
 332                 {
 333                  tmp&=0xFFE0;
 334                  tmp|=V>>3;
 335                  XOffset=V&7;
 336                 }
 337                 else
 338                 {
 339                  tmp&=0x8C1F;
 340                  tmp|=((V&~0x7)<<2);
 341                  tmp|=(V&7)<<12;
 342                 }
 343
 344                 TempAddr=tmp;
 345                 vtoggle^=1;
 346 }
 347
 348 static DECLFW(B2006)
 349 {
 350                        PPUGenLatch=V;
 351                        if(!vtoggle)
 352                        {
 353                         TempAddr&=0x00FF;
 354                         TempAddr|=(V&0x3f)<<8;
 355                        }
 356                        else
 357                        {
 358                         TempAddr&=0xFF00;
 359                         TempAddr|=V;
 360                         RefreshAddr=TempAddr;
 361
 362                         if(PPU_hook)
 363                          PPU_hook(RefreshAddr);
 364                        }
 365                       vtoggle^=1;
 366 }
 367
 368 static DECLFW(B2007)
 369 {
 370                         uint32 tmp=RefreshAddr&0x3FFF;
 371
 372                         PPUGenLatch=V;
 373                         if(tmp>=0x3F00)
 374                         {
 375                         // hmmm....
 376                         if(!(tmp&0xf))
 377                          PALRAM[0x00]=PALRAM[0x04]=PALRAM[0x08]=PALRAM[0x0C]=
 378                          PALRAM[0x10]=PALRAM[0x14]=PALRAM[0x18]=PALRAM[0x1c]=V&0x3f;
 379                         else if(tmp&3) PALRAM[(tmp&0x1f)]=V&0x3f;
 380                         }
 381                         else if(tmp<0x2000)
 382                         {
 383                           if(PPUCHRRAM&(1<<(tmp>>10)))
 384                             VPage[tmp>>10][tmp]=V;
 385                         }
 386                         else
 387                         {
 388                          if(PPUNTARAM&(1<<((tmp&0xF00)>>10)))
 389                           vnapage[((tmp&0xF00)>>10)][tmp&0x3FF]=V;
 390                         }
 391                         if (INC32) RefreshAddr+=32;
 392                         else RefreshAddr++;
 393                         if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
 394 }
 395
 396 static DECLFW(B4014)
 397 {
 398         uint32 t=V<<8;
 399         int x;
 400         for(x=0;x<256;x++)
 401          B2004(0x2004,X.DB=ARead[t+x](t+x));
 402         X6502_AddCycles(512);
 403 }
 404
 405 void BGRender(uint8 *target)
 406 {
 407         uint32 tem;
 408         RefreshLine(target);
 409         if(!(PPU[1]&2))
 410         {
 411          tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
 412          tem|=0x40404040;
 413          *(uint32 *)target=*(uint32 *)(target+4)=tem;
 414         }
 415 }
 416
 417 #ifdef FRAMESKIP
 418 extern int framesRendered;
 419 int FSkip=0;
 420 void FCEUI_FrameSkip(int x)
 421 {
 422  FSkip=x;
 423 }
 424 #endif
 425
 426 /*      This is called at the beginning of each visible scanline */
 427 static void Loop6502(void)
 428 {
 429         uint32 tem;
 430         int x;
 431         uint8 *target=XBuf+(scanline<<8)+(scanline<<4)+8;
 432
 433         if(ScreenON || SpriteON)
 434         {
 435          /* PRefreshLine() will not get called on skipped frames.  This
 436             could cause a problem, but the solution would be rather complex,
 437             due to the current sprite 0 hit code.
 438          */
 439          #ifdef FRAMESKIP
 440          if(!FSkip)
 441          {
 442          #endif
 443           if(ScreenON)
 444           {
 445            if(scanline>=FSettings.FirstSLine && scanline<=FSettings.LastSLine)
 446             BGRender(target);
 447            else
 448            {
 449             if(PPU_hook)
 450              PRefreshLine();
 451            }
 452           }
 453           else
 454           {
 455            tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
 456            tem|=0x40404040;
 457            FCEU_dwmemset(target,tem,264);
 458           }
 459          #ifdef FRAMESKIP
 460          }
 461          #endif
 462          if (SpriteON && scanline)
 463           RefreshSprite(target);
 464          #ifdef FRAMESKIP
 465          if(!FSkip)
 466          {
 467          #endif
 468           if(PPU[1]&0x01)
 469           {
 470            for(x=63;x>=0;x--)
 471             *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])&0xF0F0F0F0;
 472           }
 473            if((PPU[1]>>5)==0x7)
 474             for(x=63;x>=0;x--)
 475              *(uint32 *)&target[x<<2]=((*(uint32*)&target[x<<2])&0x3f3f3f3f)|0x40404040;
 476            else if(PPU[1]&0xE0)
 477             for(x=63;x>=0;x--)
 478              *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])|0xC0C0C0C0;
 479            else
 480             for(x=63;x>=0;x--)
 481              *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])&0x3f3f3f3f;
 482
 483          #ifdef FRAMESKIP
 484          }
 485          #endif
 486         }
 487         else
 488         {
 489          tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
 490          FCEU_dwmemset(target,tem,256);
 491         }
 492         if(InputScanlineHook)
 493          InputScanlineHook(target, scanline);
 494 }
 495
 496 #define PAL(c)  ((c)+cc)
 497
 498
 499 static void PRefreshLine(void)
 500 {
 501         uint32 vofs;
 502         uint8 X1;
 503
 504         vofs = 0;
 505         if (BGAdrHI) vofs = 0x1000;
 506
 507         vofs+=(RefreshAddr>>12)&7;
 508
 509         for(X1=33;X1;X1--)
 510         {
 511                 register uint8 no;
 512                 register uint8 zz2;
 513                 zz2=(uint8)((RefreshAddr>>10)&3);
 514                 PPU_hook(0x2000|(RefreshAddr&0xFFF));
 515                 no  = vnapage[zz2][(RefreshAddr&0x3ff)];
 516                 PPU_hook((no<<4)+vofs);
 517                 if((RefreshAddr&0x1f)==0x1f)
 518                  RefreshAddr^=0x41F;
 519                 else
 520                  RefreshAddr++;
 521         }
 522 }
 523
 524 /*              Total of 33 tiles(32 + 1 extra) */
 525 static void FASTAPASS(1) RefreshLine(uint8 *target)
 526 {
 527         uint32 vofs;
 528         int X1;
 529         uint8 *P=target;
 530
 531         vofs=0;
 532
 533         Pal[0]|=64;
 534         Pal[4]|=64;
 535         Pal[8]|=64;
 536         Pal[0xC]|=64;
 537
 538         vofs=((PPU[0]&0x10)<<8) | ((RefreshAddr>>12)&7);
 539         P-=XOffset;
 540
 541         /* This high-level graphics MMC5 emulation code was written
 542            for MMC5 carts in "CL" mode.  It's probably not totally
 543            correct for carts in "SL" mode.
 544         */
 545         if(MMC5Hack && geniestage!=1)
 546         {
 547          if(MMC5HackCHRMode==0 && (MMC5HackSPMode&0x80))
 548          {
 549           int8 tochange;
 550
 551           tochange=MMC5HackSPMode&0x1F;
 552
 553           for(X1=33;X1;X1--,P+=8)
 554           {
 555                 uint8 *C;
 556                 uint8 cc,zz,zz2;
 557                 uint32 vadr;
 558
 559                 if((tochange<=0 && MMC5HackSPMode&0x40) ||
 560                    (tochange>0 && !(MMC5HackSPMode&0x40)))
 561                 {
 562                  uint8 xs,ys;
 563
 564                  xs=33-X1;
 565                  ys=((scanline>>3)+MMC5HackSPScroll)&0x1F;
 566                  if(ys>=0x1E) ys-=0x1E;
 567                  vadr=(MMC5HackExNTARAMPtr[xs|(ys<<5)]<<4)+(vofs&7);
 568
 569                  C = MMC5HackVROMPTR+vadr;
 570                  C += ((MMC5HackSPPage & 0x3f & MMC5HackVROMMask) << 12);
 571
 572                  cc=MMC5HackExNTARAMPtr[0x3c0+(xs>>2)+((ys&0x1C)<<1)];
 573                  cc=((cc >> ((xs&2) + ((ys&0x2)<<1))) &3) <<2;
 574                 }
 575                 else
 576                 {
 577                  zz=RefreshAddr&0x1F;
 578                  zz2=(RefreshAddr>>10)&3;
 579                  vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
 580                  C = MMC5BGVRAMADR(vadr);
 581                  cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
 582                  cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
 583                 }
 584                 #include "fceline.h"
 585
 586                 if((RefreshAddr&0x1f)==0x1f)
 587                  RefreshAddr^=0x41F;
 588                 else
 589                  RefreshAddr++;
 590                 tochange--;
 591           }
 592          }
 593          else if(MMC5HackCHRMode==1 && (MMC5HackSPMode&0x80))
 594          {
 595           int8 tochange;
 596
 597           tochange=MMC5HackSPMode&0x1F;
 598
 599           for(X1=33;X1;X1--,P+=8)
 600           {
 601                 uint8 *C;
 602                 uint8 cc;
 603                 uint8 zz2;
 604                 uint32 vadr;
 605
 606                 if((tochange<=0 && MMC5HackSPMode&0x40) ||
 607                    (tochange>0 && !(MMC5HackSPMode&0x40)))
 608                 {
 609                  uint8 xs,ys;
 610
 611                  xs=33-X1;
 612                  ys=((scanline>>3)+MMC5HackSPScroll)&0x1F;
 613                  if(ys>=0x1E) ys-=0x1E;
 614                  vadr=(MMC5HackExNTARAMPtr[xs|(ys<<5)]<<4)+(vofs&7);
 615
 616                  C = MMC5HackVROMPTR+vadr;
 617                  C += ((MMC5HackSPPage & 0x3f & MMC5HackVROMMask) << 12);
 618
 619                  cc=MMC5HackExNTARAMPtr[0x3c0+(xs>>2)+((ys&0x1C)<<1)];
 620                  cc=((cc >> ((xs&2) + ((ys&0x2)<<1))) &3) <<2;
 621                 }
 622                 else
 623                 {
 624                  C=MMC5HackVROMPTR;
 625                  zz2=(RefreshAddr>>10)&3;
 626                  vadr = (vnapage[zz2][RefreshAddr & 0x3ff] << 4) + vofs;
 627                  C += (((MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff]) & 0x3f &
 628                          MMC5HackVROMMask) << 12) + (vadr & 0xfff);
 629                  vadr = (MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff] & 0xC0)>> 4;
 630                  cc = vadr;
 631                 }
 632                 #include "fceline.h"
 633                 if((RefreshAddr&0x1f)==0x1f)
 634                  RefreshAddr^=0x41F;
 635                 else
 636                  RefreshAddr++;
 637                 tochange--;
 638           }
 639          }
 640
 641          else if(MMC5HackCHRMode==1)
 642          {
 643           for(X1=33;X1;X1--,P+=8)
 644           {
 645                 uint8 *C;
 646                 uint8 cc;
 647                 uint8 zz2;
 648                 uint32 vadr;
 649
 650                 C=MMC5HackVROMPTR;
 651                 zz2=(RefreshAddr>>10)&3;
 652                 vadr = (vnapage[zz2][RefreshAddr & 0x3ff] << 4) + vofs;
 653                 C += (((MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff]) & 0x3f &
 654                         MMC5HackVROMMask) << 12) + (vadr & 0xfff);
 655                 vadr = (MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff] & 0xC0)>> 4;
 656                 cc = vadr;
 657
 658                 #include "fceline.h"
 659                 if((RefreshAddr&0x1f)==0x1f)
 660                  RefreshAddr^=0x41F;
 661                 else
 662                  RefreshAddr++;
 663           }
 664          }
 665          else
 666          {
 667           for(X1=33;X1;X1--,P+=8)
 668           {
 669                 uint8 *C;
 670                 uint8 cc,zz,zz2;
 671                 uint32 vadr;
 672
 673                 zz=RefreshAddr&0x1F;
 674                 zz2=(RefreshAddr>>10)&3;
 675                 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
 676                 C = MMC5BGVRAMADR(vadr);
 677                 cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
 678                 cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
 679
 680                 #include "fceline.h"
 681
 682                 if((RefreshAddr&0x1f)==0x1f)
 683                  RefreshAddr^=0x41F;
 684                 else
 685                  RefreshAddr++;
 686           }
 687          }
 688         }       // End if(MMC5Hack)
 689
 690         else if(PPU_hook)
 691         {
 692          for(X1=33;X1;X1--,P+=8)
 693          {
 694                 uint8 *C;
 695                 uint8 cc,zz,zz2;
 696                 uint32 vadr;
 697
 698                 zz=RefreshAddr&0x1F;
 699                 zz2=(RefreshAddr>>10)&3;
 700                 PPU_hook(0x2000|(RefreshAddr&0xFFF));
 701                 cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
 702                 cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
 703                 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
 704                 C = VRAMADR(vadr);
 705
 706                 #include "fceline.h"
 707
 708                 PPU_hook(vadr);
 709
 710                 if((RefreshAddr&0x1f)==0x1f)
 711                  RefreshAddr^=0x41F;
 712                 else
 713                  RefreshAddr++;
 714          }
 715         }
 716         else
 717         {
 718          for(X1=33;X1;X1--,P+=8)
 719          {
 720                 uint8 *C;
 721                 uint8 cc,zz,zz2;
 722                 uint32 vadr;
 723
 724                 zz=RefreshAddr&0x1F;
 725                 zz2=(RefreshAddr>>10)&3;
 726                 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
 727                 C = VRAMADR(vadr);
 728                 cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
 729                 cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
 730                 #include "fceline.h"
 731
 732                 if((RefreshAddr&0x1f)==0x1f)
 733                  RefreshAddr^=0x41F;
 734                 else
 735                  RefreshAddr++;
 736          }
 737         }
 738
 739         #undef vofs
 740
 741         Pal[0]&=63;
 742         Pal[4]&=63;
 743         Pal[8]&=63;
 744         Pal[0xC]&=63;
 745 }
 746
 747 static INLINE void Fixit2(void)
 748 {
 749    if(ScreenON || SpriteON)
 750    {
 751     uint32 rad=RefreshAddr;
 752     rad&=0xFBE0;
 753     rad|=TempAddr&0x041f;
 754     RefreshAddr=rad;
 755     //PPU_hook(RefreshAddr,-1);
 756    }
 757 }
 758
 759 static INLINE void Fixit1(void)
 760 {
 761    if(ScreenON || SpriteON)
 762    {
 763     uint32 rad=RefreshAddr;
 764
 765     if((rad&0x7000)==0x7000)
 766     {
 767      rad^=0x7000;
 768      if((rad&0x3E0)==0x3A0)
 769      {
 770       rad^=0x3A0;
 771       rad^=0x800;
 772      }
 773      else
 774      {
 775       if((rad&0x3E0)==0x3e0)
 776        rad^=0x3e0;
 777       else rad+=0x20;
 778      }
 779     }
 780     else
 781      rad+=0x1000;
 782     RefreshAddr=rad;
 783     //PPU_hook(RefreshAddr,-1);
 784    }
 785 }
 786
 787 /*      This is called at the beginning of all h-blanks on visible lines. */
 788 static void DoHBlank(void)
 789 {
 790  if(ScreenON || SpriteON)
 791   FetchSpriteData();
 792  if(GameHBIRQHook && (ScreenON || SpriteON))
 793  {
 794   X6502_Run(12);
 795   GameHBIRQHook();
 796   X6502_Run(25-12);
 797   Fixit2();
 798   X6502_Run(85-25);
 799  }
 800  else
 801  {
 802   X6502_Run(25);        // Tried 65, caused problems with Slalom(maybe others)
 803   Fixit2();
 804   X6502_Run(85-25);
 805  }
 806  //PPU_hook(0,-1);
 807  //fprintf(stderr,"%3d: $%04x\n",scanline,RefreshAddr);
 808 }
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826 // ============================//
 827 // end of new code
 828 // ===========================//
 829
 830 void ResetMapping(void)
 831 {
 832         int x;
 833
 834         SetReadHandler(0x0000,0xFFFF,ANull);
 835         SetWriteHandler(0x0000,0xFFFF,BNull);
 836
 837         SetReadHandler(0,0x7FF,ARAML);
 838         SetWriteHandler(0,0x7FF,BRAML);
 839
 840         SetReadHandler(0x800,0x1FFF,ARAMH);  /* Part of a little */
 841         SetWriteHandler(0x800,0x1FFF,BRAMH); /* hack for a small speed boost. */
 842
 843         for(x=0x2000;x<0x4000;x+=8)
 844         {
 845          ARead[x]=A200x;
 846          BWrite[x]=B2000;
 847          ARead[x+1]=A200x;
 848          BWrite[x+1]=B2001;
 849          ARead[x+2]=A2002;
 850          BWrite[x+2]=B2002;
 851          ARead[x+3]=A200x;
 852          BWrite[x+3]=B2003;
 853          ARead[x+4]=A200x;
 854          BWrite[x+4]=B2004;
 855          ARead[x+5]=A200x;
 856          BWrite[x+5]=B2005;
 857          ARead[x+6]=A200x;
 858          BWrite[x+6]=B2006;
 859          ARead[x+7]=A2007;
 860          BWrite[x+7]=B2007;
 861         }
 862
 863         BWrite[0x4014]=B4014;
 864         SetNESSoundMap();
 865         InitializeInput();
 866 }
 867
 868 int GameLoaded=0;
 869 void CloseGame(void)
 870 {
 871  if(GameLoaded)
 872  {
 873   if(FCEUGameInfo.type!=GIT_NSF)
 874    FlushGameCheats();
 875   #ifdef NETWORK
 876   if(FSettings.NetworkPlay) KillNetplay();
 877   #endif
 878   GameInterface(GI_CLOSE);
 879   CloseGenie();
 880   GameLoaded=0;
 881  }
 882 }
 883
 884 void ResetGameLoaded(void)
 885 {
 886         if(GameLoaded) CloseGame();
 887         GameStateRestore=0;
 888         PPU_hook=0;
 889         GameHBIRQHook=0;
 890         GameExpSound.Fill=0;
 891         GameExpSound.RChange=0;
 892         if(GameExpSound.Kill)
 893          GameExpSound.Kill();
 894         GameExpSound.Kill=0;
 895         MapIRQHook=0;
 896         MMC5Hack=0;
 897         PAL&=1;
 898         pale=0;
 899
 900         FCEUGameInfo.name=0;
 901         FCEUGameInfo.type=GIT_CART;
 902         FCEUGameInfo.vidsys=GIV_USER;
 903         FCEUGameInfo.input[0]=FCEUGameInfo.input[1]=-1;
 904         FCEUGameInfo.inputfc=-1;
 905 }
 906
 907 FCEUGI *FCEUI_LoadGame(char *name)
 908 {
 909         int fp;
 910
 911         Exit=1;
 912         ResetGameLoaded();
 913
 914         fp=FCEU_fopen(name,"rb");
 915         if(!fp)
 916         {
 917          FCEU_PrintError("Error opening \"%s\"!",name);
 918          return 0;
 919         }
 920
 921         GetFileBase(name);
 922         if(iNESLoad(name,fp))
 923          goto endlseq;
 924         if(NSFLoad(fp))
 925          goto endlseq;
 926         if(FDSLoad(name,fp))
 927          goto endlseq;
 928         if(UNIFLoad(name,fp))
 929          goto endlseq;
 930
 931         FCEU_PrintError("An error occurred while loading the file.");
 932         FCEU_fclose(fp);
 933         return 0;
 934
 935         endlseq:
 936         FCEU_fclose(fp);
 937         GameLoaded=1;
 938
 939         FCEU_ResetVidSys();
 940         if(FCEUGameInfo.type!=GIT_NSF)
 941          if(FSettings.GameGenie)
 942           OpenGenie();
 943
 944         PowerNES();
 945         #ifdef NETWORK
 946         if(FSettings.NetworkPlay) InitNetplay();
 947         #endif
 948         SaveStateRefresh();
 949         if(FCEUGameInfo.type!=GIT_NSF)
 950         {
 951          LoadGamePalette();
 952          LoadGameCheats();
 953         }
 954
 955         FCEU_ResetPalette();
 956         Exit=0;
 957         return(&FCEUGameInfo);
 958 }
 959
 960
 961 void FCEU_ResetVidSys(void)
 962 {
 963  int w;
 964
 965  if(FCEUGameInfo.vidsys==GIV_NTSC)
 966   w=0;
 967  else if(FCEUGameInfo.vidsys==GIV_PAL)
 968   w=1;
 969  else
 970   w=FSettings.PAL;
 971
 972  if(w)
 973  {
 974   PAL=1;
 975   scanlines_per_frame=312;
 976   FSettings.FirstSLine=FSettings.UsrFirstSLine[1];
 977   FSettings.LastSLine=FSettings.UsrLastSLine[1];
 978  }
 979  else
 980  {
 981   PAL=0;
 982   scanlines_per_frame=262;
 983   FSettings.FirstSLine=FSettings.UsrFirstSLine[0];
 984   FSettings.LastSLine=FSettings.UsrLastSLine[0];
 985  }
 986  SetSoundVariables();
 987 }
 988
 989 int FCEUI_Initialize(void)
 990 {
 991         if(!InitVirtualVideo())
 992          return 0;
 993         memset(&FSettings,0,sizeof(FSettings));
 994         FSettings.UsrFirstSLine[0]=8;
 995         FSettings.UsrFirstSLine[1]=0;
 996         FSettings.UsrLastSLine[0]=FSettings.UsrLastSLine[1]=239;
 997         FSettings.SoundVolume=65535;    // 100%
 998         return 1;
 999 }
1000
1001 #define harko 0xe //0x9
1002 static INLINE void Thingo(void)
1003 {
1004    Loop6502();
1005
1006    if(tosprite>=256)
1007    {
1008     X6502_Run(256-harko);
1009     Fixit1();
1010     X6502_Run(harko);
1011    }
1012    else
1013    {
1014     if(tosprite<=240)
1015     {
1016      X6502_Run(tosprite);
1017      PPU[2]|=0x40;
1018      X6502_Run(256-tosprite-harko);
1019      Fixit1();
1020      X6502_Run(harko);
1021     }
1022     else
1023     {
1024      X6502_Run(256-harko);
1025      Fixit1();
1026      X6502_Run(tosprite-(256-harko));
1027      PPU[2]|=0x40;
1028      X6502_Run(256-tosprite);
1029     }
1030     tosprite=256;
1031    }
1032    DoHBlank();
1033 }
1034 #undef harko
1035
1036 void EmLoop(void)
1037 {
1038  for(;;)
1039  {
1040   ApplyPeriodicCheats();
1041   X6502_Run(256+85);
1042
1043   PPU[2]|=0x80;
1044   PPU[3]=PPUSPL=0;             /* Not sure if this is correct.  According
1045                                   to Matt Conte and my own tests, it is.  Timing is probably
1046                                   off, though.  NOTE:  Not having this here
1047                                   breaks a Super Donkey Kong game. */
1048
1049   X6502_Run(12);                /* I need to figure out the true nature and length
1050                                    of this delay.
1051                                 */
1052   if(FCEUGameInfo.type==GIT_NSF)
1053    TriggerNMINSF();
1054   else if(VBlankON)
1055    TriggerNMI();
1056
1057   X6502_Run((scanlines_per_frame-242)*(256+85)-12);
1058
1059   PPU_status&=0x1f;
1060
1061   X6502_Run(256);
1062   {
1063    static int kook=0;
1064    if(ScreenON || SpriteON)
1065     if(GameHBIRQHook)
1066      GameHBIRQHook();
1067
1068    X6502_Run(85-kook);
1069    kook=(kook+1)&1;
1070   }
1071
1072   if(ScreenON || SpriteON)
1073   {
1074    RefreshAddr=TempAddr;
1075    if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
1076   }
1077   if(FCEUGameInfo.type==GIT_NSF)
1078    X6502_Run((256+85)*240);
1079   else
1080   {
1081    int x,max,maxref;
1082
1083    deemp=PPU[1]>>5;
1084    for(scanline=0;scanline<240;scanline++)
1085    {
1086     deempcnt[deemp]++;
1087     Thingo();
1088    }
1089    for(x=1,max=0,maxref=0;x<7;x++)
1090    {
1091     if(deempcnt[x]>max)
1092     {
1093      max=deempcnt[x];
1094      maxref=x;
1095     }
1096     deempcnt[x]=0;
1097    }
1098    //FCEU_DispMessage("%2x:%2x:%2x:%2x:%2x:%2x:%2x:%2x %d",deempcnt[0],deempcnt[1],deempcnt[2],deempcnt[3],deempcnt[4],deempcnt[5],deempcnt[6],deempcnt[7],maxref);
1099    //memset(deempcnt,0,sizeof(deempcnt));
1100    SetNESDeemph(maxref,0);
1101   }
1102
1103   {
1104    int ssize;
1105
1106    ssize=FlushEmulateSound();
1107
1108    #ifdef FRAMESKIP
1109    if(FSkip)
1110    {
1111     FCEU_PutImageDummy();
1112     FSkip--;
1113     framesRendered++;
1114     FCEUD_Update(0,WaveFinalMono,ssize);
1115    }
1116    else
1117    #endif
1118    {
1119     FCEU_PutImage();
1120     FCEUD_Update(XBuf+8,WaveFinalMono,ssize);
1121    }
1122    UpdateInput();
1123   }
1124
1125   if(Exit)
1126   {
1127    CloseGame();
1128    break;
1129   }
1130
1131  }
1132 }
1133
1134 #ifdef FPS
1135 #include <sys/time.h>
1136 uint64 frcount;
1137 #endif
1138 void FCEUI_Emulate(void)
1139 {
1140         #ifdef FPS
1141         uint64 starttime,end;
1142         struct timeval tv;
1143         frcount=0;
1144         gettimeofday(&tv,0);
1145         starttime=((uint64)tv.tv_sec*1000000)+tv.tv_usec;
1146         #endif
1147         EmLoop();
1148
1149         #ifdef FPS
1150         // Probably won't work well on Windows port; for
1151         // debugging/speed testing.
1152         {
1153          uint64 w;
1154          int i,frac;
1155          gettimeofday(&tv,0);
1156          end=((uint64)tv.tv_sec*1000000)+tv.tv_usec;
1157          w=frcount*10000000000LL/(end-starttime);
1158          i=w/10000;
1159          frac=w-i*10000;
1160          printf("Average FPS: %d.%04d\n",i,frac);
1161         }
1162         #endif
1163
1164 }
1165
1166 void FCEUI_CloseGame(void)
1167 {
1168         Exit=1;
1169 }
1170
1171 static void ResetPPU(void)
1172 {
1173         VRAMBuffer=PPU[0]=PPU[1]=PPU[2]=PPU[3]=0;
1174         PPUSPL=0;
1175         PPUGenLatch=0;
1176         RefreshAddr=TempAddr=0;
1177         vtoggle = 0;
1178 }
1179
1180 static void PowerPPU(void)
1181 {
1182         memset(NTARAM,0x00,0x800);
1183         memset(PALRAM,0x00,0x20);
1184         memset(SPRAM,0x00,0x100);
1185         ResetPPU();
1186 }
1187
1188 void ResetNES(void)
1189 {
1190         if(!GameLoaded || (FCEUGameInfo.type==GIT_NSF)) return;
1191         GameInterface(GI_RESETM2);
1192         ResetSound();
1193         ResetPPU();
1194         X6502_Reset();
1195 }
1196
1197 void PowerNES(void)
1198 {
1199         if(!GameLoaded) return;
1200
1201         FCEU_CheatResetRAM();
1202         FCEU_CheatAddRAM(2,0,RAM);
1203
1204         GeniePower();
1205
1206         memset(RAM,0x00,0x800);
1207         ResetMapping();
1208         GameInterface(GI_POWER);
1209         PowerSound();
1210         PowerPPU();
1211         timestampbase=0;
1212         X6502_Power();
1213 }
1214