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 (*RefreshLine)(uint8 *P, uint32 vofs) = NULL;
  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 GameMemBlock[131072] __attribute__ ((aligned (4)));
 209 uint8 NTARAM[0x800] __attribute__ ((aligned (4)));
 210 uint8 PALRAM[0x20] __attribute__ ((aligned (4)));
 211 uint8 RAM[0x800] __attribute__ ((aligned (4)));
 212
 213 uint8 PPU[4];
 214 uint8 PPUSPL;
 215
 216 uint8 PAL=0;
 217
 218
 219 #define MMC5BGVRAMADR(V)      &MMC5BGVPage[(V)>>10][(V)]
 220 #define VRAMADR(V)      &VPage[(V)>>10][(V)]
 221
 222 static DECLFW(BRAML)
 223 {
 224         RAM[A]=V;
 225 }
 226
 227 static DECLFW(BRAMH)
 228 {
 229         RAM[A&0x7FF]=V;
 230 }
 231
 232 static DECLFR(ARAML)
 233 {
 234         return RAM[A];
 235 }
 236
 237 static DECLFR(ARAMH)
 238 {
 239         return RAM[A&0x7FF];
 240 }
 241
 242
 243 static DECLFR(A2002)
 244 {
 245                         uint8 ret;
 246                         ret = PPU_status;
 247                         vtoggle=0;
 248                         PPU_status&=0x7F;
 249                         return ret|(PPUGenLatch&0x1F);
 250 }
 251
 252 static DECLFR(A200x)
 253 {
 254                         return PPUGenLatch;
 255 }
 256
 257 static DECLFR(A2007)
 258 {
 259                         uint8 ret;
 260                         uint32 tmp=RefreshAddr&0x3FFF;
 261
 262                         PPUGenLatch=ret=VRAMBuffer;
 263                         if(PPU_hook) PPU_hook(tmp);
 264                         if(tmp<0x2000)
 265                         {
 266                          VRAMBuffer=VPage[tmp>>10][tmp];
 267                         }
 268                         else
 269                         {
 270                          VRAMBuffer=vnapage[(tmp>>10)&0x3][tmp&0x3FF];
 271                         }
 272
 273                         if (INC32) RefreshAddr+=32;
 274                         else RefreshAddr++;
 275                         if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
 276                         return ret;
 277 }
 278
 279 static DECLFW(B2000)
 280 {
 281                 PPUGenLatch=V;
 282                 PPU[0]=V;
 283                 TempAddr&=0xF3FF;
 284                 TempAddr|=(V&3)<<10;
 285 }
 286
 287 static DECLFW(B2001)
 288 {
 289                   PPUGenLatch=V;
 290                   PPU[1]=V;
 291                   if(V&0xE0)
 292                    deemp=V>>5;
 293                   //printf("$%04x:$%02x, %d\n",X.PC,V,scanline);
 294 }
 295
 296 static DECLFW(B2002)
 297 {
 298                  PPUGenLatch=V;
 299 }
 300
 301 static DECLFW(B2003)
 302 {
 303                 PPUGenLatch=V;
 304                 PPU[3]=V;
 305                 PPUSPL=V&0x7;
 306 }
 307
 308 static DECLFW(B2004)
 309 {
 310                 PPUGenLatch=V;
 311                 //SPRAM[PPU[3]++]=V;
 312                 if(PPUSPL&8)
 313                 {
 314                  if(PPU[3]>=8)
 315                   SPRAM[PPU[3]]=V;
 316                 }
 317                 else
 318                 {
 319                  //printf("$%02x:$%02x\n",PPUSPL,V);
 320                  SPRAM[PPUSPL]=V;
 321                  PPUSPL++;
 322                 }
 323                 PPU[3]++;
 324
 325 }
 326
 327 static DECLFW(B2005)
 328 {
 329                 uint32 tmp=TempAddr;
 330
 331                 PPUGenLatch=V;
 332                 if (!vtoggle)
 333                 {
 334                  tmp&=0xFFE0;
 335                  tmp|=V>>3;
 336                  XOffset=V&7;
 337                 }
 338                 else
 339                 {
 340                  tmp&=0x8C1F;
 341                  tmp|=((V&~0x7)<<2);
 342                  tmp|=(V&7)<<12;
 343                 }
 344
 345                 TempAddr=tmp;
 346                 vtoggle^=1;
 347 }
 348
 349 static DECLFW(B2006)
 350 {
 351                        PPUGenLatch=V;
 352                        if(!vtoggle)
 353                        {
 354                         TempAddr&=0x00FF;
 355                         TempAddr|=(V&0x3f)<<8;
 356                        }
 357                        else
 358                        {
 359                         TempAddr&=0xFF00;
 360                         TempAddr|=V;
 361                         RefreshAddr=TempAddr;
 362
 363                         if(PPU_hook)
 364                          PPU_hook(RefreshAddr);
 365                        }
 366                       vtoggle^=1;
 367 }
 368
 369 static DECLFW(B2007)
 370 {
 371                         uint32 tmp=RefreshAddr&0x3FFF;
 372
 373                         PPUGenLatch=V;
 374                         if(tmp>=0x3F00)
 375                         {
 376                         // hmmm....
 377                         if(!(tmp&0xf))
 378                          PALRAM[0x00]=PALRAM[0x04]=PALRAM[0x08]=PALRAM[0x0C]=
 379                          PALRAM[0x10]=PALRAM[0x14]=PALRAM[0x18]=PALRAM[0x1c]=V&0x3f;
 380                         else if(tmp&3) PALRAM[(tmp&0x1f)]=V&0x3f;
 381                         }
 382                         else if(tmp<0x2000)
 383                         {
 384                           if(PPUCHRRAM&(1<<(tmp>>10)))
 385                             VPage[tmp>>10][tmp]=V;
 386                         }
 387                         else
 388                         {
 389                          if(PPUNTARAM&(1<<((tmp&0xF00)>>10)))
 390                           vnapage[((tmp&0xF00)>>10)][tmp&0x3FF]=V;
 391                         }
 392                         if (INC32) RefreshAddr+=32;
 393                         else RefreshAddr++;
 394                         if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
 395 }
 396
 397 static DECLFW(B4014)
 398 {
 399         uint32 t=V<<8;
 400         int x;
 401         for(x=0;x<256;x++)
 402          B2004(0x2004,X.DB=ARead[t+x](t+x));
 403         X6502_AddCycles(512);
 404 }
 405
 406 void BGRender(uint8 *target)
 407 {
 408         uint32 tem, vofs;
 409         vofs=((PPU[0]&0x10)<<8) | ((RefreshAddr>>12)&7);
 410
 411         Pal[0]|=64;
 412         Pal[4]|=64;
 413         Pal[8]|=64;
 414         Pal[0xC]|=64;
 415         RefreshLine(target-XOffset, vofs);
 416         Pal[0]&=63;
 417         Pal[4]&=63;
 418         Pal[8]&=63;
 419         Pal[0xC]&=63;
 420
 421         if(!(PPU[1]&2))
 422         {
 423          tem=Pal[0]|0x40;
 424          tem|=tem<<8;
 425          tem|=tem<<16;
 426          *(uint32 *)target=*(uint32 *)(target+4)=tem;
 427         }
 428 }
 429
 430 #ifdef FRAMESKIP
 431 int FSkip_setting=-1; // auto
 432 int FSkip=0;
 433 void FCEUI_FrameSkip(int x)
 434 {
 435  FSkip=x;
 436 }
 437 #endif
 438
 439 /*      This is called at the beginning of each visible scanline */
 440 static void Loop6502(void)
 441 {
 442         uint32 tem;
 443         int x;
 444         uint8 *target=XBuf+(scanline<<8)+(scanline<<4)+8;
 445
 446         if(ScreenON || SpriteON)
 447         {
 448          /* PRefreshLine() will not get called on skipped frames.  This
 449             could cause a problem, but the solution would be rather complex,
 450             due to the current sprite 0 hit code.
 451          */
 452          #ifdef FRAMESKIP
 453          if(!FSkip)
 454          {
 455          #endif
 456           if(ScreenON)
 457           {
 458            if(scanline>=FSettings.FirstSLine && scanline<=FSettings.LastSLine)
 459             BGRender(target);
 460            else
 461            {
 462             if(PPU_hook)
 463              PRefreshLine();
 464            }
 465           }
 466           else
 467           {
 468            tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
 469            tem|=0x40404040;
 470            FCEU_dwmemset(target,tem,264);
 471           }
 472          #ifdef FRAMESKIP
 473          }
 474          #endif
 475          if (SpriteON && scanline)
 476           RefreshSprite(target);
 477          #ifdef FRAMESKIP
 478          if(!FSkip)
 479          {
 480          #endif
 481           if(PPU[1]&0x01)
 482           {
 483            for(x=63;x>=0;x--)
 484             *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])&0xF0F0F0F0;
 485           }
 486            if((PPU[1]>>5)==0x7)
 487             for(x=63;x>=0;x--)
 488              *(uint32 *)&target[x<<2]=((*(uint32*)&target[x<<2])&0x3f3f3f3f)|0x40404040;
 489            else if(PPU[1]&0xE0)
 490             for(x=63;x>=0;x--)
 491              *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])|0xC0C0C0C0;
 492            else
 493             for(x=63;x>=0;x--)
 494              *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])&0x3f3f3f3f;
 495
 496          #ifdef FRAMESKIP
 497          }
 498          #endif
 499         }
 500         else
 501         {
 502          tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
 503          FCEU_dwmemset(target,tem,256);
 504         }
 505         if(InputScanlineHook)
 506          InputScanlineHook(target, scanline);
 507 }
 508
 509 #define PAL(c)  ((c)+cc)
 510
 511
 512 static void PRefreshLine(void)
 513 {
 514         uint32 vofs;
 515         uint8 X1;
 516
 517         vofs = 0;
 518         if (BGAdrHI) vofs = 0x1000;
 519
 520         vofs+=(RefreshAddr>>12)&7;
 521
 522         for(X1=33;X1;X1--)
 523         {
 524                 register uint8 no;
 525                 register uint8 zz2;
 526                 zz2=(uint8)((RefreshAddr>>10)&3);
 527                 PPU_hook(0x2000|(RefreshAddr&0xFFF));
 528                 no  = vnapage[zz2][(RefreshAddr&0x3ff)];
 529                 PPU_hook((no<<4)+vofs);
 530                 if((RefreshAddr&0x1f)==0x1f)
 531                  RefreshAddr^=0x41F;
 532                 else
 533                  RefreshAddr++;
 534         }
 535 }
 536
 537 /* This high-level graphics MMC5 emulation code was written
 538    for MMC5 carts in "CL" mode.  It's probably not totally
 539    correct for carts in "SL" mode.
 540    */
 541 static void RefreshLine_MMC5Hack1(uint8 *P, uint32 vofs)
 542 {
 543           int8 tochange, X1;
 544
 545           tochange=MMC5HackSPMode&0x1F;
 546
 547           for(X1=33;X1;X1--,P+=8)
 548           {
 549                 uint8 *C;
 550                 uint8 cc,zz,zz2;
 551                 uint32 vadr;
 552
 553                 if((tochange<=0 && MMC5HackSPMode&0x40) ||
 554                    (tochange>0 && !(MMC5HackSPMode&0x40)))
 555                 {
 556                  uint8 xs,ys;
 557
 558                  xs=33-X1;
 559                  ys=((scanline>>3)+MMC5HackSPScroll)&0x1F;
 560                  if(ys>=0x1E) ys-=0x1E;
 561                  vadr=(MMC5HackExNTARAMPtr[xs|(ys<<5)]<<4)+(vofs&7);
 562
 563                  C = MMC5HackVROMPTR+vadr;
 564                  C += ((MMC5HackSPPage & 0x3f & MMC5HackVROMMask) << 12);
 565
 566                  cc=MMC5HackExNTARAMPtr[0x3c0+(xs>>2)+((ys&0x1C)<<1)];
 567                  cc=((cc >> ((xs&2) + ((ys&0x2)<<1))) &3) <<2;
 568                 }
 569                 else
 570                 {
 571                  zz=RefreshAddr&0x1F;
 572                  zz2=(RefreshAddr>>10)&3;
 573                  vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
 574                  C = MMC5BGVRAMADR(vadr);
 575                  cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
 576                  cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
 577                 }
 578                 #include "fceline.h"
 579
 580                 if((RefreshAddr&0x1f)==0x1f)
 581                  RefreshAddr^=0x41F;
 582                 else
 583                  RefreshAddr++;
 584                 tochange--;
 585           }
 586 }
 587
 588 static void RefreshLine_MMC5Hack2(uint8 *P, uint32 vofs)
 589 {
 590           int8 tochange, X1;
 591
 592           tochange=MMC5HackSPMode&0x1F;
 593
 594           for(X1=33;X1;X1--,P+=8)
 595           {
 596                 uint8 *C;
 597                 uint8 cc;
 598                 uint8 zz2;
 599                 uint32 vadr;
 600
 601                 if((tochange<=0 && MMC5HackSPMode&0x40) ||
 602                    (tochange>0 && !(MMC5HackSPMode&0x40)))
 603                 {
 604                  uint8 xs,ys;
 605
 606                  xs=33-X1;
 607                  ys=((scanline>>3)+MMC5HackSPScroll)&0x1F;
 608                  if(ys>=0x1E) ys-=0x1E;
 609                  vadr=(MMC5HackExNTARAMPtr[xs|(ys<<5)]<<4)+(vofs&7);
 610
 611                  C = MMC5HackVROMPTR+vadr;
 612                  C += ((MMC5HackSPPage & 0x3f & MMC5HackVROMMask) << 12);
 613
 614                  cc=MMC5HackExNTARAMPtr[0x3c0+(xs>>2)+((ys&0x1C)<<1)];
 615                  cc=((cc >> ((xs&2) + ((ys&0x2)<<1))) &3) <<2;
 616                 }
 617                 else
 618                 {
 619                  C=MMC5HackVROMPTR;
 620                  zz2=(RefreshAddr>>10)&3;
 621                  vadr = (vnapage[zz2][RefreshAddr & 0x3ff] << 4) + vofs;
 622                  C += (((MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff]) & 0x3f &
 623                          MMC5HackVROMMask) << 12) + (vadr & 0xfff);
 624                  vadr = (MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff] & 0xC0)>> 4;
 625                  cc = vadr;
 626                 }
 627                 #include "fceline.h"
 628                 if((RefreshAddr&0x1f)==0x1f)
 629                  RefreshAddr^=0x41F;
 630                 else
 631                  RefreshAddr++;
 632                 tochange--;
 633           }
 634 }
 635
 636 static void RefreshLine_MMC5Hack3(uint8 *P, uint32 vofs)
 637 {
 638           int8 X1;
 639
 640           for(X1=33;X1;X1--,P+=8)
 641           {
 642                 uint8 *C;
 643                 uint8 cc;
 644                 uint8 zz2;
 645                 uint32 vadr;
 646
 647                 C=MMC5HackVROMPTR;
 648                 zz2=(RefreshAddr>>10)&3;
 649                 vadr = (vnapage[zz2][RefreshAddr & 0x3ff] << 4) + vofs;
 650                 C += (((MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff]) & 0x3f &
 651                         MMC5HackVROMMask) << 12) + (vadr & 0xfff);
 652                 vadr = (MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff] & 0xC0)>> 4;
 653                 cc = vadr;
 654
 655                 #include "fceline.h"
 656                 if((RefreshAddr&0x1f)==0x1f)
 657                  RefreshAddr^=0x41F;
 658                 else
 659                  RefreshAddr++;
 660           }
 661 }
 662
 663 static void RefreshLine_MMC5Hack4(uint8 *P, uint32 vofs)
 664 {
 665           int8 X1;
 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
 689 static void RefreshLine_PPU_hook(uint8 *P, uint32 vofs)
 690 {
 691          int8 X1;
 692
 693          for(X1=33;X1;X1--,P+=8)
 694          {
 695                 uint8 *C;
 696                 uint8 cc,zz,zz2;
 697                 uint32 vadr;
 698
 699                 zz=RefreshAddr&0x1F;
 700                 zz2=(RefreshAddr>>10)&3;
 701                 PPU_hook(0x2000|(RefreshAddr&0xFFF));
 702                 cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
 703                 cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
 704                 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
 705                 C = VRAMADR(vadr);
 706
 707                 #include "fceline.h"
 708
 709                 PPU_hook(vadr);
 710
 711                 if((RefreshAddr&0x1f)==0x1f)
 712                  RefreshAddr^=0x41F;
 713                 else
 714                  RefreshAddr++;
 715          }
 716 }
 717
 718 static void RefreshLine_normal(uint8 *P, uint32 vofs) // vofs is 0x107 max
 719 {
 720          int8 X1;
 721          uint32 rfraddr = RefreshAddr;
 722          uint8 *page = vnapage[(rfraddr>>10)&3];
 723          uint32 cc2=0;
 724
 725          if ((rfraddr&0xc)!=0)
 726           cc2=*(uint32 *) (page + ((rfraddr&0x380)>>4) + ((rfraddr&0x10)>>2) + 0x3c0);
 727
 728          for (X1=33;X1;X1--,P+=8)
 729          {
 730                 uint8 cc,*C;
 731                 uint32 vadr;
 732
 733                 vadr=(page[rfraddr&0x3ff]<<4)+vofs;
 734                 C = VRAMADR(vadr);
 735                 if ((rfraddr&0xc)==0)
 736                  cc2=*(uint32 *) (page + ((rfraddr&0x380)>>4) + ((rfraddr&0x10)>>2) + 0x3c0);
 737                 cc=((cc2 >> ((rfraddr&2) + ((rfraddr&0x40)>>4) + ((rfraddr&0xc)<<1))) & 3) << 2;
 738
 739                 #include "fceline.h"
 740
 741                 if((rfraddr&0x1f)==0x1f) {
 742                  rfraddr^=0x41F;
 743                  page = vnapage[(rfraddr>>10)&3];
 744                 } else
 745                  rfraddr++;
 746          }
 747          RefreshAddr = rfraddr;
 748 }
 749
 750 static void SetRefreshLine(void)
 751 {
 752         if(MMC5Hack && geniestage!=1)
 753         {
 754          if(MMC5HackCHRMode==0 && (MMC5HackSPMode&0x80))
 755          {
 756                  if (RefreshLine != RefreshLine_MMC5Hack1) printf("set refr RefreshLine_MMC5Hack1\n");
 757                  RefreshLine = RefreshLine_MMC5Hack1;
 758          }
 759          else if(MMC5HackCHRMode==1 && (MMC5HackSPMode&0x80))
 760          {
 761                 if (RefreshLine != RefreshLine_MMC5Hack2) printf("set refr RefreshLine_MMC5Hack2\n");
 762                  RefreshLine = RefreshLine_MMC5Hack2;
 763          }
 764          else if(MMC5HackCHRMode==1)
 765          {
 766                 if (RefreshLine != RefreshLine_MMC5Hack3) printf("set refr RefreshLine_MMC5Hack3\n");
 767                  RefreshLine = RefreshLine_MMC5Hack3;
 768          }
 769          else
 770          {
 771                 if (RefreshLine != RefreshLine_MMC5Hack4) printf("set refr RefreshLine_MMC5Hack4\n");
 772                  RefreshLine = RefreshLine_MMC5Hack4;
 773          }
 774         }       // End if(MMC5Hack)
 775         else if(PPU_hook)
 776         {
 777                 if (RefreshLine != RefreshLine_PPU_hook) printf("set refr RefreshLine_PPU_hook\n");
 778                 RefreshLine = RefreshLine_PPU_hook;
 779         }
 780         else
 781         {
 782                 if (RefreshLine != RefreshLine_normal) printf("set refr RefreshLine_normal\n");
 783                 RefreshLine = RefreshLine_normal;
 784         }
 785 }
 786
 787 static INLINE void Fixit2(void)
 788 {
 789    if(ScreenON || SpriteON)
 790    {
 791     uint32 rad=RefreshAddr;
 792     rad&=0xFBE0;
 793     rad|=TempAddr&0x041f;
 794     RefreshAddr=rad;
 795     //PPU_hook(RefreshAddr,-1);
 796    }
 797 }
 798
 799 static INLINE void Fixit1(void)
 800 {
 801    if(ScreenON || SpriteON)
 802    {
 803     uint32 rad=RefreshAddr;
 804
 805     if((rad&0x7000)==0x7000)
 806     {
 807      rad^=0x7000;
 808      if((rad&0x3E0)==0x3A0)
 809      {
 810       rad^=0x3A0;
 811       rad^=0x800;
 812      }
 813      else
 814      {
 815       if((rad&0x3E0)==0x3e0)
 816        rad^=0x3e0;
 817       else rad+=0x20;
 818      }
 819     }
 820     else
 821      rad+=0x1000;
 822     RefreshAddr=rad;
 823     //PPU_hook(RefreshAddr,-1);
 824    }
 825 }
 826
 827 /*      This is called at the beginning of all h-blanks on visible lines. */
 828 static void DoHBlank(void)
 829 {
 830  if(ScreenON || SpriteON)
 831   FetchSpriteData();
 832  if(GameHBIRQHook && (ScreenON || SpriteON))
 833  {
 834   X6502_Run(12);
 835   GameHBIRQHook();
 836   X6502_Run(25-12);
 837   Fixit2();
 838   X6502_Run(85-25);
 839  }
 840  else
 841  {
 842   X6502_Run(25);        // Tried 65, caused problems with Slalom(maybe others)
 843   Fixit2();
 844   X6502_Run(85-25);
 845  }
 846  //PPU_hook(0,-1);
 847  //fprintf(stderr,"%3d: $%04x\n",scanline,RefreshAddr);
 848 }
 849
 850
 851
 852 // ============================//
 853 // end of new code
 854 // ===========================//
 855
 856 void ResetMapping(void)
 857 {
 858         int x;
 859
 860         SetReadHandler(0x0000,0xFFFF,ANull);
 861         SetWriteHandler(0x0000,0xFFFF,BNull);
 862
 863         SetReadHandler(0,0x7FF,ARAML);
 864         SetWriteHandler(0,0x7FF,BRAML);
 865
 866         SetReadHandler(0x800,0x1FFF,ARAMH);  /* Part of a little */
 867         SetWriteHandler(0x800,0x1FFF,BRAMH); /* hack for a small speed boost. */
 868
 869         for(x=0x2000;x<0x4000;x+=8)
 870         {
 871          ARead[x]=A200x;
 872          BWrite[x]=B2000;
 873          ARead[x+1]=A200x;
 874          BWrite[x+1]=B2001;
 875          ARead[x+2]=A2002;
 876          BWrite[x+2]=B2002;
 877          ARead[x+3]=A200x;
 878          BWrite[x+3]=B2003;
 879          ARead[x+4]=A200x;
 880          BWrite[x+4]=B2004;
 881          ARead[x+5]=A200x;
 882          BWrite[x+5]=B2005;
 883          ARead[x+6]=A200x;
 884          BWrite[x+6]=B2006;
 885          ARead[x+7]=A2007;
 886          BWrite[x+7]=B2007;
 887         }
 888
 889         BWrite[0x4014]=B4014;
 890         SetNESSoundMap();
 891         InitializeInput();
 892 }
 893
 894 int GameLoaded=0;
 895 void CloseGame(void)
 896 {
 897  if(GameLoaded)
 898  {
 899   if(FCEUGameInfo.type!=GIT_NSF)
 900    FlushGameCheats();
 901   #ifdef NETWORK
 902   if(FSettings.NetworkPlay) KillNetplay();
 903   #endif
 904   GameInterface(GI_CLOSE);
 905   CloseGenie();
 906   GameLoaded=0;
 907  }
 908 }
 909
 910 void ResetGameLoaded(void)
 911 {
 912         if(GameLoaded) CloseGame();
 913         GameStateRestore=0;
 914         PPU_hook=0;
 915         GameHBIRQHook=0;
 916         GameExpSound.Fill=0;
 917         GameExpSound.RChange=0;
 918         if(GameExpSound.Kill)
 919          GameExpSound.Kill();
 920         GameExpSound.Kill=0;
 921         MapIRQHook=0;
 922         MMC5Hack=0;
 923         PAL&=1;
 924         pale=0;
 925
 926         FCEUGameInfo.name=0;
 927         FCEUGameInfo.type=GIT_CART;
 928         FCEUGameInfo.vidsys=GIV_USER;
 929         FCEUGameInfo.input[0]=FCEUGameInfo.input[1]=-1;
 930         FCEUGameInfo.inputfc=-1;
 931 }
 932
 933 FCEUGI *FCEUI_LoadGame(char *name)
 934 {
 935         int fp;
 936
 937         Exit=1;
 938         ResetGameLoaded();
 939
 940         fp=FCEU_fopen(name,"rb");
 941         if(!fp)
 942         {
 943          FCEU_PrintError("Error opening \"%s\"!",name);
 944          return 0;
 945         }
 946
 947         GetFileBase(name);
 948         if(iNESLoad(name,fp))
 949          goto endlseq;
 950         if(NSFLoad(fp))
 951          goto endlseq;
 952         if(FDSLoad(name,fp))
 953          goto endlseq;
 954         if(UNIFLoad(name,fp))
 955          goto endlseq;
 956
 957         FCEU_PrintError("An error occurred while loading the file.");
 958         FCEU_fclose(fp);
 959         return 0;
 960
 961         endlseq:
 962         FCEU_fclose(fp);
 963         GameLoaded=1;
 964
 965         FCEU_ResetVidSys();
 966         if(FCEUGameInfo.type!=GIT_NSF)
 967          if(FSettings.GameGenie)
 968           OpenGenie();
 969
 970         PowerNES();
 971         #ifdef NETWORK
 972         if(FSettings.NetworkPlay) InitNetplay();
 973         #endif
 974         SaveStateRefresh();
 975         if(FCEUGameInfo.type!=GIT_NSF)
 976         {
 977          LoadGamePalette();
 978          LoadGameCheats();
 979         }
 980
 981         FCEU_ResetPalette();
 982         Exit=0;
 983         return(&FCEUGameInfo);
 984 }
 985
 986
 987 void FCEU_ResetVidSys(void)
 988 {
 989  int w;
 990
 991  if(FCEUGameInfo.vidsys==GIV_NTSC)
 992   w=0;
 993  else if(FCEUGameInfo.vidsys==GIV_PAL)
 994   w=1;
 995  else
 996   w=FSettings.PAL;
 997
 998  if(w)
 999  {
1000   PAL=1;
1001   scanlines_per_frame=312;
1002   FSettings.FirstSLine=FSettings.UsrFirstSLine[1];
1003   FSettings.LastSLine=FSettings.UsrLastSLine[1];
1004  }
1005  else
1006  {
1007   PAL=0;
1008   scanlines_per_frame=262;
1009   FSettings.FirstSLine=FSettings.UsrFirstSLine[0];
1010   FSettings.LastSLine=FSettings.UsrLastSLine[0];
1011  }
1012  printf("PAL = %i\n", PAL);
1013  SetSoundVariables();
1014 }
1015
1016 int FCEUI_Initialize(void)
1017 {
1018         if(!InitVirtualVideo())
1019          return 0;
1020         memset(&FSettings,0,sizeof(FSettings));
1021         FSettings.UsrFirstSLine[0]=8;
1022         FSettings.UsrFirstSLine[1]=0;
1023         FSettings.UsrLastSLine[0]=FSettings.UsrLastSLine[1]=239;
1024         FSettings.SoundVolume=65535;    // 100%
1025         return 1;
1026 }
1027
1028 #define harko 0xe //0x9
1029 static INLINE void Thingo(void)
1030 {
1031    Loop6502();
1032
1033    if(tosprite>=256)
1034    {
1035     X6502_Run(256-harko);
1036     Fixit1();
1037     X6502_Run(harko);
1038    }
1039    else
1040    {
1041     if(tosprite<=240)
1042     {
1043      X6502_Run(tosprite);
1044      PPU[2]|=0x40;
1045      X6502_Run(256-tosprite-harko);
1046      Fixit1();
1047      X6502_Run(harko);
1048     }
1049     else
1050     {
1051      X6502_Run(256-harko);
1052      Fixit1();
1053      X6502_Run(tosprite-(256-harko));
1054      PPU[2]|=0x40;
1055      X6502_Run(256-tosprite);
1056     }
1057     tosprite=256;
1058    }
1059    DoHBlank();
1060 }
1061 #undef harko
1062
1063 void EmLoop(void)
1064 {
1065  for(;;)
1066  {
1067   ApplyPeriodicCheats();
1068   X6502_Run(256+85);
1069
1070   PPU[2]|=0x80;
1071   PPU[3]=PPUSPL=0;             /* Not sure if this is correct.  According
1072                                   to Matt Conte and my own tests, it is.  Timing is probably
1073                                   off, though.  NOTE:  Not having this here
1074                                   breaks a Super Donkey Kong game. */
1075
1076   X6502_Run(12);                /* I need to figure out the true nature and length
1077                                    of this delay.
1078                                 */
1079   if(FCEUGameInfo.type==GIT_NSF)
1080    TriggerNMINSF();
1081   else if(VBlankON)
1082    TriggerNMI();
1083
1084   X6502_Run((scanlines_per_frame-242)*(256+85)-12);
1085
1086   PPU_status&=0x1f;
1087
1088   X6502_Run(256);
1089   {
1090    static int kook=0;
1091    if(ScreenON || SpriteON)
1092     if(GameHBIRQHook)
1093      GameHBIRQHook();
1094
1095    X6502_Run(85-kook);
1096    kook=(kook+1)&1;
1097   }
1098
1099   if(ScreenON || SpriteON)
1100   {
1101    RefreshAddr=TempAddr;
1102    if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
1103   }
1104   if(FCEUGameInfo.type==GIT_NSF)
1105    X6502_Run((256+85)*240);
1106   else
1107   {
1108    int x,max,maxref;
1109
1110    deemp=PPU[1]>>5;
1111    SetRefreshLine();
1112    for(scanline=0;scanline<240;scanline++)
1113    {
1114     deempcnt[deemp]++;
1115     Thingo();
1116    }
1117    for(x=1,max=0,maxref=0;x<7;x++)
1118    {
1119     if(deempcnt[x]>max)
1120     {
1121      max=deempcnt[x];
1122      maxref=x;
1123     }
1124     deempcnt[x]=0;
1125    }
1126    //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);
1127    //memset(deempcnt,0,sizeof(deempcnt));
1128    SetNESDeemph(maxref,0);
1129   }
1130
1131   {
1132    int ssize;
1133
1134    ssize=FlushEmulateSound();
1135
1136    #ifdef FRAMESKIP
1137    if(FSkip)
1138    {
1139     FCEU_PutImageDummy();
1140     FSkip--;
1141     FCEUD_Update(0,WaveFinalMono,ssize);
1142    }
1143    else
1144    #endif
1145    {
1146     FCEU_PutImage();
1147     FCEUD_Update(XBuf+8,WaveFinalMono,ssize);
1148    }
1149    UpdateInput();
1150   }
1151
1152   if(Exit)
1153   {
1154    CloseGame();
1155    break;
1156   }
1157
1158  }
1159 }
1160
1161 #ifdef FPS
1162 #include <sys/time.h>
1163 uint64 frcount;
1164 #endif
1165 void FCEUI_Emulate(void)
1166 {
1167         #ifdef FPS
1168         uint64 starttime,end;
1169         struct timeval tv;
1170         frcount=0;
1171         gettimeofday(&tv,0);
1172         starttime=((uint64)tv.tv_sec*1000000)+tv.tv_usec;
1173         #endif
1174         EmLoop();
1175
1176         #ifdef FPS
1177         // Probably won't work well on Windows port; for
1178         // debugging/speed testing.
1179         {
1180          uint64 w;
1181          int i,frac;
1182          gettimeofday(&tv,0);
1183          end=((uint64)tv.tv_sec*1000000)+tv.tv_usec;
1184          w=frcount*10000000000LL/(end-starttime);
1185          i=w/10000;
1186          frac=w-i*10000;
1187          printf("Average FPS: %d.%04d\n",i,frac);
1188         }
1189         #endif
1190
1191 }
1192
1193 void FCEUI_CloseGame(void)
1194 {
1195         Exit=1;
1196 }
1197
1198 static void ResetPPU(void)
1199 {
1200         VRAMBuffer=PPU[0]=PPU[1]=PPU[2]=PPU[3]=0;
1201         PPUSPL=0;
1202         PPUGenLatch=0;
1203         RefreshAddr=TempAddr=0;
1204         vtoggle = 0;
1205 }
1206
1207 static void PowerPPU(void)
1208 {
1209         memset(NTARAM,0x00,0x800);
1210         memset(PALRAM,0x00,0x20);
1211         memset(SPRAM,0x00,0x100);
1212         ResetPPU();
1213 }
1214
1215 void ResetNES(void)
1216 {
1217         if(!GameLoaded || (FCEUGameInfo.type==GIT_NSF)) return;
1218         GameInterface(GI_RESETM2);
1219         ResetSound();
1220         ResetPPU();
1221         X6502_Reset();
1222 }
1223
1224 void PowerNES(void)
1225 {
1226         if(!GameLoaded) return;
1227
1228         FCEU_CheatResetRAM();
1229         FCEU_CheatAddRAM(2,0,RAM);
1230
1231         GeniePower();
1232
1233         memset(RAM,0x00,0x800);
1234         ResetMapping();
1235         GameInterface(GI_POWER);
1236         PowerSound();
1237         PowerPPU();
1238         timestampbase=0;
1239         X6502_Power();
1240 }
1241