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 #include        "palette.h"
  52 #include        "movie.h"
  53
  54 #include        "dprintf.h"
  55
  56 #ifdef GP2X
  57 #include        "drivers/gp2x/asmutils.h"
  58 #endif
  59
  60 #define Pal     (PALRAM)
  61
  62
  63 static void (*RefreshLine)(uint8 *P, uint32 vofs) = NULL;
  64 static void PRefreshLine(void);
  65
  66 static void ResetPPU(void);
  67 static void PowerPPU(void);
  68
  69 uint64 timestampbase=0;
  70
  71 static int ppudead=1;
  72 static int kook=0;
  73
  74 int MMC5Hack;
  75 uint32 MMC5HackVROMMask;
  76 uint8 *MMC5HackExNTARAMPtr;
  77 uint8 *MMC5HackVROMPTR;
  78 uint8 MMC5HackCHRMode=0;
  79 uint8 MMC5HackSPMode;
  80 uint8 MMC5HackSPScroll;
  81 uint8 MMC5HackSPPage;
  82
  83 uint8 *MMC5SPRVPage[8];
  84 uint8 *MMC5BGVPage[8];
  85
  86
  87 uint8 VRAMBuffer,PPUGenLatch;
  88
  89 uint8 *vnapage[4];
  90 uint8 PPUNTARAM;
  91 uint8 PPUCHRRAM;
  92
  93 /* Color deemphasis emulation.  Joy... */
  94 static uint8 deemp=0;
  95 static int deempcnt[8];
  96
  97 FCEUGI FCEUGameInfo;
  98 void (*GameInterface)(int h, void *param);
  99
 100 void FP_FASTAPASS(1) (*PPU_hook)(uint32 A);
 101
 102 void (*GameStateRestore)(int version);
 103 void (*GameHBIRQHook)(void), (*GameHBIRQHook2)(void);
 104
 105 readfunc ARead[0x10000];
 106 writefunc BWrite[0x10000];
 107 static readfunc *AReadG;
 108 static writefunc *BWriteG;
 109 static int RWWrap=0;
 110
 111 #ifdef ASM_6502
 112 static void asmcpu_update(int32 cycles)
 113 {
 114  // some code from x6502.c
 115  fhcnt-=cycles;
 116  if(fhcnt<=0)
 117  {
 118   FrameSoundUpdate();
 119   fhcnt+=fhinc;
 120  }
 121
 122  if(PCMIRQCount>0)
 123  {
 124   PCMIRQCount-=cycles;
 125   if(PCMIRQCount<=0)
 126   {
 127    vdis=1;
 128    if((PSG[0x10]&0x80) && !(PSG[0x10]&0x40))
 129    {
 130     extern uint8 SIRQStat;
 131     SIRQStat|=0x80;
 132     X6502_IRQBegin(FCEU_IQDPCM);
 133    }
 134   }
 135  }
 136 }
 137
 138 void asmcpu_unpack(void)
 139 {
 140         nes_registers[0] = X.A << 24;
 141         nes_registers[1] = X.X;
 142         nes_registers[2] = X.Y;
 143         pc_base = 0;
 144         nes_registers[3] = X.PC;
 145         X6502_Rebase_a();
 146         nes_registers[4] = X.S << 24;
 147         nes_registers[4]|= X.IRQlow << 8;
 148         nes_registers[7] = (uint32)X.count << 16;
 149
 150         // NVUB DIZC
 151         nes_registers[4]|= X.P & 0x5d;
 152         nes_registers[5] = X.P << 24; // N
 153         if (!(X.P&0x02)) nes_registers[5] |= 1; // Z
 154 }
 155
 156 void asmcpu_pack(void)
 157 {
 158         X.A = nes_registers[0] >> 24;
 159         X.X = nes_registers[1];
 160         X.Y = nes_registers[2];
 161         X.PC= nes_registers[3] - pc_base;
 162         X.S = nes_registers[4] >> 24;
 163         X.IRQlow = nes_registers[4] >> 8;
 164         X.count = (int32) nes_registers[7] >> 16;
 165
 166         // NVUB DIZC
 167         X.P = nes_registers[4] & 0x5d;
 168         if (  nes_registers[5]&0x80000000)  X.P |= 0x80; // N
 169         if (!(nes_registers[5]&0x000000ff)) X.P |= 0x02; // Z
 170 }
 171 #endif
 172
 173 DECLFW(BNull)
 174 {
 175
 176 }
 177
 178 DECLFR(ANull)
 179 {
 180  return(X.DB);
 181 }
 182
 183 int AllocGenieRW(void)
 184 {
 185  if(!(AReadG=FCEU_malloc(0x8000*sizeof(readfunc))))
 186   return 0;
 187  if(!(BWriteG=FCEU_malloc(0x8000*sizeof(writefunc))))
 188   return 0;
 189  RWWrap=1;
 190  return 1;
 191 }
 192
 193 void FlushGenieRW(void)
 194 {
 195  int32 x;
 196
 197  if(RWWrap)
 198  {
 199   for(x=0;x<0x8000;x++)
 200   {
 201    ARead[x+0x8000]=AReadG[x];
 202    BWrite[x+0x8000]=BWriteG[x];
 203   }
 204 #ifdef ASM_6502
 205   GenieSetPages(1);
 206 #endif
 207   free(AReadG);
 208   free(BWriteG);
 209   AReadG=0;
 210   BWriteG=0;
 211   RWWrap=0;
 212  }
 213 }
 214
 215 readfunc FASTAPASS(1) GetReadHandler(int32 a)
 216 {
 217   if(a>=0x8000 && RWWrap)
 218    return AReadG[a-0x8000];
 219   else
 220    return ARead[a];
 221 }
 222
 223 void FASTAPASS(3) SetReadHandler(int32 start, int32 end, readfunc func)
 224 {
 225   int32 x;
 226
 227   if(!func)
 228    func=ANull;
 229
 230   if(RWWrap)
 231    for(x=end;x>=start;x--)
 232    {
 233     if(x>=0x8000)
 234      AReadG[x-0x8000]=func;
 235     else
 236      ARead[x]=func;
 237    }
 238   else
 239
 240    for(x=end;x>=start;x--)
 241     ARead[x]=func;
 242 }
 243
 244 writefunc FASTAPASS(1) GetWriteHandler(int32 a)
 245 {
 246   if(RWWrap && a>=0x8000)
 247    return BWriteG[a-0x8000];
 248   else
 249    return BWrite[a];
 250 }
 251
 252 void FASTAPASS(3) SetWriteHandler(int32 start, int32 end, writefunc func)
 253 {
 254   int32 x;
 255
 256   if(!func)
 257    func=BNull;
 258
 259   if(RWWrap)
 260    for(x=end;x>=start;x--)
 261    {
 262     if(x>=0x8000)
 263      BWriteG[x-0x8000]=func;
 264     else
 265      BWrite[x]=func;
 266    }
 267   else
 268    for(x=end;x>=start;x--)
 269     BWrite[x]=func;
 270 }
 271
 272 uint8 vtoggle=0;
 273 uint8 XOffset=0;
 274
 275 uint32 TempAddr,RefreshAddr;
 276
 277
 278 /* scanline is equal to the current visible scanline we're on. */
 279
 280 int scanline;
 281
 282 uint8 GameMemBlock[131072] __attribute__ ((aligned (4)));
 283 uint8 NTARAM[0x800] __attribute__ ((aligned (4)));
 284 uint8 PALRAM[0x20] __attribute__ ((aligned (4)));
 285 #if !defined(ASM_6502) || defined(DEBUG_ASM_6502)
 286 uint8 RAM[0x800] __attribute__ ((aligned (4)));
 287 #endif
 288
 289 uint8 PPU[4];
 290 uint8 PPUSPL;
 291
 292 uint8 PAL=0;
 293
 294
 295 #define MMC5BGVRAMADR(V)      &MMC5BGVPage[(V)>>10][(V)]
 296 #define VRAMADR(V)      &VPage[(V)>>10][(V)]
 297
 298 static int linestartts;
 299 static int tofix=0;
 300
 301 static uint8 *Plinef;
 302
 303 extern uint8 sprlinebuf[256+8];
 304 extern int32 sphitx;
 305 extern uint8 sphitdata;
 306
 307 extern int spork;       /* spork the world.  Any sprites on this line?
 308                            Then this will be set to 1.  Needed for zapper
 309                            emulation and *gasp* sprite emulation.
 310                         */
 311
 312 static void ResetRL(uint8 *target)
 313 {
 314  if(InputScanlineHook)
 315   InputScanlineHook(0,0,0,0);
 316  Plinef=target;
 317  linestartts=timestamp*48+X6502_GetCycleCount();
 318  tofix=1;
 319 }
 320
 321 static INLINE void Fixit1(void);
 322
 323 /* faking FCEUPPU_LineUpdate() from later versions of the emu */
 324 static void FakedLineUpdate(void)
 325 {
 326  #define TOFIXNUM (272-0x4)
 327  int lastpixel;
 328
 329  if (scanline >= 240) return;
 330
 331  if (tofix || sphitx != 0x100)
 332  {
 333   lastpixel = (timestamp*48-linestartts)>>4;
 334   if (PAL) lastpixel += lastpixel>>4;
 335   //printf("lastpixel: %i\n", lastpixel);
 336  }
 337
 338  if (tofix && lastpixel>=TOFIXNUM)
 339  {
 340   Fixit1();
 341   tofix=0;
 342  }
 343
 344  // CheckSpriteHit()
 345  if(sphitx!=0x100)
 346  {
 347   int l=lastpixel-16;
 348   int x;
 349
 350   for(x=sphitx;x<(sphitx+8) && x<l;x++)
 351   {
 352    if((sphitdata&(0x80>>(x-sphitx))) && !(Plinef[x]&64))
 353    {
 354     PPU_status|=0x40;
 355     sphitx=0x100;
 356     break;
 357    }
 358   }
 359  }
 360 }
 361
 362
 363 static DECLFW(BRAML)
 364 {
 365         RAM[A]=V;
 366 }
 367
 368 static DECLFW(BRAMH)
 369 {
 370         RAM[A&0x7FF]=V;
 371 }
 372
 373 static DECLFR(ARAML)
 374 {
 375         return RAM[A];
 376 }
 377
 378 static DECLFR(ARAMH)
 379 {
 380         return RAM[A&0x7FF];
 381 }
 382
 383
 384 static DECLFR(A2002)
 385 {
 386         /* merged */
 387                         uint8 ret;
 388
 389                         FakedLineUpdate();
 390                         ret = PPU_status;
 391                         ret|=PPUGenLatch&0x1F;
 392                         vtoggle=0;
 393                         PPU_status&=0x7F;
 394                          PPUGenLatch=ret;
 395                         //dprintf("r [2002] %02x",ret);
 396                         return ret;
 397 }
 398
 399 static DECLFR(A200x)
 400 {
 401         /* merged */
 402                         FakedLineUpdate();
 403                         return PPUGenLatch;
 404 }
 405
 406 static DECLFR(A2007)
 407 {
 408         /* merged */
 409                         uint8 ret;
 410                         uint32 tmp=RefreshAddr&0x3FFF;
 411
 412                         FakedLineUpdate();
 413
 414                         ret=VRAMBuffer;
 415
 416                         if(PPU_hook) PPU_hook(tmp);
 417                         PPUGenLatch=VRAMBuffer;
 418                         if(tmp<0x2000)
 419                         {
 420                          VRAMBuffer=VPage[tmp>>10][tmp];
 421                         }
 422                         else
 423                         {
 424                          VRAMBuffer=vnapage[(tmp>>10)&0x3][tmp&0x3FF];
 425                         }
 426
 427                         if (INC32) RefreshAddr+=32;
 428                         else RefreshAddr++;
 429                         if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
 430                         dprintf("r [2007] %02x",ret);
 431                         return ret;
 432 }
 433
 434 static DECLFW(B2000)
 435 {
 436         /* NMI2? */
 437                 FakedLineUpdate();
 438                 PPUGenLatch=V;
 439                 PPU[0]=V;
 440                 TempAddr&=0xF3FF;
 441                 TempAddr|=(V&3)<<10;
 442 }
 443
 444 static DECLFW(B2001)
 445 {
 446         /* merged */
 447                   FakedLineUpdate();
 448                   PPUGenLatch=V;
 449                   PPU[1]=V;
 450                   if(V&0xE0)
 451                    deemp=V>>5;
 452                   //printf("$%04x:$%02x, %d\n",X.PC,V,scanline);
 453 }
 454
 455 static DECLFW(B2002)
 456 {
 457         /* merged */
 458                  PPUGenLatch=V;
 459 }
 460
 461 static DECLFW(B2003)
 462 {
 463         /* merged */
 464                 PPUGenLatch=V;
 465                 PPU[3]=V;
 466                 PPUSPL=V&0x7;
 467 }
 468
 469 static DECLFW(B2004)
 470 {
 471         /* merged */
 472                 PPUGenLatch=V;
 473                 if(PPUSPL>=8)
 474                 {
 475                  if(PPU[3]>=8)
 476                   SPRAM[PPU[3]]=V;
 477                 }
 478                 else
 479                 {
 480                  //printf("$%02x:$%02x\n",PPUSPL,V);
 481                  SPRAM[PPUSPL]=V;
 482                 }
 483                 PPU[3]++;
 484                 PPUSPL++;
 485
 486 }
 487
 488 static DECLFW(B2005)
 489 {
 490         /* merged */
 491                 uint32 tmp=TempAddr;
 492                 FakedLineUpdate();
 493                 PPUGenLatch=V;
 494                 if (!vtoggle)
 495                 {
 496                  tmp&=0xFFE0;
 497                  tmp|=V>>3;
 498                  XOffset=V&7;
 499                 }
 500                 else
 501                 {
 502                  tmp&=0x8C1F;
 503                  tmp|=((V&~0x7)<<2);
 504                  tmp|=(V&7)<<12;
 505                 }
 506
 507                 TempAddr=tmp;
 508                 vtoggle^=1;
 509 }
 510
 511 static DECLFW(B2006)
 512 {
 513         /* merged */
 514                        FakedLineUpdate();
 515
 516                        PPUGenLatch=V;
 517                        if(!vtoggle)
 518                        {
 519                         TempAddr&=0x00FF;
 520                         TempAddr|=(V&0x3f)<<8;
 521                        }
 522                        else
 523                        {
 524                         TempAddr&=0xFF00;
 525                         TempAddr|=V;
 526
 527                         RefreshAddr=TempAddr;
 528                         if(PPU_hook)
 529                          PPU_hook(RefreshAddr);
 530                        }
 531                       vtoggle^=1;
 532 }
 533
 534 static DECLFW(B2007)
 535 {
 536         /* merged */
 537                         uint32 tmp=RefreshAddr&0x3FFF;
 538                         PPUGenLatch=V;
 539                         if(tmp>=0x3F00)
 540                         {
 541                          // hmmm....
 542                          if(!(tmp&0xf))
 543                           PALRAM[0x00]=PALRAM[0x04]=PALRAM[0x08]=PALRAM[0x0C]=V&0x3f;
 544                          else if(tmp&3) PALRAM[(tmp&0x1f)]=V&0x3f;
 545                         }
 546                         else if(tmp<0x2000)
 547                         {
 548                           if(PPUCHRRAM&(1<<(tmp>>10)))
 549                             VPage[tmp>>10][tmp]=V;
 550                         }
 551                         else
 552                         {
 553                          if(PPUNTARAM&(1<<((tmp&0xF00)>>10)))
 554                           vnapage[((tmp&0xF00)>>10)][tmp&0x3FF]=V;
 555                         }
 556                         if (INC32) RefreshAddr+=32;
 557                         else RefreshAddr++;
 558                         if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
 559 }
 560
 561 static DECLFW(B4014)
 562 {
 563         uint32 t=V<<8;
 564         int x;
 565
 566         for(x=0;x<256;x++)
 567          B2004(0x2004,X.DB=ARead[t+x](t+x));
 568         X6502_AddCycles(512);
 569 }
 570
 571 void BGRender(uint8 *target)
 572 {
 573         uint32 tem, vofs;
 574         vofs=((PPU[0]&0x10)<<8) | ((RefreshAddr>>12)&7);
 575
 576         Pal[0]|=64;
 577         Pal[4]|=64;
 578         Pal[8]|=64;
 579         Pal[0xC]|=64;
 580         RefreshLine(target-XOffset, vofs);
 581         Pal[0]&=63;
 582         Pal[4]&=63;
 583         Pal[8]&=63;
 584         Pal[0xC]&=63;
 585
 586         if(!(PPU[1]&2))
 587         {
 588          tem=Pal[0]|0x40;
 589          tem|=tem<<8;
 590          tem|=tem<<16;
 591          *(uint32 *)target=*(uint32 *)(target+4)=tem;
 592         }
 593 }
 594
 595 #ifdef FRAMESKIP
 596 int FSkip=0;
 597 void FCEUI_FrameSkip(int x)
 598 {
 599  FSkip=x;
 600 }
 601 #endif
 602
 603 /*      This is called at the beginning of each visible scanline */
 604 static void LineUpdate(uint8 *target)
 605 {
 606         uint32 tem;
 607
 608         /* PRefreshLine() will not get called on skipped frames.  This
 609          * could cause a problem, but the solution would be rather complex,
 610          * due to the current sprite 0 hit code.
 611          */
 612         if(FSkip) return;
 613
 614         if(scanline < FSettings.FirstSLine || scanline > FSettings.LastSLine)
 615         {
 616            if(PPU_hook)
 617             PRefreshLine();
 618         }
 619         else
 620         {
 621          if(ScreenON)
 622          {
 623            BGRender(target);
 624          }
 625          else
 626          {
 627            tem=Pal[0]|0x40;
 628            tem|=tem << 8;
 629            tem|=tem << 16;
 630            FCEU_dwmemset(target,tem,256);
 631          }
 632         }
 633
 634         if(InputScanlineHook)
 635          InputScanlineHook(target,spork?sprlinebuf:0,linestartts,256);
 636 }
 637
 638
 639 static void LineUpdateEnd(uint8 *target)
 640 {
 641 #ifdef GP2X
 642  if(ScreenON || SpriteON)  // Yes, very el-cheapo.
 643  {
 644   if(PPU[1]&0x01)
 645    block_and(target, 256, 0x30);
 646  }
 647  if((PPU[1]>>5)==0x7)
 648   block_or(target, 256, 0xc0);
 649  else if(PPU[1]&0xE0)
 650   block_or(target, 256, 0x40);
 651  else
 652   block_andor(target, 256, 0x3f, 0x80);
 653 #else
 654  int x;
 655
 656  if(ScreenON || SpriteON)  // Yes, very el-cheapo.
 657  {
 658   if(PPU[1]&0x01)
 659   {
 660    for(x=63;x>=0;x--)
 661    *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])&0x30303030;
 662   }
 663  }
 664  if((PPU[1]>>5)==0x7)
 665  {
 666   for(x=63;x>=0;x--)
 667    *(uint32 *)&target[x<<2]=((*(uint32*)&target[x<<2])&0x3f3f3f3f)|0xc0c0c0c0;
 668  }
 669  else if(PPU[1]&0xE0)
 670   for(x=63;x>=0;x--)
 671    *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])|0x40404040;
 672  else
 673   for(x=63;x>=0;x--)
 674    *(uint32 *)&target[x<<2]=((*(uint32*)&target[x<<2])&0x3f3f3f3f)|0x80808080;
 675 #endif
 676
 677  // black borders
 678  ((uint32 *)target)[-2]=((uint32 *)target)[-1]=0;
 679  ((uint32 *)target)[64]=((uint32 *)target)[65]=0;
 680 }
 681
 682 #define PAL(c)  ((c)+cc)
 683
 684
 685 static void PRefreshLine(void)
 686 {
 687          uint32 vofs;
 688          int X1;
 689          vofs=((PPU[0]&0x10)<<8) | ((RefreshAddr>>12)&7);
 690          void (*PPU_hook_)(uint32 A) = PPU_hook;
 691
 692
 693          for(X1=33;X1;X1--)
 694          {
 695                 uint32 zz2;
 696                 uint32 vadr;
 697
 698                 zz2=(RefreshAddr>>10)&3;
 699                 PPU_hook_(0x2000|(RefreshAddr&0xFFF));
 700
 701                 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
 702
 703                 PPU_hook_(vadr);
 704
 705                 if((RefreshAddr&0x1f)==0x1f)
 706                  RefreshAddr^=0x41F;
 707                 else
 708                  RefreshAddr++;
 709          }
 710 }
 711
 712 /* This high-level graphics MMC5 emulation code was written
 713    for MMC5 carts in "CL" mode.  It's probably not totally
 714    correct for carts in "SL" mode.
 715    */
 716 static void RefreshLine_MMC5Hack1(uint8 *P, uint32 vofs)
 717 {
 718           int8 tochange, X1;
 719
 720           tochange=MMC5HackSPMode&0x1F;
 721
 722           for(X1=33;X1;X1--,P+=8)
 723           {
 724                 uint8 *C;
 725                 uint8 cc,zz,zz2;
 726                 uint32 vadr;
 727
 728                 if((tochange<=0 && MMC5HackSPMode&0x40) ||
 729                    (tochange>0 && !(MMC5HackSPMode&0x40)))
 730                 {
 731                  uint8 xs,ys;
 732
 733                  xs=33-X1;
 734                  ys=((scanline>>3)+MMC5HackSPScroll)&0x1F;
 735                  if(ys>=0x1E) ys-=0x1E;
 736                  vadr=(MMC5HackExNTARAMPtr[xs|(ys<<5)]<<4)+(vofs&7);
 737
 738                  C = MMC5HackVROMPTR+vadr;
 739                  C += ((MMC5HackSPPage & 0x3f & MMC5HackVROMMask) << 12);
 740
 741                  cc=MMC5HackExNTARAMPtr[0x3c0+(xs>>2)+((ys&0x1C)<<1)];
 742                  cc=((cc >> ((xs&2) + ((ys&0x2)<<1))) &3) <<2;
 743                 }
 744                 else
 745                 {
 746                  zz=RefreshAddr&0x1F;
 747                  zz2=(RefreshAddr>>10)&3;
 748                  vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
 749                  C = MMC5BGVRAMADR(vadr);
 750                  cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
 751                  cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
 752                 }
 753                 #include "fceline.h"
 754
 755                 if((RefreshAddr&0x1f)==0x1f)
 756                  RefreshAddr^=0x41F;
 757                 else
 758                  RefreshAddr++;
 759                 tochange--;
 760           }
 761 }
 762
 763 static void RefreshLine_MMC5Hack2(uint8 *P, uint32 vofs)
 764 {
 765           int8 tochange, X1;
 766
 767           tochange=MMC5HackSPMode&0x1F;
 768
 769           for(X1=33;X1;X1--,P+=8)
 770           {
 771                 uint8 *C;
 772                 uint8 cc;
 773                 uint8 zz2;
 774                 uint32 vadr;
 775
 776                 if((tochange<=0 && MMC5HackSPMode&0x40) ||
 777                    (tochange>0 && !(MMC5HackSPMode&0x40)))
 778                 {
 779                  uint8 xs,ys;
 780
 781                  xs=33-X1;
 782                  ys=((scanline>>3)+MMC5HackSPScroll)&0x1F;
 783                  if(ys>=0x1E) ys-=0x1E;
 784                  vadr=(MMC5HackExNTARAMPtr[xs|(ys<<5)]<<4)+(vofs&7);
 785
 786                  C = MMC5HackVROMPTR+vadr;
 787                  C += ((MMC5HackSPPage & 0x3f & MMC5HackVROMMask) << 12);
 788
 789                  cc=MMC5HackExNTARAMPtr[0x3c0+(xs>>2)+((ys&0x1C)<<1)];
 790                  cc=((cc >> ((xs&2) + ((ys&0x2)<<1))) &3) <<2;
 791                 }
 792                 else
 793                 {
 794                  C=MMC5HackVROMPTR;
 795                  zz2=(RefreshAddr>>10)&3;
 796                  vadr = (vnapage[zz2][RefreshAddr & 0x3ff] << 4) + vofs;
 797                  C += (((MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff]) & 0x3f &
 798                          MMC5HackVROMMask) << 12) + (vadr & 0xfff);
 799                  vadr = (MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff] & 0xC0)>> 4;
 800                  cc = vadr;
 801                 }
 802                 #include "fceline.h"
 803                 if((RefreshAddr&0x1f)==0x1f)
 804                  RefreshAddr^=0x41F;
 805                 else
 806                  RefreshAddr++;
 807                 tochange--;
 808           }
 809 }
 810
 811 static void RefreshLine_MMC5Hack3(uint8 *P, uint32 vofs)
 812 {
 813           int8 X1;
 814
 815           for(X1=33;X1;X1--,P+=8)
 816           {
 817                 uint8 *C;
 818                 uint8 cc;
 819                 uint8 zz2;
 820                 uint32 vadr;
 821
 822                 C=MMC5HackVROMPTR;
 823                 zz2=(RefreshAddr>>10)&3;
 824                 vadr = (vnapage[zz2][RefreshAddr & 0x3ff] << 4) + vofs;
 825                 C += (((MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff]) & 0x3f &
 826                         MMC5HackVROMMask) << 12) + (vadr & 0xfff);
 827                 vadr = (MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff] & 0xC0)>> 4;
 828                 cc = vadr;
 829
 830                 #include "fceline.h"
 831                 if((RefreshAddr&0x1f)==0x1f)
 832                  RefreshAddr^=0x41F;
 833                 else
 834                  RefreshAddr++;
 835           }
 836 }
 837
 838 static void RefreshLine_MMC5Hack4(uint8 *P, uint32 vofs)
 839 {
 840           int8 X1;
 841
 842           for(X1=33;X1;X1--,P+=8)
 843           {
 844                 uint8 *C;
 845                 uint8 cc,zz,zz2;
 846                 uint32 vadr;
 847
 848                 zz=RefreshAddr&0x1F;
 849                 zz2=(RefreshAddr>>10)&3;
 850                 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
 851                 C = MMC5BGVRAMADR(vadr);
 852                 cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
 853                 cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
 854
 855                 #include "fceline.h"
 856
 857                 if((RefreshAddr&0x1f)==0x1f)
 858                  RefreshAddr^=0x41F;
 859                 else
 860                  RefreshAddr++;
 861           }
 862 }
 863
 864 static void RefreshLine_PPU_hook(uint8 *P, uint32 vofs)
 865 {
 866          int8 X1;
 867          void (*PPU_hook_)(uint32 A) = PPU_hook;
 868          uint32 rfraddr = RefreshAddr;
 869          uint8 *page = vnapage[(rfraddr>>10)&3];
 870
 871          for(X1=33;X1;X1--,P+=8)
 872          {
 873                 uint8 *C;
 874                 uint8 cc,zz;
 875                 uint32 vadr;
 876
 877                 zz=rfraddr&0x1F;
 878                 PPU_hook_(0x2000|(rfraddr&0xFFF));
 879                 cc=page[0x3c0+(zz>>2)+((rfraddr&0x380)>>4)];
 880                 cc=((cc >> ((zz&2) + ((rfraddr&0x40)>>4))) &3) <<2;
 881                 vadr=(page[rfraddr&0x3ff]<<4)+vofs;
 882                 C = VRAMADR(vadr);
 883
 884                 #include "fceline.h"
 885
 886                 PPU_hook_(vadr);
 887
 888                 if((rfraddr&0x1f)==0x1f) {
 889                  rfraddr^=0x41F;
 890                  page = vnapage[(rfraddr>>10)&3];
 891                 } else
 892                  rfraddr++;
 893          }
 894          RefreshAddr = rfraddr;
 895 }
 896
 897 static void RefreshLine_normal(uint8 *P, uint32 vofs) // vofs is 0x107 max
 898 {
 899          int8 X1;
 900          uint32 rfraddr = RefreshAddr;
 901          uint8 *page = vnapage[(rfraddr>>10)&3];
 902          uint32 cc2=0;
 903
 904          if ((rfraddr&0xc)!=0)
 905           cc2=*(uint32 *) (page + ((rfraddr&0x380)>>4) + ((rfraddr&0x10)>>2) + 0x3c0);
 906
 907          for (X1=33;X1;X1--,P+=8)
 908          {
 909                 uint8 cc,*C;
 910                 uint32 vadr;
 911
 912                 vadr=(page[rfraddr&0x3ff]<<4)+vofs;
 913                 C = VRAMADR(vadr);
 914                 if ((rfraddr&0xc)==0)
 915                  cc2=*(uint32 *) (page + ((rfraddr&0x380)>>4) + ((rfraddr&0x10)>>2) + 0x3c0);
 916                 cc=((cc2 >> ((rfraddr&2) + ((rfraddr&0x40)>>4) + ((rfraddr&0xc)<<1))) & 3) << 2;
 917
 918                 #include "fceline.h"
 919
 920                 if((rfraddr&0x1f)==0x1f) {
 921                  rfraddr^=0x41F;
 922                  page = vnapage[(rfraddr>>10)&3];
 923                 } else
 924                  rfraddr++;
 925          }
 926          RefreshAddr = rfraddr;
 927 }
 928
 929 static void SetRefreshLine(void)
 930 {
 931         if(MMC5Hack && geniestage!=1)
 932         {
 933          if(MMC5HackCHRMode==0 && (MMC5HackSPMode&0x80))
 934          {
 935                  if (RefreshLine != RefreshLine_MMC5Hack1) printf("set refr RefreshLine_MMC5Hack1\n");
 936                  RefreshLine = RefreshLine_MMC5Hack1;
 937          }
 938          else if(MMC5HackCHRMode==1 && (MMC5HackSPMode&0x80))
 939          {
 940                 if (RefreshLine != RefreshLine_MMC5Hack2) printf("set refr RefreshLine_MMC5Hack2\n");
 941                  RefreshLine = RefreshLine_MMC5Hack2;
 942          }
 943          else if(MMC5HackCHRMode==1)
 944          {
 945                 if (RefreshLine != RefreshLine_MMC5Hack3) printf("set refr RefreshLine_MMC5Hack3\n");
 946                  RefreshLine = RefreshLine_MMC5Hack3;
 947          }
 948          else
 949          {
 950                 if (RefreshLine != RefreshLine_MMC5Hack4) printf("set refr RefreshLine_MMC5Hack4\n");
 951                  RefreshLine = RefreshLine_MMC5Hack4;
 952          }
 953         }       // End if(MMC5Hack)
 954         else if(PPU_hook)
 955         {
 956                 if (RefreshLine != RefreshLine_PPU_hook) printf("set refr RefreshLine_PPU_hook\n");
 957                 RefreshLine = RefreshLine_PPU_hook;
 958         }
 959         else
 960         {
 961                 if (RefreshLine != RefreshLine_normal) printf("set refr RefreshLine_normal\n");
 962                 RefreshLine = RefreshLine_normal;
 963         }
 964 }
 965
 966 static INLINE
 967 void Fixit2(void)
 968 {
 969    if(ScreenON || SpriteON)
 970    {
 971     uint32 rad=RefreshAddr;
 972     rad&=0xFBE0;
 973     rad|=TempAddr&0x041f;
 974     RefreshAddr=rad;
 975     //PPU_hook(RefreshAddr,-1);
 976    }
 977 }
 978
 979 static INLINE
 980 void Fixit1(void)
 981 {
 982    if(ScreenON || SpriteON)
 983    {
 984     uint32 rad=RefreshAddr;
 985
 986     if((rad&0x7000)==0x7000)
 987     {
 988      rad^=0x7000;
 989      if((rad&0x3E0)==0x3A0)
 990      {
 991       rad^=0x3A0;
 992       rad^=0x800;
 993      }
 994      else
 995      {
 996       if((rad&0x3E0)==0x3e0)
 997        rad^=0x3e0;
 998       else rad+=0x20;
 999      }
1000     }
1001     else
1002      rad+=0x1000;
1003     RefreshAddr=rad;
1004     //PPU_hook(RefreshAddr,-1);
1005    }
1006 }
1007
1008
1009 // ============================//
1010 // end of new code
1011 // ===========================//
1012
1013 void ResetMapping(void)
1014 {
1015         int x;
1016
1017         SetReadHandler(0x0000,0xFFFF,ANull);
1018         SetWriteHandler(0x0000,0xFFFF,BNull);
1019
1020         SetReadHandler(0,0x7FF,ARAML);
1021         SetWriteHandler(0,0x7FF,BRAML);
1022
1023         SetReadHandler(0x800,0x1FFF,ARAMH);  /* Part of a little */
1024         SetWriteHandler(0x800,0x1FFF,BRAMH); /* hack for a small speed boost. */
1025
1026         for(x=0x2000;x<0x4000;x+=8)
1027         {
1028          ARead[x]=A200x;
1029          BWrite[x]=B2000;
1030          ARead[x+1]=A200x;
1031          BWrite[x+1]=B2001;
1032          ARead[x+2]=A2002;
1033          BWrite[x+2]=B2002;
1034          ARead[x+3]=A200x;
1035          BWrite[x+3]=B2003;
1036          ARead[x+4]=A200x;
1037          BWrite[x+4]=B2004;
1038          ARead[x+5]=A200x;
1039          BWrite[x+5]=B2005;
1040          ARead[x+6]=A200x;
1041          BWrite[x+6]=B2006;
1042          ARead[x+7]=A2007;
1043          BWrite[x+7]=B2007;
1044         }
1045
1046         BWrite[0x4014]=B4014;
1047         SetNESSoundMap();
1048         InitializeInput();
1049 }
1050
1051 int GameLoaded=0;
1052 void CloseGame(void)
1053 {
1054  FCEUI_StopMovie();
1055  if(GameLoaded)
1056  {
1057   if(FCEUGameInfo.type!=GIT_NSF)
1058    FCEU_FlushGameCheats(0,0);
1059   #ifdef NETWORK
1060   if(FSettings.NetworkPlay) KillNetplay();
1061   #endif
1062   GameInterface(GI_CLOSE, 0);
1063   CloseGenie();
1064   GameLoaded=0;
1065  }
1066 }
1067
1068 void ResetGameLoaded(void)
1069 {
1070         if(GameLoaded) CloseGame();
1071         GameStateRestore=0;
1072         PPU_hook=0;
1073         GameHBIRQHook=GameHBIRQHook2=0;
1074         GameExpSound.Fill=0;
1075         GameExpSound.RChange=0;
1076         if(GameExpSound.Kill)
1077          GameExpSound.Kill();
1078         GameExpSound.Kill=0;
1079         MapIRQHook=0;
1080         MMC5Hack=0;
1081         PAL&=1;
1082         pale=0;
1083
1084         FCEUGameInfo.name=0;
1085         FCEUGameInfo.type=GIT_CART;
1086         FCEUGameInfo.vidsys=GIV_USER;
1087         FCEUGameInfo.input[0]=FCEUGameInfo.input[1]=-1;
1088         FCEUGameInfo.inputfc=-1;
1089 }
1090
1091 char lastLoadedGameName [2048];
1092 int LoadGameLastError = 0;
1093 int UNIFLoad(const char *name, int fp);
1094 int iNESLoad(const char *name, int fp);
1095 int FDSLoad(const char *name, int fp);
1096 int NSFLoad(int fp);
1097
1098 FCEUGI *FCEUI_LoadGame(char *name)
1099 {
1100         char name2[512];
1101         int have_movie = 0;
1102         int fp;
1103
1104         //Exit=1;
1105         LoadGameLastError = 0;
1106         ResetGameLoaded();
1107
1108         strncpy(name2, name, sizeof(name2));
1109         name2[sizeof(name2)-1] = 0;
1110
1111         fp=FCEU_fopen(name2,"rb");
1112         if(!fp)
1113         {
1114          FCEU_PrintError("Error opening \"%s\"!",name);
1115          LoadGameLastError = 1;
1116          return 0;
1117         }
1118
1119         {
1120          char *p = name2 + strlen(name2) - 4;
1121          if (strcmp(p, ".fcm") == 0)
1122          {
1123           // movie detected
1124           printf("movie detected\n");
1125           FCEU_fclose(fp);
1126           *p = 0;
1127           fp=FCEU_fopen(name2,"rb");
1128           if (!fp && p - name2 > 2)  p[-2] = 0;
1129           fp=FCEU_fopen(name2,"rb");
1130           if (!fp) {
1131            printf("no ROM for movie\n");
1132            LoadGameLastError = 2;
1133            return 0;
1134           }
1135           have_movie = 1;
1136          }
1137         }
1138
1139         GetFileBase(name2);
1140         if(iNESLoad(name2,fp))
1141          goto endlseq;
1142         if(NSFLoad(fp))
1143          goto endlseq;
1144         if(FDSLoad(name2,fp))
1145          goto endlseq;
1146         if(UNIFLoad(name2,fp))
1147          goto endlseq;
1148
1149         FCEU_PrintError("An error occurred while loading the file.");
1150         FCEU_fclose(fp);
1151         // format handlers may set LoadGameLastError themselves.
1152         if (LoadGameLastError == 0) LoadGameLastError = 3;
1153         return 0;
1154
1155         endlseq:
1156         FCEU_fclose(fp);
1157         GameLoaded=1;
1158
1159         FCEU_ResetVidSys();
1160         if(FCEUGameInfo.type!=GIT_NSF)
1161          if(FSettings.GameGenie)
1162           OpenGenie();
1163
1164         PowerNES();
1165         #ifdef NETWORK
1166         if(FSettings.NetworkPlay) InitNetplay();
1167         #endif
1168         SaveStateRefresh();
1169         if(FCEUGameInfo.type!=GIT_NSF)
1170         {
1171          FCEU_LoadGamePalette();
1172          FCEU_LoadGameCheats(0);
1173         }
1174
1175         FCEU_ResetPalette();
1176         Exit=0;
1177
1178         if (have_movie)
1179                 FCEUI_LoadMovie(name, 1);
1180
1181         strcpy(lastLoadedGameName, name2);
1182
1183         return(&FCEUGameInfo);
1184 }
1185
1186
1187 void FCEU_ResetVidSys(void)
1188 {
1189  int w;
1190
1191  if(FCEUGameInfo.vidsys==GIV_NTSC)
1192   w=0;
1193  else if(FCEUGameInfo.vidsys==GIV_PAL)
1194   w=1;
1195  else
1196   w=FSettings.PAL;
1197
1198  if(w)
1199  {
1200   PAL=1;
1201   FSettings.FirstSLine=FSettings.UsrFirstSLine[1];
1202   FSettings.LastSLine=FSettings.UsrLastSLine[1];
1203  }
1204  else
1205  {
1206   PAL=0;
1207   FSettings.FirstSLine=FSettings.UsrFirstSLine[0];
1208   FSettings.LastSLine=FSettings.UsrLastSLine[0];
1209  }
1210  printf("ResetVidSys: PAL = %i\n", PAL);
1211  SetSoundVariables();
1212 }
1213
1214 int FCEUI_Initialize(void)
1215 {
1216         if(!InitVirtualVideo())
1217          return 0;
1218         memset(&FSettings,0,sizeof(FSettings));
1219         FSettings.UsrFirstSLine[0]=8;
1220         FSettings.UsrFirstSLine[1]=0;
1221         FSettings.UsrLastSLine[0]=FSettings.UsrLastSLine[1]=239;
1222         FSettings.SoundVolume=100;
1223         return 1;
1224 }
1225
1226 void MMC5_hb(int);     /* Ugh ugh ugh. */
1227 static void DoLine(void)
1228 {
1229    uint8 *target=XBuf+scanline*320+32;
1230
1231    LineUpdate(target);
1232
1233    if(MMC5Hack && (ScreenON || SpriteON)) MMC5_hb(scanline);
1234
1235    X6502_Run(256);
1236
1237    // check: Battletoads & Double Dragon, Addams Family
1238    // sky glitches in SMB1 if done wrong
1239    FakedLineUpdate();
1240
1241 #ifdef FRAMESKIP
1242    if(!FSkip)
1243 #endif
1244    if(scanline>=FSettings.FirstSLine && scanline<=FSettings.LastSLine)
1245    {
1246     if(SpriteON && spork)
1247      CopySprites(target);
1248
1249     LineUpdateEnd(target);
1250    }
1251    sphitx=0x100;
1252
1253    if(ScreenON || SpriteON)
1254     FetchSpriteData();
1255
1256    // DoHBlank();
1257    if(GameHBIRQHook && (ScreenON || SpriteON) && ((PPU[0]&0x38)!=0x18))
1258    {
1259     X6502_Run(6);
1260     Fixit2();
1261     X6502_Run(4);
1262     GameHBIRQHook();
1263     X6502_Run(85-10-16);
1264    }
1265    else
1266    {
1267     X6502_Run(6);  // Tried 65, caused problems with Slalom(maybe others)
1268     Fixit2();
1269     X6502_Run(85-6-16);
1270    }
1271
1272    if(SpriteON)
1273     RefreshSprites();
1274    if(GameHBIRQHook2 && (ScreenON || SpriteON))
1275     GameHBIRQHook2();
1276    scanline++;
1277    if (scanline<240)
1278     ResetRL(XBuf+scanline*320+32);
1279    X6502_Run(16);
1280 }
1281
1282
1283 void EmLoop(void)
1284 {
1285  for(;;)
1286  {
1287   int x;
1288   uint32 scanlines_per_frame = PAL ? 312 : 262;
1289   UpdateInput();
1290   FCEU_ApplyPeriodicCheats();
1291
1292   // FCEUPPU_Loop:
1293   if(ppudead) /* Needed for Knight Rider, possibly others. */
1294   {
1295    //memset(XBuf, 0, 320*240);
1296    X6502_Run(scanlines_per_frame*(256+85));
1297    ppudead--;
1298    goto update;
1299   }
1300
1301   X6502_Run(256+85);
1302
1303   PPU[2]|=0x80;
1304   PPU[3]=PPUSPL=0;             /* Not sure if this is correct.  According
1305                                   to Matt Conte and my own tests, it is.  Timing is probably
1306                                   off, though.  NOTE:  Not having this here
1307                                   breaks a Super Donkey Kong game. */
1308
1309   X6502_Run(12);                /* I need to figure out the true nature and length
1310                                    of this delay.
1311                                 */
1312   if(FCEUGameInfo.type==GIT_NSF)
1313    DoNSFFrame();
1314   else if(VBlankON)
1315    TriggerNMI();
1316
1317   // Note: this is needed for asm core
1318   // Warning: using 'scanline' var here breaks Castlevania III
1319   {
1320    int lines;
1321    X6502_Run(256+85-12);
1322    for (lines=scanlines_per_frame-242-1;lines;lines--)
1323      X6502_Run(256+85);
1324   }
1325   // X6502_Run((scanlines_per_frame-242)*(256+85)-12);
1326   PPU_status&=0x1f;
1327   X6502_Run(256);
1328
1329   {
1330    if(ScreenON || SpriteON)
1331    {
1332     if(GameHBIRQHook)
1333      GameHBIRQHook();
1334      if(PPU_hook)
1335       for(x=0;x<42;x++) {PPU_hook(0x2000); PPU_hook(0);} // ugh
1336     if(GameHBIRQHook2)
1337      GameHBIRQHook2();
1338    }
1339
1340    X6502_Run(85-16);
1341
1342    if(ScreenON || SpriteON)
1343    {
1344     RefreshAddr=TempAddr;
1345     if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
1346    }
1347    spork=0;
1348    ResetRL(XBuf+32);
1349
1350    X6502_Run(16-kook);
1351    kook ^= 1;
1352   }
1353
1354   if(FCEUGameInfo.type==GIT_NSF)
1355   {
1356    // run scanlines for asm core to fuction
1357    for(scanline=0;scanline<240;scanline++)
1358     X6502_Run(256+85);
1359   }
1360   else
1361   {
1362    int x,max,maxref;
1363
1364    deemp=PPU[1]>>5;
1365    SetRefreshLine();
1366    for(scanline=0;scanline<240;)       // scanline is incremented in  DoLine.  Evil. :/
1367    {
1368     deempcnt[deemp]++;
1369     DoLine();
1370    }
1371    if(MMC5Hack && (ScreenON || SpriteON)) MMC5_hb(scanline);
1372    for(x=1,max=0,maxref=0;x<7;x++)
1373    {
1374     if(deempcnt[x]>max)
1375     {
1376      max=deempcnt[x];
1377      maxref=x;
1378     }
1379     deempcnt[x]=0;
1380    }
1381    SetNESDeemph(maxref,0);
1382   }
1383
1384 update:
1385   if(Exit)
1386   {
1387    //CloseGame();
1388    break;
1389   }
1390
1391   {
1392    int ssize;
1393
1394    ssize=FlushEmulateSound();
1395
1396    timestampbase += timestamp;
1397    timestamp = 0;
1398
1399    #ifdef FRAMESKIP
1400    if(FSkip)
1401    {
1402     FCEU_PutImageDummy();
1403     FSkip--;
1404     FCEUD_Update(0,WaveFinalMono,ssize);
1405    }
1406    else
1407    #endif
1408    {
1409     FCEU_PutImage();
1410     FCEUD_Update(XBuf+8,WaveFinalMono,ssize);
1411    }
1412   }
1413
1414  } // for
1415 }
1416
1417 #ifdef FPS
1418 #include <sys/time.h>
1419 uint64 frcount;
1420 #endif
1421 void FCEUI_Emulate(void)
1422 {
1423         #ifdef FPS
1424         uint64 starttime,end;
1425         struct timeval tv;
1426         frcount=0;
1427         gettimeofday(&tv,0);
1428         starttime=((uint64)tv.tv_sec*1000000)+tv.tv_usec;
1429         #endif
1430         EmLoop();
1431
1432         #ifdef FPS
1433         // Probably won't work well on Windows port; for
1434         // debugging/speed testing.
1435         {
1436          uint64 w;
1437          int i,frac;
1438          gettimeofday(&tv,0);
1439          end=((uint64)tv.tv_sec*1000000)+tv.tv_usec;
1440          w=frcount*10000000000LL/(end-starttime);
1441          i=w/10000;
1442          frac=w-i*10000;
1443          printf("Average FPS: %d.%04d\n",i,frac);
1444         }
1445         #endif
1446
1447 }
1448
1449 void FCEUI_CloseGame(void)
1450 {
1451         Exit=1;
1452 }
1453
1454 static void ResetPPU(void)
1455 {
1456         VRAMBuffer=PPU[0]=PPU[1]=PPU[2]=PPU[3]=0;
1457         PPUSPL=0;
1458         PPUGenLatch=0;
1459         RefreshAddr=TempAddr=0;
1460         vtoggle = 0;
1461         ppudead = 2;
1462         kook = 0;
1463 }
1464
1465 static void PowerPPU(void)
1466 {
1467         memset(NTARAM,0x00,0x800);
1468         memset(PALRAM,0x00,0x20);
1469         memset(SPRAM,0x00,0x100);
1470         ResetPPU();
1471 }
1472
1473 void ResetNES(void)
1474 {
1475         if(!GameLoaded) return;
1476         GameInterface(GI_RESETM2, 0);
1477         ResetSound();
1478         ResetPPU();
1479         X6502_Reset();
1480 }
1481
1482 static void FCEU_MemoryRand(uint8 *ptr, uint32 size)
1483 {
1484  int x=0;
1485  while(size)
1486  {
1487   *ptr=(x&4)?0xFF:0x00;
1488   x++;
1489   size--;
1490   ptr++;
1491  }
1492 }
1493
1494 void PowerNES(void)
1495 {
1496         if(!GameLoaded) return;
1497
1498         FCEU_CheatResetRAM();
1499         FCEU_CheatAddRAM(2,0,RAM);
1500
1501         GeniePower();
1502
1503 #ifndef DEBUG_ASM_6502
1504         FCEU_MemoryRand(RAM,0x800);
1505 #else
1506         memset(RAM,0x00,0x800);
1507 #endif
1508         ResetMapping();
1509         GameInterface(GI_POWER, 0);
1510         PowerSound();
1511         PowerPPU();
1512         timestampbase=0;
1513 #ifdef ASM_6502
1514         if (geniestage)
1515          GenieSetPages(0);
1516 #endif
1517         X6502_Power();
1518 }
1519
1520
1521 /* savestate stuff */
1522 uint16 TempAddrT,RefreshAddrT;
1523
1524 SFORMAT FCEUPPU_STATEINFO[]={
1525  { NTARAM, 0x800, "NTAR"},
1526  { PALRAM, 0x20, "PRAM"},
1527  { SPRAM, 0x100, "SPRA"},
1528  { PPU, 0x4, "PPUR"},
1529  { &XOffset, 1, "XOFF"},
1530  { &vtoggle, 1, "VTOG"},
1531  { &RefreshAddrT, 2|RLSB, "RADD"},
1532  { &TempAddrT, 2|RLSB, "TADD"},
1533  { &VRAMBuffer, 1, "VBUF"},
1534  { &PPUGenLatch, 1, "PGEN"},
1535  // from 0.98.15
1536  { &kook, 1, "KOOK"},
1537  { &ppudead, 1, "DEAD"},
1538  { &PPUSPL, 1, "PSPL"},
1539  { 0 }
1540  };
1541
1542