1 /* FCE Ultra - NES/Famicom Emulator
3 * Copyright notice for this file:
4 * Copyright (C) 1998 BERO
5 * Copyright (C) 2002 Ben Parnell
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.
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.
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
54 static void (*RefreshLine)(uint8 *P, uint32 vofs) = NULL;
55 static void PRefreshLine(void);
57 static void ResetPPU(void);
58 static void PowerPPU(void);
60 uint64 timestampbase=0;
63 uint32 MMC5HackVROMMask;
64 uint8 *MMC5HackExNTARAMPtr;
65 uint8 *MMC5HackVROMPTR;
66 uint8 MMC5HackCHRMode=0;
68 uint8 MMC5HackSPScroll;
71 uint8 *MMC5SPRVPage[8];
72 uint8 *MMC5BGVPage[8];
75 uint8 VRAMBuffer,PPUGenLatch;
81 /* Color deemphasis emulation. Joy... */
83 static int deempcnt[8];
88 void (*GameInterface)(int h);
90 void FP_FASTAPASS(1) (*PPU_hook)(uint32 A);
92 void (*GameStateRestore)(int version);
93 void (*GameHBIRQHook)(void);
95 readfunc ARead[0x10000];
96 writefunc BWrite[0x10000];
97 static readfunc *AReadG;
98 static writefunc *BWriteG;
111 int AllocGenieRW(void)
113 if(!(AReadG=FCEU_malloc(0x8000*sizeof(readfunc))))
115 if(!(BWriteG=FCEU_malloc(0x8000*sizeof(writefunc))))
121 void FlushGenieRW(void)
127 for(x=0;x<0x8000;x++)
129 ARead[x+0x8000]=AReadG[x];
130 BWrite[x+0x8000]=BWriteG[x];
140 readfunc FASTAPASS(1) GetReadHandler(int32 a)
142 if(a>=0x8000 && RWWrap)
143 return AReadG[a-0x8000];
148 void FASTAPASS(3) SetReadHandler(int32 start, int32 end, readfunc func)
156 for(x=end;x>=start;x--)
159 AReadG[x-0x8000]=func;
165 for(x=end;x>=start;x--)
169 writefunc FASTAPASS(1) GetWriteHandler(int32 a)
171 if(RWWrap && a>=0x8000)
172 return BWriteG[a-0x8000];
177 void FASTAPASS(3) SetWriteHandler(int32 start, int32 end, writefunc func)
185 for(x=end;x>=start;x--)
188 BWriteG[x-0x8000]=func;
193 for(x=end;x>=start;x--)
200 uint32 TempAddr,RefreshAddr;
203 /* scanline is equal to the current visible scanline we're on. */
206 static uint32 scanlines_per_frame;
211 uint8 GameMemBlock[131072];
212 uint8 NTARAM[0x800],PALRAM[0x20];
218 #define MMC5BGVRAMADR(V) &MMC5BGVPage[(V)>>10][(V)]
219 #define VRAMADR(V) &VPage[(V)>>10][(V)]
248 return ret|(PPUGenLatch&0x1F);
259 uint32 tmp=RefreshAddr&0x3FFF;
261 PPUGenLatch=ret=VRAMBuffer;
262 if(PPU_hook) PPU_hook(tmp);
265 VRAMBuffer=VPage[tmp>>10][tmp];
269 VRAMBuffer=vnapage[(tmp>>10)&0x3][tmp&0x3FF];
272 if (INC32) RefreshAddr+=32;
274 if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
292 //printf("$%04x:$%02x, %d\n",X.PC,V,scanline);
318 //printf("$%02x:$%02x\n",PPUSPL,V);
354 TempAddr|=(V&0x3f)<<8;
360 RefreshAddr=TempAddr;
363 PPU_hook(RefreshAddr);
370 uint32 tmp=RefreshAddr&0x3FFF;
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;
383 if(PPUCHRRAM&(1<<(tmp>>10)))
384 VPage[tmp>>10][tmp]=V;
388 if(PPUNTARAM&(1<<((tmp&0xF00)>>10)))
389 vnapage[((tmp&0xF00)>>10)][tmp&0x3FF]=V;
391 if (INC32) RefreshAddr+=32;
393 if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
401 B2004(0x2004,X.DB=ARead[t+x](t+x));
402 X6502_AddCycles(512);
405 void BGRender(uint8 *target)
408 vofs=((PPU[0]&0x10)<<8) | ((RefreshAddr>>12)&7);
414 RefreshLine(target-XOffset, vofs);
422 tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
424 *(uint32 *)target=*(uint32 *)(target+4)=tem;
429 int FSkip_setting=-1; // auto
431 void FCEUI_FrameSkip(int x)
437 /* This is called at the beginning of each visible scanline */
438 static void Loop6502(void)
442 uint8 *target=XBuf+(scanline<<8)+(scanline<<4)+8;
444 if(ScreenON || SpriteON)
446 /* PRefreshLine() will not get called on skipped frames. This
447 could cause a problem, but the solution would be rather complex,
448 due to the current sprite 0 hit code.
456 if(scanline>=FSettings.FirstSLine && scanline<=FSettings.LastSLine)
466 tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
468 FCEU_dwmemset(target,tem,264);
473 if (SpriteON && scanline)
474 RefreshSprite(target);
482 *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])&0xF0F0F0F0;
486 *(uint32 *)&target[x<<2]=((*(uint32*)&target[x<<2])&0x3f3f3f3f)|0x40404040;
489 *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])|0xC0C0C0C0;
492 *(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])&0x3f3f3f3f;
500 tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
501 FCEU_dwmemset(target,tem,256);
503 if(InputScanlineHook)
504 InputScanlineHook(target, scanline);
507 #define PAL(c) ((c)+cc)
510 static void PRefreshLine(void)
516 if (BGAdrHI) vofs = 0x1000;
518 vofs+=(RefreshAddr>>12)&7;
524 zz2=(uint8)((RefreshAddr>>10)&3);
525 PPU_hook(0x2000|(RefreshAddr&0xFFF));
526 no = vnapage[zz2][(RefreshAddr&0x3ff)];
527 PPU_hook((no<<4)+vofs);
528 if((RefreshAddr&0x1f)==0x1f)
535 /* This high-level graphics MMC5 emulation code was written
536 for MMC5 carts in "CL" mode. It's probably not totally
537 correct for carts in "SL" mode.
539 static void RefreshLine_MMC5Hack1(uint8 *P, uint32 vofs)
543 tochange=MMC5HackSPMode&0x1F;
545 for(X1=33;X1;X1--,P+=8)
551 if((tochange<=0 && MMC5HackSPMode&0x40) ||
552 (tochange>0 && !(MMC5HackSPMode&0x40)))
557 ys=((scanline>>3)+MMC5HackSPScroll)&0x1F;
558 if(ys>=0x1E) ys-=0x1E;
559 vadr=(MMC5HackExNTARAMPtr[xs|(ys<<5)]<<4)+(vofs&7);
561 C = MMC5HackVROMPTR+vadr;
562 C += ((MMC5HackSPPage & 0x3f & MMC5HackVROMMask) << 12);
564 cc=MMC5HackExNTARAMPtr[0x3c0+(xs>>2)+((ys&0x1C)<<1)];
565 cc=((cc >> ((xs&2) + ((ys&0x2)<<1))) &3) <<2;
570 zz2=(RefreshAddr>>10)&3;
571 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
572 C = MMC5BGVRAMADR(vadr);
573 cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
574 cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
578 if((RefreshAddr&0x1f)==0x1f)
586 static void RefreshLine_MMC5Hack2(uint8 *P, uint32 vofs)
590 tochange=MMC5HackSPMode&0x1F;
592 for(X1=33;X1;X1--,P+=8)
599 if((tochange<=0 && MMC5HackSPMode&0x40) ||
600 (tochange>0 && !(MMC5HackSPMode&0x40)))
605 ys=((scanline>>3)+MMC5HackSPScroll)&0x1F;
606 if(ys>=0x1E) ys-=0x1E;
607 vadr=(MMC5HackExNTARAMPtr[xs|(ys<<5)]<<4)+(vofs&7);
609 C = MMC5HackVROMPTR+vadr;
610 C += ((MMC5HackSPPage & 0x3f & MMC5HackVROMMask) << 12);
612 cc=MMC5HackExNTARAMPtr[0x3c0+(xs>>2)+((ys&0x1C)<<1)];
613 cc=((cc >> ((xs&2) + ((ys&0x2)<<1))) &3) <<2;
618 zz2=(RefreshAddr>>10)&3;
619 vadr = (vnapage[zz2][RefreshAddr & 0x3ff] << 4) + vofs;
620 C += (((MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff]) & 0x3f &
621 MMC5HackVROMMask) << 12) + (vadr & 0xfff);
622 vadr = (MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff] & 0xC0)>> 4;
626 if((RefreshAddr&0x1f)==0x1f)
634 static void RefreshLine_MMC5Hack3(uint8 *P, uint32 vofs)
638 for(X1=33;X1;X1--,P+=8)
646 zz2=(RefreshAddr>>10)&3;
647 vadr = (vnapage[zz2][RefreshAddr & 0x3ff] << 4) + vofs;
648 C += (((MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff]) & 0x3f &
649 MMC5HackVROMMask) << 12) + (vadr & 0xfff);
650 vadr = (MMC5HackExNTARAMPtr[RefreshAddr & 0x3ff] & 0xC0)>> 4;
654 if((RefreshAddr&0x1f)==0x1f)
661 static void RefreshLine_MMC5Hack4(uint8 *P, uint32 vofs)
665 for(X1=33;X1;X1--,P+=8)
672 zz2=(RefreshAddr>>10)&3;
673 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
674 C = MMC5BGVRAMADR(vadr);
675 cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
676 cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
680 if((RefreshAddr&0x1f)==0x1f)
687 static void RefreshLine_PPU_hook(uint8 *P, uint32 vofs)
691 for(X1=33;X1;X1--,P+=8)
698 zz2=(RefreshAddr>>10)&3;
699 PPU_hook(0x2000|(RefreshAddr&0xFFF));
700 cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
701 cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
702 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
709 if((RefreshAddr&0x1f)==0x1f)
716 static void RefreshLine_normal(uint8 *P, uint32 vofs)
720 for(X1=33;X1;X1--,P+=8)
727 zz2=(RefreshAddr>>10)&3;
728 vadr=(vnapage[zz2][RefreshAddr&0x3ff]<<4)+vofs;
730 cc=vnapage[zz2][0x3c0+(zz>>2)+((RefreshAddr&0x380)>>4)];
731 cc=((cc >> ((zz&2) + ((RefreshAddr&0x40)>>4))) &3) <<2;
736 c1=((C[0]>>1)&0x55)|(C[8]&0xAA);
737 c2=(C[0]&0x55)|((C[8]<<1)&0xAA);
750 if((RefreshAddr&0x1f)==0x1f)
757 static void SetRefreshLine(void)
759 if(MMC5Hack && geniestage!=1)
761 if(MMC5HackCHRMode==0 && (MMC5HackSPMode&0x80))
763 if (RefreshLine != RefreshLine_MMC5Hack1) printf("set refr RefreshLine_MMC5Hack1\n");
764 RefreshLine = RefreshLine_MMC5Hack1;
766 else if(MMC5HackCHRMode==1 && (MMC5HackSPMode&0x80))
768 if (RefreshLine != RefreshLine_MMC5Hack2) printf("set refr RefreshLine_MMC5Hack2\n");
769 RefreshLine = RefreshLine_MMC5Hack2;
771 else if(MMC5HackCHRMode==1)
773 if (RefreshLine != RefreshLine_MMC5Hack3) printf("set refr RefreshLine_MMC5Hack3\n");
774 RefreshLine = RefreshLine_MMC5Hack3;
778 if (RefreshLine != RefreshLine_MMC5Hack4) printf("set refr RefreshLine_MMC5Hack4\n");
779 RefreshLine = RefreshLine_MMC5Hack4;
781 } // End if(MMC5Hack)
784 if (RefreshLine != RefreshLine_PPU_hook) printf("set refr RefreshLine_PPU_hook\n");
785 RefreshLine = RefreshLine_PPU_hook;
789 if (RefreshLine != RefreshLine_normal) printf("set refr RefreshLine_normal\n");
790 RefreshLine = RefreshLine_normal;
794 static INLINE void Fixit2(void)
796 if(ScreenON || SpriteON)
798 uint32 rad=RefreshAddr;
800 rad|=TempAddr&0x041f;
802 //PPU_hook(RefreshAddr,-1);
806 static INLINE void Fixit1(void)
808 if(ScreenON || SpriteON)
810 uint32 rad=RefreshAddr;
812 if((rad&0x7000)==0x7000)
815 if((rad&0x3E0)==0x3A0)
822 if((rad&0x3E0)==0x3e0)
830 //PPU_hook(RefreshAddr,-1);
834 /* This is called at the beginning of all h-blanks on visible lines. */
835 static void DoHBlank(void)
837 if(ScreenON || SpriteON)
839 if(GameHBIRQHook && (ScreenON || SpriteON))
849 X6502_Run(25); // Tried 65, caused problems with Slalom(maybe others)
854 //fprintf(stderr,"%3d: $%04x\n",scanline,RefreshAddr);
873 // ============================//
875 // ===========================//
877 void ResetMapping(void)
881 SetReadHandler(0x0000,0xFFFF,ANull);
882 SetWriteHandler(0x0000,0xFFFF,BNull);
884 SetReadHandler(0,0x7FF,ARAML);
885 SetWriteHandler(0,0x7FF,BRAML);
887 SetReadHandler(0x800,0x1FFF,ARAMH); /* Part of a little */
888 SetWriteHandler(0x800,0x1FFF,BRAMH); /* hack for a small speed boost. */
890 for(x=0x2000;x<0x4000;x+=8)
910 BWrite[0x4014]=B4014;
920 if(FCEUGameInfo.type!=GIT_NSF)
923 if(FSettings.NetworkPlay) KillNetplay();
925 GameInterface(GI_CLOSE);
931 void ResetGameLoaded(void)
933 if(GameLoaded) CloseGame();
938 GameExpSound.RChange=0;
939 if(GameExpSound.Kill)
948 FCEUGameInfo.type=GIT_CART;
949 FCEUGameInfo.vidsys=GIV_USER;
950 FCEUGameInfo.input[0]=FCEUGameInfo.input[1]=-1;
951 FCEUGameInfo.inputfc=-1;
954 FCEUGI *FCEUI_LoadGame(char *name)
961 fp=FCEU_fopen(name,"rb");
964 FCEU_PrintError("Error opening \"%s\"!",name);
969 if(iNESLoad(name,fp))
975 if(UNIFLoad(name,fp))
978 FCEU_PrintError("An error occurred while loading the file.");
987 if(FCEUGameInfo.type!=GIT_NSF)
988 if(FSettings.GameGenie)
993 if(FSettings.NetworkPlay) InitNetplay();
996 if(FCEUGameInfo.type!=GIT_NSF)
1002 FCEU_ResetPalette();
1004 return(&FCEUGameInfo);
1008 void FCEU_ResetVidSys(void)
1012 if(FCEUGameInfo.vidsys==GIV_NTSC)
1014 else if(FCEUGameInfo.vidsys==GIV_PAL)
1022 scanlines_per_frame=312;
1023 FSettings.FirstSLine=FSettings.UsrFirstSLine[1];
1024 FSettings.LastSLine=FSettings.UsrLastSLine[1];
1029 scanlines_per_frame=262;
1030 FSettings.FirstSLine=FSettings.UsrFirstSLine[0];
1031 FSettings.LastSLine=FSettings.UsrLastSLine[0];
1033 printf("PAL = %i\n", PAL);
1034 SetSoundVariables();
1037 int FCEUI_Initialize(void)
1039 if(!InitVirtualVideo())
1041 memset(&FSettings,0,sizeof(FSettings));
1042 FSettings.UsrFirstSLine[0]=8;
1043 FSettings.UsrFirstSLine[1]=0;
1044 FSettings.UsrLastSLine[0]=FSettings.UsrLastSLine[1]=239;
1045 FSettings.SoundVolume=65535; // 100%
1049 #define harko 0xe //0x9
1050 static INLINE void Thingo(void)
1056 X6502_Run(256-harko);
1064 X6502_Run(tosprite);
1066 X6502_Run(256-tosprite-harko);
1072 X6502_Run(256-harko);
1074 X6502_Run(tosprite-(256-harko));
1076 X6502_Run(256-tosprite);
1088 ApplyPeriodicCheats();
1092 PPU[3]=PPUSPL=0; /* Not sure if this is correct. According
1093 to Matt Conte and my own tests, it is. Timing is probably
1094 off, though. NOTE: Not having this here
1095 breaks a Super Donkey Kong game. */
1097 X6502_Run(12); /* I need to figure out the true nature and length
1100 if(FCEUGameInfo.type==GIT_NSF)
1105 X6502_Run((scanlines_per_frame-242)*(256+85)-12);
1112 if(ScreenON || SpriteON)
1120 if(ScreenON || SpriteON)
1122 RefreshAddr=TempAddr;
1123 if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
1125 if(FCEUGameInfo.type==GIT_NSF)
1126 X6502_Run((256+85)*240);
1133 for(scanline=0;scanline<240;scanline++)
1138 for(x=1,max=0,maxref=0;x<7;x++)
1147 //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);
1148 //memset(deempcnt,0,sizeof(deempcnt));
1149 SetNESDeemph(maxref,0);
1155 ssize=FlushEmulateSound();
1160 FCEU_PutImageDummy();
1162 FCEUD_Update(0,WaveFinalMono,ssize);
1168 FCEUD_Update(XBuf+8,WaveFinalMono,ssize);
1183 #include <sys/time.h>
1186 void FCEUI_Emulate(void)
1189 uint64 starttime,end;
1192 gettimeofday(&tv,0);
1193 starttime=((uint64)tv.tv_sec*1000000)+tv.tv_usec;
1198 // Probably won't work well on Windows port; for
1199 // debugging/speed testing.
1203 gettimeofday(&tv,0);
1204 end=((uint64)tv.tv_sec*1000000)+tv.tv_usec;
1205 w=frcount*10000000000LL/(end-starttime);
1208 printf("Average FPS: %d.%04d\n",i,frac);
1214 void FCEUI_CloseGame(void)
1219 static void ResetPPU(void)
1221 VRAMBuffer=PPU[0]=PPU[1]=PPU[2]=PPU[3]=0;
1224 RefreshAddr=TempAddr=0;
1228 static void PowerPPU(void)
1230 memset(NTARAM,0x00,0x800);
1231 memset(PALRAM,0x00,0x20);
1232 memset(SPRAM,0x00,0x100);
1238 if(!GameLoaded || (FCEUGameInfo.type==GIT_NSF)) return;
1239 GameInterface(GI_RESETM2);
1247 if(!GameLoaded) return;
1249 FCEU_CheatResetRAM();
1250 FCEU_CheatAddRAM(2,0,RAM);
1254 memset(RAM,0x00,0x800);
1256 GameInterface(GI_POWER);