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fceux/ppu.cpp

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/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 1998 BERO
* Copyright (C) 2003 Xodnizel
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "types.h"
#include "x6502.h"
#include "fceu.h"
#include "ppu.h"
#include "nsf.h"
#include "sound.h"
#include "general.h"
#include "endian.h"
#include "memory.h"
#include "cart.h"
#include "palette.h"
#include "state.h"
#include "video.h"
#include "input.h"
#define VBlankON (PPU[0]&0x80) /* Generate VBlank NMI */
#define Sprite16 (PPU[0]&0x20) /* Sprites 8x16/8x8 */
#define BGAdrHI (PPU[0]&0x10) /* BG pattern adr $0000/$1000 */
#define SpAdrHI (PPU[0]&0x08) /* Sprite pattern adr $0000/$1000 */
#define INC32 (PPU[0]&0x04) /* auto increment 1/32 */
#define SpriteON (PPU[1]&0x10) /* Show Sprite */
#define ScreenON (PPU[1]&0x08) /* Show screen */
#define PPU_status (PPU[2])
#define Pal (PALRAM)
static void FetchSpriteData(void);
static void FASTAPASS(1) RefreshLine(int lastpixel);
static void RefreshSprites(void);
static void CopySprites(uint8 *target);
static void Fixit1(void);
static uint32 ppulut1[256];
static uint32 ppulut2[256];
static uint32 ppulut3[128];
static void makeppulut(void)
{
int x;
int y;
for(x=0;x<256;x++)
{
ppulut1[x]=0;
for(y=0;y<8;y++)
ppulut1[x]|=((x>>(7-y))&1)<<(y*4);
ppulut2[x]=ppulut1[x]<<1;
}
{
int cc,xo,pixel;
for(cc=0;cc<16;cc++)
{
for(xo=0;xo<8;xo++)
{
ppulut3[xo|(cc<<3)]=0;
for(pixel=0;pixel<8;pixel++)
{
int shiftr;
shiftr=(pixel+xo)/8;
shiftr*=2;
ppulut3[xo|(cc<<3)]|=(( cc>>shiftr )&3)<<(2+pixel*4);
}
// printf("%08x\n",ppulut3[xo|(cc<<3)]);
}
}
}
}
static int ppudead=1;
static int kook=0;
int fceuindbg=0;
int MMC5Hack=0;
uint32 MMC5HackVROMMask=0;
uint8 *MMC5HackExNTARAMPtr=0;
uint8 *MMC5HackVROMPTR=0;
uint8 MMC5HackCHRMode=0;
uint8 MMC5HackSPMode=0;
uint8 MMC5HackSPScroll=0;
uint8 MMC5HackSPPage=0;
uint8 VRAMBuffer=0,PPUGenLatch=0;
uint8 *vnapage[4];
uint8 PPUNTARAM=0;
uint8 PPUCHRRAM=0;
/* Color deemphasis emulation. Joy... */
static uint8 deemp=0;
static int deempcnt[8];
void (*GameHBIRQHook)(void), (*GameHBIRQHook2)(void);
void FP_FASTAPASS(1) (*PPU_hook)(uint32 A);
uint8 vtoggle=0;
uint8 XOffset=0;
uint32 TempAddr=0,RefreshAddr=0;
static int maxsprites=8;
/* scanline is equal to the current visible scanline we're on. */
int scanline;
static uint32 scanlines_per_frame;
uint8 PPU[4];
uint8 PPUSPL;
uint8 NTARAM[0x800],PALRAM[0x20],SPRAM[0x100],SPRBUF[0x100];
#define MMC5SPRVRAMADR(V) &MMC5SPRVPage[(V)>>10][(V)]
#define MMC5BGVRAMADR(V) &MMC5BGVPage[(V)>>10][(V)]
#define VRAMADR(V) &VPage[(V)>>10][(V)]
static DECLFR(A2002)
{
uint8 ret;
FCEUPPU_LineUpdate();
ret = PPU_status;
ret|=PPUGenLatch&0x1F;
#ifdef FCEUDEF_DEBUGGER
if(!fceuindbg)
#endif
{
vtoggle=0;
PPU_status&=0x7F;
PPUGenLatch=ret;
}
return ret;
}
static DECLFR(A200x) /* Not correct for $2004 reads. */
{
FCEUPPU_LineUpdate();
return PPUGenLatch;
}
/*
static DECLFR(A2004)
{
uint8 ret;
FCEUPPU_LineUpdate();
ret = SPRAM[PPU[3]];
if(PPUSPL>=8)
{
if(PPU[3]>=8)
ret = SPRAM[PPU[3]];
}
else
{
//printf("$%02x:$%02x\n",PPUSPL,V);
ret = SPRAM[PPUSPL];
}
PPU[3]++;
PPUSPL++;
PPUGenLatch = ret;
printf("%d, %02x\n",scanline,ret);
return(ret);
}
*/
static DECLFR(A2007)
{
uint8 ret;
uint32 tmp=RefreshAddr&0x3FFF;
FCEUPPU_LineUpdate();
ret=VRAMBuffer;
#ifdef FCEUDEF_DEBUGGER
if(!fceuindbg)
#endif
{
if(PPU_hook) PPU_hook(tmp);
PPUGenLatch=VRAMBuffer;
if(tmp<0x2000)
{
VRAMBuffer=VPage[tmp>>10][tmp];
}
else
{
VRAMBuffer=vnapage[(tmp>>10)&0x3][tmp&0x3FF];
}
}
#ifdef FCEUDEF_DEBUGGER
if(!fceuindbg)
#endif
{
if(INC32) RefreshAddr+=32;
else RefreshAddr++;
if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
}
return ret;
}
static DECLFW(B2000)
{
// FCEU_printf("%04x:%02x, (%d) %02x, %02x\n",A,V,scanline,PPU[0],PPU_status);
FCEUPPU_LineUpdate();
PPUGenLatch=V;
if(!(PPU[0]&0x80) && (V&0x80) && (PPU_status&0x80))
{
// FCEU_printf("Trigger NMI, %d, %d\n",timestamp,ppudead);
TriggerNMI2();
}
PPU[0]=V;
TempAddr&=0xF3FF;
TempAddr|=(V&3)<<10;
}
static DECLFW(B2001)
{
//printf("%04x:$%02x, %d\n",A,V,scanline);
FCEUPPU_LineUpdate();
PPUGenLatch=V;
PPU[1]=V;
if(V&0xE0)
deemp=V>>5;
}
static DECLFW(B2002)
{
PPUGenLatch=V;
}
static DECLFW(B2003)
{
//printf("$%04x:$%02x, %d, %d\n",A,V,timestamp,scanline);
PPUGenLatch=V;
PPU[3]=V;
PPUSPL=V&0x7;
}
static DECLFW(B2004)
{
//printf("Wr: %04x:$%02x\n",A,V);
PPUGenLatch=V;
if(PPUSPL>=8)
{
if(PPU[3]>=8)
SPRAM[PPU[3]]=V;
}
else
{
//printf("$%02x:$%02x\n",PPUSPL,V);
SPRAM[PPUSPL]=V;
}
PPU[3]++;
PPUSPL++;
}
static DECLFW(B2005)
{
uint32 tmp=TempAddr;
FCEUPPU_LineUpdate();
PPUGenLatch=V;
if(!vtoggle)
{
tmp&=0xFFE0;
tmp|=V>>3;
XOffset=V&7;
}
else
{
tmp&=0x8C1F;
tmp|=((V&~0x7)<<2);
tmp|=(V&7)<<12;
}
TempAddr=tmp;
vtoggle^=1;
}
static DECLFW(B2006)
{
FCEUPPU_LineUpdate();
PPUGenLatch=V;
if(!vtoggle)
{
TempAddr&=0x00FF;
TempAddr|=(V&0x3f)<<8;
}
else
{
TempAddr&=0xFF00;
TempAddr|=V;
RefreshAddr=TempAddr;
if(PPU_hook)
PPU_hook(RefreshAddr);
//printf("%d, %04x\n",scanline,RefreshAddr);
}
vtoggle^=1;
}
static DECLFW(B2007)
{
uint32 tmp=RefreshAddr&0x3FFF;
PPUGenLatch=V;
if(tmp>=0x3F00)
{
// hmmm....
if(!(tmp&0xf))
PALRAM[0x00]=PALRAM[0x04]=PALRAM[0x08]=PALRAM[0x0C]=V&0x3F;
else if(tmp&3) PALRAM[(tmp&0x1f)]=V&0x3f;
}
else if(tmp<0x2000)
{
if(PPUCHRRAM&(1<<(tmp>>10)))
VPage[tmp>>10][tmp]=V;
}
else
{
if(PPUNTARAM&(1<<((tmp&0xF00)>>10)))
vnapage[((tmp&0xF00)>>10)][tmp&0x3FF]=V;
}
// FCEU_printf("ppu (%04x) %04x:%04x %d, %d\n",X.PC,RefreshAddr,PPUGenLatch,scanline,timestamp);
if(INC32) RefreshAddr+=32;
else RefreshAddr++;
if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
}
static DECLFW(B4014)
{
uint32 t=V<<8;
int x;
for(x=0;x<256;x++)
X6502_DMW(0x2004,X6502_DMR(t+x));
}
#define PAL(c) ((c)+cc)
#define GETLASTPIXEL (PAL?((timestamp*48-linestartts)/15) : ((timestamp*48-linestartts)>>4) )
static uint8 *Pline,*Plinef;
static int firsttile;
static int linestartts;
static int tofix=0;
static void ResetRL(uint8 *target)
{
memset(target,0xFF,256);
if(InputScanlineHook)
InputScanlineHook(0,0,0,0);
Plinef=target;
Pline=target;
firsttile=0;
linestartts=timestamp*48+X.count;
tofix=0;
FCEUPPU_LineUpdate();
tofix=1;
}
static uint8 sprlinebuf[256+8];
void FCEUPPU_LineUpdate(void)
{
#ifdef FCEUDEF_DEBUGGER
if(!fceuindbg)
#endif
if(Pline)
{
int l=GETLASTPIXEL;
RefreshLine(l);
}
}
static int tileview=0;
static int rendis = 0;
void FCEUI_ToggleTileView(void)
{
tileview^=1;
}
void FCEUI_SetRenderDisable(int sprites, int bg)
{
//printf("%d, %d\n",sprites,bg);
if(sprites >= 0)
{
if(sprites == 2) rendis ^= 1;
else rendis = (rendis &~1) | sprites?1:0;
}
if(bg >= 0)
{
if(bg == 2) rendis ^= 2;
else rendis = (rendis &~2) | bg?2:0;
}
}
/*
static void TileView(void)
{
uint8 *P=XBuf+16*256;
int bgh;
int y;
int X1;
for(bgh=0;bgh<2;bgh++)
for(y=0;y<16*8;y++)
for(P=XBuf+bgh*128+(16+y)*256,X1=16;X1;X1--,P+=8)
{
uint8 *C;
register uint8 cc;
uint32 vadr;
vadr=((((16-X1)|((y>>3)<<4))<<4)|(y&7))+bgh*0x1000;
//C= ROM+vadr+turt*8192;
C = VRAMADR(vadr);
//if((vadr+turt*8192)>=524288)
//printf("%d ",vadr+turt*8192);
cc=0;
//#include "pputile.h"
}
}
*/
static void CheckSpriteHit(int p);
static void EndRL(void)
{
RefreshLine(272);
if(tofix)
Fixit1();
CheckSpriteHit(272);
Pline=0;
}
static int32 sphitx;
static uint8 sphitdata;
static void CheckSpriteHit(int p)
{
int l=p-16;
int x;
if(sphitx==0x100) return;
for(x=sphitx;x<(sphitx+8) && x<l;x++)
{
if((sphitdata&(0x80>>(x-sphitx))) && !(Plinef[x]&64))
{
PPU_status|=0x40;
//printf("Ha: %d, %d, Hita: %d, %d, %d, %d, %d\n",p,p&~7,scanline,GETLASTPIXEL-16,&Plinef[x],Pline,Pline-Plinef);
//printf("%d\n",GETLASTPIXEL-16);
//if(Plinef[x] == 0xFF)
//printf("PL: %d, %02x\n",scanline, Plinef[x]);
sphitx=0x100;
break;
}
}
}
static int spork=0; /* spork the world. Any sprites on this line?
Then this will be set to 1. Needed for zapper
emulation and *gasp* sprite emulation.
*/
// lasttile is really "second to last tile."
static void FASTAPASS(1) RefreshLine(int lastpixel)
{
static uint32 pshift[2];
static uint32 atlatch;
uint32 smorkus=RefreshAddr;
#define RefreshAddr smorkus
uint32 vofs;
int X1;
register uint8 *P=Pline;
int lasttile=lastpixel>>3;
int numtiles;
static int norecurse=0; /* Yeah, recursion would be bad.
PPU_hook() functions can call
mirroring/chr bank switching functions,
which call FCEUPPU_LineUpdate, which call this
function. */
if(norecurse) return;
if(sphitx != 0x100 && !(PPU_status&0x40))
{
if((sphitx < (lastpixel-16)) && !(sphitx < ((lasttile - 2)*8)))
{
//printf("OK: %d\n",scanline);
lasttile++;
}
}
if(lasttile>34) lasttile=34;
numtiles=lasttile-firsttile;
if(numtiles<=0) return;
P=Pline;
vofs=0;
vofs=((PPU[0]&0x10)<<8) | ((RefreshAddr>>12)&7);
if(!ScreenON && !SpriteON)
{
uint32 tem;
tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
tem|=0x40404040;
FCEU_dwmemset(Pline,tem,numtiles*8);
P+=numtiles*8;
Pline=P;
firsttile=lasttile;
#define TOFIXNUM (272-0x4)
if(lastpixel>=TOFIXNUM && tofix)
{
Fixit1();
tofix=0;
}
if(InputScanlineHook && (lastpixel-16)>=0)
{
InputScanlineHook(Plinef,spork?sprlinebuf:0,linestartts,lasttile*8-16);
}
return;
}
/* Priority bits, needed for sprite emulation. */
Pal[0]|=64;
Pal[4]|=64;
Pal[8]|=64;
Pal[0xC]|=64;
/* This high-level graphics MMC5 emulation code was written
for MMC5 carts in "CL" mode. It's probably not totally
correct for carts in "SL" mode.
*/
#define PPUT_MMC5
if(MMC5Hack && geniestage!=1)
{
if(MMC5HackCHRMode==0 && (MMC5HackSPMode&0x80))
{
int tochange=MMC5HackSPMode&0x1F;
tochange-=firsttile;
for(X1=firsttile;X1<lasttile;X1++)
{
if((tochange<=0 && MMC5HackSPMode&0x40) || (tochange>0 && !(MMC5HackSPMode&0x40)))
{
#define PPUT_MMC5SP
#include "pputile.h"
#undef PPUT_MMC5SP
}
else
{
#include "pputile.h"
}
tochange--;
}
}
else if(MMC5HackCHRMode==1 && (MMC5HackSPMode&0x80))
{
int tochange=MMC5HackSPMode&0x1F;
tochange-=firsttile;
#define PPUT_MMC5SP
#define PPUT_MMC5CHR1
for(X1=firsttile;X1<lasttile;X1++)
{
#include "pputile.h"
}
#undef PPUT_MMC5CHR1
#undef PPUT_MMC5SP
}
else if(MMC5HackCHRMode==1)
{
#define PPUT_MMC5CHR1
for(X1=firsttile;X1<lasttile;X1++)
{
#include "pputile.h"
}
#undef PPUT_MMC5CHR1
}
else
{
for(X1=firsttile;X1<lasttile;X1++)
{
#include "pputile.h"
}
}
}
#undef PPUT_MMC5
else if(PPU_hook)
{
norecurse=1;
#define PPUT_HOOK
for(X1=firsttile;X1<lasttile;X1++)
{
#include "pputile.h"
}
#undef PPUT_HOOK
norecurse=0;
}
else
{
for(X1=firsttile;X1<lasttile;X1++)
{
#include "pputile.h"
}
}
#undef vofs
#undef RefreshAddr
/* Reverse changes made before. */
Pal[0]&=63;
Pal[4]&=63;
Pal[8]&=63;
Pal[0xC]&=63;
RefreshAddr=smorkus;
if(firsttile<=2 && 2<lasttile && !(PPU[1]&2))
{
uint32 tem;
tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
tem|=0x40404040;
*(uint32 *)Plinef=*(uint32 *)(Plinef+4)=tem;
}
if(!ScreenON)
{
uint32 tem;
int tstart,tcount;
tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
tem|=0x40404040;
tcount=lasttile-firsttile;
tstart=firsttile-2;
if(tstart<0)
{
tcount+=tstart;
tstart=0;
}
if(tcount>0)
FCEU_dwmemset(Plinef+tstart*8,tem,tcount*8);
}
if(lastpixel>=TOFIXNUM && tofix)
{
//puts("Fixed");
Fixit1();
tofix=0;
}
//CheckSpriteHit(lasttile*8); //lasttile*8); //lastpixel);
CheckSpriteHit(lastpixel); /* This only works right because
of a hack earlier in this function.
*/
if(InputScanlineHook && (lastpixel-16)>=0)
{
InputScanlineHook(Plinef,spork?sprlinebuf:0,linestartts,lasttile*8-16);
}
Pline=P;
firsttile=lasttile;
}
static INLINE void Fixit2(void)
{
if(ScreenON || SpriteON)
{
uint32 rad=RefreshAddr;
rad&=0xFBE0;
rad|=TempAddr&0x041f;
RefreshAddr=rad;
//PPU_hook(RefreshAddr);
//PPU_hook(RefreshAddr,-1);
}
}
static void Fixit1(void)
{
if(ScreenON || SpriteON)
{
uint32 rad=RefreshAddr;
if((rad&0x7000)==0x7000)
{
rad^=0x7000;
if((rad&0x3E0)==0x3A0)
{
rad^=0x3A0;
rad^=0x800;
}
else
{
if((rad&0x3E0)==0x3e0)
rad^=0x3e0;
else rad+=0x20;
}
}
else
rad+=0x1000;
RefreshAddr=rad;
//PPU_hook(RefreshAddr); //,-1);
}
}
void MMC5_hb(int); /* Ugh ugh ugh. */
static void DoLine(void)
{
int x;
uint8 *target=XBuf+(scanline<<8);
if(MMC5Hack && (ScreenON || SpriteON)) MMC5_hb(scanline);
X6502_Run(256);
EndRL();
if(rendis & 2) /* User asked to not display background data. */
{
uint32 tem;
tem=Pal[0]|(Pal[0]<<8)|(Pal[0]<<16)|(Pal[0]<<24);
tem|=0x40404040;
FCEU_dwmemset(target,tem,256);
}
if(SpriteON)
CopySprites(target);
if(ScreenON || SpriteON) // Yes, very el-cheapo.
{
if(PPU[1]&0x01)
{
for(x=63;x>=0;x--)
*(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])&0x30303030;
}
}
if((PPU[1]>>5)==0x7)
{
for(x=63;x>=0;x--)
*(uint32 *)&target[x<<2]=((*(uint32*)&target[x<<2])&0x3f3f3f3f)|0xc0c0c0c0;
}
else if(PPU[1]&0xE0)
for(x=63;x>=0;x--)
*(uint32 *)&target[x<<2]=(*(uint32*)&target[x<<2])|0x40404040;
else
for(x=63;x>=0;x--)
*(uint32 *)&target[x<<2]=((*(uint32*)&target[x<<2])&0x3f3f3f3f)|0x80808080;
sphitx=0x100;
if(ScreenON || SpriteON)
FetchSpriteData();
if(GameHBIRQHook && (ScreenON || SpriteON) && ((PPU[0]&0x38)!=0x18))
{
X6502_Run(6);
Fixit2();
X6502_Run(4);
GameHBIRQHook();
X6502_Run(85-16-10);
}
else
{
X6502_Run(6); // Tried 65, caused problems with Slalom(maybe others)
Fixit2();
X6502_Run(85-6-16);
// A semi-hack for Star Trek: 25th Anniversary
if(GameHBIRQHook && (ScreenON || SpriteON) && ((PPU[0]&0x38)!=0x18))
GameHBIRQHook();
}
DEBUG(FCEUD_UpdateNTView(scanline,0));
if(SpriteON)
RefreshSprites();
if(GameHBIRQHook2 && (ScreenON || SpriteON))
GameHBIRQHook2();
scanline++;
if(scanline<240)
{
ResetRL(XBuf+(scanline<<8));
}
X6502_Run(16);
}
#define V_FLIP 0x80
#define H_FLIP 0x40
#define SP_BACK 0x20
typedef struct {
uint8 y,no,atr,x;
} SPR;
typedef struct {
uint8 ca[2],atr,x;
} SPRB;
void FCEUI_DisableSpriteLimitation(int a)
{
maxsprites=a?64:8;
}
static uint8 numsprites,SpriteBlurp;
static void FetchSpriteData(void)
{
uint8 ns,sb;
SPR *spr;
uint8 H;
int n;
int vofs;
uint8 P0=PPU[0];
spr=(SPR *)SPRAM;
H=8;
ns=sb=0;
vofs=(unsigned int)(P0&0x8&(((P0&0x20)^0x20)>>2))<<9;
H+=(P0&0x20)>>2;
if(!PPU_hook)
for(n=63;n>=0;n--,spr++)
{
if((unsigned int)(scanline-spr->y)>=H) continue;
//printf("%d, %u\n",scanline,(unsigned int)(scanline-spr->y));
if(ns<maxsprites)
{
if(n==63) sb=1;
{
SPRB dst;
uint8 *C;
int t;
unsigned int vadr;
t = (int)scanline-(spr->y);
if(Sprite16)
vadr = ((spr->no&1)<<12) + ((spr->no&0xFE)<<4);
else
vadr = (spr->no<<4)+vofs;
if(spr->atr&V_FLIP)
{
vadr+=7;
vadr-=t;
vadr+=(P0&0x20)>>1;
vadr-=t&8;
}
else
{
vadr+=t;
vadr+=t&8;
}
/* Fix this geniestage hack */
if(MMC5Hack && geniestage!=1) C = MMC5SPRVRAMADR(vadr);
else C = VRAMADR(vadr);
dst.ca[0]=C[0];
dst.ca[1]=C[8];
dst.x=spr->x;
dst.atr=spr->atr;
*(uint32 *)&SPRBUF[ns<<2]=*(uint32 *)&dst;
}
ns++;
}
else
{
PPU_status|=0x20;
break;
}
}
else
for(n=63;n>=0;n--,spr++)
{
if((unsigned int)(scanline-spr->y)>=H) continue;
if(ns<maxsprites)
{
if(n==63) sb=1;
{
SPRB dst;
uint8 *C;
int t;
unsigned int vadr;
t = (int)scanline-(spr->y);
if(Sprite16)
vadr = ((spr->no&1)<<12) + ((spr->no&0xFE)<<4);
else
vadr = (spr->no<<4)+vofs;
if(spr->atr&V_FLIP)
{
vadr+=7;
vadr-=t;
vadr+=(P0&0x20)>>1;
vadr-=t&8;
}
else
{
vadr+=t;
vadr+=t&8;
}
if(MMC5Hack) C = MMC5SPRVRAMADR(vadr);
else C = VRAMADR(vadr);
dst.ca[0]=C[0];
if(ns<8)
{
PPU_hook(0x2000);
PPU_hook(vadr);
}
dst.ca[1]=C[8];
dst.x=spr->x;
dst.atr=spr->atr;
*(uint32 *)&SPRBUF[ns<<2]=*(uint32 *)&dst;
}
ns++;
}
else
{
PPU_status|=0x20;
break;
}
}
//if(ns>=7)
//printf("%d %d\n",scanline,ns);
if(ns>8) PPU_status|=0x20; /* Handle case when >8 sprites per
scanline option is enabled. */
else if(PPU_hook)
{
for(n=0;n<(8-ns);n++)
{
PPU_hook(0x2000);
PPU_hook(vofs);
}
}
numsprites=ns;
SpriteBlurp=sb;
}
static void RefreshSprites(void)
{
int n;
SPRB *spr;
spork=0;
if(!numsprites) return;
FCEU_dwmemset(sprlinebuf,0x80808080,256);
numsprites--;
spr = (SPRB*)SPRBUF+numsprites;
for(n=numsprites;n>=0;n--,spr--)
{
//#ifdef C80x86
//register uint32 pixdata asm ("eax");
//register uint8 J, atr;
//#else
register uint32 pixdata;
register uint8 J,atr;
//#endif
int x=spr->x;
uint8 *C;
uint8 *VB;
pixdata=ppulut1[spr->ca[0]]|ppulut2[spr->ca[1]];
J=spr->ca[0]|spr->ca[1];
atr=spr->atr;
if(J)
{
if(n==0 && SpriteBlurp && !(PPU_status&0x40))
{
sphitx=x;
sphitdata=J;
if(atr&H_FLIP)
sphitdata= ((J<<7)&0x80) |
((J<<5)&0x40) |
((J<<3)&0x20) |
((J<<1)&0x10) |
((J>>1)&0x08) |
((J>>3)&0x04) |
((J>>5)&0x02) |
((J>>7)&0x01);
}
C = sprlinebuf+x;
VB = (PALRAM+0x10)+((atr&3)<<2);
if(atr&SP_BACK)
{
if(atr&H_FLIP)
{
if(J&0x80) C[7]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x40) C[6]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x20) C[5]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x10) C[4]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x08) C[3]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x04) C[2]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x02) C[1]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x01) C[0]=VB[pixdata]|0x40;
} else {
if(J&0x80) C[0]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x40) C[1]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x20) C[2]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x10) C[3]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x08) C[4]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x04) C[5]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x02) C[6]=VB[pixdata&3]|0x40;
pixdata>>=4;
if(J&0x01) C[7]=VB[pixdata]|0x40;
}
} else {
if(atr&H_FLIP)
{
if(J&0x80) C[7]=VB[pixdata&3];
pixdata>>=4;
if(J&0x40) C[6]=VB[pixdata&3];
pixdata>>=4;
if(J&0x20) C[5]=VB[pixdata&3];
pixdata>>=4;
if(J&0x10) C[4]=VB[pixdata&3];
pixdata>>=4;
if(J&0x08) C[3]=VB[pixdata&3];
pixdata>>=4;
if(J&0x04) C[2]=VB[pixdata&3];
pixdata>>=4;
if(J&0x02) C[1]=VB[pixdata&3];
pixdata>>=4;
if(J&0x01) C[0]=VB[pixdata];
}else{
if(J&0x80) C[0]=VB[pixdata&3];
pixdata>>=4;
if(J&0x40) C[1]=VB[pixdata&3];
pixdata>>=4;
if(J&0x20) C[2]=VB[pixdata&3];
pixdata>>=4;
if(J&0x10) C[3]=VB[pixdata&3];
pixdata>>=4;
if(J&0x08) C[4]=VB[pixdata&3];
pixdata>>=4;
if(J&0x04) C[5]=VB[pixdata&3];
pixdata>>=4;
if(J&0x02) C[6]=VB[pixdata&3];
pixdata>>=4;
if(J&0x01) C[7]=VB[pixdata];
}
}
}
}
SpriteBlurp=0;
spork=1;
}
static void CopySprites(uint8 *target)
{
uint8 n=((PPU[1]&4)^4)<<1;
uint8 *P=target;
if(!spork) return;
spork=0;
if(rendis & 1) return; /* User asked to not display sprites. */
loopskie:
{
uint32 t=*(uint32 *)(sprlinebuf+n);
if(t!=0x80808080)
{
#ifdef LSB_FIRST
if(!(t&0x80))
{
if(!(t&0x40) || (P[n]&0x40)) // Normal sprite || behind bg sprite
P[n]=sprlinebuf[n];
}
if(!(t&0x8000))
{
if(!(t&0x4000) || (P[n+1]&0x40)) // Normal sprite || behind bg sprite
P[n+1]=(sprlinebuf+1)[n];
}
if(!(t&0x800000))
{
if(!(t&0x400000) || (P[n+2]&0x40)) // Normal sprite || behind bg sprite
P[n+2]=(sprlinebuf+2)[n];
}
if(!(t&0x80000000))
{
if(!(t&0x40000000) || (P[n+3]&0x40)) // Normal sprite || behind bg sprite
P[n+3]=(sprlinebuf+3)[n];
}
#else
/* TODO: Simplify */
if(!(t&0x80000000))
{
if(!(t&0x40000000)) // Normal sprite
P[n]=sprlinebuf[n];
else if(P[n]&64) // behind bg sprite
P[n]=sprlinebuf[n];
}
if(!(t&0x800000))
{
if(!(t&0x400000)) // Normal sprite
P[n+1]=(sprlinebuf+1)[n];
else if(P[n+1]&64) // behind bg sprite
P[n+1]=(sprlinebuf+1)[n];
}
if(!(t&0x8000))
{
if(!(t&0x4000)) // Normal sprite
P[n+2]=(sprlinebuf+2)[n];
else if(P[n+2]&64) // behind bg sprite
P[n+2]=(sprlinebuf+2)[n];
}
if(!(t&0x80))
{
if(!(t&0x40)) // Normal sprite
P[n+3]=(sprlinebuf+3)[n];
else if(P[n+3]&64) // behind bg sprite
P[n+3]=(sprlinebuf+3)[n];
}
#endif
}
}
n+=4;
if(n) goto loopskie;
}
void FCEUPPU_SetVideoSystem(int w)
{
if(w)
{
scanlines_per_frame=312;
FSettings.FirstSLine=FSettings.UsrFirstSLine[1];
FSettings.LastSLine=FSettings.UsrLastSLine[1];
}
else
{
scanlines_per_frame=262;
FSettings.FirstSLine=FSettings.UsrFirstSLine[0];
FSettings.LastSLine=FSettings.UsrLastSLine[0];
}
}
void FCEUPPU_Init(void)
{
makeppulut();
}
void FCEUPPU_Reset(void)
{
VRAMBuffer=PPU[0]=PPU[1]=PPU_status=PPU[3]=0;
PPUSPL=0;
PPUGenLatch=0;
RefreshAddr=TempAddr=0;
vtoggle = 0;
ppudead = 2;
kook = 0;
// XOffset=0;
}
void FCEUPPU_Power(void)
{
int x;
memset(NTARAM,0x00,0x800);
memset(PALRAM,0x00,0x20);
memset(SPRAM,0x00,0x100);
FCEUPPU_Reset();
for(x=0x2000;x<0x4000;x+=8)
{
ARead[x]=A200x;
BWrite[x]=B2000;
ARead[x+1]=A200x;
BWrite[x+1]=B2001;
ARead[x+2]=A2002;
BWrite[x+2]=B2002;
ARead[x+3]=A200x;
BWrite[x+3]=B2003;
ARead[x+4]=A200x; //A2004;
BWrite[x+4]=B2004;
ARead[x+5]=A200x;
BWrite[x+5]=B2005;
ARead[x+6]=A200x;
BWrite[x+6]=B2006;
ARead[x+7]=A2007;
BWrite[x+7]=B2007;
}
BWrite[0x4014]=B4014;
}
int FCEUPPU_Loop(int skip)
{
if(ppudead) /* Needed for Knight Rider, possibly others. */
{
memset(XBuf, 0x80, 256*240);
X6502_Run(scanlines_per_frame*(256+85));
ppudead--;
}
else
{
X6502_Run(256+85);
PPU_status |= 0x80;
PPU[3]=PPUSPL=0; /* Not sure if this is correct. According
to Matt Conte and my own tests, it is. Timing is probably
off, though. NOTE: Not having this here
breaks a Super Donkey Kong game. */
/* I need to figure out the true nature and length
of this delay.
*/
X6502_Run(12);
if(FCEUGameInfo->type==GIT_NSF)
DoNSFFrame();
else
{
if(VBlankON)
TriggerNMI();
}
X6502_Run((scanlines_per_frame-242)*(256+85)-12); //-12);
PPU_status&=0x1f;
X6502_Run(256);
{
int x;
if(ScreenON || SpriteON)
{
if(GameHBIRQHook && ((PPU[0]&0x38)!=0x18))
GameHBIRQHook();
if(PPU_hook)
for(x=0;x<42;x++) {PPU_hook(0x2000); PPU_hook(0);}
if(GameHBIRQHook2)
GameHBIRQHook2();
}
X6502_Run(85-16);
if(ScreenON || SpriteON)
{
RefreshAddr=TempAddr;
if(PPU_hook) PPU_hook(RefreshAddr&0x3fff);
}
/* Clean this stuff up later. */
spork=numsprites=0;
ResetRL(XBuf);
X6502_Run(16-kook);
kook ^= 1;
}
if(FCEUGameInfo->type==GIT_NSF)
X6502_Run((256+85)*240);
#ifdef FRAMESKIP
else if(skip)
{
int y;
y=SPRAM[0];
y++;
PPU_status|=0x20; // Fixes "Bee 52". Does it break anything?
if(GameHBIRQHook)
{
X6502_Run(256);
for(scanline=0;scanline<240;scanline++)
{
if(ScreenON || SpriteON)
GameHBIRQHook();
if(scanline==y && SpriteON) PPU_status|=0x40;
X6502_Run((scanline==239)?85:(256+85));
}
}
else if(y<240)
{
X6502_Run((256+85)*y);
if(SpriteON) PPU_status|=0x40; // Quick and very dirty hack.
X6502_Run((256+85)*(240-y));
}
else
X6502_Run((256+85)*240);
}
#endif
else
{
int x,max,maxref;
deemp=PPU[1]>>5;
for(scanline=0;scanline<240;) //scanline is incremented in DoLine. Evil. :/
{
deempcnt[deemp]++;
DEBUG(FCEUD_UpdatePPUView(scanline, 1));
DoLine();
}
if(MMC5Hack && (ScreenON || SpriteON)) MMC5_hb(scanline);
for(x=1,max=0,maxref=0;x<7;x++)
{
if(deempcnt[x]>max)
{
max=deempcnt[x];
maxref=x;
}
deempcnt[x]=0;
}
//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);
//memset(deempcnt,0,sizeof(deempcnt));
SetNESDeemph(maxref,0);
}
} /* else... to if(ppudead) */
#ifdef FRAMESKIP
if(skip)
{
FCEU_PutImageDummy();
return(0);
}
else
#endif
{
//if(tileview) TileView();
FCEU_PutImage();
return(1);
}
}
static uint16 TempAddrT,RefreshAddrT;
void FCEUPPU_LoadState(int version)
{
TempAddr=TempAddrT;
RefreshAddr=RefreshAddrT;
}
SFORMAT FCEUPPU_STATEINFO[]={
{ NTARAM, 0x800, "NTAR"},
{ PALRAM, 0x20, "PRAM"},
{ SPRAM, 0x100, "SPRA"},
{ PPU, 0x4, "PPUR"},
{ &kook, 1, "KOOK"},
{ &ppudead, 1, "DEAD"},
{ &PPUSPL, 1, "PSPL"},
{ &XOffset, 1, "XOFF"},
{ &vtoggle, 1, "VTOG"},
{ &RefreshAddrT, 2|FCEUSTATE_RLSB, "RADD"},
{ &TempAddrT, 2|FCEUSTATE_RLSB, "TADD"},
{ &VRAMBuffer, 1, "VBUF"},
{ &PPUGenLatch, 1, "PGEN"},
{ 0 }
};
void FCEUPPU_SaveState(void)
{
TempAddrT=TempAddr;
RefreshAddrT=RefreshAddr;
}
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