fceux/cart.c

686 lines
12 KiB
C

/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2002 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 <stdlib.h>
#include <stdio.h>
#include "types.h"
#include "fceu.h"
#include "ppu.h"
#include "cart.h"
#include "memory.h"
#include "x6502.h"
#include "general.h"
/*
This file contains all code for coordinating the mapping in of the
address space external to the NES.
It's also (ab)used by the NSF code.
*/
uint8 *Page[32],*VPage[8];
uint8 **VPageR=VPage;
uint8 *VPageG[8];
uint8 *MMC5SPRVPage[8];
uint8 *MMC5BGVPage[8];
static uint8 PRGIsRAM[32]; /* This page is/is not PRG RAM. */
/* 16 are (sort of) reserved for UNIF/iNES and 16 to map other stuff. */
static int CHRram[32];
static int PRGram[32];
uint8 *PRGptr[32];
uint8 *CHRptr[32];
uint32 PRGsize[32];
uint32 CHRsize[32];
uint32 PRGmask2[32];
uint32 PRGmask4[32];
uint32 PRGmask8[32];
uint32 PRGmask16[32];
uint32 PRGmask32[32];
uint32 CHRmask1[32];
uint32 CHRmask2[32];
uint32 CHRmask4[32];
uint32 CHRmask8[32];
int geniestage=0;
int modcon;
uint8 genieval[3];
uint8 geniech[3];
uint32 genieaddr[3];
static INLINE void setpageptr(int s, uint32 A, uint8 *p, int ram)
{
uint32 AB=A>>11;
int x;
if(p)
for(x=(s>>1)-1;x>=0;x--)
{
PRGIsRAM[AB+x]=ram;
Page[AB+x]=p-A;
}
else
for(x=(s>>1)-1;x>=0;x--)
{
PRGIsRAM[AB+x]=0;
Page[AB+x]=0;
}
}
static uint8 nothing[8192];
void ResetCartMapping(void)
{
int x;
for(x=0;x<32;x++)
{
Page[x]=nothing-x*2048;
PRGptr[x]=CHRptr[x]=0;
PRGsize[x]=CHRsize[x]=0;
}
for(x=0;x<8;x++)
{
MMC5SPRVPage[x]=MMC5BGVPage[x]=VPageR[x]=nothing-0x400*x;
}
}
void SetupCartPRGMapping(int chip, uint8 *p, uint32 size, int ram)
{
PRGptr[chip]=p;
PRGsize[chip]=size;
PRGmask2[chip]=(size>>11)-1;
PRGmask4[chip]=(size>>12)-1;
PRGmask8[chip]=(size>>13)-1;
PRGmask16[chip]=(size>>14)-1;
PRGmask32[chip]=(size>>15)-1;
PRGram[chip]=ram?1:0;
}
void SetupCartCHRMapping(int chip, uint8 *p, uint32 size, int ram)
{
CHRptr[chip]=p;
CHRsize[chip]=size;
CHRmask1[chip]=(size>>10)-1;
CHRmask2[chip]=(size>>11)-1;
CHRmask4[chip]=(size>>12)-1;
CHRmask8[chip]=(size>>13)-1;
CHRram[chip]=ram;
}
DECLFR(CartBR)
{
return Page[A>>11][A];
}
DECLFW(CartBW)
{
//printf("Ok: %04x:%02x, %d\n",A,V,PRGIsRAM[A>>11]);
if(PRGIsRAM[A>>11] && Page[A>>11])
Page[A>>11][A]=V;
}
DECLFR(CartBROB)
{
if(!Page[A>>11]) return(X.DB);
return Page[A>>11][A];
}
void FASTAPASS(3) setprg2r(int r, unsigned int A, unsigned int V)
{
V&=PRGmask2[r];
setpageptr(2,A,PRGptr[r]?(&PRGptr[r][V<<11]):0,PRGram[r]);
}
void FASTAPASS(2) setprg2(uint32 A, uint32 V)
{
setprg2r(0,A,V);
}
void FASTAPASS(3) setprg4r(int r, unsigned int A, unsigned int V)
{
V&=PRGmask4[r];
setpageptr(4,A,PRGptr[r]?(&PRGptr[r][V<<12]):0,PRGram[r]);
}
void FASTAPASS(2) setprg4(uint32 A, uint32 V)
{
setprg4r(0,A,V);
}
void FASTAPASS(3) setprg8r(int r, unsigned int A, unsigned int V)
{
if(PRGsize[r]>=8192)
{
V&=PRGmask8[r];
setpageptr(8,A,PRGptr[r]?(&PRGptr[r][V<<13]):0,PRGram[r]);
}
else
{
uint32 VA=V<<2;
int x;
for(x=0;x<4;x++)
setpageptr(2,A+(x<<11),PRGptr[r]?(&PRGptr[r][((VA+x)&PRGmask2[r])<<11]):0,PRGram[r]);
}
}
void FASTAPASS(2) setprg8(uint32 A, uint32 V)
{
setprg8r(0,A,V);
}
void FASTAPASS(3) setprg16r(int r, unsigned int A, unsigned int V)
{
if(PRGsize[r]>=16384)
{
V&=PRGmask16[r];
setpageptr(16,A,PRGptr[r]?(&PRGptr[r][V<<14]):0,PRGram[r]);
}
else
{
uint32 VA=V<<3;
int x;
for(x=0;x<8;x++)
setpageptr(2,A+(x<<11),PRGptr[r]?(&PRGptr[r][((VA+x)&PRGmask2[r])<<11]):0,PRGram[r]);
}
}
void FASTAPASS(2) setprg16(uint32 A, uint32 V)
{
setprg16r(0,A,V);
}
void FASTAPASS(3) setprg32r(int r,unsigned int A, unsigned int V)
{
if(PRGsize[r]>=32768)
{
V&=PRGmask32[r];
setpageptr(32,A,PRGptr[r]?(&PRGptr[r][V<<15]):0,PRGram[r]);
}
else
{
uint32 VA=V<<4;
int x;
for(x=0;x<16;x++)
setpageptr(2,A+(x<<11),PRGptr[r]?(&PRGptr[r][((VA+x)&PRGmask2[r])<<11]):0,PRGram[r]);
}
}
void FASTAPASS(2) setprg32(uint32 A, uint32 V)
{
setprg32r(0,A,V);
}
void FASTAPASS(3) setchr1r(int r, unsigned int A, unsigned int V)
{
if(!CHRptr[r]) return;
FCEUPPU_LineUpdate();
V&=CHRmask1[r];
if(CHRram[r])
PPUCHRRAM|=(1<<(A>>10));
else
PPUCHRRAM&=~(1<<(A>>10));
VPageR[(A)>>10]=&CHRptr[r][(V)<<10]-(A);
}
void FASTAPASS(3) setchr2r(int r, unsigned int A, unsigned int V)
{
if(!CHRptr[r]) return;
FCEUPPU_LineUpdate();
V&=CHRmask2[r];
VPageR[(A)>>10]=VPageR[((A)>>10)+1]=&CHRptr[r][(V)<<11]-(A);
if(CHRram[r])
PPUCHRRAM|=(3<<(A>>10));
else
PPUCHRRAM&=~(3<<(A>>10));
}
void FASTAPASS(3) setchr4r(int r, unsigned int A, unsigned int V)
{
if(!CHRptr[r]) return;
FCEUPPU_LineUpdate();
V&=CHRmask4[r];
VPageR[(A)>>10]=VPageR[((A)>>10)+1]=
VPageR[((A)>>10)+2]=VPageR[((A)>>10)+3]=&CHRptr[r][(V)<<12]-(A);
if(CHRram[r])
PPUCHRRAM|=(15<<(A>>10));
else
PPUCHRRAM&=~(15<<(A>>10));
}
void FASTAPASS(2) setchr8r(int r, unsigned int V)
{
int x;
if(!CHRptr[r]) return;
FCEUPPU_LineUpdate();
V&=CHRmask8[r];
for(x=7;x>=0;x--)
VPageR[x]=&CHRptr[r][V<<13];
if(CHRram[r])
PPUCHRRAM|=(255);
else
PPUCHRRAM&=~(255);
}
void FASTAPASS(2) setchr1(unsigned int A, unsigned int V)
{
setchr1r(0,A,V);
}
void FASTAPASS(2) setchr2(unsigned int A, unsigned int V)
{
setchr2r(0,A,V);
}
void FASTAPASS(2) setchr4(unsigned int A, unsigned int V)
{
setchr4r(0,A,V);
}
void FASTAPASS(1) setchr8(unsigned int V)
{
setchr8r(0,V);
}
void FASTAPASS(1) setvram8(uint8 *p)
{
int x;
for(x=7;x>=0;x--)
VPageR[x]=p;
PPUCHRRAM|=255;
}
void FASTAPASS(2) setvram4(uint32 A, uint8 *p)
{
int x;
for(x=3;x>=0;x--)
VPageR[(A>>10)+x]=p-A;
PPUCHRRAM|=(15<<(A>>10));
}
void FASTAPASS(3) setvramb1(uint8 *p, uint32 A, uint32 b)
{
FCEUPPU_LineUpdate();
VPageR[A>>10]=p-A+(b<<10);
PPUCHRRAM|=(1<<(A>>10));
}
void FASTAPASS(3) setvramb2(uint8 *p, uint32 A, uint32 b)
{
FCEUPPU_LineUpdate();
VPageR[(A>>10)]=VPageR[(A>>10)+1]=p-A+(b<<11);
PPUCHRRAM|=(3<<(A>>10));
}
void FASTAPASS(3) setvramb4(uint8 *p, uint32 A, uint32 b)
{
int x;
FCEUPPU_LineUpdate();
for(x=3;x>=0;x--)
VPageR[(A>>10)+x]=p-A+(b<<12);
PPUCHRRAM|=(15<<(A>>10));
}
void FASTAPASS(2) setvramb8(uint8 *p, uint32 b)
{
int x;
FCEUPPU_LineUpdate();
for(x=7;x>=0;x--)
VPageR[x]=p+(b<<13);
PPUCHRRAM|=255;
}
/* This function can be called without calling SetupCartMirroring(). */
void FASTAPASS(3) setntamem(uint8 *p, int ram, uint32 b)
{
FCEUPPU_LineUpdate();
vnapage[b]=p;
PPUNTARAM&=~(1<<b);
if(ram)
PPUNTARAM|=1<<b;
}
static int mirrorhard=0;
void setmirrorw(int a, int b, int c, int d)
{
FCEUPPU_LineUpdate();
vnapage[0]=NTARAM+a*0x400;
vnapage[1]=NTARAM+b*0x400;
vnapage[2]=NTARAM+c*0x400;
vnapage[3]=NTARAM+d*0x400;
}
void FASTAPASS(1) setmirror(int t)
{
FCEUPPU_LineUpdate();
if(!mirrorhard)
{
switch(t)
{
case MI_H:
vnapage[0]=vnapage[1]=NTARAM;vnapage[2]=vnapage[3]=NTARAM+0x400;
break;
case MI_V:
vnapage[0]=vnapage[2]=NTARAM;vnapage[1]=vnapage[3]=NTARAM+0x400;
break;
case MI_0:
vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=NTARAM;
break;
case MI_1:
vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=NTARAM+0x400;
break;
}
PPUNTARAM=0xF;
}
}
void SetupCartMirroring(int m, int hard, uint8 *extra)
{
if(m<4)
{
mirrorhard = 0;
setmirror(m);
}
else
{
vnapage[0]=NTARAM;
vnapage[1]=NTARAM+0x400;
vnapage[2]=extra;
vnapage[3]=extra+0x400;
PPUNTARAM=0xF;
}
mirrorhard=hard;
}
static uint8 *GENIEROM=0;
void FixGenieMap(void);
/* Called when a game(file) is opened successfully. */
void OpenGenie(void)
{
FILE *fp;
int x;
if(!GENIEROM)
{
char *fn;
if(!(GENIEROM=(uint8 *)FCEU_malloc(4096+1024))) return;
fn=FCEU_MakeFName(FCEUMKF_GGROM,0,0);
fp=FCEUD_UTF8fopen(fn,"rb");
if(!fp)
{
FCEU_PrintError("Error opening Game Genie ROM image!");
free(GENIEROM);
GENIEROM=0;
return;
}
if(fread(GENIEROM,1,16,fp)!=16)
{
grerr:
FCEU_PrintError("Error reading from Game Genie ROM image!");
free(GENIEROM);
GENIEROM=0;
fclose(fp);
return;
}
if(GENIEROM[0]==0x4E) /* iNES ROM image */
{
if(fread(GENIEROM,1,4096,fp)!=4096)
goto grerr;
if(fseek(fp,16384-4096,SEEK_CUR))
goto grerr;
if(fread(GENIEROM+4096,1,256,fp)!=256)
goto grerr;
}
else
{
if(fread(GENIEROM+16,1,4352-16,fp)!=(4352-16))
goto grerr;
}
fclose(fp);
/* Workaround for the FCE Ultra CHR page size only being 1KB */
for(x=0;x<4;x++)
memcpy(GENIEROM+4096+(x<<8),GENIEROM+4096,256);
}
geniestage=1;
}
/* Called when a game is closed. */
void CloseGenie(void)
{
/* No good reason to free() the Game Genie ROM image data. */
geniestage=0;
FlushGenieRW();
VPageR=VPage;
}
void FCEU_KillGenie(void)
{
if(GENIEROM)
{
free(GENIEROM);
GENIEROM=0;
}
}
static DECLFR(GenieRead)
{
return GENIEROM[A&4095];
}
static DECLFW(GenieWrite)
{
switch(A)
{
case 0x800c:
case 0x8008:
case 0x8004:genieval[((A-4)&0xF)>>2]=V;break;
case 0x800b:
case 0x8007:
case 0x8003:geniech[((A-3)&0xF)>>2]=V;break;
case 0x800a:
case 0x8006:
case 0x8002:genieaddr[((A-2)&0xF)>>2]&=0xFF00;genieaddr[((A-2)&0xF)>>2]|=V;break;
case 0x8009:
case 0x8005:
case 0x8001:genieaddr[((A-1)&0xF)>>2]&=0xFF;genieaddr[((A-1)&0xF)>>2]|=(V|0x80)<<8;break;
case 0x8000:if(!V)
FixGenieMap();
else
{
modcon=V^0xFF;
if(V==0x71)
modcon=0;
}
break;
}
}
static readfunc GenieBackup[3];
static DECLFR(GenieFix1)
{
uint8 r=GenieBackup[0](A);
if((modcon>>1)&1) // No check
return genieval[0];
else if(r==geniech[0])
return genieval[0];
return r;
}
static DECLFR(GenieFix2)
{
uint8 r=GenieBackup[1](A);
if((modcon>>2)&1) // No check
return genieval[1];
else if(r==geniech[1])
return genieval[1];
return r;
}
static DECLFR(GenieFix3)
{
uint8 r=GenieBackup[2](A);
if((modcon>>3)&1) // No check
return genieval[2];
else if(r==geniech[2])
return genieval[2];
return r;
}
void FixGenieMap(void)
{
int x;
geniestage=2;
for(x=0;x<8;x++)
VPage[x]=VPageG[x];
VPageR=VPage;
FlushGenieRW();
//printf("Rightyo\n");
for(x=0;x<3;x++)
if((modcon>>(4+x))&1)
{
readfunc tmp[3]={GenieFix1,GenieFix2,GenieFix3};
GenieBackup[x]=GetReadHandler(genieaddr[x]);
SetReadHandler(genieaddr[x],genieaddr[x],tmp[x]);
}
}
void GeniePower(void)
{
uint32 x;
if(!geniestage)
return;
geniestage=1;
for(x=0;x<3;x++)
{
genieval[x]=0xFF;
geniech[x]=0xFF;
genieaddr[x]=0xFFFF;
}
modcon=0;
SetWriteHandler(0x8000,0xFFFF,GenieWrite);
SetReadHandler(0x8000,0xFFFF,GenieRead);
for(x=0;x<8;x++)
VPage[x]=GENIEROM+4096-0x400*x;
if(AllocGenieRW())
VPageR=VPageG;
else
geniestage=2;
}
void FCEU_SaveGameSave(CartInfo *LocalHWInfo)
{
if(LocalHWInfo->battery && LocalHWInfo->SaveGame[0])
{
FILE *sp;
char *soot;
soot=FCEU_MakeFName(FCEUMKF_SAV,0,"sav");
if((sp=FCEUD_UTF8fopen(soot,"wb"))==NULL)
{
FCEU_PrintError("WRAM file \"%s\" cannot be written to.\n",soot);
}
else
{
int x;
for(x=0;x<4;x++)
if(LocalHWInfo->SaveGame[x])
{
fwrite(LocalHWInfo->SaveGame[x],1,
LocalHWInfo->SaveGameLen[x],sp);
}
}
free(soot);
}
}
// hack, movie.c has to communicate with this function somehow
int disableBatteryLoading=0;
void FCEU_LoadGameSave(CartInfo *LocalHWInfo)
{
if(LocalHWInfo->battery && LocalHWInfo->SaveGame[0] && !disableBatteryLoading)
{
FILE *sp;
char *soot;
soot=FCEU_MakeFName(FCEUMKF_SAV,0,"sav");
sp=FCEUD_UTF8fopen(soot,"rb");
if(sp!=NULL)
{
int x;
for(x=0;x<4;x++)
if(LocalHWInfo->SaveGame[x])
fread(LocalHWInfo->SaveGame[x],1,LocalHWInfo->SaveGameLen[x],sp);
}
free(soot);
}
}