686 lines
12 KiB
C
686 lines
12 KiB
C
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2002 Xodnizel
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "types.h"
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#include "fceu.h"
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#include "ppu.h"
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#include "cart.h"
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#include "memory.h"
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#include "x6502.h"
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#include "general.h"
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/*
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This file contains all code for coordinating the mapping in of the
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address space external to the NES.
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It's also (ab)used by the NSF code.
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*/
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uint8 *Page[32],*VPage[8];
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uint8 **VPageR=VPage;
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uint8 *VPageG[8];
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uint8 *MMC5SPRVPage[8];
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uint8 *MMC5BGVPage[8];
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static uint8 PRGIsRAM[32]; /* This page is/is not PRG RAM. */
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/* 16 are (sort of) reserved for UNIF/iNES and 16 to map other stuff. */
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static int CHRram[32];
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static int PRGram[32];
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uint8 *PRGptr[32];
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uint8 *CHRptr[32];
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uint32 PRGsize[32];
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uint32 CHRsize[32];
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uint32 PRGmask2[32];
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uint32 PRGmask4[32];
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uint32 PRGmask8[32];
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uint32 PRGmask16[32];
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uint32 PRGmask32[32];
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uint32 CHRmask1[32];
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uint32 CHRmask2[32];
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uint32 CHRmask4[32];
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uint32 CHRmask8[32];
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int geniestage=0;
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int modcon;
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uint8 genieval[3];
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uint8 geniech[3];
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uint32 genieaddr[3];
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static INLINE void setpageptr(int s, uint32 A, uint8 *p, int ram)
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{
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uint32 AB=A>>11;
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int x;
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if(p)
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for(x=(s>>1)-1;x>=0;x--)
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{
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PRGIsRAM[AB+x]=ram;
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Page[AB+x]=p-A;
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}
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else
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for(x=(s>>1)-1;x>=0;x--)
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{
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PRGIsRAM[AB+x]=0;
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Page[AB+x]=0;
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}
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}
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static uint8 nothing[8192];
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void ResetCartMapping(void)
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{
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int x;
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for(x=0;x<32;x++)
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{
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Page[x]=nothing-x*2048;
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PRGptr[x]=CHRptr[x]=0;
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PRGsize[x]=CHRsize[x]=0;
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}
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for(x=0;x<8;x++)
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{
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MMC5SPRVPage[x]=MMC5BGVPage[x]=VPageR[x]=nothing-0x400*x;
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}
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}
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void SetupCartPRGMapping(int chip, uint8 *p, uint32 size, int ram)
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{
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PRGptr[chip]=p;
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PRGsize[chip]=size;
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PRGmask2[chip]=(size>>11)-1;
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PRGmask4[chip]=(size>>12)-1;
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PRGmask8[chip]=(size>>13)-1;
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PRGmask16[chip]=(size>>14)-1;
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PRGmask32[chip]=(size>>15)-1;
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PRGram[chip]=ram?1:0;
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}
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void SetupCartCHRMapping(int chip, uint8 *p, uint32 size, int ram)
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{
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CHRptr[chip]=p;
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CHRsize[chip]=size;
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CHRmask1[chip]=(size>>10)-1;
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CHRmask2[chip]=(size>>11)-1;
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CHRmask4[chip]=(size>>12)-1;
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CHRmask8[chip]=(size>>13)-1;
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CHRram[chip]=ram;
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}
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DECLFR(CartBR)
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{
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return Page[A>>11][A];
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}
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DECLFW(CartBW)
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{
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//printf("Ok: %04x:%02x, %d\n",A,V,PRGIsRAM[A>>11]);
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if(PRGIsRAM[A>>11] && Page[A>>11])
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Page[A>>11][A]=V;
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}
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DECLFR(CartBROB)
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{
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if(!Page[A>>11]) return(X.DB);
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return Page[A>>11][A];
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}
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void FASTAPASS(3) setprg2r(int r, unsigned int A, unsigned int V)
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{
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V&=PRGmask2[r];
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setpageptr(2,A,PRGptr[r]?(&PRGptr[r][V<<11]):0,PRGram[r]);
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}
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void FASTAPASS(2) setprg2(uint32 A, uint32 V)
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{
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setprg2r(0,A,V);
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}
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void FASTAPASS(3) setprg4r(int r, unsigned int A, unsigned int V)
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{
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V&=PRGmask4[r];
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setpageptr(4,A,PRGptr[r]?(&PRGptr[r][V<<12]):0,PRGram[r]);
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}
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void FASTAPASS(2) setprg4(uint32 A, uint32 V)
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{
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setprg4r(0,A,V);
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}
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void FASTAPASS(3) setprg8r(int r, unsigned int A, unsigned int V)
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{
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if(PRGsize[r]>=8192)
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{
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V&=PRGmask8[r];
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setpageptr(8,A,PRGptr[r]?(&PRGptr[r][V<<13]):0,PRGram[r]);
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}
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else
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{
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uint32 VA=V<<2;
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int x;
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for(x=0;x<4;x++)
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setpageptr(2,A+(x<<11),PRGptr[r]?(&PRGptr[r][((VA+x)&PRGmask2[r])<<11]):0,PRGram[r]);
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}
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}
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void FASTAPASS(2) setprg8(uint32 A, uint32 V)
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{
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setprg8r(0,A,V);
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}
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void FASTAPASS(3) setprg16r(int r, unsigned int A, unsigned int V)
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{
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if(PRGsize[r]>=16384)
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{
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V&=PRGmask16[r];
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setpageptr(16,A,PRGptr[r]?(&PRGptr[r][V<<14]):0,PRGram[r]);
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}
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else
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{
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uint32 VA=V<<3;
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int x;
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for(x=0;x<8;x++)
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setpageptr(2,A+(x<<11),PRGptr[r]?(&PRGptr[r][((VA+x)&PRGmask2[r])<<11]):0,PRGram[r]);
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}
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}
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void FASTAPASS(2) setprg16(uint32 A, uint32 V)
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{
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setprg16r(0,A,V);
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}
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void FASTAPASS(3) setprg32r(int r,unsigned int A, unsigned int V)
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{
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if(PRGsize[r]>=32768)
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{
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V&=PRGmask32[r];
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setpageptr(32,A,PRGptr[r]?(&PRGptr[r][V<<15]):0,PRGram[r]);
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}
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else
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{
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uint32 VA=V<<4;
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int x;
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for(x=0;x<16;x++)
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setpageptr(2,A+(x<<11),PRGptr[r]?(&PRGptr[r][((VA+x)&PRGmask2[r])<<11]):0,PRGram[r]);
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}
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}
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void FASTAPASS(2) setprg32(uint32 A, uint32 V)
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{
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setprg32r(0,A,V);
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}
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void FASTAPASS(3) setchr1r(int r, unsigned int A, unsigned int V)
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{
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if(!CHRptr[r]) return;
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FCEUPPU_LineUpdate();
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V&=CHRmask1[r];
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if(CHRram[r])
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PPUCHRRAM|=(1<<(A>>10));
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else
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PPUCHRRAM&=~(1<<(A>>10));
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VPageR[(A)>>10]=&CHRptr[r][(V)<<10]-(A);
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}
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void FASTAPASS(3) setchr2r(int r, unsigned int A, unsigned int V)
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{
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if(!CHRptr[r]) return;
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FCEUPPU_LineUpdate();
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V&=CHRmask2[r];
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VPageR[(A)>>10]=VPageR[((A)>>10)+1]=&CHRptr[r][(V)<<11]-(A);
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if(CHRram[r])
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PPUCHRRAM|=(3<<(A>>10));
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else
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PPUCHRRAM&=~(3<<(A>>10));
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}
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void FASTAPASS(3) setchr4r(int r, unsigned int A, unsigned int V)
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{
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if(!CHRptr[r]) return;
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FCEUPPU_LineUpdate();
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V&=CHRmask4[r];
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VPageR[(A)>>10]=VPageR[((A)>>10)+1]=
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VPageR[((A)>>10)+2]=VPageR[((A)>>10)+3]=&CHRptr[r][(V)<<12]-(A);
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if(CHRram[r])
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PPUCHRRAM|=(15<<(A>>10));
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else
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PPUCHRRAM&=~(15<<(A>>10));
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}
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void FASTAPASS(2) setchr8r(int r, unsigned int V)
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{
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int x;
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if(!CHRptr[r]) return;
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FCEUPPU_LineUpdate();
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V&=CHRmask8[r];
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for(x=7;x>=0;x--)
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VPageR[x]=&CHRptr[r][V<<13];
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if(CHRram[r])
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PPUCHRRAM|=(255);
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else
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PPUCHRRAM&=~(255);
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}
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void FASTAPASS(2) setchr1(unsigned int A, unsigned int V)
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{
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setchr1r(0,A,V);
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}
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void FASTAPASS(2) setchr2(unsigned int A, unsigned int V)
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{
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setchr2r(0,A,V);
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}
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void FASTAPASS(2) setchr4(unsigned int A, unsigned int V)
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{
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setchr4r(0,A,V);
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}
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void FASTAPASS(1) setchr8(unsigned int V)
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{
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setchr8r(0,V);
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}
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void FASTAPASS(1) setvram8(uint8 *p)
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{
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int x;
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for(x=7;x>=0;x--)
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VPageR[x]=p;
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PPUCHRRAM|=255;
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}
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void FASTAPASS(2) setvram4(uint32 A, uint8 *p)
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{
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int x;
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for(x=3;x>=0;x--)
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VPageR[(A>>10)+x]=p-A;
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PPUCHRRAM|=(15<<(A>>10));
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}
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void FASTAPASS(3) setvramb1(uint8 *p, uint32 A, uint32 b)
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{
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FCEUPPU_LineUpdate();
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VPageR[A>>10]=p-A+(b<<10);
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PPUCHRRAM|=(1<<(A>>10));
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}
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void FASTAPASS(3) setvramb2(uint8 *p, uint32 A, uint32 b)
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{
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FCEUPPU_LineUpdate();
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VPageR[(A>>10)]=VPageR[(A>>10)+1]=p-A+(b<<11);
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PPUCHRRAM|=(3<<(A>>10));
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}
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void FASTAPASS(3) setvramb4(uint8 *p, uint32 A, uint32 b)
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{
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int x;
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FCEUPPU_LineUpdate();
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for(x=3;x>=0;x--)
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VPageR[(A>>10)+x]=p-A+(b<<12);
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PPUCHRRAM|=(15<<(A>>10));
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}
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void FASTAPASS(2) setvramb8(uint8 *p, uint32 b)
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{
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int x;
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FCEUPPU_LineUpdate();
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for(x=7;x>=0;x--)
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VPageR[x]=p+(b<<13);
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PPUCHRRAM|=255;
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}
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/* This function can be called without calling SetupCartMirroring(). */
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void FASTAPASS(3) setntamem(uint8 *p, int ram, uint32 b)
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{
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FCEUPPU_LineUpdate();
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vnapage[b]=p;
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PPUNTARAM&=~(1<<b);
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if(ram)
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PPUNTARAM|=1<<b;
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}
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static int mirrorhard=0;
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void setmirrorw(int a, int b, int c, int d)
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{
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FCEUPPU_LineUpdate();
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vnapage[0]=NTARAM+a*0x400;
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vnapage[1]=NTARAM+b*0x400;
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vnapage[2]=NTARAM+c*0x400;
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vnapage[3]=NTARAM+d*0x400;
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}
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void FASTAPASS(1) setmirror(int t)
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{
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FCEUPPU_LineUpdate();
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if(!mirrorhard)
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{
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switch(t)
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{
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case MI_H:
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vnapage[0]=vnapage[1]=NTARAM;vnapage[2]=vnapage[3]=NTARAM+0x400;
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break;
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case MI_V:
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vnapage[0]=vnapage[2]=NTARAM;vnapage[1]=vnapage[3]=NTARAM+0x400;
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break;
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case MI_0:
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vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=NTARAM;
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break;
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case MI_1:
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vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=NTARAM+0x400;
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break;
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}
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PPUNTARAM=0xF;
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}
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}
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void SetupCartMirroring(int m, int hard, uint8 *extra)
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{
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if(m<4)
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{
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mirrorhard = 0;
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setmirror(m);
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}
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else
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{
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vnapage[0]=NTARAM;
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vnapage[1]=NTARAM+0x400;
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vnapage[2]=extra;
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vnapage[3]=extra+0x400;
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PPUNTARAM=0xF;
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}
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mirrorhard=hard;
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}
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static uint8 *GENIEROM=0;
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void FixGenieMap(void);
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/* Called when a game(file) is opened successfully. */
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void OpenGenie(void)
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{
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FILE *fp;
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int x;
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if(!GENIEROM)
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{
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char *fn;
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if(!(GENIEROM=(uint8 *)FCEU_malloc(4096+1024))) return;
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fn=FCEU_MakeFName(FCEUMKF_GGROM,0,0);
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fp=FCEUD_UTF8fopen(fn,"rb");
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if(!fp)
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{
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FCEU_PrintError("Error opening Game Genie ROM image!");
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free(GENIEROM);
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GENIEROM=0;
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return;
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}
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if(fread(GENIEROM,1,16,fp)!=16)
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{
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grerr:
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FCEU_PrintError("Error reading from Game Genie ROM image!");
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free(GENIEROM);
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GENIEROM=0;
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fclose(fp);
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return;
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}
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if(GENIEROM[0]==0x4E) /* iNES ROM image */
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{
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if(fread(GENIEROM,1,4096,fp)!=4096)
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goto grerr;
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if(fseek(fp,16384-4096,SEEK_CUR))
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goto grerr;
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if(fread(GENIEROM+4096,1,256,fp)!=256)
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goto grerr;
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}
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else
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{
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if(fread(GENIEROM+16,1,4352-16,fp)!=(4352-16))
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goto grerr;
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}
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fclose(fp);
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/* Workaround for the FCE Ultra CHR page size only being 1KB */
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for(x=0;x<4;x++)
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memcpy(GENIEROM+4096+(x<<8),GENIEROM+4096,256);
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}
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geniestage=1;
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}
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/* Called when a game is closed. */
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void CloseGenie(void)
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{
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/* No good reason to free() the Game Genie ROM image data. */
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geniestage=0;
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FlushGenieRW();
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VPageR=VPage;
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}
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void FCEU_KillGenie(void)
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{
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if(GENIEROM)
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{
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free(GENIEROM);
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GENIEROM=0;
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}
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}
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static DECLFR(GenieRead)
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{
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return GENIEROM[A&4095];
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}
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static DECLFW(GenieWrite)
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{
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switch(A)
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{
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case 0x800c:
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case 0x8008:
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case 0x8004:genieval[((A-4)&0xF)>>2]=V;break;
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case 0x800b:
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case 0x8007:
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case 0x8003:geniech[((A-3)&0xF)>>2]=V;break;
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case 0x800a:
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case 0x8006:
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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);
|
|
}
|
|
}
|
|
|
|
|