mirror of
https://github.com/dborth/fceugx.git
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101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
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/* 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 "mapinc.h"
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static uint32 lastA;
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static int isfu;
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static uint8 CCache[8];
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static void FP_FASTAPASS(1) Fudou_PPU(uint32 A)
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{
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static int last=-1;
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static uint8 z;
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if(A>=0x2000) return;
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A>>=10;
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lastA=A;
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z=CCache[A];
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if(z!=last)
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{
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onemir(z);
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last=z;
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}
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}
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static void mira()
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{
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if(isfu)
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{
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int x;
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CCache[0]=CCache[1]=mapbyte2[0]>>7;
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CCache[2]=CCache[3]=mapbyte2[1]>>7;
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for(x=0;x<4;x++)
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CCache[4+x]=mapbyte2[2+x]>>7;
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onemir(CCache[lastA]);
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}
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else
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MIRROR_SET2(mapbyte1[0]&1);
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}
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static DECLFW(Mapper80_write)
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{
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switch(A)
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{
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case 0x7ef0: mapbyte2[0]=V;VROM_BANK2(0x0000,(V>>1)&0x3F);mira();break;
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case 0x7ef1: mapbyte2[1]=V;VROM_BANK2(0x0800,(V>>1)&0x3f);mira();break;
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case 0x7ef2: mapbyte2[2]=V;VROM_BANK1(0x1000,V);mira();break;
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case 0x7ef3: mapbyte2[3]=V;VROM_BANK1(0x1400,V);mira();break;
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case 0x7ef4: mapbyte2[4]=V;VROM_BANK1(0x1800,V);mira();break;
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case 0x7ef5: mapbyte2[5]=V;VROM_BANK1(0x1c00,V);mira();break;
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case 0x7ef6: mapbyte1[0]=V;mira();break;
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case 0x7efa:
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case 0x7efb: ROM_BANK8(0x8000,V);break;
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case 0x7efd:
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case 0x7efc: ROM_BANK8(0xA000,V);break;
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case 0x7efe:
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case 0x7eff: ROM_BANK8(0xC000,V);break;
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}
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}
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static void booga(int version)
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{
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mira();
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}
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void Mapper80_init(void)
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{
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SetWriteHandler(0x4020,0x7fff,Mapper80_write);
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MapStateRestore=booga;
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isfu=0;
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}
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void Mapper207_init(void)
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{
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Mapper80_init();
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isfu=1;
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PPU_hook=Fudou_PPU;
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}
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