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https://github.com/dborth/fceugx.git
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88 lines
1.9 KiB
C
88 lines
1.9 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 "mapinc.h"
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#define reg1 mapbyte1[0]
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#define reg2 mapbyte1[1]
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#define reg3 mapbyte1[2]
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#define reg4 mapbyte1[3]
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DECLFR(A110in1read)
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{
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switch(A&0x3)
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{
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case 0:return reg1;break;
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case 1:return reg2;break;
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case 2:return reg3;break;
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case 3:return reg4;break;
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}
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return 0xF;
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}
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DECLFW(A110in1regwr)
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{
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switch(A&0x3)
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{
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case 0:reg1=V&0xF;break;
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case 1:reg2=V&0xF;break;
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case 2:reg3=V&0xF;break;
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case 3:reg4=V&0xF;break;
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}
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}
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DECLFW(Mapper225_write)
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{
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int banks=0;
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MIRROR_SET((A>>13)&1);
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if(A&0x4000)
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banks=1;
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else
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banks=0;
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VROM_BANK8(((A&0x003f)+(banks<<6)));
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if(A&0x1000)
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{
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if(A&0x40)
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{
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ROM_BANK16(0x8000,((((((A>>7)&0x1F)+(banks<<5)))<<1)+1));
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ROM_BANK16(0xC000,((((((A>>7)&0x1F)+(banks<<5)))<<1)+1));
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}
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else
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{
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ROM_BANK16(0x8000,(((((A>>7)&0x1F)+(banks<<5)))<<1));
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ROM_BANK16(0xC000,(((((A>>7)&0x1F)+(banks<<5)))<<1));
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}
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}
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else
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{
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ROM_BANK32(((((A>>7)&0x1F)+(banks<<5))));
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}
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}
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void Mapper225_init(void)
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{
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SetWriteHandler(0x8000,0xffff,Mapper225_write);
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SetReadHandler(0x5800,0x5fff,A110in1read);
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SetWriteHandler(0x5800,0x5fff,A110in1regwr);
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}
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