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58 lines
1.3 KiB
C
58 lines
1.3 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 calreg mapbyte1[0]
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#define calchr mapbyte1[1]
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DECLFW(Mapper41_write)
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{
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if(A<0x8000)
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{
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ROM_BANK32(A&7);
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MIRROR_SET((A>>5)&1);
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calreg=A;
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calchr&=0x3;
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calchr|=(A>>1)&0xC;
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VROM_BANK8(calchr);
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}
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else if(calreg&0x4)
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{
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calchr&=0xC;
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calchr|=A&3;
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VROM_BANK8(calchr);
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}
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}
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static void M41Reset(void)
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{
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calreg=calchr=0;
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}
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void Mapper41_init(void)
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{
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MapperReset=M41Reset;
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ROM_BANK32(0);
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SetWriteHandler(0x8000,0xffff,Mapper41_write);
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SetWriteHandler(0x6000,0x67ff,Mapper41_write);
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}
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