64 lines
1.7 KiB
C++
64 lines
1.7 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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#define K4buf mapbyte2
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DECLFW(Mapper22_write)
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{
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if(A<=0xAFFF)
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{
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switch(A&0xF000)
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{
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case 0x8000:ROM_BANK8(0x8000,V);break;
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case 0xa000:ROM_BANK8(0xA000,V);break;
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case 0x9000:switch(V&3)
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{
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case 0x00:MIRROR_SET2(1);break;
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case 0x01:MIRROR_SET2(0);break;
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case 0x02:onemir(0);break;
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case 0x03:onemir(1);break;
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}
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break;
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}
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}
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else
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{
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A&=0xF003;
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if(A>=0xb000 && A<=0xe003)
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{
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int x=(A&1)|((A-0xB000)>>11);
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K4buf[x]&=(0xF0)>>((A&2)<<1);
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K4buf[x]|=(V&0xF)<<((A&2)<<1);
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VROM_BANK1(x<<10,K4buf[x]>>1);
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}
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}
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}
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void Mapper22_init(void)
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{
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SetWriteHandler(0x8000,0xffff,Mapper22_write);
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}
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