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https://github.com/dborth/fceugx.git
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48 lines
1.4 KiB
C++
48 lines
1.4 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 map75sel mapbyte1[0]
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#define map75ar mapbyte2
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DECLFW(Mapper75_write)
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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 0x9000:
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VROM_BANK4(0x0000,map75ar[0]|((V&2)<<3));
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VROM_BANK4(0x1000,map75ar[1]|((V&4)<<2));
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map75sel=V;MIRROR_SET(V&1);break;
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case 0xa000:ROM_BANK8(0xa000,V);break;
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case 0xc000:ROM_BANK8(0xc000,V);break;
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case 0xe000:V&=0xF;map75ar[0]=V;V|=(map75sel&2)<<3;VROM_BANK4(0x0000,V);break;
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case 0xf000:V&=0xF;map75ar[1]=V;V|=(map75sel&4)<<2;VROM_BANK4(0x1000,V);break;
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}
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}
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void Mapper75_init(void)
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{
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SetWriteHandler(0x8000,0xffff,Mapper75_write);
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}
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