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54 lines
1.3 KiB
C
54 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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static DECLFW(Mapper228_write)
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{
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uint32 page,pagel,pageh;
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MIRROR_SET((A>>13)&1);
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page=(A>>7)&0x3F;
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//printf("%04x\n",A);
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if((page&0x30)==0x30)
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page-=0x10;
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pagel=pageh=(page<<1) + (((A>>6)&1)&((A>>5)&1));
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pageh+=((A>>5)&1)^1;
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ROM_BANK16(0x8000,pagel);
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ROM_BANK16(0xC000,pageh);
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VROM_BANK8( (V&0x3) | ((A&0xF)<<2) );
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}
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static void A52Reset(void)
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{
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Mapper228_write(0,0);
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}
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void Mapper228_init(void)
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{
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MapperReset=A52Reset;
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A52Reset();
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SetWriteHandler(0x8000,0xffff,Mapper228_write);
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}
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