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https://github.com/dborth/fceugx.git
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63 lines
1.5 KiB
C
63 lines
1.5 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) 2003 CaH4e3
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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 rom_sw mapbyte1[0]
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void Mapper230_Reset(void)
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{
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rom_sw ^= 1; //1 - rom_sw;
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if( rom_sw ) {
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ROM_BANK16(0x8000,0);
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ROM_BANK16(0xc000,7);
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} else {
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ROM_BANK16(0x8000,8);
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ROM_BANK16(0xc000,39);
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}
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MIRROR_SET2(1);
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}
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static DECLFW(Mapper230_write)
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{
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if( rom_sw ) {
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ROM_BANK16( 0x8000, V&0x07 );
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} else {
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if( V & 0x20 ) {
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ROM_BANK16( 0x8000, (V&0x1F)+8 );
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ROM_BANK16( 0xc000, (V&0x1F)+8 );
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} else {
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ROM_BANK32( ((V&0x1E) >> 1) + 4 );
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}
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MIRROR_SET2( ((V & 0x40) >> 6) );
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}
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}
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void Mapper230_init(void)
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{
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ROM_BANK16(0x8000,0);
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ROM_BANK16(0xc000,7);
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SetWriteHandler(0x8000, 0xffff, Mapper230_write);
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MapperReset = Mapper230_Reset;
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rom_sw = 1;
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}
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