merge mappers from FCEU-mm

[fceu.git] / mappers / 231.c

/* FCE Ultra - NES/Famicom Emulator
 * 
 * Copyright notice for this file:
 *  Copyright (C) 2003 Xodnizel
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *      
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */  

#include "mapinc.h"

static DECLFW(Mapper231_write)
{
 if(A&0x20)
  ROM_BANK32((A>>1)&0xF);
 else
 {
  ROM_BANK16(0x8000,(A&0x1E));
  ROM_BANK16(0xc000,(A&0x1E));
 }
 MIRROR_SET((A>>7)&1);
}

void Mapper231_init(void)
{
   ROM_BANK16(0x8000,0);
   ROM_BANK16(0xc000,0);
   SetWriteHandler(0x8000,0xffff,Mapper231_write);
}