fceugx/source/fceultra/mappers/228.cpp

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2002 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(Mapper228_write)
{
 uint32 page,pagel,pageh;

 MIRROR_SET((A>>13)&1);

 page=(A>>7)&0x3F;
 //printf("%04x\n",A);
 if((page&0x30)==0x30)
  page-=0x10;
 
 pagel=pageh=(page<<1) + (((A>>6)&1)&((A>>5)&1));
 pageh+=((A>>5)&1)^1;

 ROM_BANK16(0x8000,pagel);
 ROM_BANK16(0xC000,pageh);
 VROM_BANK8( (V&0x3) | ((A&0xF)<<2) );
}

static void A52Reset(void)
{
 Mapper228_write(0,0);
}

void Mapper228_init(void)
{
  MapperReset=A52Reset;
  A52Reset();
  SetWriteHandler(0x8000,0xffff,Mapper228_write);
}