merge mapper code from FCEUX

[fceu.git] / mappers / 46.c

/* 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "mapinc.h"



#define A64reg  mapbyte1[0]
#define A64wr   mapbyte1[1]

DECLFW(Mapper46_writel)
{
  A64reg=V;
  ROM_BANK32((A64wr&1)+((A64reg&0xF)<<1));
  VROM_BANK8(((A64wr>>4)&7)+((A64reg&0xF0)>>1));
}

DECLFW(Mapper46_write)
{
  A64wr=V;
  ROM_BANK32((V&1)+((A64reg&0xF)<<1));
  VROM_BANK8(((V>>4)&7)+((A64reg&0xF0)>>1));
}

void Mapper46_init(void)
{
 MIRROR_SET(0);
 ROM_BANK32(0);
 SetWriteHandler(0x8000,0xffff,Mapper46_write);
 SetWriteHandler(0x6000,0x7fff,Mapper46_writel);
}