fceugx/source/fceultra/mappers/231.c
2008-09-02 01:55:12 +00:00

42 lines
1.1 KiB
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);
}