fceux/boards/189.c

49 lines
1.4 KiB
C

/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2005 CaH4e3
*
* 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"
#include "mmc3.h"
static void M189PW(uint32 A, uint8 V)
{
setprg32(0x8000,EXPREGS[0]&3);
}
static DECLFW(M189Write)
{
EXPREGS[0]=V|(V>>4); //actually, there is a two versions of 189 mapper with hi or lo bits bankswitching.
FixMMC3PRG(MMC3_cmd);
}
static void M189Power(void)
{
EXPREGS[0]=EXPREGS[1]=0;
GenMMC3Power();
SetWriteHandler(0x4120,0x7FFF,M189Write);
}
void Mapper189_Init(CartInfo *info)
{
GenMMC3_Init(info, 256, 256, 0, 0);
pwrap=M189PW;
info->Power=M189Power;
AddExState(EXPREGS, 2, 0, "EXPR");
}