fceux/boards/235.cpp

71 lines
1.7 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"
static uint16 cmdreg;
static SFORMAT StateRegs[]=
{
{&cmdreg, 2, "CMDREG"},
{0}
};
static void Sync(void)
{
if(cmdreg&0x400)
setmirror(MI_0);
else
setmirror(((cmdreg>>13)&1)^1);
if(cmdreg&0x800)
{
setprg16(0x8000,((cmdreg&0x300)>>3)|((cmdreg&0x1F)<<1)|((cmdreg>>12)&1));
setprg16(0xC000,((cmdreg&0x300)>>3)|((cmdreg&0x1F)<<1)|((cmdreg>>12)&1));
}
else
setprg32(0x8000,((cmdreg&0x300)>>4)|(cmdreg&0x1F));
}
static DECLFW(M235Write)
{
cmdreg=A;
Sync();
}
static void M235Power(void)
{
setchr8(0);
SetWriteHandler(0x8000,0xFFFF,M235Write);
SetReadHandler(0x8000,0xFFFF,CartBR);
cmdreg=0;
Sync();
}
static void M235Restore(int version)
{
Sync();
}
void Mapper235_Init(CartInfo *info)
{
info->Power=M235Power;
GameStateRestore=M235Restore;
AddExState(&StateRegs, ~0, 0, 0);
}