fceux/mappers/32.cpp

54 lines
1.5 KiB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "mapinc.h"
#define IREMCon mapbyte1[0]
static DECLFW(Mapper32_write)
{
switch(A>>12)
{
case 0x8:
mapbyte1[1]=V;
if(IREMCon) {ROM_BANK8(0xc000,V);ROM_BANK8(0x8000,~1);}
else {ROM_BANK8(0x8000,V);ROM_BANK8(0xc000,~1);}
break;
case 0x9:IREMCon=(V>>1)&1;
if(IREMCon) {ROM_BANK8(0xc000,mapbyte1[1]);ROM_BANK8(0x8000,~1);}
else {ROM_BANK8(0x8000,mapbyte1[1]); ROM_BANK8(0xc000,~1);}
MIRROR_SET(V&1);
break;
case 0xa:ROM_BANK8(0xA000,V);
break;
}
if((A&0xF000)==0xb000)
VROM_BANK1((A&0x7)<<10,V);
}
void Mapper32_init(void)
{
ROM_BANK16(0x8000,0);
ROM_BANK16(0xc000,~0);
SetWriteHandler(0x8000,0xffff,Mapper32_write);
}