fceux/mappers/75.cpp

48 lines
1.4 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 map75sel mapbyte1[0]
#define map75ar mapbyte2
DECLFW(Mapper75_write)
{
switch(A&0xF000)
{
case 0x8000:ROM_BANK8(0x8000,V);break;
case 0x9000:
VROM_BANK4(0x0000,map75ar[0]|((V&2)<<3));
VROM_BANK4(0x1000,map75ar[1]|((V&4)<<2));
map75sel=V;MIRROR_SET(V&1);break;
case 0xa000:ROM_BANK8(0xa000,V);break;
case 0xc000:ROM_BANK8(0xc000,V);break;
case 0xe000:V&=0xF;map75ar[0]=V;V|=(map75sel&2)<<3;VROM_BANK4(0x0000,V);break;
case 0xf000:V&=0xF;map75ar[1]=V;V|=(map75sel&4)<<2;VROM_BANK4(0x1000,V);break;
}
}
void Mapper75_init(void)
{
SetWriteHandler(0x8000,0xffff,Mapper75_write);
}