mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 06:55:05 +01:00
58 lines
1.3 KiB
C++
58 lines
1.3 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 calreg mapbyte1[0]
|
|
#define calchr mapbyte1[1]
|
|
|
|
DECLFW(Mapper41_write)
|
|
{
|
|
if(A<0x8000)
|
|
{
|
|
ROM_BANK32(A&7);
|
|
MIRROR_SET((A>>5)&1);
|
|
calreg=A;
|
|
calchr&=0x3;
|
|
calchr|=(A>>1)&0xC;
|
|
VROM_BANK8(calchr);
|
|
}
|
|
else if(calreg&0x4)
|
|
{
|
|
calchr&=0xC;
|
|
calchr|=A&3;
|
|
VROM_BANK8(calchr);
|
|
}
|
|
}
|
|
|
|
static void M41Reset(void)
|
|
{
|
|
calreg=calchr=0;
|
|
}
|
|
|
|
void Mapper41_init(void)
|
|
{
|
|
MapperReset=M41Reset;
|
|
ROM_BANK32(0);
|
|
SetWriteHandler(0x8000,0xffff,Mapper41_write);
|
|
SetWriteHandler(0x6000,0x67ff,Mapper41_write);
|
|
}
|