fceux/mappers/255.cpp

68 lines
1.7 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"
static DECLFW(Mapper255_write)
{
uint32 pbank=(A>>7)&0x1F;
uint32 cbank=A&0x3F;
uint32 rbank=(A>>14)&1;
// printf("$%04x:$%02x\n",A,V);
// printf("%2x:%2x:%2x,%2x\n",pbank,cbank,rbank,(A&0x40)>>6);
if(A&0x1000)
{
ROM_BANK16(0x8000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6));
ROM_BANK16(0xc000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6));
}
else
{
ROM_BANK32(pbank|(rbank<<5));
}
MIRROR_SET((A>>13)&1);
VROM_BANK8((rbank<<6)|cbank);
}
static DECLFW(Mapper255_wl)
{
// printf("Wr: $%04x:$%02x\n",A,V);
mapbyte1[A&3]=V&0xF;
}
static DECLFR(Mapper255_read)
{
//printf("Rd: $%04x\n",A);
return(mapbyte1[A&3]); //|(X.DB&0xF0));
}
void Mapper255_init(void)
{
mapbyte1[0]=mapbyte1[1]=0xF;
ROM_BANK32(0);
VROM_BANK8(0);
SetWriteHandler(0x5800,0x5FF0,Mapper255_wl);
SetWriteHandler(0x8000,0xffff,Mapper255_write);
SetReadHandler(0x5800,0x5FFF,Mapper255_read);
}