mirror of
https://github.com/dborth/fceugx.git
synced 2024-12-27 00:51:53 +01:00
68 lines
1.7 KiB
C
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(0x5800,0x5FFF,Mapper255_wl);
|
|
SetWriteHandler(0x8000,0xffff,Mapper255_write);
|
|
SetReadHandler(0x5800,0x5FFF,Mapper255_read);
|
|
}
|