1 /* FCE Ultra - NES/Famicom Emulator
3 * Copyright notice for this file:
4 * Copyright (C) 2002 Xodnizel
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #define K4buf mapbyte2
28 DECLFW(Mapper22_write)
34 case 0x8000:ROM_BANK8(0x8000,V);break;
35 case 0xa000:ROM_BANK8(0xA000,V);break;
36 case 0x9000:switch(V&3)
38 case 0x00:MIRROR_SET2(1);break;
39 case 0x01:MIRROR_SET2(0);break;
40 case 0x02:onemir(0);break;
41 case 0x03:onemir(1);break;
49 if(A>=0xb000 && A<=0xe003)
51 int x=(A&1)|((A-0xB000)>>11);
53 K4buf[x]&=(0xF0)>>((A&2)<<1);
54 K4buf[x]|=(V&0xF)<<((A&2)<<1);
55 VROM_BANK1(x<<10,K4buf[x]>>1);
61 void Mapper22_init(void)
63 SetWriteHandler(0x8000,0xffff,Mapper22_write);