c62d2810 |
1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 2002 Ben Parnell |
5 | * |
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. |
10 | * |
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. |
15 | * |
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 |
19 | */ |
20 | |
21 | #include "mapinc.h" |
22 | |
23 | |
24 | #define map75sel mapbyte1[0] |
25 | #define map75ar mapbyte2 |
26 | |
27 | DECLFW(Mapper75_write) |
28 | { |
29 | switch(A&0xF000) |
30 | { |
31 | case 0x8000:ROM_BANK8(0x8000,V);break; |
32 | case 0x9000: |
33 | VROM_BANK4(0x0000,map75ar[0]|((V&2)<<3)); |
34 | VROM_BANK4(0x1000,map75ar[1]|((V&4)<<2)); |
35 | map75sel=V;MIRROR_SET(V&1);break; |
36 | case 0xa000:ROM_BANK8(0xa000,V);break; |
37 | case 0xc000:ROM_BANK8(0xc000,V);break; |
38 | case 0xe000:V&=0xF;map75ar[0]=V;V|=(map75sel&2)<<3;VROM_BANK4(0x0000,V);break; |
39 | case 0xf000:V&=0xF;map75ar[1]=V;V|=(map75sel&4)<<2;VROM_BANK4(0x1000,V);break; |
40 | } |
41 | } |
42 | |
43 | void Mapper75_init(void) |
44 | { |
45 | SetWriteHandler(0x8000,0xffff,Mapper75_write); |
46 | } |
47 | |