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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 | #define K4buf mapbyte2 |
24 | |
25 | |
26 | |
27 | DECLFW(Mapper22_write) |
28 | { |
29 | if(A<=0xAFFF) |
30 | { |
31 | switch(A&0xF000) |
32 | { |
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33 | case 0x8000:ROM_BANK8(0x8000,V); |
34 | X6502_Rebase();break; |
35 | case 0xa000:ROM_BANK8(0xA000,V); |
36 | X6502_Rebase();break; |
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37 | case 0x9000:switch(V&3) |
38 | { |
39 | case 0x00:MIRROR_SET2(1);break; |
40 | case 0x01:MIRROR_SET2(0);break; |
41 | case 0x02:onemir(0);break; |
42 | case 0x03:onemir(1);break; |
43 | } |
44 | break; |
45 | } |
46 | } |
47 | else |
48 | { |
49 | A&=0xF003; |
50 | if(A>=0xb000 && A<=0xe003) |
51 | { |
52 | int x=(A&1)|((A-0xB000)>>11); |
53 | |
54 | K4buf[x]&=(0xF0)>>((A&2)<<1); |
55 | K4buf[x]|=(V&0xF)<<((A&2)<<1); |
56 | VROM_BANK1(x<<10,K4buf[x]>>1); |
57 | } |
58 | } |
59 | } |
60 | |
61 | |
62 | void Mapper22_init(void) |
63 | { |
64 | SetWriteHandler(0x8000,0xffff,Mapper22_write); |
65 | } |