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1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
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4 | * Copyright (C) 2002 Xodnizel |
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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 |
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18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | * |
20 | * VRC-1 |
21 | * |
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22 | */ |
23 | |
24 | #include "mapinc.h" |
25 | |
26 | |
27 | #define map75sel mapbyte1[0] |
28 | #define map75ar mapbyte2 |
29 | |
30 | DECLFW(Mapper75_write) |
31 | { |
32 | switch(A&0xF000) |
33 | { |
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34 | case 0x8000:ROM_BANK8(0x8000,V);break; |
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35 | case 0x9000: |
36 | VROM_BANK4(0x0000,map75ar[0]|((V&2)<<3)); |
37 | VROM_BANK4(0x1000,map75ar[1]|((V&4)<<2)); |
38 | map75sel=V;MIRROR_SET(V&1);break; |
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39 | case 0xa000:ROM_BANK8(0xa000,V);break; |
40 | case 0xc000:ROM_BANK8(0xc000,V);break; |
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41 | case 0xe000:V&=0xF;map75ar[0]=V;V|=(map75sel&2)<<3;VROM_BANK4(0x0000,V);break; |
42 | case 0xf000:V&=0xF;map75ar[1]=V;V|=(map75sel&4)<<2;VROM_BANK4(0x1000,V);break; |
43 | } |
44 | } |
45 | |
46 | void Mapper75_init(void) |
47 | { |
48 | SetWriteHandler(0x8000,0xffff,Mapper75_write); |
49 | } |
50 | |