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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 |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | #include "mapinc.h" |
22 | |
23 | static DECLFW(Mapper228_write) |
24 | { |
25 | uint32 page,pagel,pageh; |
26 | |
27 | MIRROR_SET((A>>13)&1); |
28 | |
29 | page=(A>>7)&0x3F; |
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30 | //printf("%04x\n",A); |
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31 | if((page&0x30)==0x30) |
32 | page-=0x10; |
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33 | |
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34 | pagel=pageh=(page<<1) + (((A>>6)&1)&((A>>5)&1)); |
35 | pageh+=((A>>5)&1)^1; |
36 | |
37 | ROM_BANK16(0x8000,pagel); |
38 | ROM_BANK16(0xC000,pageh); |
39 | VROM_BANK8( (V&0x3) | ((A&0xF)<<2) ); |
40 | } |
41 | |
42 | static void A52Reset(void) |
43 | { |
44 | Mapper228_write(0,0); |
45 | } |
46 | |
47 | void Mapper228_init(void) |
48 | { |
49 | MapperReset=A52Reset; |
50 | A52Reset(); |
51 | SetWriteHandler(0x8000,0xffff,Mapper228_write); |
52 | } |
53 | |