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1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 2002 Xodnizel |
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 |
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19 | */ |
20 | |
21 | #include "mapinc.h" |
22 | |
23 | static uint8 cmd; |
24 | static uint8 DRegs[8]; |
25 | |
26 | static SFORMAT DEI_StateRegs[]= |
27 | { |
28 | {&cmd, 1, "CMD"}, |
29 | {DRegs, 8, "DREG"}, |
30 | {0} |
31 | }; |
32 | |
33 | static void Sync(void) |
34 | { |
35 | setchr2(0x0000,DRegs[0]); |
36 | setchr2(0x0800,DRegs[1]); |
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37 | int x; |
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38 | for(x=0;x<4;x++) |
39 | setchr1(0x1000+(x<<10),DRegs[2+x]); |
40 | setprg8(0x8000,DRegs[6]); |
41 | setprg8(0xa000,DRegs[7]); |
42 | } |
43 | |
44 | static void StateRestore(int version) |
45 | { |
46 | Sync(); |
47 | } |
48 | |
49 | static DECLFW(DEIWrite) |
50 | { |
51 | switch(A&0x8001) |
52 | { |
53 | case 0x8000: cmd=V&0x07; break; |
54 | case 0x8001: if(cmd<=0x05) |
55 | V&=0x3F; |
56 | else |
57 | V&=0x0F; |
58 | if(cmd<=0x01) V>>=1; |
59 | DRegs[cmd&0x07]=V; |
60 | Sync(); |
61 | break; |
62 | } |
63 | } |
64 | |
65 | static void DEIPower(void) |
66 | { |
67 | setprg8(0xc000,0xE); |
68 | setprg8(0xe000,0xF); |
69 | cmd=0; |
70 | memset(DRegs,0,8); |
71 | Sync(); |
72 | SetReadHandler(0x8000,0xFFFF,CartBR); |
73 | SetWriteHandler(0x8000,0xFFFF,DEIWrite); |
74 | } |
75 | |
76 | |
77 | void DEIROM_Init(CartInfo *info) |
78 | { |
79 | info->Power=DEIPower; |
80 | GameStateRestore=StateRestore; |
81 | AddExState(&DEI_StateRegs, ~0, 0, 0); |
82 | } |