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1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 2005 CaH4e3 |
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 | * BMC 42-in-1 reset switch |
21 | */ |
22 | |
23 | #include "mapinc.h" |
24 | |
25 | static uint8 regs[4]; |
26 | |
27 | static SFORMAT StateRegs[]= |
28 | { |
29 | {regs, 4, "REGS"}, |
30 | {0} |
31 | }; |
32 | |
33 | static void Sync(void) |
34 | { |
35 | if(regs[0]&0x80) |
36 | { |
37 | if(regs[1]&0x80) |
38 | setprg32(0x8000,regs[1]&0x1F); |
39 | else |
40 | { |
41 | int bank=((regs[1]&0x1f)<<1)|((regs[1]>>6)&1); |
42 | setprg16(0x8000,bank); |
43 | setprg16(0xC000,bank); |
44 | } |
45 | } |
46 | else |
47 | { |
48 | int bank=((regs[1]&0x1f)<<1)|((regs[1]>>6)&1); |
49 | setprg16(0xC000,bank); |
50 | } |
51 | if(regs[0]&0x20) |
52 | setmirror(MI_H); |
53 | else |
54 | setmirror(MI_V); |
55 | setchr8((regs[2]<<2)|((regs[0]>>1)&3)); |
56 | } |
57 | |
58 | static DECLFW(BMC64in1nrWriteLo) |
59 | { |
60 | regs[A&3]=V; |
61 | Sync(); |
62 | } |
63 | |
64 | static DECLFW(BMC64in1nrWriteHi) |
65 | { |
66 | regs[3]=V; |
67 | Sync(); |
68 | } |
69 | |
70 | static void BMC64in1nrPower(void) |
71 | { |
72 | regs[0]=0x80; |
73 | regs[1]=0x43; |
74 | regs[2]=regs[3]=0; |
75 | Sync(); |
76 | SetWriteHandler(0x5000,0x5003,BMC64in1nrWriteLo); |
77 | SetWriteHandler(0x8000,0xFFFF,BMC64in1nrWriteHi); |
78 | SetReadHandler(0x8000,0xFFFF,CartBR); |
79 | } |
80 | |
81 | static void StateRestore(int version) |
82 | { |
83 | Sync(); |
84 | } |
85 | |
86 | void BMC64in1nr_Init(CartInfo *info) |
87 | { |
88 | info->Power=BMC64in1nrPower; |
89 | AddExState(&StateRegs, ~0, 0, 0); |
90 | GameStateRestore=StateRestore; |
91 | } |
92 | |
93 | |