e2d0dd92 |
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 | |
21 | #include "mapinc.h" |
22 | |
23 | static uint16 addrreg; |
24 | static uint8 datareg; |
25 | static uint8 busy; |
26 | static SFORMAT StateRegs[]= |
27 | { |
28 | {&addrreg, 2, "ADDRREG"}, |
29 | {&datareg, 1, "DATAREG"}, |
30 | {&busy, 1, "BUSY"}, |
31 | {0} |
32 | }; |
33 | |
34 | static void Sync(void) |
35 | { |
36 | setprg16(0x8000,(datareg&7)|((addrreg&0x60)>>2)|((addrreg&0x100)>>3)); |
37 | setprg16(0xC000,7|((addrreg&0x60)>>2)|((addrreg&0x100)>>3)); |
38 | setmirror(((addrreg&2)>>1)^1); |
39 | } |
40 | |
41 | static DECLFW(BMCT262Write) |
42 | { |
43 | if(busy||(A==0x8000)) |
44 | datareg=V; |
45 | else |
46 | { |
47 | addrreg=A; |
48 | busy=1; |
49 | } |
50 | Sync(); |
51 | } |
52 | |
53 | static void BMCT262Power(void) |
54 | { |
55 | setchr8(0); |
56 | SetWriteHandler(0x8000,0xFFFF,BMCT262Write); |
57 | SetReadHandler(0x8000,0xFFFF,CartBR); |
58 | busy=0; |
59 | addrreg=0; |
60 | datareg=0; |
61 | Sync(); |
62 | } |
63 | |
64 | static void BMCT262Reset(void) |
65 | { |
66 | busy=0; |
67 | addrreg=0; |
68 | datareg=0; |
69 | Sync(); |
70 | } |
71 | |
72 | static void BMCT262Restore(int version) |
73 | { |
74 | Sync(); |
75 | } |
76 | |
77 | void BMCT262_Init(CartInfo *info) |
78 | { |
79 | info->Power=BMCT262Power; |
80 | info->Reset=BMCT262Reset; |
81 | GameStateRestore=BMCT262Restore; |
82 | AddExState(&StateRegs, ~0, 0, 0); |
83 | } |