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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 | * Family Study Box by Fukutake Shoten |
21 | */ |
22 | |
23 | #include "mapinc.h" |
24 | |
25 | static uint8 SWRAM[2816]; |
26 | static uint8 *WRAM=NULL; |
27 | static uint8 regs[4]; |
28 | |
29 | static SFORMAT StateRegs[]= |
30 | { |
31 | {regs, 4, "DREG"}, |
32 | {SWRAM, 2816, "SWRAM"}, |
33 | {0} |
34 | }; |
35 | |
36 | static void Sync(void) |
37 | { |
38 | setprg8r(0x10,0x6000,regs[0]>>6); |
39 | setprg16(0x8000,regs[1]); |
40 | setprg16(0xc000,0); |
41 | } |
42 | |
43 | static DECLFW(M186Write) |
44 | { |
45 | if(A&0x4203) regs[A&3]=V; |
46 | Sync(); |
47 | } |
48 | |
49 | static DECLFR(M186Read) |
50 | { |
51 | switch(A) |
52 | { |
53 | case 0x4200: return 0x00; break; |
54 | case 0x4201: return 0x00; break; |
55 | case 0x4202: return 0x40; break; |
56 | case 0x4203: return 0x00; break; |
57 | } |
58 | return 0xFF; |
59 | } |
60 | |
61 | static DECLFR(ASWRAM) |
62 | { |
63 | return(SWRAM[A-0x4400]); |
64 | } |
65 | static DECLFW(BSWRAM) |
66 | { |
67 | SWRAM[A-0x4400]=V; |
68 | } |
69 | |
70 | static void M186Power(void) |
71 | { |
72 | setchr8(0); |
73 | SetReadHandler(0x6000,0xFFFF,CartBR); |
74 | SetWriteHandler(0x6000,0xFFFF,CartBW); |
75 | SetReadHandler(0x4200,0x43FF,M186Read); |
76 | SetWriteHandler(0x4200,0x43FF,M186Write); |
77 | SetReadHandler(0x4400,0x4EFF,ASWRAM); |
78 | SetWriteHandler(0x4400,0x4EFF,BSWRAM); |
79 | regs[0]=regs[1]=regs[2]=regs[3]; |
80 | Sync(); |
81 | } |
82 | |
83 | static void M186Close(void) |
84 | { |
85 | if(WRAM) |
86 | FCEU_gfree(WRAM); |
87 | WRAM=NULL; |
88 | } |
89 | |
90 | static void M186Restore(int version) |
91 | { |
92 | Sync(); |
93 | } |
94 | |
95 | void Mapper186_Init(CartInfo *info) |
96 | { |
97 | info->Power=M186Power; |
98 | info->Close=M186Close; |
99 | GameStateRestore=M186Restore; |
100 | WRAM=(uint8*)FCEU_gmalloc(32384); |
101 | SetupCartPRGMapping(0x10,WRAM,32384,1); |
102 | AddExState(WRAM, 32384, 0, "WRAM"); |
103 | AddExState(StateRegs, ~0, 0, 0); |
104 | } |