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1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 2007 CaH4e3\r |
5 | *\r |
6 | * This program is free software; you can redistribute it and/or modify\r |
7 | * it under the terms of the GNU General Public License as published by\r |
8 | * the Free Software Foundation; either version 2 of the License, or\r |
9 | * (at your option) any later version.\r |
10 | *\r |
11 | * This program is distributed in the hope that it will be useful,\r |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r |
14 | * GNU General Public License for more details.\r |
15 | *\r |
16 | * You should have received a copy of the GNU General Public License\r |
17 | * along with this program; if not, write to the Free Software\r |
43725da7 |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
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19 | */\r |
20 | \r |
21 | #include "mapinc.h"\r |
22 | \r |
23 | static uint8 reg, delay, mirr;\r |
24 | \r |
25 | static SFORMAT StateRegs[]=\r |
26 | {\r |
27 | {®, 1, "REG"},\r |
28 | {&mirr, 1, "MIRR"},\r |
29 | {0}\r |
30 | };\r |
31 | \r |
32 | static void Sync(void)\r |
33 | {\r |
34 | setchr8(reg);\r |
35 | if(!delay)\r |
36 | {\r |
37 | setprg16(0x8000,reg);\r |
38 | setprg8(0xC000,reg << 1);\r |
39 | }\r |
40 | setprg8(0xE000,(reg << 1) + 1);\r |
41 | setmirror(((mirr&4)>>2)^1);\r |
42 | }\r |
43 | \r |
44 | static DECLFW(M175Write1)\r |
45 | {\r |
46 | mirr = V;\r |
47 | delay = 1;\r |
48 | Sync();\r |
49 | }\r |
50 | \r |
51 | static DECLFW(M175Write2)\r |
52 | {\r |
53 | reg = V & 0x0F;\r |
54 | delay = 1;\r |
55 | Sync();\r |
56 | }\r |
57 | \r |
58 | static DECLFR(M175Read)\r |
59 | {\r |
60 | if(A==0xFFFC)\r |
61 | {\r |
62 | delay = 0;\r |
63 | Sync();\r |
64 | }\r |
65 | return CartBR(A);\r |
66 | }\r |
67 | \r |
68 | static void M175Power(void)\r |
69 | {\r |
70 | reg = mirr = delay = 0;\r |
71 | SetReadHandler(0x8000,0xFFFF,M175Read);\r |
72 | SetWriteHandler(0x8000,0x8000,M175Write1);\r |
73 | SetWriteHandler(0xA000,0xA000,M175Write2);\r |
74 | Sync(); \r |
75 | }\r |
76 | \r |
77 | static void StateRestore(int version)\r |
78 | {\r |
79 | Sync();\r |
80 | }\r |
81 | \r |
82 | void Mapper175_Init(CartInfo *info)\r |
83 | {\r |
84 | info->Power=M175Power;\r |
85 | GameStateRestore=StateRestore;\r |
86 | \r |
87 | AddExState(&StateRegs, ~0, 0, 0);\r |
88 | }\r |