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1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 2005 CaH4e3\r |
5 | * Copyright (C) 2009 qeed\r |
6 | *\r |
7 | * This program is free software; you can redistribute it and/or modify\r |
8 | * it under the terms of the GNU General Public License as published by\r |
9 | * the Free Software Foundation; either version 2 of the License, or\r |
10 | * (at your option) any later version.\r |
11 | *\r |
12 | * This program is distributed in the hope that it will be useful,\r |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r |
15 | * GNU General Public License for more details.\r |
16 | *\r |
17 | * You should have received a copy of the GNU General Public License\r |
18 | * along with this program; if not, write to the Free Software\r |
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19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
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20 | *\r |
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21 | * BMC 42-in-1 "reset switch" + "select switch"\r |
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22 | *\r |
23 | */\r |
24 | \r |
25 | #include "mapinc.h"\r |
26 | \r |
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27 | static uint8 isresetbased = 0;\r |
28 | static uint8 latche[2], reset;\r |
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29 | static SFORMAT StateRegs[]=\r |
30 | {\r |
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31 | {&reset, 1, "RST"},\r |
32 | {latche, 2, "LATC"},\r |
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33 | {0}\r |
34 | };\r |
35 | \r |
36 | static void Sync(void)\r |
37 | {\r |
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38 | uint8 bank;\r |
39 | if(isresetbased)\r |
40 | bank = (latche[0]&0x1f)|(reset<<5)|((latche[1]&1)<<6);\r |
41 | else\r |
42 | bank = (latche[0]&0x1f)|((latche[0]&0x80)>>2)|((latche[1]&1)<<6);\r |
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43 | if(!(latche[0] & 0x20))\r |
44 | setprg32(0x8000,bank >> 1);\r |
45 | else\r |
46 | {\r |
47 | setprg16(0x8000,bank);\r |
48 | setprg16(0xC000,bank);\r |
49 | }\r |
50 | setmirror((latche[0]>>6)&1);\r |
51 | setchr8(0);\r |
52 | }\r |
53 | \r |
54 | static DECLFW(M226Write)\r |
55 | {\r |
56 | latche[A & 1] = V;\r |
57 | Sync();\r |
58 | }\r |
59 | \r |
60 | static void M226Power(void)\r |
61 | {\r |
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62 | latche[0] = latche[1] = reset = 0;\r |
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63 | Sync();\r |
64 | SetWriteHandler(0x8000,0xFFFF,M226Write);\r |
65 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
66 | }\r |
67 | \r |
68 | static void StateRestore(int version)\r |
69 | {\r |
70 | Sync();\r |
71 | }\r |
72 | \r |
73 | void Mapper226_Init(CartInfo *info)\r |
74 | {\r |
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75 | isresetbased = 0;\r |
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76 | info->Power=M226Power;\r |
77 | AddExState(&StateRegs, ~0, 0, 0);\r |
78 | GameStateRestore=StateRestore;\r |
79 | }\r |
80 | \r |
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81 | static void BMC42in1Reset(void)\r |
82 | {\r |
83 | reset ^= 1;\r |
84 | Sync();\r |
85 | }\r |
86 | \r |
87 | void BMC42in1r_Init(CartInfo *info)\r |
88 | {\r |
89 | isresetbased = 1;\r |
90 | info->Power=M226Power;\r |
91 | info->Reset=BMC42in1Reset;\r |
92 | AddExState(&StateRegs, ~0, 0, 0);\r |
93 | GameStateRestore=StateRestore;\r |
94 | }\r |