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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 |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r |
19 | */\r |
20 | \r |
21 | #include "mapinc.h"\r |
22 | \r |
23 | static uint8 reg;\r |
24 | \r |
25 | static uint8 *WRAM=NULL;\r |
26 | static uint32 WRAMSIZE;\r |
27 | \r |
28 | static SFORMAT StateRegs[]=\r |
29 | {\r |
30 | {®, 1, "REG"},\r |
31 | {0}\r |
32 | };\r |
33 | \r |
34 | static void Sync(void)\r |
35 | {\r |
36 | setchr8(0);\r |
37 | setprg8r(0x10,0x6000,0);\r |
38 | setprg32(0x8000,reg&0x1f);\r |
39 | setmirror(((reg&0x20)>>5)^1);\r |
40 | }\r |
41 | \r |
42 | static DECLFW(M177Write)\r |
43 | {\r |
44 | reg=V;\r |
45 | Sync();\r |
46 | }\r |
47 | \r |
48 | static void M177Power(void)\r |
49 | {\r |
50 | reg=0;\r |
51 | Sync(); \r |
52 | SetReadHandler(0x6000,0x7fff,CartBR);\r |
53 | SetWriteHandler(0x6000,0x7fff,CartBW);\r |
54 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
55 | SetWriteHandler(0x8000,0xFFFF,M177Write);\r |
56 | }\r |
57 | \r |
58 | static void M177Close(void)\r |
59 | {\r |
60 | if(WRAM)\r |
61 | FCEU_gfree(WRAM);\r |
62 | WRAM=NULL;\r |
63 | }\r |
64 | \r |
65 | static void StateRestore(int version)\r |
66 | {\r |
67 | Sync();\r |
68 | }\r |
69 | \r |
70 | void Mapper177_Init(CartInfo *info)\r |
71 | {\r |
72 | info->Power=M177Power;\r |
73 | info->Close=M177Close;\r |
74 | GameStateRestore=StateRestore;\r |
75 | \r |
76 | WRAMSIZE=8192;\r |
77 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
78 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
79 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
80 | if(info->battery)\r |
81 | {\r |
82 | info->SaveGame[0]=WRAM;\r |
83 | info->SaveGameLen[0]=WRAMSIZE;\r |
84 | }\r |
85 | \r |
86 | AddExState(&StateRegs, ~0, 0, 0);\r |
87 | }\r |