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1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
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4 | * Copyright (C) 2012 CaH4e3\r |
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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 |
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18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
19 | *\r |
20 | * Taito X1-017 board, battery backed\r |
21 | *\r |
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22 | */\r |
23 | \r |
24 | #include "mapinc.h"\r |
25 | \r |
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26 | static uint8 regs[9], ctrl;\r |
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27 | static uint8 *WRAM=NULL;\r |
28 | static uint32 WRAMSIZE;\r |
29 | \r |
30 | static SFORMAT StateRegs[]=\r |
31 | {\r |
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32 | {regs, 9, "REGS"},\r |
33 | {&ctrl, 1, "CTRL"},\r |
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34 | {0}\r |
35 | };\r |
36 | \r |
37 | static void Sync(void)\r |
38 | {\r |
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39 | uint32 swap = ((ctrl & 2) << 11);\r |
40 | setchr2(0x0000^swap,regs[0]>>1); \r |
41 | setchr2(0x0800^swap,regs[1]>>1); \r |
42 | setchr1(0x1000^swap,regs[2]); \r |
43 | setchr1(0x1400^swap,regs[3]); \r |
44 | setchr1(0x1800^swap,regs[4]); \r |
45 | setchr1(0x1c00^swap,regs[5]); \r |
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46 | setprg8r(0x10,0x6000,0);\r |
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47 | setprg8(0x8000,regs[6]);\r |
48 | setprg8(0xA000,regs[7]);\r |
49 | setprg8(0xC000,regs[8]);\r |
50 | setprg8(0xE000,~0);\r |
51 | setmirror(ctrl & 1);\r |
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52 | }\r |
53 | \r |
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54 | static DECLFW(M82Write)\r |
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55 | {\r |
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56 | if(A <= 0x7ef5)\r |
57 | regs[A & 7] = V;\r |
58 | else\r |
59 | switch(A)\r |
60 | {\r |
61 | case 0x7ef6: ctrl = V & 3; break;\r |
62 | case 0x7efa: regs[6] = V >> 2; break;\r |
63 | case 0x7efb: regs[7] = V >> 2; break;\r |
64 | case 0x7efc: regs[8] = V >> 2; break;\r |
65 | }\r |
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66 | Sync();\r |
67 | }\r |
68 | \r |
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69 | static void M82Power(void)\r |
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70 | {\r |
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71 | Sync();\r |
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72 | SetReadHandler(0x6000,0xffff,CartBR);\r |
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73 | SetWriteHandler(0x6000,0x7fff,CartBW);\r |
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74 | SetWriteHandler(0x7ef0,0x7efc,M82Write); // external WRAM might end at $73FF\r |
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75 | }\r |
76 | \r |
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77 | static void M82Close(void)\r |
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78 | {\r |
79 | if(WRAM)\r |
80 | FCEU_gfree(WRAM);\r |
81 | WRAM=NULL;\r |
82 | }\r |
83 | \r |
84 | static void StateRestore(int version)\r |
85 | {\r |
86 | Sync();\r |
87 | }\r |
88 | \r |
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89 | void Mapper82_Init(CartInfo *info)\r |
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90 | {\r |
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91 | info->Power=M82Power;\r |
92 | info->Power=M82Close;\r |
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93 | \r |
94 | WRAMSIZE=8192;\r |
95 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
96 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
97 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
98 | if(info->battery)\r |
99 | {\r |
100 | info->SaveGame[0]=WRAM;\r |
101 | info->SaveGameLen[0]=WRAMSIZE;\r |
102 | }\r |
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103 | GameStateRestore=StateRestore;\r |
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104 | AddExState(&StateRegs, ~0, 0, 0);\r |
105 | }\r |