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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 | * Many-in-one hacked mapper crap.\r |
21 | * \r |
22 | * Original BNROM is actually AxROM variations without mirroring control,\r |
23 | * and haven't SRAM on-board, so it must be removed from here\r |
24 | *\r |
25 | * Difficult banking is what NINA board doing, most hacks for 34 mapper are\r |
26 | * NINA hacks, so this is actually 34 mapper\r |
27 | *\r |
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28 | */\r |
29 | \r |
30 | #include "mapinc.h"\r |
31 | \r |
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32 | static uint8 regs[3];\r |
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33 | static uint8 *WRAM=NULL;\r |
34 | static uint32 WRAMSIZE;\r |
35 | \r |
36 | static SFORMAT StateRegs[]=\r |
37 | {\r |
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38 | {regs, 3, "REGS"},\r |
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39 | {0}\r |
40 | };\r |
41 | \r |
42 | static void Sync(void)\r |
43 | {\r |
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44 | setprg8r(0x10,0x6000,0);\r |
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45 | setprg32(0x8000,regs[0]);\r |
46 | setchr4(0x0000,regs[1]); \r |
47 | setchr4(0x1000,regs[2]); \r |
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48 | }\r |
49 | \r |
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50 | static DECLFW(M34Write)\r |
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51 | {\r |
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52 | if(A>=0x8000)\r |
53 | regs[0] = V;\r |
54 | else\r |
55 | switch(A)\r |
56 | {\r |
57 | case 0x7ffd: regs[0] = V; break;\r |
58 | case 0x7ffe: regs[1] = V; break;\r |
59 | case 0x7fff: regs[2] = V; break;\r |
60 | }\r |
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61 | Sync();\r |
62 | }\r |
63 | \r |
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64 | static void M34Power(void)\r |
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65 | {\r |
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66 | regs[0] = 0;\r |
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67 | Sync();\r |
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68 | SetReadHandler(0x6000,0x7ffc,CartBR);\r |
69 | SetWriteHandler(0x6000,0x7ffc,CartBW);\r |
70 | SetReadHandler(0x8000,0xffff,CartBR);\r |
71 | SetWriteHandler(0x7ffd,0xffff,M34Write);\r |
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72 | }\r |
73 | \r |
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74 | static void M34Close(void)\r |
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75 | {\r |
76 | if(WRAM)\r |
77 | FCEU_gfree(WRAM);\r |
78 | WRAM=NULL;\r |
79 | }\r |
80 | \r |
81 | static void StateRestore(int version)\r |
82 | {\r |
83 | Sync();\r |
84 | }\r |
85 | \r |
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86 | void Mapper34_Init(CartInfo *info)\r |
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87 | {\r |
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88 | info->Power=M34Power;\r |
89 | info->Close=M34Close;\r |
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90 | GameStateRestore=StateRestore;\r |
91 | \r |
92 | WRAMSIZE=8192;\r |
93 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
94 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
95 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
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96 | \r |
97 | AddExState(&StateRegs, ~0, 0, 0);\r |
98 | }\r |