| 1 | /* FCE Ultra - NES/Famicom Emulator\r |
| 2 | *\r |
| 3 | * Copyright notice for this file:\r |
| 4 | * Copyright (C) 2007 CaH4e3\r |
| 5 | * Copyright (C) 2012 FCEUX team\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 |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r |
| 20 | */\r |
| 21 | \r |
| 22 | #include "mapinc.h"\r |
| 23 | \r |
| 24 | extern uint32 ROM_size;\r |
| 25 | \r |
| 26 | static uint8 prg[4], chr, sbw, we_sram;\r |
| 27 | static uint8 *WRAM=NULL;\r |
| 28 | static uint32 WRAMSIZE;\r |
| 29 | \r |
| 30 | static SFORMAT StateRegs[]=\r |
| 31 | {\r |
| 32 | {prg, 4, "PRG"},\r |
| 33 | {&chr, 1, "CHR"},\r |
| 34 | {&sbw, 1, "SBW"},\r |
| 35 | {0}\r |
| 36 | };\r |
| 37 | \r |
| 38 | static void Sync(void)\r |
| 39 | {\r |
| 40 | setprg8r(0x10,0x6000,0);\r |
| 41 | setprg8(0x8000,prg[0]);\r |
| 42 | setprg8(0xA000,prg[1]);\r |
| 43 | setprg8(0xC000,prg[2]);\r |
| 44 | setprg8(0xE000,prg[3]);\r |
| 45 | \r |
| 46 | setchr8(chr);\r |
| 47 | }\r |
| 48 | \r |
| 49 | static DECLFW(M176Write_5001)\r |
| 50 | { \r |
| 51 | printf("%04X = $%02X\n",A,V);\r |
| 52 | if(sbw)\r |
| 53 | {\r |
| 54 | prg[0] = V*4;\r |
| 55 | prg[1] = V*4+1;\r |
| 56 | prg[2] = V*4+2;\r |
| 57 | prg[3] = V*4+3;\r |
| 58 | }\r |
| 59 | Sync();\r |
| 60 | }\r |
| 61 | \r |
| 62 | static DECLFW(M176Write_5010)\r |
| 63 | { \r |
| 64 | printf("%04X = $%02X\n",A,V);\r |
| 65 | if(V == 0x24) sbw = 1;\r |
| 66 | Sync();\r |
| 67 | }\r |
| 68 | \r |
| 69 | static DECLFW(M176Write_5011)\r |
| 70 | { \r |
| 71 | printf("%04X = $%02X\n",A,V);\r |
| 72 | V >>= 1;\r |
| 73 | if(sbw)\r |
| 74 | {\r |
| 75 | prg[0] = V*4;\r |
| 76 | prg[1] = V*4+1;\r |
| 77 | prg[2] = V*4+2;\r |
| 78 | prg[3] = V*4+3;\r |
| 79 | }\r |
| 80 | Sync();\r |
| 81 | }\r |
| 82 | \r |
| 83 | static DECLFW(M176Write_5FF1)\r |
| 84 | { \r |
| 85 | printf("%04X = $%02X\n",A,V);\r |
| 86 | V >>= 1;\r |
| 87 | prg[0] = V*4;\r |
| 88 | prg[1] = V*4+1;\r |
| 89 | prg[2] = V*4+2;\r |
| 90 | prg[3] = V*4+3;\r |
| 91 | Sync();\r |
| 92 | }\r |
| 93 | \r |
| 94 | static DECLFW(M176Write_5FF2)\r |
| 95 | { \r |
| 96 | printf("%04X = $%02X\n",A,V);\r |
| 97 | chr = V;\r |
| 98 | Sync();\r |
| 99 | }\r |
| 100 | \r |
| 101 | static DECLFW(M176Write_A001)\r |
| 102 | {\r |
| 103 | we_sram = V & 0x03;\r |
| 104 | }\r |
| 105 | \r |
| 106 | static DECLFW(M176Write_WriteSRAM)\r |
| 107 | {\r |
| 108 | // if(we_sram)\r |
| 109 | CartBW(A,V);\r |
| 110 | }\r |
| 111 | \r |
| 112 | static void M176Power(void)\r |
| 113 | {\r |
| 114 | SetReadHandler(0x6000,0x7fff,CartBR);\r |
| 115 | SetWriteHandler(0x6000,0x7fff,M176Write_WriteSRAM);\r |
| 116 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 117 | SetWriteHandler(0xA001,0xA001,M176Write_A001);\r |
| 118 | SetWriteHandler(0x5001,0x5001,M176Write_5001);\r |
| 119 | SetWriteHandler(0x5010,0x5010,M176Write_5010);\r |
| 120 | SetWriteHandler(0x5011,0x5011,M176Write_5011);\r |
| 121 | SetWriteHandler(0x5ff1,0x5ff1,M176Write_5FF1);\r |
| 122 | SetWriteHandler(0x5ff2,0x5ff2,M176Write_5FF2);\r |
| 123 | \r |
| 124 | we_sram = 0;\r |
| 125 | sbw = 0;\r |
| 126 | prg[0] = 0;\r |
| 127 | prg[1] = 1;\r |
| 128 | prg[2] = (ROM_size-2)&63;\r |
| 129 | prg[3] = (ROM_size-1)&63;\r |
| 130 | Sync();\r |
| 131 | }\r |
| 132 | \r |
| 133 | \r |
| 134 | static void M176Close(void)\r |
| 135 | {\r |
| 136 | if(WRAM)\r |
| 137 | FCEU_gfree(WRAM);\r |
| 138 | WRAM=NULL;\r |
| 139 | }\r |
| 140 | \r |
| 141 | static void StateRestore(int version)\r |
| 142 | {\r |
| 143 | Sync();\r |
| 144 | }\r |
| 145 | \r |
| 146 | void Mapper176_Init(CartInfo *info)\r |
| 147 | {\r |
| 148 | info->Power=M176Power;\r |
| 149 | info->Close=M176Close;\r |
| 150 | \r |
| 151 | GameStateRestore=StateRestore;\r |
| 152 | \r |
| 153 | WRAMSIZE=8192;\r |
| 154 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
| 155 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
| 156 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
| 157 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 158 | }\r |