| 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[3];\r |
| 24 | static uint8 *WRAM=NULL;\r |
| 25 | static uint32 WRAMSIZE;\r |
| 26 | \r |
| 27 | static SFORMAT StateRegs[]=\r |
| 28 | {\r |
| 29 | {reg, 3, "REGS"},\r |
| 30 | {0}\r |
| 31 | };\r |
| 32 | \r |
| 33 | static void Sync(void)\r |
| 34 | {\r |
| 35 | setmirror(reg[0]);\r |
| 36 | setprg8r(0x10,0x6000,0);\r |
| 37 | setchr8(0);\r |
| 38 | setprg32(0x8000,(reg[1]+reg[2]));\r |
| 39 | }\r |
| 40 | \r |
| 41 | static DECLFW(M178Write0)\r |
| 42 | {\r |
| 43 | reg[0]=(V&1)^1;\r |
| 44 | Sync();\r |
| 45 | }\r |
| 46 | \r |
| 47 | static DECLFW(M178Write1)\r |
| 48 | {\r |
| 49 | reg[1]=(V>>1)&0xf;\r |
| 50 | Sync();\r |
| 51 | }\r |
| 52 | \r |
| 53 | static DECLFW(M178Write2)\r |
| 54 | {\r |
| 55 | reg[2]=(V<<2);\r |
| 56 | Sync();\r |
| 57 | }\r |
| 58 | \r |
| 59 | static void M178Power(void)\r |
| 60 | {\r |
| 61 | reg[0]=1; reg[1]=0; reg[2]=0;\r |
| 62 | Sync();\r |
| 63 | SetReadHandler(0x6000,0x7FFF,CartBR);\r |
| 64 | SetWriteHandler(0x6000,0x7FFF,CartBW);\r |
| 65 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 66 | SetWriteHandler(0x4800,0x4800,M178Write0);\r |
| 67 | SetWriteHandler(0x4801,0x4801,M178Write1);\r |
| 68 | SetWriteHandler(0x4802,0x4802,M178Write2);\r |
| 69 | }\r |
| 70 | \r |
| 71 | static void M178Close(void)\r |
| 72 | {\r |
| 73 | if(WRAM)\r |
| 74 | FCEU_gfree(WRAM);\r |
| 75 | WRAM=NULL;\r |
| 76 | }\r |
| 77 | \r |
| 78 | \r |
| 79 | static void StateRestore(int version)\r |
| 80 | {\r |
| 81 | Sync();\r |
| 82 | }\r |
| 83 | \r |
| 84 | void Mapper178_Init(CartInfo *info)\r |
| 85 | {\r |
| 86 | info->Power=M178Power;\r |
| 87 | info->Close=M178Close;\r |
| 88 | GameStateRestore=StateRestore;\r |
| 89 | \r |
| 90 | WRAMSIZE=8192;\r |
| 91 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
| 92 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
| 93 | if(info->battery)\r |
| 94 | {\r |
| 95 | info->SaveGame[0]=WRAM;\r |
| 96 | info->SaveGameLen[0]=WRAMSIZE;\r |
| 97 | }\r |
| 98 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
| 99 | \r |
| 100 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 101 | }\r |