| 1 | /* FCE Ultra - NES/Famicom Emulator\r |
| 2 | *\r |
| 3 | * Copyright notice for this file:\r |
| 4 | * Copyright (C) 2005 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
| 19 | */\r |
| 20 | \r |
| 21 | #include "mapinc.h"\r |
| 22 | \r |
| 23 | static uint16 cmdreg;\r |
| 24 | static SFORMAT StateRegs[]=\r |
| 25 | {\r |
| 26 | {&cmdreg, 2, "CREG"},\r |
| 27 | {0}\r |
| 28 | };\r |
| 29 | \r |
| 30 | static void Sync(void)\r |
| 31 | {\r |
| 32 | if(cmdreg&0x400)\r |
| 33 | setmirror(MI_0);\r |
| 34 | else\r |
| 35 | setmirror(((cmdreg>>13)&1)^1);\r |
| 36 | if(cmdreg&0x800)\r |
| 37 | {\r |
| 38 | setprg16(0x8000,((cmdreg&0x300)>>3)|((cmdreg&0x1F)<<1)|((cmdreg>>12)&1));\r |
| 39 | setprg16(0xC000,((cmdreg&0x300)>>3)|((cmdreg&0x1F)<<1)|((cmdreg>>12)&1));\r |
| 40 | }\r |
| 41 | else\r |
| 42 | setprg32(0x8000,((cmdreg&0x300)>>4)|(cmdreg&0x1F));\r |
| 43 | }\r |
| 44 | \r |
| 45 | static DECLFW(M235Write)\r |
| 46 | {\r |
| 47 | cmdreg=A;\r |
| 48 | Sync();\r |
| 49 | }\r |
| 50 | \r |
| 51 | static void M235Power(void)\r |
| 52 | {\r |
| 53 | setchr8(0);\r |
| 54 | SetWriteHandler(0x8000,0xFFFF,M235Write);\r |
| 55 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 56 | cmdreg=0;\r |
| 57 | Sync();\r |
| 58 | }\r |
| 59 | \r |
| 60 | static void M235Restore(int version)\r |
| 61 | {\r |
| 62 | Sync();\r |
| 63 | }\r |
| 64 | \r |
| 65 | void Mapper235_Init(CartInfo *info)\r |
| 66 | {\r |
| 67 | info->Power=M235Power;\r |
| 68 | GameStateRestore=M235Restore;\r |
| 69 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 70 | }\r |