| 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r |
| 19 | *\r |
| 20 | * BMC 42-in-1 reset switch\r |
| 21 | */\r |
| 22 | \r |
| 23 | #include "mapinc.h"\r |
| 24 | \r |
| 25 | static uint8 regs[4];\r |
| 26 | \r |
| 27 | static SFORMAT StateRegs[]=\r |
| 28 | {\r |
| 29 | {regs, 4, "REGS"},\r |
| 30 | {0}\r |
| 31 | };\r |
| 32 | \r |
| 33 | static void Sync(void)\r |
| 34 | {\r |
| 35 | if(regs[0]&0x80)\r |
| 36 | {\r |
| 37 | if(regs[1]&0x80)\r |
| 38 | setprg32(0x8000,regs[1]&0x1F);\r |
| 39 | else\r |
| 40 | {\r |
| 41 | int bank=((regs[1]&0x1f)<<1)|((regs[1]>>6)&1);\r |
| 42 | setprg16(0x8000,bank);\r |
| 43 | setprg16(0xC000,bank);\r |
| 44 | }\r |
| 45 | }\r |
| 46 | else\r |
| 47 | {\r |
| 48 | int bank=((regs[1]&0x1f)<<1)|((regs[1]>>6)&1);\r |
| 49 | setprg16(0xC000,bank);\r |
| 50 | }\r |
| 51 | if(regs[0]&0x20)\r |
| 52 | setmirror(MI_H);\r |
| 53 | else\r |
| 54 | setmirror(MI_V);\r |
| 55 | setchr8((regs[2]<<2)|((regs[0]>>1)&3));\r |
| 56 | }\r |
| 57 | \r |
| 58 | static DECLFW(BMC64in1nrWriteLo)\r |
| 59 | {\r |
| 60 | regs[A&3]=V;\r |
| 61 | Sync();\r |
| 62 | }\r |
| 63 | \r |
| 64 | static DECLFW(BMC64in1nrWriteHi)\r |
| 65 | {\r |
| 66 | regs[3]=V;\r |
| 67 | Sync();\r |
| 68 | }\r |
| 69 | \r |
| 70 | static void BMC64in1nrPower(void)\r |
| 71 | {\r |
| 72 | regs[0]=0x80;\r |
| 73 | regs[1]=0x43;\r |
| 74 | regs[2]=regs[3]=0;\r |
| 75 | Sync();\r |
| 76 | SetWriteHandler(0x5000,0x5003,BMC64in1nrWriteLo);\r |
| 77 | SetWriteHandler(0x8000,0xFFFF,BMC64in1nrWriteHi);\r |
| 78 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 79 | }\r |
| 80 | \r |
| 81 | static void StateRestore(int version)\r |
| 82 | {\r |
| 83 | Sync();\r |
| 84 | }\r |
| 85 | \r |
| 86 | void BMC64in1nr_Init(CartInfo *info)\r |
| 87 | {\r |
| 88 | info->Power=BMC64in1nrPower;\r |
| 89 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 90 | GameStateRestore=StateRestore;\r |
| 91 | }\r |
| 92 | \r |
| 93 | \r |