| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2005 CaH4e3 |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #include "mapinc.h" |
| 22 | |
| 23 | static uint16 cmdreg; |
| 24 | static SFORMAT StateRegs[]= |
| 25 | { |
| 26 | {&cmdreg, 2, "CMDREG"}, |
| 27 | {0} |
| 28 | }; |
| 29 | |
| 30 | static void Sync(void) |
| 31 | { |
| 32 | if(cmdreg&0x400) |
| 33 | setmirror(MI_0); |
| 34 | else |
| 35 | setmirror(((cmdreg>>13)&1)^1); |
| 36 | if(cmdreg&0x800) |
| 37 | { |
| 38 | setprg16(0x8000,((cmdreg&0x300)>>3)|((cmdreg&0x1F)<<1)|((cmdreg>>12)&1)); |
| 39 | setprg16(0xC000,((cmdreg&0x300)>>3)|((cmdreg&0x1F)<<1)|((cmdreg>>12)&1)); |
| 40 | } |
| 41 | else |
| 42 | setprg32(0x8000,((cmdreg&0x300)>>4)|(cmdreg&0x1F)); |
| 43 | } |
| 44 | |
| 45 | static DECLFW(M235Write) |
| 46 | { |
| 47 | cmdreg=A; |
| 48 | Sync(); |
| 49 | } |
| 50 | |
| 51 | static void M235Power(void) |
| 52 | { |
| 53 | setchr8(0); |
| 54 | SetWriteHandler(0x8000,0xFFFF,M235Write); |
| 55 | SetReadHandler(0x8000,0xFFFF,CartBR); |
| 56 | cmdreg=0; |
| 57 | Sync(); |
| 58 | } |
| 59 | |
| 60 | static void M235Restore(int version) |
| 61 | { |
| 62 | Sync(); |
| 63 | } |
| 64 | |
| 65 | void Mapper235_Init(CartInfo *info) |
| 66 | { |
| 67 | info->Power=M235Power; |
| 68 | GameStateRestore=M235Restore; |
| 69 | AddExState(&StateRegs, ~0, 0, 0); |
| 70 | } |