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