| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Xodnizel |
| 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 | extern uint32 ROM_size; |
| 24 | static uint8 latche; |
| 25 | |
| 26 | static void Sync(void) |
| 27 | { |
| 28 | if(latche) |
| 29 | { |
| 30 | if(latche&0x10) |
| 31 | setprg16(0x8000,(latche&7)); |
| 32 | else |
| 33 | setprg16(0x8000,(latche&7)|8); |
| 34 | } |
| 35 | else |
| 36 | setprg16(0x8000,7+(ROM_size>>4)); |
| 37 | } |
| 38 | |
| 39 | static DECLFW(M188Write) |
| 40 | { |
| 41 | latche=V; |
| 42 | Sync(); |
| 43 | } |
| 44 | |
| 45 | static DECLFR(ExtDev) |
| 46 | { |
| 47 | return(3); |
| 48 | } |
| 49 | |
| 50 | static void Power(void) |
| 51 | { |
| 52 | latche=0; |
| 53 | Sync(); |
| 54 | setchr8(0); |
| 55 | setprg16(0xc000,0x7); |
| 56 | SetReadHandler(0x6000,0x7FFF,ExtDev); |
| 57 | SetReadHandler(0x8000,0xFFFF,CartBR); |
| 58 | SetWriteHandler(0x8000,0xFFFF,M188Write); |
| 59 | } |
| 60 | |
| 61 | static void StateRestore(int version) |
| 62 | { |
| 63 | Sync(); |
| 64 | } |
| 65 | |
| 66 | void Mapper188_Init(CartInfo *info) |
| 67 | { |
| 68 | info->Power=Power; |
| 69 | GameStateRestore=StateRestore; |
| 70 | AddExState(&latche, 1, 0, "LATCH"); |
| 71 | } |