| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2003 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 | #define rom_sw mapbyte1[0] |
| 24 | |
| 25 | void Mapper230_Reset(void) |
| 26 | { |
| 27 | rom_sw ^= 1; //1 - rom_sw; |
| 28 | |
| 29 | if( rom_sw ) { |
| 30 | ROM_BANK16(0x8000,0); |
| 31 | ROM_BANK16(0xc000,7); |
| 32 | } else { |
| 33 | ROM_BANK16(0x8000,8); |
| 34 | ROM_BANK16(0xc000,39); |
| 35 | } |
| 36 | MIRROR_SET2(1); |
| 37 | } |
| 38 | |
| 39 | static DECLFW(Mapper230_write) |
| 40 | { |
| 41 | if( rom_sw ) { |
| 42 | ROM_BANK16( 0x8000, V&0x07 ); |
| 43 | } else { |
| 44 | if( V & 0x20 ) { |
| 45 | ROM_BANK16( 0x8000, (V&0x1F)+8 ); |
| 46 | ROM_BANK16( 0xc000, (V&0x1F)+8 ); |
| 47 | } else { |
| 48 | ROM_BANK32( ((V&0x1E) >> 1) + 4 ); |
| 49 | } |
| 50 | MIRROR_SET2( ((V & 0x40) >> 6) ); |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | void Mapper230_init(void) |
| 55 | { |
| 56 | ROM_BANK16(0x8000,0); |
| 57 | ROM_BANK16(0xc000,7); |
| 58 | SetWriteHandler(0x8000, 0xffff, Mapper230_write); |
| 59 | MapperReset = Mapper230_Reset; |
| 60 | rom_sw = 1; |
| 61 | } |
| 62 | |