| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2011 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 uint8 prg_perm[4][4] = { |
| 24 | {0, 1, 2, 3,}, |
| 25 | {3, 2, 1, 0,}, |
| 26 | {0, 2, 1, 3,}, |
| 27 | {3, 1, 2, 0,}, |
| 28 | }; |
| 29 | |
| 30 | static uint8 chr_perm[8][8] = { |
| 31 | {0, 1, 2, 3, 4, 5, 6, 7,}, |
| 32 | {0, 2, 1, 3, 4, 6, 5, 7,}, |
| 33 | {0, 1, 4, 5, 2, 3, 6, 7,}, |
| 34 | {0, 4, 1, 5, 2, 6, 3, 7,}, |
| 35 | {0, 4, 2, 6, 1, 5, 3, 7,}, |
| 36 | {0, 2, 4, 6, 1, 3, 5, 7,}, |
| 37 | {7, 6, 5, 4, 3, 2, 1, 0,}, |
| 38 | {7, 6, 5, 4, 3, 2, 1, 0,}, |
| 39 | }; |
| 40 | |
| 41 | static DECLFW(Mapper244_write) |
| 42 | { |
| 43 | if(V&8) |
| 44 | VROM_BANK8(chr_perm[(V>>4)&7][V&7]); |
| 45 | else |
| 46 | ROM_BANK32(prg_perm[(V>>4)&3][V&3]); |
| 47 | } |
| 48 | |
| 49 | void Mapper244_init(void) |
| 50 | { |
| 51 | ROM_BANK32(0); |
| 52 | SetWriteHandler(0x8000,0xffff,Mapper244_write); |
| 53 | } |