| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2003 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 | static void Sync(void) |
| 24 | { |
| 25 | int x; |
| 26 | |
| 27 | setmirror(((mapbyte1[0]>>6)&1)^1); |
| 28 | switch(mapbyte1[1]&0x3) |
| 29 | { |
| 30 | case 0x0: |
| 31 | for(x=0;x<4;x++) |
| 32 | setprg8(0x8000+x*8192,(((mapbyte1[0]&0x7F)<<1)+x)^(mapbyte1[0]>>7)); |
| 33 | break; |
| 34 | case 0x2: |
| 35 | for(x=0;x<4;x++) |
| 36 | setprg8(0x8000+x*8192,((mapbyte1[0]&0x7F)<<1)+(mapbyte1[0]>>7)); |
| 37 | break; |
| 38 | case 0x1: |
| 39 | case 0x3: |
| 40 | for(x=0;x<4;x++) |
| 41 | { |
| 42 | unsigned int b; |
| 43 | |
| 44 | b=mapbyte1[0]&0x7F; |
| 45 | if(x>=2 && !(mapbyte1[1]&0x2)) |
| 46 | b=0x7F; |
| 47 | setprg8(0x8000+x*8192,(x&1)+((b<<1)^(mapbyte1[0]>>7))); |
| 48 | } |
| 49 | break; |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | |
| 54 | static DECLFW(Mapper15_write) |
| 55 | { |
| 56 | mapbyte1[0]=V; |
| 57 | mapbyte1[1]=A&3; |
| 58 | Sync(); |
| 59 | } |
| 60 | |
| 61 | static void StateRestore(int version) |
| 62 | { |
| 63 | Sync(); |
| 64 | } |
| 65 | |
| 66 | void Mapper15_init(void) |
| 67 | { |
| 68 | mapbyte1[0]=mapbyte1[1]=0; |
| 69 | Sync(); |
| 70 | GameStateRestore=StateRestore; |
| 71 | SetWriteHandler(0x8000,0xFFFF,Mapper15_write); |
| 72 | } |
| 73 | |