| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 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 | |
| 24 | #define map75sel mapbyte1[0] |
| 25 | #define map75ar mapbyte2 |
| 26 | |
| 27 | DECLFW(Mapper75_write) |
| 28 | { |
| 29 | switch(A&0xF000) |
| 30 | { |
| 31 | case 0x8000:ROM_BANK8(0x8000,V);break; |
| 32 | case 0x9000: |
| 33 | VROM_BANK4(0x0000,map75ar[0]|((V&2)<<3)); |
| 34 | VROM_BANK4(0x1000,map75ar[1]|((V&4)<<2)); |
| 35 | map75sel=V;MIRROR_SET(V&1);break; |
| 36 | case 0xa000:ROM_BANK8(0xa000,V);break; |
| 37 | case 0xc000:ROM_BANK8(0xc000,V);break; |
| 38 | case 0xe000:V&=0xF;map75ar[0]=V;V|=(map75sel&2)<<3;VROM_BANK4(0x0000,V);break; |
| 39 | case 0xf000:V&=0xF;map75ar[1]=V;V|=(map75sel&4)<<2;VROM_BANK4(0x1000,V);break; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | void Mapper75_init(void) |
| 44 | { |
| 45 | SetWriteHandler(0x8000,0xffff,Mapper75_write); |
| 46 | } |
| 47 | |