| 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 | |
| 24 | |
| 25 | static DECLFW(Mapper255_write) |
| 26 | { |
| 27 | uint32 pbank=(A>>7)&0x1F; |
| 28 | uint32 cbank=A&0x3F; |
| 29 | uint32 rbank=(A>>14)&1; |
| 30 | |
| 31 | // printf("$%04x:$%02x\n",A,V); |
| 32 | // printf("%2x:%2x:%2x,%2x\n",pbank,cbank,rbank,(A&0x40)>>6); |
| 33 | |
| 34 | if(A&0x1000) |
| 35 | { |
| 36 | ROM_BANK16(0x8000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6)); |
| 37 | ROM_BANK16(0xc000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6)); |
| 38 | } |
| 39 | else |
| 40 | { |
| 41 | ROM_BANK32(pbank|(rbank<<5)); |
| 42 | } |
| 43 | MIRROR_SET((A>>13)&1); |
| 44 | VROM_BANK8((rbank<<6)|cbank); |
| 45 | } |
| 46 | |
| 47 | static DECLFW(Mapper255_wl) |
| 48 | { |
| 49 | // printf("Wr: $%04x:$%02x\n",A,V); |
| 50 | mapbyte1[A&3]=V&0xF; |
| 51 | } |
| 52 | |
| 53 | static DECLFR(Mapper255_read) |
| 54 | { |
| 55 | //printf("Rd: $%04x\n",A); |
| 56 | return(mapbyte1[A&3]); //|(X.DB&0xF0)); |
| 57 | } |
| 58 | |
| 59 | void Mapper255_init(void) |
| 60 | { |
| 61 | mapbyte1[0]=mapbyte1[1]=0xF; |
| 62 | ROM_BANK32(0); |
| 63 | VROM_BANK8(0); |
| 64 | SetWriteHandler(0x5800,0x5FFF,Mapper255_wl); |
| 65 | SetWriteHandler(0x8000,0xffff,Mapper255_write); |
| 66 | SetReadHandler(0x5800,0x5FFF,Mapper255_read); |
| 67 | } |