| 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(Mapper43_write) |
| 26 | { |
| 27 | //printf("$%04x:$%02x\n",A,V); |
| 28 | if((A&0x8122)==0x8122) |
| 29 | { |
| 30 | X6502_IRQEnd(FCEU_IQEXT); |
| 31 | if(V&2) IRQa=1; |
| 32 | else |
| 33 | IRQCount=IRQa=0; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | static DECLFW(M43Low) |
| 38 | { |
| 39 | // int transo[8]={4,3,4,4,4,7,5,6}; |
| 40 | int transo[8]={4,3,2,3,4,7,5,6}; |
| 41 | A&=0xF0FF; |
| 42 | if(A==0x4022) |
| 43 | setprg8(0x6000,transo[V&7]); |
| 44 | //printf("$%04x:$%02x\n",A,V); |
| 45 | } |
| 46 | |
| 47 | static void FP_FASTAPASS(1) M43Ho(int a) |
| 48 | { |
| 49 | IRQCount+=a; |
| 50 | if(IRQa) |
| 51 | if(IRQCount>=4096) |
| 52 | { |
| 53 | X6502_IRQBegin(FCEU_IQEXT); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | //static DECLFR(boo) |
| 58 | //{ |
| 59 | // printf("$%04x\n",A); |
| 60 | // return( ROM[0x2000*8 +0x1000 +(A-0x5000)]); |
| 61 | //} |
| 62 | |
| 63 | void Mapper43_init(void) |
| 64 | { |
| 65 | setprg4(0x5000,16); |
| 66 | setprg8(0x6000,2); |
| 67 | setprg8(0x8000,1); |
| 68 | setprg8(0xa000,0); |
| 69 | setprg8(0xc000,4); |
| 70 | setprg8(0xe000,9); |
| 71 | SetWriteHandler(0x8000,0xffff,Mapper43_write); |
| 72 | SetWriteHandler(0x4020,0x7fff,M43Low); |
| 73 | //SetReadHandler(0x5000,0x5fff,boo); |
| 74 | SetReadHandler(0x6000,0xffff,CartBR); |
| 75 | MapIRQHook=M43Ho; |
| 76 | } |