| 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 | DECLFW(Mapper117_write) |
| 26 | { |
| 27 | //if(A>=0xc000) |
| 28 | //printf("$%04x:$%02x, %d,%d\n",A,V,scanline,timestamp); |
| 29 | switch(A) |
| 30 | { |
| 31 | case 0xc001:IRQLatch=V;break; |
| 32 | case 0xc003:IRQCount=IRQLatch;IRQa|=2;break; |
| 33 | case 0xe000:IRQa&=~1;IRQa|=V&1;X6502_IRQEnd(FCEU_IQEXT);break; |
| 34 | case 0xc002:X6502_IRQEnd(FCEU_IQEXT);break; |
| 35 | case 0xa000:VROM_BANK1(0x0000,V);break; |
| 36 | case 0xa001:VROM_BANK1(0x0400,V);break; |
| 37 | case 0xa002:VROM_BANK1(0x0800,V);break; |
| 38 | case 0xa003:VROM_BANK1(0x0c00,V);break; |
| 39 | case 0xa004:VROM_BANK1(0x1000,V);break; |
| 40 | case 0xa005:VROM_BANK1(0x1400,V);break; |
| 41 | case 0xa006:VROM_BANK1(0x1800,V);break; |
| 42 | case 0xa007:VROM_BANK1(0x1c00,V);break; |
| 43 | case 0x8000:ROM_BANK8(0x8000,V);break; |
| 44 | case 0x8001:ROM_BANK8(0xa000,V);break; |
| 45 | case 0x8002:ROM_BANK8(0xc000,V);break; |
| 46 | case 0x8003:ROM_BANK8(0xe000,V);break; |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | static void Mapper117_hb(void) |
| 51 | { |
| 52 | //if(scanline==0x40) X6502_IRQBegin(FCEU_IQEXT); |
| 53 | //return; |
| 54 | if(IRQa==3 && IRQCount) |
| 55 | { |
| 56 | IRQCount--; |
| 57 | if(!IRQCount) |
| 58 | { |
| 59 | IRQa&=1; |
| 60 | X6502_IRQBegin(FCEU_IQEXT); |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | void Mapper117_init(void) |
| 66 | { |
| 67 | GameHBIRQHook=Mapper117_hb; |
| 68 | SetWriteHandler(0x8000,0xffff,Mapper117_write); |
| 69 | } |
| 70 | |