1 /* FCE Ultra - NES/Famicom Emulator
3 * Copyright notice for this file:
4 * Copyright (C) 2002 Xodnizel
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.
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.
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
23 static DECLFW(Mapper91_write)
26 //printf("$%04x:$%02x, %d\n",A,V,scanline);
29 if(A>=0x6000 && A<=0x6003) VROM_BANK2((A&3)*2048,V);
33 case 0x7001:ROM_BANK8(0x8000+(A&1)*8192,V);break;
34 case 0x7002:IRQa=IRQCount=0;X6502_IRQEnd(FCEU_IQEXT);break;
35 case 0x7003:IRQa=1;X6502_IRQEnd(FCEU_IQEXT);break;
36 // default: printf("Iyee: $%04x:$%02x\n",A,V);break;
39 // printf("$%04x:$%02x, %d\n",A,V,scanline);
42 static void Mapper91_hb(void)
44 if(IRQCount<8 && IRQa)
49 X6502_IRQBegin(FCEU_IQEXT);
54 void Mapper91_init(void)
56 SetWriteHandler(0x4020,0xFFFF,Mapper91_write);
57 GameHBIRQHook=Mapper91_hb;