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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #define K4buf mapbyte2
24 #define K4buf2 mapbyte3
26 void JalecoIRQHook(int a)
33 X6502_IRQBegin(FCEU_IQEXT);
40 DECLFW(Mapper18_write)
43 if(A>=0x8000 && A<=0x9001)
45 int x=((A>>1)&1)|((A-0x8000)>>11);
47 K4buf2[x]&=(0xF0)>>((A&1)<<2);
48 K4buf2[x]|=(V&0xF)<<((A&1)<<2);
49 ROM_BANK8(0x8000+(x<<13),K4buf2[x]);
51 else if(A>=0xa000 && A<=0xd003)
53 int x=((A>>1)&1)|((A-0xA000)>>11);
55 K4buf[x]&=(0xF0)>>((A&1)<<2);
56 K4buf[x]|=(V&0xF)<<((A&1)<<2);
57 VROM_BANK1(x<<10,K4buf[x]);
61 case 0xe000:IRQLatch&=0xFFF0;IRQLatch|=(V&0x0f);break;
62 case 0xe001:IRQLatch&=0xFF0F;IRQLatch|=(V&0x0f)<<4;break;
63 case 0xe002:IRQLatch&=0xF0FF;IRQLatch|=(V&0x0f)<<8;break;
64 case 0xe003:IRQLatch&=0x0FFF;IRQLatch|=(V&0x0f)<<12;break;
65 case 0xf000:IRQCount=IRQLatch;
68 X6502_IRQEnd(FCEU_IQEXT);
70 case 0xf002:MIRROR_SET2(V&1);
76 void Mapper18_init(void)
78 SetWriteHandler(0x8000,0xffff,Mapper18_write);
79 MapIRQHook=JalecoIRQHook;