+++ /dev/null
-/* FCE Ultra - NES/Famicom Emulator
- *
- * Copyright notice for this file:
- * Copyright (C) 2002 Xodnizel
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "mapinc.h"
-
-#define K4buf mapbyte2
-#define K4buf2 mapbyte3
-
-void JalecoIRQHook(int a)
-{
- if(IRQa && IRQCount)
- {
- IRQCount-=a;
- if(IRQCount<=0)
- {
- X6502_IRQBegin(FCEU_IQEXT);
- IRQCount=0;
- IRQa=0;
- }
- }
-}
-
-DECLFW(Mapper18_write)
-{
- A&=0xF003;
- if(A>=0x8000 && A<=0x9001)
- {
- int x=((A>>1)&1)|((A-0x8000)>>11);
-
- K4buf2[x]&=(0xF0)>>((A&1)<<2);
- K4buf2[x]|=(V&0xF)<<((A&1)<<2);
- ROM_BANK8(0x8000+(x<<13),K4buf2[x]);
- }
- else if(A>=0xa000 && A<=0xd003)
- {
- int x=((A>>1)&1)|((A-0xA000)>>11);
-
- K4buf[x]&=(0xF0)>>((A&1)<<2);
- K4buf[x]|=(V&0xF)<<((A&1)<<2);
- VROM_BANK1(x<<10,K4buf[x]);
- }
- else switch(A)
- {
- case 0xe000:IRQLatch&=0xFFF0;IRQLatch|=(V&0x0f);break;
- case 0xe001:IRQLatch&=0xFF0F;IRQLatch|=(V&0x0f)<<4;break;
- case 0xe002:IRQLatch&=0xF0FF;IRQLatch|=(V&0x0f)<<8;break;
- case 0xe003:IRQLatch&=0x0FFF;IRQLatch|=(V&0x0f)<<12;break;
- case 0xf000:IRQCount=IRQLatch;
- break;
- case 0xf001:IRQa=V&1;
- X6502_IRQEnd(FCEU_IQEXT);
- break;
- case 0xf002:MIRROR_SET2(V&1);
- if(V&2) onemir(0);
- break;
- }
-}
-
-void Mapper18_init(void)
-{
- SetWriteHandler(0x8000,0xffff,Mapper18_write);
- MapIRQHook=JalecoIRQHook;
-}