/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
- * Copyright (C) 2002 Ben Parnell
+ * 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
static DECLFW(Mapper42_write)
{
+// FCEU_printf("%04x:%04x\n",A,V);
switch(A&0xe003)
{
+ case 0x8000:VROM_BANK8(V);break;
case 0xe000:mapbyte1[0]=V;ROM_BANK8(0x6000,V&0xF);break;
case 0xe001:MIRROR_SET((V>>3)&1);break;
- case 0xe002:IRQa=V&2;if(!IRQa) IRQCount=0;break;
+ case 0xe002:IRQa=V&2;if(!IRQa) IRQCount=0;X6502_IRQEnd(FCEU_IQEXT);break;
}
}
{
if(IRQa)
{
- if(IRQCount<24576)
- IRQCount+=a;
+ IRQCount+=a;
+ if(IRQCount>=32768) IRQCount-=32768;
+ if(IRQCount>=24576)
+ X6502_IRQBegin(FCEU_IQEXT);
else
- {
- IRQa=0;
- TriggerIRQ();
- }
+ X6502_IRQEnd(FCEU_IQEXT);
}
}
{
ROM_BANK8(0x6000,0);
ROM_BANK32(~0);
- SetWriteHandler(0xe000,0xffff,Mapper42_write);
+ SetWriteHandler(0x6000,0xffff,Mapper42_write);
SetReadHandler(0x6000,0x7fff,CartBR);
MapStateRestore=Mapper42_StateRestore;
MapIRQHook=Mapper42IRQ;