/* 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
#define K4buf mapbyte2
#define K4IRQ mapbyte1[1]
#define K4sel mapbyte1[0]
-
-DECLFW(Mapper23_write)
+static int acount=0;
+static DECLFW(Mapper23_write)
{
if((A&0xF000)==0x8000)
{
ROM_BANK8(0xC000,V);
else
ROM_BANK8(0x8000,V);
- X6502_Rebase();
- }
+ }
else if((A&0xF000)==0xA000)
- {
ROM_BANK8(0xA000,V);
- X6502_Rebase();
- }
else
{
A|=((A>>2)&0x3)|((A>>4)&0x3)|((A>>6)&0x3);
{
case 0xf000:X6502_IRQEnd(FCEU_IQEXT);IRQLatch&=0xF0;IRQLatch|=V&0xF;break;
case 0xf001:X6502_IRQEnd(FCEU_IQEXT);IRQLatch&=0x0F;IRQLatch|=V<<4;break;
- case 0xf002:X6502_IRQEnd(FCEU_IQEXT);IRQCount=IRQLatch;IRQa=V&2;K4IRQ=V&1;break;
+ case 0xf002:X6502_IRQEnd(FCEU_IQEXT);acount=0;IRQCount=IRQLatch;IRQa=V&2;K4IRQ=V&1;break;
case 0xf003:X6502_IRQEnd(FCEU_IQEXT);IRQa=K4IRQ;break;
case 0x9001:
case 0x9002:
swa=PRGBankList[0];
ROM_BANK8(0x8000,PRGBankList[2]);
ROM_BANK8(0xc000,swa);
- X6502_Rebase();
}
K4sel=V;
break;
case 0x9000:
- switch(V&0x3)
- {
+ if(V!=0xFF)
+ switch(V&0x3)
+ {
case 0:MIRROR_SET(0);break;
- case 1:MIRROR_SET(1);break;
- case 2:onemir(0);break;
- case 3:onemir(1);break;
- }
- break;
+ case 1:MIRROR_SET(1);break;
+ case 2:onemir(0);break;
+ case 3:onemir(1);break;
+ }
+ break;
}
}
}
void FP_FASTAPASS(1) KonamiIRQHook2(int a)
{
- static int acount=0;
+ #define LCYCS 341
if(IRQa)
- {
- acount+=(a<<1)+a;
- if(acount>=342)
+ {
+ acount+=a*3;
+ if(acount>=LCYCS)
{
- doagainbub:acount-=342;IRQCount++;
+ doagainbub:acount-=LCYCS;IRQCount++;
if(IRQCount&0x100) {X6502_IRQBegin(FCEU_IQEXT);IRQCount=IRQLatch;}
- if(acount>=342) goto doagainbub;
+ if(acount>=LCYCS) goto doagainbub;
}
}
}