Aw: Re: [stella] Why do we use the SEI instruction???

Subject: Aw: Re: [stella] Why do we use the SEI instruction???
From: cybergoth@xxxxxxxx
Date: Mon, 4 Aug 2003 21:37:09 +0200 (CEST)
Hi there!

> > Which is wrong. BRK causes an NMI and is so totally disregarding the
> > Interrupt-Flag.
 
> No, BRK uses $xffe, which is the IRQ vector.

BRK is an NMI, basta!
 
> But you are right, you can not disable BRK by using CLI.

That's why they call it a *N*on *M*askable *I*nterrupt ;-)
 
> Yup and according to Kevin Horton ([stella] 03 Sep 2001) CLD is too.
> :-)

Hm... I remember some people had troubles playing Gunfight on a CC back then, when I was relying on a certain power-up bcd flag state there... :)

Greetings,
Manuel


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