[A83] Re: AGAIN!!!!!!!!!!!!!

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: AGAIN!!!!!!!!!!!!!
From: "SUCKER [Pieter Van Nuffel]" <sucker_pvn@hotmail.com>
Date: Sun, 28 Jul 2002 17:37:06 +0000
Reply-To: assembly-83@lists.ticalc.org



>And BTW - I doubt anybody on this list will know, but I have a question.
>When you disable the interrupts via 'di', does the CPU simply ignore any
>interrupts that are triggered? or does the piece of hardware that triggeres
>the interrupts simply stop it's internal timer?  I guess what I'm trying to
>say is if you di, do you miss any interrupts?
>- - Joe
>joe@joepnet.com

So you doubt anyone would know? Whenever you do a "di" the internal CPU 
flipflop for interrupts is reset("ei" = set). So I would guess whenever an 
interrupt should occur the z80 checks that flipflop to call the 'im 0-1-2 
routine' or not. And you're wrong about the internal timer. Those aren't the 
only interrupts. The [ON] key also generates them...


      SUCKER [Pieter Van Nuffel]

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Follow-Ups:

[A83] Re: AGAIN!!!!!!!!!!!!!

From: robvanwijk@gmx.net

[A83] Re: AGAIN!!!!!!!!!!!!!

From: "Joe Pemberton" <joe@joepnet.com>