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

To: <assembly-83@lists.ticalc.org>
Subject: [A83] Re: AGAIN!!!!!!!!!!!!!
From: "Joe Pemberton" <joe@joepnet.com>
Date: Sun, 28 Jul 2002 15:14:02 -0700
References: <F163hBePrbNhQpxU3l500001bcb@hotmail.com>
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]
>
>
...and that would make me wrong about the internal timer how?..  I realize
that the ON key generates interrupts as well.
- - Joe
joe@joepnet.com

References:

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

From: "SUCKER [Pieter Van Nuffel]" <sucker_pvn@hotmail.com>

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