Re: A86: Re: asm clock?

To: <assembly-86@lists.ticalc.org>
Subject: Re: A86: Re: asm clock?
From: "Dux Gregis" <assets@eden.rutgers.edu>
Date: Sat, 12 Sep 1998 21:14:12 -0400
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-86@lists.ticalc.org



A circumstance that rare and trivial is far into the noise of what affects
interrupts.  If someone is going to make asm clock, the only circumstance
affecting the irregularity of interrupts is going to be battery power.


>
>> The only factor affecting the interrupt is the battery
>> power.  An interrupt by definition is called on
>> precisely even intervals, regardless even of the
>> varying lengths at which the interrupt resides.
>
>Actually, the interrupt is affected by itself.  The Z80
>will not call an interrupt during an interrupt, so if the
>interrupt routine is extremely long (over 1/200s), the
>next interrupt call will not occur on time.
>

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