Re: A89: timer port

To: assembly-89@lists.ticalc.org
Subject: Re: A89: timer port
From: Olle Hedman <oh@hem.passagen.se>
Date: Wed, 16 Dec 1998 17:46:32 +0100
Delivered-To: assembly-89-outgoing@towerguard.unix.edu.sollentuna.se
References: <6011e0a5.36774e58@aol.com> <3677D0BC.DE649769@hem.passagen.se>
Reply-To: assembly-89@lists.ticalc.org


correction: it is increased every 6250th clock ofcourse..

/Olle

Olle Hedman wrote:
> 
> yes..  But it's not the frequncy you write to the port...
> it is correct though that a higher value will give a faster interrupt..
> what it does is that it increases the value on written to this port with one,
> every 4th instruction, and when this value reach 0, it is resetted to the value
> written to the port...  It is when this resetting occurs, the interrupt is
> triggered..
> 
> //Olle
> 
> Daniel7073@aol.com wrote:
> >
> > In a message dated 12/15/1998 10:07:30 PM Pacific Standard Time,
> > nlmueller@students.wisc.edu writes:
> >
> > > Hz = cycles/second
> > >
> > >  If the value is 5 Hz, that means:
> > >
> > >  5 = 1/time
> > >  time = .2s
> > >
> > >  Quite simple.
> > >
> > >       --Nate
> >
> > Thanks for clearing that up.  I thought it was much more complicated, but I'm
> > glad that it's not.
> >
> > Daniel Imfeld

References:

Re: A89: timer port

From: Daniel7073@aol.com

Re: A89: timer port

From: Olle Hedman <oh@hem.passagen.se>