Newsgroups:	comp.os.msdos.djgpp
From:	Peter Berdeklis <peter AT atmosp DOT physics DOT utoronto DOT ca>
Subject:	Re: Interrupts (Hardware)
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Date:	Wed, 9 Apr 1997 15:32:35 GMT
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On Tue, 8 Apr 1997, Schuster wrote:
> I'm reading 12 input-values with the ISA Bus via Hadware interrupts at a
> frequency 
> of ~12khz and a simple PM Handler, also I do some graphics (with
> Allegro) on 
> the screen- works fine with a P90...

The FAQ suggests that anything more than 10Khz might need a RM handler as 
well.  However, if you've got a P90 then the extra clock cycles probably 
aren't a big deal.

The graphics won't affect interrupt latency at all.  The graphics code is 
just interrupted.  In fact, most graphics code is slow not because of the 
CPU time it uses but because the bus is slow (ray tracing is an obvious 
exception).

---------------
Peter Berdeklis
Dept. of Physics, Univ. of Toronto

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