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Mail Archives: djgpp/1995/03/03/05:04:52

To: Charles Sandmann <sandmann AT praline DOT no DOT neosoft DOT com>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu (DJGPP Mailing List)
Subject: Re: One More Confused Interrupt Question
Date: Fri, 03 Mar 95 11:05:29 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>

> 2) The interrupt reflection overhead between the two modes can be an
>    issue, but only in extreme cases.  My 486/33 can handle around 10K of
>    these reflections per second, which means I can handle a 1024Hz clock,

Does this mean the interrupt reflection overhead takes
a whopping 3000 cycles (100 microseconds/reflection on
a 30-ns cycle machine)?  Seems like a lot to me.  If it
is indeed so, is all that overhead really necessary?
Where does it go?

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