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From: zhou@brazil.psych.purdue.edu (Albert Zhou)
Newsgroups: comp.lang.pascal
Subject: Re: Problems with interrupt handler for interrupt 08 or 1C in TP 6.0
Message-ID: <11648@j.cc.purdue.edu>
Date: 4 Jan 91 19:24:42 GMT
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References: <1991Jan4.145541.17737@odin.diku.dk>
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Reply-To: zhou@brazil.psych.purdue.edu (Albert Zhou)
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Distribution: comp
Organization: Purdue University
Keywords: interrupt, timer, turbo pascal

If the program (say, WordPerfect) you are using happens to call Int 1C, when
your TSR is in the middle of running, you will get stuck. 

procedure yourintproc;
interrupt
begin
 set Int 1c to the old vector;
 (so that the interrupted program can do its own clock interrrupt) 
 do your things;

 set Int 1c back to @yourintproc;
end;