From: Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Jump from timer interrupt?
Date: 8 Jun 2003 19:08:56 GMT
Organization: Aachen University of Technology (RWTH)
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Erik Berglund <erik2 DOT berglund AT telia DOT com> wrote:

> I am writing a music sequencer program for DOS using djgpp 2.01
> and gcc 2.7.2.1, 

Those quite old versions.  You may want to update your tools once in a
while...

> the sequencer. Is it possible to jump from my interrupt routine
> to the PC timer interrupt once in a while, to update the PC clock
> at 18.2 Hz? 

Yes, but it may be a bit hard to do from C code.  You may have to use
(inline) assembler for that.  At minimum, you'll need a protected mode
wrapper around the real-mode interrupt handler so you can call it from
compiled C code.


-- 
Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
Even if all the snow were burnt, ashes would remain.