From: Lemponen Olli <l158134 AT proffa DOT cc DOT tut DOT fi>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Interrupts and locking code
Date: Thu, 3 Apr 1997 19:06:24 +0300
Organization: Tampere University of Technology
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The second one is easy. Define a static local variable (or global) and
everytime the interrupt is called (every 0.5ms) increment it. When it
equals 109, call the original dos handler and zero your variable.

Olli Lemponen