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Article #8335Need help with TSR program
From: G. Terry Gold
Date: Tue, 14 Oct 1986 21:54
Date: Tue, 14 Oct 1986 21:54
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1489 bytes
1. Does anyone have the source to a memory resident clock utility?
2. Re: 1 I've tried writting this myself and can't seem to make it
work. I've written quite a few TSR programs, including several
that steal the timer interupt, but this one has me stumped.
I've found that I can't use the int 21H, 2cH function call because
the PC tech ref manual says that you should only use functions
below 9H. I've seen a way around this (make a copy of the stack)
but isn't there an easier way?
My next attempt was to read the port directly, but it always returns
a 0FH indicating (so my manual says) that it was being updated when
I tried to read it. I've done retrys and always get the 0FH.
Any ideas? (My end goal is a memory resident elapsed timer.)
Thanks,
--
ihnp4 \
Terry Gold AT&T ISL --- druil!gold
Denver, Colorado allegra / (303) 538-1135
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!cbatt!ihnp4!drutx!druil!gold From: gold@druil.UUCP (G. Terry Gold) Newsgroups: net.micro.pc Subject: Need help with TSR program Message-ID: <157@druil.UUCP> Date: Tue, 14-Oct-86 17:54:50 EDT Article-I.D.: druil.157 Posted: Tue Oct 14 17:54:50 1986 Date-Received: Fri, 17-Oct-86 10:00:05 EDT Organization: AT&T Information Systems Labs, Denver, Co Lines: 25