Message-ID:	<3526B065.F60D9B41@bellsouth.net>
From:	Lester Davis <ringo1 AT bellsouth DOT net>
Reply-To:	ringo1 AT bellsouth DOT net
MIME-Version:	1.0
Newsgroups:	comp.os.msdos.djgpp
Subject:	Parallel port problem
Lines:	23
Date:	Sat, 04 Apr 1998 22:17:06 GMT
NNTP-Posting-Host:	host-209-138-31-169.atl.bellsouth.net
NNTP-Posting-Date:	Sat, 04 Apr 1998 17:17:06 EST
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I have a problem accessing the parallel port on a few computers. The
problem is with timing. I have a sonar unit that that pings once a
second. the output from a 555 timer is low for a second, then hi for
10-150 milliseconds then low again. I'm trying to measure the hi and low
time. On 3 out of 5 computers I tried this on, I get Hi and low times
that are close to each other. On 2 other machines it works great. The 2
machines it works on are a 386 and a pentium, the 3 it does not work on
are 2 486 laptops and another 386. has anyone ever had this type of
problem before? One suggestion given to me was to compile the code so
its 286 compliant, How do you do this?
Any help will be greatly appreciated.



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Lester (Ringo) Davis

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