looking for information on programming parallel ports

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#134

From: Russell Nelson
Date: Tue, 07 Apr 1992 13:50

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In article <1992Apr03.124319.652@vort.uucp> mike@vort.uucp writes:

  > is it possible to program the parallel port(s) in such a way that
  > an interrupt is generated when a character is output?

Sure.  Set bit 4 of port 37a (base+2).

  > can the parallel port also be used as an input device, and if so,
  > is an interrupt generated when a character arrives?

Some can, some can't.  You can always use the five input status
lines.  That's what laplink uses on their parallel port.  The low
five output pins are connected to the other machine's five input
status pins and vice-versa.  Such cables are available from Dalco
Electronics (they advertise in Computer Shoppper).

-russ <nelson@crynwr.com>  I'm proud to be a humble Quaker!
Crynwr Software                   315-268-1925 Voice
11 Grant St.                      315-268-9201 FAX
Potsdam, NY 13676

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Path: arc1-ca.pugleaf.net!sparky!uunet!usc!sdd.hp.com!hp-cv!ogicse!das-news.harvard.edu!spdcc!dirtydog.ima.isc.com!ispd-newsserver!psinntp!crynwr!nelson
From: nelson@crynwr.com (Russell Nelson)
Newsgroups: alt.msdos.programmer,comp.os.msdos.programmer
Subject: looking for information on programming parallel ports
Message-ID: <702654608snx@crynwr.com>
Date: 7 Apr 92 13:50:08 GMT
Article-I.D.: crynwr.702654608snx
References: <1992Apr03.124319.652@vort.uucp>
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