Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!apple!usc!zaphod.mps.ohio-state.edu!ncar!umigw!mthvax!wb8foz
From: wb8foz@mthvax.cs.miami.edu (David Lesher)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: Reading PRN:-port
Message-ID: <1990Nov1.222827.23769@mthvax.cs.miami.edu>
Date: 1 Nov 90 22:28:27 GMT
References: <1393@tnosoes.izf.tno.nl> <1150@cameron.egr.duke.edu>
Reply-To: wb8foz@mthvax.cs.miami.edu (David Lesher)
Distribution: na
Organization: NRK Clinic for habitual NetNews Abusers
Lines: 23

Others said:

>> Looking for a program that lets me READ the parallel-port (PRN:) on a
>                                     ^^^^
>If you look in the schematics for any parallel you will find it is a one way
>set of registers.  the only line that comes in is some sort of acknowledge
>line.

Sigh..
I think this topic belongs in the in the MFAQ list.

The genuine I-BEAM parallel port on the XT lacked one jumper from, as I
recall, the command decoder to the bus latches. This seemed to smell of
a last minute marketing decision to disable it. It's easy to add.
I did, but so long ago I cannot recall details.

Most clone boards are bidirectional. 

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