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From: rde@ukc.ac.uk (R.D.Eager)
Newsgroups: comp.sys.ibm.pc
Subject: Bidirectional use of parallel port
Message-ID: <441@harrier.ukc.ac.uk>
Date: 15 Mar 89 21:15:06 GMT
Reply-To: rde@ukc.ac.uk (R.D.Eager)
Organization: Computing Lab, University of Kent at Canterbury, UK.
Lines: 16


I see reviews of various products for fast transfer of files between PCs
using the parallel port. My question is: how do they do this? The PC parallel
port is inherently unidirectional, so are they just using the status lines
for transferring data? I would like to know...I have an application where
I want bidirectional transfer like this.

Before you post a reply quoting the PS/2; yes, I know that the PS/2 has a
real bidirectional parallel port and that this is used for the IBM Data
Migration Facility. I am asking about transfer using a vanilla parallel
port on a PC/XT.....
-- 
           Bob Eager
           rde@ukc.UUCP
           ...!mcvax!ukc!rde
           Phone: +44 227 764000 ext 7589