Newsgroups: sci.electronics,comp.robotics
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!news2.near.net!news.mathworks.com!uunet!ncrgw2.ncr.com!ncrhub2!attwat!brentb
From: brentb@epsudev1.Waterloo.ATTGIS.Com (Brent Boghosian)
Subject: Re: bidirectional parallel port
In-Reply-To: jmh@vttoulu.tko.vtt.fi's message of 14 Mar 1995 10:09:29 GMT
Message-ID: <BRENTB.95Mar16110610@epsudev1.Waterloo.ATTGIS.Com>
Sender: news@attwat.Waterloo.ATTGIS.COM (News System)
Organization: AT&T Global Information Solutions, Waterloo, Ont.
References: <3k3q0p$p41@ousrvr.oulu.fi>
Date: Thu, 16 Mar 1995 16:06:09 GMT
Lines: 49
Xref: glinda.oz.cs.cmu.edu sci.electronics:123992 comp.robotics:18966

In article <3k3q0p$p41@ousrvr.oulu.fi> jmh@vttoulu.tko.vtt.fi (Jorg-Michael Hasemann) writes:

>   Hello,

>   I would like to get some information about the (bidirectional)
>   parallel port. I know that the standard printer port is uni-
>  directional only. However, newer printer port more and more
>  often support bidirectional modes, i.e. writing *and* reading
>  from pins D(0)-D(7).


>   E.g. PS/2 printer ports *are* bidirectional.

>   My question is now, how to test whether my printer card supports
>   a bidirectional printer port (e.g. PS/2 mode printer port) and
>   how to actually read data from the printer port.

>   I also would love to get information about the electrical charac-
>   teristics of the bidirectional printer port.

>   best wishes,

>   michael

>   P.S.: I checked the FAQ (w/o success).

You NEED the "Parallel Port FAQ", available via anonymous ftp to:
  ftp.armory.com /pub/user/rstevew/ibmlpt.faq

Also for invaluable information, including EPP/ECP IEEE-1284, etc. 
  Parallel Technologies, Inc.
  18080 NE 68th, #A-100
  Redmond, WA 98073-0007
  (206)869-1136
  (206)869-9767 (FAX)
Check out their parallel port diagnostics+, available via anonymous ftp to: 
  oak.oakland.edu:/SimTel/msdos/io_util/para13.zip

Good Luck!
--
*******************************************************************
Brent Boghosian, AT&T-GIS       Brent.Boghosian@Waterloo.ATTGIS.com
(519)884-1710 Ext.5719

 "It's not the gift or thought, 
                           it's the fingers that count."  [Bolder-]

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