Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!tut.cis.ohio-state.edu!ucbvax!agate!stanford.edu!morrow.stanford.edu!news
From: GD.SAR@forsythe.stanford.edu (Sandy Rockowitz)
Newsgroups: comp.os.os2.misc
Subject: Re: Parallel Ports and OS/2
Message-ID: <1991Mar25.161522.14882@morrow.stanford.edu>
Date: 25 Mar 91 16:15:22 GMT
Sender: news@morrow.stanford.edu (News Service)
Distribution: usa
Organization: Data Center, Stanford University, California, USA
Lines: 15

In article <1991Mar24.085133.8746@eecs.wsu.edu>,
wbonner@eecs.wsu.edu (Wim Bonner) writes:
>
>Just wondering, but where does the port on an IBM (Or Herc) monochrome
>card show up?  And how does the other port in the machine work as port 2
>automaticly when that port is in the machine, but If I pull the mono card
>it acts as port 1?

The port address on an IBM mono card if fixed at 3BC.  If the
BIOS detects a parallel port at that address, it becomes
LPT1, and 378 and 278 become LPT2 and LPT3.  Otherwise,
378 becomes LPT1 and 278 becomes LPT2.

Sandy Rockowitz
gd.sar@forsythe.stanford.edu