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From: jbn@wdl1.UUCP
Newsgroups: net.micro
Subject: Re: Wang PCs and printers
Message-ID: <297@wdl1.UUCP>
Date: Wed, 30-May-84 21:07:02 EDT
Article-I.D.: wdl1.297
Posted: Wed May 30 21:07:02 1984
Date-Received: Wed, 6-Jun-84 02:26:31 EDT
Lines: 13


     The Wang PC comes with two ports standard on the CPU card, an RS-232
serial port and a Centronics-compatible parallel port.  Both work fine with
non-Wang peripherals.  I did the port of AutoCAD, the drafting package to
the Wang PC, and have run printers, plotters, and mice off the machine, none
made by Wang.  All devices were driven by AutoCAD drivers, though, not by the
BIOS.
     One thing to be wary of; the RS-232 port is really RS-232, and insists
that the input levels swing outside the +2 to -2 volt range before anything
will happen.  Input levels of 0 and +5 will not work; the low level must
go down to at least -2v or so, preferably -5.  +5 to -5 works fine.  Some
low-rent peripherals don't have a minus supply, and cause problems.  I
had problems getting a Logimouse to work on the serial port, but the problem
was in our Logimouse adapter, not in the mouse itself.