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So, the version of the LX Palmtop might make a difference here. The
95LX, as I recall, was like 95% of an IBM PC in terms of
compatibility and specs. The screen wasn't a full CGA in
resolution, though I think it had a zoom mode for some apps that
would scale it. There were some other things too about the DOS
implementation, but I don't recall the details. I just remember the
100LX was the first full IBM PC compatible in a palmtop format.<br>
<br>
I've personally not run APRS DOS on any machine, but I was able to
get a Baycom Packet system to run on my 100LX some years ago. One
trick for that was to turn off the machine's internal "cat nap"
sleep function, in order to keep the bit timing accurate. The micro
snoozing that the machine does to conserve battery power made a bit
of a mess of the COM port timing, since Baycom did its own bit
stuffing out one of the modem lines. Oh, and the 95XL doesn't have
the full set of modem lines. It does have a 5 pin connector, so
there might have been a pair for flow control (DSR / DTR?), beyond
just TX, RX, and Ground. Not sure about those. The 100LX and 200LX
had full modem ports. That might be why you need the added COM port
for the 95LX. As I said, it's a 95% solution, but that last 5% can
be significant.<br>
<br>
Good luck!<br>
<br>
Greg KO6TH<br>
<br>
<br>
<div class="moz-cite-prefix">R Kirk via aprssig wrote:<br>
</div>
<blockquote type="cite"
cite="mid:275013508.2639187.1575639669631@mail.yahoo.com">
<div style="color:black;font: 10pt arial;">
<div>Yes, it can work. Years ago I ran APRS DOS on an HPLX as a
'what if' project as a car mobile system. Forgotten the
details but it's pretty straightforward. You do need a second
COMM port so I used a COMM port card in the PCMCIA slot.</div>
<div>Bob N3OZB</div>
<div><br>
</div>
<br>
<div
style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original
Message-----<br>
From: Robert Bruninga <a class="moz-txt-link-rfc2396E" href="mailto:bruninga@usna.edu"><bruninga@usna.edu></a><br>
To: TAPR APRS Mailing List <a class="moz-txt-link-rfc2396E" href="mailto:aprssig@lists.tapr.org"><aprssig@lists.tapr.org></a><br>
Cc: Abraham Moller <a class="moz-txt-link-rfc2396E" href="mailto:molleraj@gmail.com"><molleraj@gmail.com></a>; Scott Haley
<a class="moz-txt-link-rfc2396E" href="mailto:kshaley@aep.com"><kshaley@aep.com></a><br>
Sent: Thu, Dec 5, 2019 9:27 pm<br>
Subject: Re: [aprssig] de kd5njr re DOS version of APRS<br>
<br>
<div id="yiv5315151825">
<div dir="ltr">
<div dir="ltr">Lets forward this to the APRSSIG?<br>
</div>
<br>
<div class="yiv5315151825gmail_quote">
<div class="yiv5315151825gmail_attr" dir="ltr">On Thu,
Dec 5, 2019 at 6:01 PM Scott Haley <<a
href="mailto:kshaley@aep.com" target="_blank"
rel="noopener noreferrer"
ymailto="mailto:kshaley@aep.com"
moz-do-not-send="true">kshaley@aep.com</a>>
wrote:<br>
</div>
<blockquote class="yiv5315151825gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex;">
<div lang="EN-US">
<div
class="yiv5315151825gmail-m_5997318286370901910WordSection1">
<div class="yiv5315151825MsoNormal">Hi Bob,</div>
<div class="yiv5315151825MsoNormal"> </div>
<div class="yiv5315151825MsoNormal">Got a moment
for an OLD question ?</div>
<div class="yiv5315151825MsoNormal"> </div>
<div class="yiv5315151825MsoNormal">Friend of mine
and myself have come across the old DOS HP95LX
palmtop computers. The ones that run of AA
batteries.</div>
<div class="yiv5315151825MsoNormal"> </div>
<div class="yiv5315151825MsoNormal">Grayscale
screen. Resolution is kinda like CGA (
displaying ¼ of the screen at once, as I recall
) .<br>
<br>
We also have a later version that doesn’t have
such a kludgey screen. </div>
<div class="yiv5315151825MsoNormal"> </div>
<div class="yiv5315151825MsoNormal">Do you
remember anyone running ARPS on them ?<br>
<br>
I’m sure folks talked to TNCs with them (
packet) . They have a nice terminal emulator
that I use to talk to my laptop no problem.
<br>
But I was curious about APRS.</div>
<div class="yiv5315151825MsoNormal"> </div>
<div class="yiv5315151825MsoNormal">73</div>
<div class="yiv5315151825MsoNormal">Scott</div>
<div class="yiv5315151825MsoNormal">Kd5njr</div>
<div class="yiv5315151825MsoNormal"> </div>
<div class="yiv5315151825MsoNormal"> </div>
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<div class="yiv5315151825MsoNormal"><b><span
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HALEY</span></b><span
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