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<div class="moz-cite-prefix">Unless you have my (experimental) patch
to SETHOST, the test below will give you a false negative as the
remote host is checked for 36 bitness and that specific message is
given. This is case with the default PANDA nor the current DEC
distribution. If you remove the test, you get the following
results for RSX and VMS.</div>
<div class="moz-cite-prefix">
<p><tt>!g new:sethost<br>
!staRT (PROGRAM) <br>
% Do not have Control-C capability, proceeding...<br>
Escape character(^Y):<br>
Host name: MIM<br>
[Connecting to remote host: MIM]<br>
[Remote system is running RSX-11M]<br>
[Connected: type ^Y to return to node VENTI2]</tt><br>
<tt><tt><br>
<br>
Back at node VENTI2, connection broken - Reject or
disconnect by object</tt></tt><tt><tt><br>
</tt>!staRT (PROGRAM)<br>
% Do not have Control-C capability, proceeding...<br>
Escape character(^Y):<br>
Host name: LEGATO<br>
[Connecting to remote host: LEGATO]<br>
[Remote system is running VMS]<br>
[Connected: type ^Y to return to node VENTI2]<br>
<br>
<br>
Back at node VENTI2, connection broken - Reject or disconnect
by object</tt><br>
</p>
</div>
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p>
<hr width="100%" size="2">On 5/5/20 9:52 AM, R. Voorhorst
wrote:</o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"> R.
Voorhorst [<a class="moz-txt-link-freetext" href="mailto:R.Voorhorst@swabhawat.com">mailto:R.Voorhorst@swabhawat.com</a>] <br>
<b>Sent:</b> Tuesday, 05 May, 2020 12:04<br>
<b>To:</b> '<a class="moz-txt-link-abbreviated" href="mailto:owner-hecnet@Update.UU.SE">owner-hecnet@Update.UU.SE</a>'
<a class="moz-txt-link-rfc2396E" href="mailto:owner-hecnet@Update.UU.SE"><owner-hecnet@Update.UU.SE></a><br>
<b>Subject:</b> RE: [HECnet] More NRT --> VMS and
others<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi
Thomas,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I
use NRT frequently on the older systems as CTERM does not
work well with them; often bursty IO.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">On
VAX/VMS, NRT usually works well, at least as host and
cooperates well with Tops10/Tops20 Panda.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Also
on Rsx11M and Rsts 10.1.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Sethost
on Tops20 Panda to VMS however does not:<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">sethost<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Escape
character(^Y):<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Host
name: swbv89<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">?
Communication with VMS not supported by SETHOST<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Even
on OpenVms alpha 8.3 it works to vax, however with
connection to tops10/20, the process crashes with an
exception.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Maybe
it could be repaired on Alpha, but I doubt sufficient
sources are around.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">You
can test initial connect on Swbv55 on hecnet when it is up,
as it is a VAX VMS 7.3 hecnet area router, though you cannot
login on it (yet?).<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Best
regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">R.V.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <a
href="mailto:owner-hecnet@Update.UU.SE"
moz-do-not-send="true">owner-hecnet@Update.UU.SE</a> [<a
href="mailto:owner-hecnet@Update.UU.SE"
moz-do-not-send="true">mailto:owner-hecnet@Update.UU.SE</a>]
<b>On Behalf Of </b>Thomas DeBellis<br>
<b>Sent:</b> Tuesday, 05 May, 2020 07:14<br>
<b>To:</b> <a href="mailto:hecnet@Update.UU.SE"
moz-do-not-send="true">hecnet@Update.UU.SE</a><br>
<b>Subject:</b> [HECnet] More NRT<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>What's fun about the Tops-20 NRT client (SETHOST) is that it
doesn't do much aside from parsing for an escape character and
node name. It builds a connection string and checks to make
sure the remote system is either a 10 or a 20. Then it
twiddles a few things on the terminal (a few more if you're
running my changes to handle page mode). Finally, and this is
the cool part, it issues an MTOPR% to directly connect the
local user's terminal to the open DECnet connection (port 23).<o:p></o:p></p>
<p>Thereafter, the client does nothing until the interrupt
character is typed or the connection is broken. So response
can be pretty snappy because you are never running in user
space; no context switching. The CTERM client on the other
hand is reading and writing data and otherwise handling the
specifics of the protocol in user space. So, more overhead
and more context switching.<o:p></o:p></p>
<p>As an experiment, I removed the checks for Tops-10 and
Tops-20 and tried connecting to a few hosts on HECnet.<o:p></o:p></p>
<ul type="disc">
<li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
level1 lfo3">Tops-20; TOMMYT and TWENEX worked (of course)<o:p></o:p></li>
<li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
level1 lfo3">Tops-10; VENTI worked<o:p></o:p></li>
<li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
level1 lfo3">RSX-11+; MIM accepted the connection and broke
it as soon as I started typing. <o:p></o:p></li>
<li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
level1 lfo3">VMS; LEGATO accepted the connection and broke
it as soon as I started typing.<o:p></o:p></li>
<li class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0
level1 lfo3">RSTS; TRON accepted the connection and then did
nothing. It never broke the connection, but never displayed
any banner or anything else. It appeared hung.<o:p></o:p></li>
</ul>
<p>So it would appear that NRT servers only exist on the 36 bit
line. Perhaps it's possible to configure the service for
other platforms?<o:p></o:p></p>
<p>The first few RSTS systems I tried didn't appear to be
online; MEZZO, PLUTO, RSTSE and BITXOT. The few Windows
systems I checked didn't appear to be online, either; WXP,
MISSY, KIBBEH and WATAN. I'm not sure if that means they
refused the connection attempt outright.<o:p></o:p></p>
<p><o:p> </o:p></p>
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