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<p>Was 11/D what also ran in DN20's? The DECSYSTEM-20 was actually
a cluster of computers with the PDP-10 being connected to up to
four 11/40's (or 34?) via interfaces called DTE's. The DN20 was a
repackaged PDP-11 (34?) and they were incredibly useful.</p>
<p>CU20B, our largest system, had three such units:</p>
<ol>
<li>Front-end PDP-11, ran a variant of RSX called 20F and handled
communications lines, unit record equipment and (I believe) the
AN20 ARPAnet IMP interface.</li>
<li>DECnet DN20; we had lines to other 20's (KMC11's) before we
got Ethernet, plus a line to a VAX and a DN200 RJE.</li>
<li>DN65, used for IBM/HASP communications. I had source to the
DN65, but I can not remember for the life of me whether it was
an RSX variant or custom code. That's surprising because I had
to make some modifications to have it talk with one of our
4341's.</li>
</ol>
<p>I have heard a site (I believe it was Case Western) that had a
fourth PDP-11 serving as a communications concentrator for more
lines (DH11's). One shudders to think of a 20 with that many
users. Things got pretty slow at 50 and once you got up to 70, it
was time to find something else to do.<br>
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cite="mid:4A8EBA77-B3FE-42BD-B8A6-A0DD3FE675F1@forecast.name">
<hr width="100%" size="2">On 12/20/19 6:12 PM, John Forecast
wrote:
<pre class="moz-quote-pre" wrap="">Yes, both DECnet-IAS and DECnet-11/D existed, I was the project lead for the initial phase II releases (I think there was an updated release later on).
DECnet for RSX-11/D was also one of the initial phase I releases, I used it at a customer site in Sweden.
John.
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<pre class="moz-quote-pre" wrap="">On Dec 20, 2019, at 5:00 PM, Paul Koning <a class="moz-txt-link-rfc2396E" href="mailto:paulkoning@comcast.net"><paulkoning@comcast.net></a> wrote:
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<pre class="moz-quote-pre" wrap="">Did that exist? I'm fairly sure it did. What about DECnet for RSX-11/D? Not so sure about that one.
paul
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<pre class="moz-quote-pre" wrap="">On Dec 20, 2019, at 3:46 PM, Lee Gleason <a class="moz-txt-link-rfc2396E" href="mailto:lee.gleason@comcast.net"><lee.gleason@comcast.net></a> wrote:
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<pre class="moz-quote-pre" wrap="">If you run across anyone with DECET-IAS, please let me know...
<blockquote type="cite"><hr width="100%" size="2"><pre class="moz-quote-pre" wrap="">On 2019-12-20 1:12 PM, Thomas DeBellis wrote:
Do I have any volunteers who operate something besides VMS? I'd be interested in RSX(+), IAS, RSTS and OS-8. They never did DECnet on RT-11, did they?</pre></blockquote></pre>
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