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On 25-May-20 09:29, Bob Supnik wrote:<br>
<blockquote type="cite"
cite="mid:7534beec-4283-cdf3-bdb0-620cc46d2f62@supnik.org">Looking
through the XVM/MUMPS15 listing, I saw that the timesharing
terminals were attached via a DC01 communications multiplexer.
There's no reference to such a device anywhere in the 18b
literature on Bitsavers.
<br>
<br>
Because the PDP15 is a contemporary of the PDP8/I and the KI10, I
thought it might be a variant of their multiplexers, but I can't
find a match.
<br>
<br>
Another mystery.
<br>
<br>
/Bob
<br>
<br>
</blockquote>
The DC01 was a CSS product. Option/module reveals that it was
adapted for the 8, 9, 15 & 11. You may find some hints in the
other families, though as you know, registers tend to have family
ties...<br>
<ul>
<li>DC01-AA 8 line scanner full duplex tty &/or EIA \<br>
</li>
<li>DC01-AB 8 TTY scanner half duplex \ 8
POS<br>
</li>
<li>DC01-AC 8 Asyn scan full duplex EIA 3 cycle /<br>
</li>
<li>DC01-AL Full duplex line unit for DC01-AA</li>
<li>DC01-BB 8 TTY line scanner 1/2 duplex echo PDP-9<br>
</li>
<li>DC01-EA 8 Line scanner full duplex (tty &/or
EIA) \<br>
</li>
<li>DC01-EB 8 TTY line scanner half duplex echo +
logic \ 15<br>
</li>
<li>DC01-EC 8 Line async scan full duplex EIA 3
cycle /<br>
</li>
<li>DC01-ED 8 Line async scan, half duplex echo tty or EIA Sep.
speeds /<br>
</li>
<li>DC01-FA 8 line scanner full duplex (TTY &/OR EIA) \</li>
<li>DC01-FD Improved
DC01-FA \ 11<br>
</li>
<li>DC01-FJ 32 line scanner, full duplex, can use any DF11
interface<br>
</li>
</ul>
<p>Responsible engineers: B. Vachon, Bill Weiske, D. Hopkins, J.
Larkin, Reg Wetherall, J. Stefanowicz, Russ Moore<br>
</p>
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