🚀 go-pugleaf

d...@ihatespam.msu.edu (Dennis Boone) writes:
> Nonsense.  People were _building their own_ terminal concentrators
> (and then hooking dialup pools to them) at least as long ago as the
> 60s, and IBM already sold same then.

CP/67 delivered to univ jan1968 had 2741 & 1052 terminal support with
automatic terminal type identification. Univ. had some number of
TTY/ascii ... so I added tty/ascii in such a way that it did automatic
terminal type across 2741, 1052 & TTY/ascii. I then wanted to have
single dial-in number (hunt-group) for all terminals. It wouldn't work
with ibm terminal controllers because while it was possible to change
the (terminal) type of line scanner per port ... port/line speeds were
hardwired; needed one hunt-group for 2741&1052 and another for tty/ascii
https://en.wikipedia.org/wiki/Line_hunting

this somewhat motivated univ. to start clone controller project ...  did
a channel interface board for interdata/3 programmed to emulate IBM
terminal type controller ... with the addition of doing automatic
line/terminal speed. This was later upgraded to interdata/4 with the
channel interface and cluster of interdata/3s for port/line scanners.
Interdata (and later Perkin/Elmer) marketed this implementation and four
of us got written up for (some part of) clone controller business past
posts:
http://www.garlic.com/~lynn/subtopic.html#360pcm

Univ. of Michigan did something similar for their 360/67 running MTS
(but using PDP):
http://www.eecis.udel.edu/~mills/gallery/gallery7.html
http://www.eecis.udel.edu/~mills/gallery/gallery8.html

-- 
virtualization experience starting Jan1968, online at home since Mar1970