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Re: Origin Of The Autobaud Technique

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Lynn Wheeler <lynn@garlic.com> writes:
> initial (virtual machine) CP/67 delivered to univ had 1050&2741
> terminal type support with automagic terminal type
> recognition. Univ. had ascii TTY (mostly 33, but some 35), so I added
> ascii terminal support integrated with automagic terminal type
> recognition (able to use the SAD CCW to switch the terminal type line
> scanner for each line/port). I then wanted a single dial-in number
> ("hunt group") for all terminal types ... but while the terminal type
> line scanner could be switched for each port, IBM had hard-wired the
> port line speed ... thus kicked-off the univ project to build our own
> clone controller that also did "autobaud".

trivia: turn of century had tour of datacenter that handled majority of
dial-up POS credit card swipe terminal calls east of the mississippi ...
the telecommunication controller was descendant of what we had done in
the 60s ... some question that the mainframe channel interface card was
same design we had done more than three decades earlier.

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

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Origin Of The Autobaud Technique Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-11-16 06:34 +0000
  Re: Origin Of The Autobaud Technique Lynn Wheeler <lynn@garlic.com> - 2024-11-15 21:52 -1000
    Re: Origin Of The Autobaud Technique Lynn Wheeler <lynn@garlic.com> - 2024-11-15 22:08 -1000

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