IBM Selectric-based Terminals
tmfdmike at gmail.com
Tue Dec 15 14:05:51 CST 2015
On Wed, Dec 16, 2015 at 4:27 AM, Paul Koning <paulkoning at comcast.net> wrote:
>> On Dec 15, 2015, at 12:54 AM, Paul Birkel <pbirkel at gmail.com> wrote:
>> I believe that the Selectric came configured for remote operation, but presumably using an EBCDIC-based data stream. I vaguely recall a DB-50 connector, but it's been an awfully long time ...
>> Does this description sound familiar to anyone?
> For a while, RSTS/E supported 2741 terminals, which are Selectric terminals with a UART interface. It wasn't EBCDIC -- instead, it had one of several possible conversion tables. I forgot the number of bits per character. Also, the speed used was peculiar: 134.5 bits per second. 2741 support was dropped at some point; I think V7 has it but it disappeared by V9 if not sooner.
That IS interesting. I have two 2741s - one mostly working, needs a
little mechanical fettling, one untested but believed needing work. It
seems I could bring up a pre-V7 RSTS and incant the right runes at it
and the 2741 would Just Work.
What other OSes might have native 2741 support built in, anyone know?
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