On 2015-12-15 11:27 AM, Paul Koning wrote:
On Dec 15, 2015, at 12:54 AM, Paul Birkel <[email protected]> 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.
paul
They used a 6 bit code with odd parity so some of the code sheets refer
to it as a 7 bit code because they include the "C" parity bit.
Paul.
