15 Dec
2015
15 Dec
'15
9:42 a.m.
On 2015-12-15 11:27 AM, Paul Koning wrote:
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.
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.
paul