In article <CAFrGgTQvkz-TX=ZrJdYCEaO3yZu6=B-=JhJPiwaukfNmwCxQJw at mail.gmail.com>,
Eric Smith <spacewar at gmail.com> writes:
On Feb 12, 2014 4:32 PM, "John Ball"
<ball.of.john at gmail.com> wrote:
Just to confirm what I'm finding for a
project, model 33's communicate at
110 baud, 7 data bits, even parity and 1 stop bit. Correct?
Two stop bits are required when sending to a model 33. They may send even
parity (7E2), or (more commonly) "mark parity" (7M2), which isn't actually
parity. The printer ignores received parity. For tape operations, the
parity bit is passed unchanged, so it can be viewed as 8N2 (8 bits with no
parity).
Which of these your ASR33 will do depends on which options are
installed in the teletype.
Teletype machines are mostly electromechanical and the choices are
determined by which physical options are installed, as opposed to most
terminals where all this stuff is controlled electrically and set via
DIP switches or NVRAM settings.
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