On 12 February 2014 18:29, 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?
As was said before, a model 33 is 110 baud, 7 data, 1 parity (even or
mark), and 2 stop bits. For a speed of 10 characters per second.
The printer doesn't care about the parity bit (so imagine it as a 7N3
device), the keyboard is the only part that cares about -- in this
case, it produces -- the parity bit, and depending on options can
either be mark or even parity. The punch and the reader are 8-bit
clean, so are 8N2 devices.
It was 7bit encoding and the usual setup was 8n2, I know
of no serial
device that did 7N3.
Also the keyboard was Odd/Even/Stick (or no parity).
IT was the same for keyboard and printing as the Punch was 8 Level
And the 8th level was parity in some systems but data for others.
It was 110 baud. To many years of maintaining and using one.
Allison