[GreenKeys] Asr33: How are BREAK encoded ?

Jones, Douglas W douglas-w-jones at uiowa.edu
Mon Feb 20 23:05:30 EST 2017


From: Julien Scrofani [julien.scrofani at gmail.com] Monday, February 20, 2017 2:09 PM

> I taped several BREAK sequences with the tty puncher, pressing my finger more or less time on the key.  The punched codes differ a lot (see pic). When I read the tape, toward my terminal via the usb current loop adapter, all BREAK are correctly converted.
Are they coded with several bits patterns ? If not, how are they interpreted correctly by the adapter ?

The adapter recognizes break by the lack of a stop bit at the end of the character, not by the bit pattern.

                Doug Jones
                jones at cs.uiowa.edu
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