[GreenKeys] Asr33: How are BREAK encoded ?

[Jbensadon]

I generally do not press buttons that say "Break", "Fire" or "Self Destruct".


But yeah, Break is like a break in the line for a short period of time (no current)


I wonder if the "HERE IS" button serves as a break?  It certainly works to advance the tape without any marks.


Josh Bensadon

Toronto, Canada



________________________________
From: GreenKeys <greenkeys-bounces at mailman.qth.net> on behalf of Wayne Durkee <teletypeparts at comcast.net>
Sent: Tuesday, February 21, 2017 12:41 PM
To: GREENKEYS BULLETIN BOARD; Jones, Douglas W; Julien Scrofani
Subject: Re: [GreenKeys] Asr33: How are BREAK encoded ?

I am not a computer guy, but Break is something used with your computer, not the Teletype although TWX machines had a Break key, but I have forgotten what it was for.

Wayne

On February 21, 2017 at 6:31 AM Julien Scrofani <julien.scrofani at gmail.com> wrote:

Hi guys,

Thank you for your responses.

The start and stop units are not parts of the punched code on the tape, right ?
How then, when I read the tape, does the adapter convert these sequences into BREAK sequences ?

Julien

Le mar. 21 févr. 2017 à 05:05, Jones, Douglas W <douglas-w-jones at uiowa.edu<mailto:douglas-w-jones at uiowa.edu>> a écrit :
From: Julien Scrofani [julien.scrofani at gmail.com<mailto: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<mailto:jones at cs.uiowa.edu>
______________________________________________________________
GreenKeys mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:GreenKeys at mailman.qth.net

2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to teletypeparts at comcast.net


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20170221/2f43ea02/attachment.html>