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From: jbryans@beach.csulb.edu (Jack Bryans)
Newsgroups: comp.sys.next
Subject: Re: How to generate BREAK code?
Message-ID: <JBRYANS.91Mar5142822@beach.csulb.edu>
Date: 5 Mar 91 22:28:22 GMT
References: <846@lychee.cs.utexas.edu> <446@heaven.woodside.ca.us>
Sender: jbryans@beach.csulb.edu (Jack Bryans)
Organization: Cal State Long Beach
Lines: 12
In-Reply-To: glenn@heaven.woodside.ca.us's message of 5 Mar 91 04:52:06 GMT

In article <446@heaven.woodside.ca.us> glenn@heaven.woodside.ca.us (Glenn Reid) writes:
>  I believe that control-@ (which is control-shift-2) will generate the BREAK
>  character.  At least that used to do the trick on other UNICES I've used.

^@ is the null character.  It's value is 0, regardless of radix :-).
A break isn't an ASCII character -- it's the absence of any signal on the
serial line for some period of time.  Short & long breaks may be recognized &
differentiated by some comms equipment.  I forget the timing, but the usual
(short) break is around .25 - .5 sec. & the long one around .75 + or - lord
knows what for absent mindedness.

Jack