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Path: utzoo!decvax!wanginst!ucadmus!harvard!seismo!hao!haynes
From: haynes@hao.UUCP (Dan Haynes)
Newsgroups: net.unix
Subject: Re: Info sought on sending ascii NULL on output
Message-ID: <1390@hao.UUCP>
Date: Fri, 8-Mar-85 12:34:07 EST
Article-I.D.: hao.1390
Posted: Fri Mar  8 12:34:07 1985
Date-Received: Sun, 10-Mar-85 02:25:02 EST
References: <1381@hao.UUCP>
Distribution: na
Organization: High Altitude Obs./NCAR, Boulder CO
Lines: 17
Xref: seismo net.unix:4065

> I was trying to download some graphics commands from a Vax 4.2 system
> to an inkjet printer over a tty line.  This particular printer requires
> a special sequence to put it in graphics mode; one of the characters in
> this sequence is an ascii null.  All attempts thus far to get a null
> char output have failed.  There does not seem to be any problem outputting
> any other control char (in RAW mode).  If anyone can provide me with
> a clue to a method to get a null on output, please send me mail.

I have solved the "no nulls on output over a tty line" problem.
It turned out that the particular terminal I was testing this on,
a Wyse 50, treats nulls as a no-op even in MONITOR mode.  Hooking
a scope up to the receive line proved this.

Dan Haynes
haynes%ncar@csnet-relay.arpa	ARPA
haynes@ncar.csnet		CSNET
hao!haynes			UUCP