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From: wmartin@brl-tgr.ARPA (Will Martin )
Newsgroups: net.unix-wizards,net.info-terms
Subject: Re: VT100/VT132 & ins/del line/char
Message-ID: <3513@brl-tgr.ARPA>
Date: Mon, 23-Jul-84 16:05:15 EDT
Article-I.D.: brl-tgr.3513
Posted: Mon Jul 23 16:05:15 1984
Date-Received: Fri, 27-Jul-84 07:11:26 EDT
References: <591@pitt.UUCP>
Organization: Ballistics Research Lab
Lines: 16

Re adding printer ports to plain VT-100's:

Maybe everybody already knows this, but I thought I'd pass it along, as it 
burned us when we got plain VT-100s with the printer-port option 
installed: Adding this disables the sending of CTRL-s & CTRL-Q from
the keyboard down the communications line. This is not stated clearly
in the documentation (or wasn't several years ago when we got these).
The option snags the CTRL-S/CTRL-Q and uses them for controlling the
printer-port line. We needed to be able to send CTRL-Q down the line
to tell a TAC what speed we ran at; we found out that we had to go
into Set-up mode, do a Reset (key zero), and this would send a CTRL-S,
for flowcontrol while the reset was in progress, following up with a CTRL-Q.
That last CTRL-Q was caught by the TAC as required. 

Will Martin
USArmy DARCOM ALMSA