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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.unix-wizards
Subject: Re: Help with LA100 Letterprinter
Message-ID: <9554@brl-tgr.ARPA>
Date: Thu, 28-Mar-85 16:13:57 EST
Article-I.D.: brl-tgr.9554
Posted: Thu Mar 28 16:13:57 1985
Date-Received: Tue, 2-Apr-85 05:13:05 EST
References: <212@spock.UUCP>
Organization: Ballistic Research Lab
Lines: 8

> ...  The printer seems to be
> allowing the incomming data to overload its input buffer. It then emits
> a series of beeps and prints garbage.  ...

I don't think your problem is in switch setting, but rather in the need
to enable DC3/DC! (XOFF/XON) flow control on the terminal port.  This
is done by setting the LITOUT mode and leaving the port in "cooked"
(non-RAW) mode with DECCTLQ set so that flow control is done.