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Path: utzoo!mnetor!seismo!mcvax!asic001!ron
From: ron@asic001.UUCP (Ron Werther)
Newsgroups: comp.unix.wizards
Subject: modem control on DHV11 and DZQ11
Message-ID: <252@asic001.UUCP>
Date: Mon, 25-May-87 12:54:21 EDT
Article-I.D.: asic001.252
Posted: Mon May 25 12:54:21 1987
Date-Received: Wed, 27-May-87 00:54:26 EDT
Reply-To: ron@asic001.UUCP (Ron Werther)
Distribution: world
Organization: Advanced Silicon Corporation, Nijmegen, the NETHERLANDS
Lines: 29

> -Guy Middleton, University of Waterloo MFCF/ICR, gamiddleton@watmath
>writes:
>We have a Microvax-II with a DHV11.  We're using the DHU driver from
>Berkeley, running 4.3BSD.  The DHV passes its hardware diagnostics perfectly.
>However, when the system is running, the DHV completely ignores modem
>controls (DTR, CTS, RTS and DCD).  Debug code in the driver shows that the
>board thinks it is asserting DTR at the right times (when in fact DTR is
>*never* raised).  Also the board never sees DCD.  Has anybody else seen
>this?  We're starting to get a bit annoyed here...

The problem discribed by Guy Middleton above also affect our systems:
	microvax II with DHV11 running Ultrix 1.2

	but same problem shows up when using DZQ11 boards

this situation is very inconvinient because you never can detect
if a printer or plotter is switched off.
Because the systems thinks there is a working device on 
that tty-line, your output get lost.

Has anybody solved this problem ?

-ron
--
Ron Werther   PA3DSO             |          /~~~/   /~~~        /~~~ 
Advanced Silicon Corporation     |         /   /   /       *   /
NIJMEGEN, THE NETHERLANDS        |        /~~~/    ~~~/       /
tel. 3180228212                  |       /   /       /   /   /
..!mcvax!asic001!ron             |      /   /    ___/   /   /___.