Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watmath!clyde!rutgers!husc6!hao!gatech!mcnc!seismo!mcvax!asic001!ron
From: ron@asic001.UUCP
Newsgroups: comp.unix.wizards,comp.bugs.4bsd
Subject: lack of modem control on MVAX-II with DHV running 4.3bsd
Message-ID: <312@asic001.UUCP>
Date: Tue, 26-May-87 09:29:02 EDT
Article-I.D.: asic001.312
Posted: Tue May 26 09:29:02 1987
Date-Received: Thu, 28-May-87 06:59:47 EDT
Reply-To: ron@asic001.UUCP (Ron Werther)
Distribution: world
Organization: Advanced Silicon Corporation, Nijmegen, the NETHERLANDS
Lines: 34
Xref: utgpu comp.unix.wizards:2264 comp.bugs.4bsd:345

> -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.

I think someting that could cause this is the initiation of the
flags from the DHV and DZQ devices in the configuration file.
Has anybody tried this allready ?

A second question: is it possible to fix this without rebuilding a new
kernel ?

-ron
--
Ron Werther   PA3DSO             |          /~~~/   /~~~        /~~~ 
Advanced Silicon Corporation     |         /   /   /       *   /
NIJMEGEN, THE NETHERLANDS        |        /~~~/    ~~~/       /
tel. +31 80228212                |       /   /       /   /   /
..!mcvax!asic001!ron             |      /   /    ___/   /   /___.