Newsgroups: comp.sys.acorn
Path: utzoo!utgpu!watserv1!watdragon!gcwilliams
From: gcwilliams@watdragon.waterloo.edu (Graeme Williams)
Subject: Re: Mode 21 and an NEC 3D Multisync monitor
Message-ID: <1991Jan8.214959.7587@watdragon.waterloo.edu>
Summary: Mode 21 not displayed properly
Sender: gcwilliams@watdragon.waterloo.edu
Organization: University of Waterloo
Date: Tue, 8 Jan 91 21:49:59 GMT
Lines: 22

Well having read through lots of Mode 21 discussion it occured to me
that someone might know the answer to the following problem:

I have an NEC 3D monitor which I use with both my A310 and with
a (rarely used of course!) 80386 PC. When the Arc is in Mode 21
the NEC 3D refuses to display the screen properly, namely it is
displaced by about a half screen width to one side. (The undisplayed
area actually gets wrapped around and appears on the other side of
the display). *NO* amount of fiddling with the various monitor
controls to centre the screen will alleviate the problem - they're
just not designed to move the screen much more than an 1/8 to a 1/4
of a screen sideways. Consequently I can't use Mode 21.

Question: Am I missing something? Is the NEC 3D monitor incompatible
          with Mode 21? Or is my 3D monitor somehow faulty/not set
          up right inside? Or last (and hopefully least!) is my A310
          not performing properly?

Ideas anyone?

Graeme Williams
gcwilliams@watdragon.waterloo.edu