Path: utzoo!utgpu!jarvis.csri.toronto.edu!torsqnt!tmsoft!masnet!canremote!bradley.grigor
From: bradley.grigor@canremote.uucp (BRADLEY GRIGOR)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Desqview and SVGA
Message-ID: <90030820223327@masnet.uucp>
Date: 18 Feb 90 10:35:00 GMT
Organization: Canada Remote Systems Limited, Mississauga, ON, Canada
Lines: 31

dhinds@portia.Stanford.EDU (David Hinds) writes:

dD>This is not directly connected to the previous postings in this
dD>series,  but I am having some trouble with Desqview-386 and an ATI
dD>VGA Wonder card running in mono VGA mode.  To make the best use of
dD>all my memory, I've given the B8000-BFFFF area to QEMM to remap. 
                                 ^^^^^^^^^^^
dD>When I am in Desqview, the screen sometimes rolls 1 pixel to the
dD>left; i.e., a single column of pixels from the left edge of the
dD>screen shifts over to the right edge. This never happened when I set
dD>up the card to use color.  Outside Desqview, with QEMM installed, I
dD>have no trouble running graphics programs that switch between
dD>monochrome text and greyscale graphics.  When I run these in
dD>Desqview, however, they now fail when they try to switch OUT of
dD>graphics modes.  They completely lock the machine.  In particular,
dD>the shareware GIF viewer CSHOW has this problem.  Turning off
dD>virtualization of the screen didn't seem to make any difference.  Any
dD>ideas?

You cannot assume that these addresses can be INCLUDED.  I know
of some programs (for example, when the 3d chess program CYRUS
returns to DOS) that cause the ATI VGA Wonder card to "switch"
through those addresses, causing the system to lock up.  To be
sure, EXCLUDE those addresses, run DESQview as you describe, then
look at the QEMM ACC MAP report.  I think you'll find that those
addresses HAVE been Accessed (and possibly Written).

bradley.grigor@canremote.uucp  :  ALEX is coming to Toronto in April.
Newmarket, Ontario, Canada     :  TelePoker will be there - will YOU?
---
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