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From: knight@mrco.carleton.ca (Alan Knight)
Subject: Re: Envy/VisualWorks Hangs under Windows
Message-ID: <CyECyE.ByB@cunews.carleton.ca>
Sender: news@cunews.carleton.ca (News Administrator)
Organization: Carleton University, Ottawa, Canada
References: <389805$m6c@bcarh8ab.bnr.ca> <38ccc6$k8q@ocean.CAM.ORG> <38nvq1$k5r@network.cc.jyu.fi>
Date: Fri, 28 Oct 1994 19:03:50 GMT
Lines: 31

In article <38nvq1$k5r@network.cc.jyu.fi> Steven Kelly <kelly@jyu.fi> writes:
>> I had a similar problem when running VisualWorks 1.0 in Windows
>> on a machine with Diamond SpeedStar PRO SVGA, in 256-color mode. Right
>> after the image loaded, any mouse movement caused GP fault.
>> After I switched to 16-color all was well. Funny, eh?
>
>Yes, we've noticed that VW is generally a little flakey with mouses 
>and 256 colours: we've never seen it crash (7 developers, 1 year
>of experience) because of this, but e.g. 256 colour Windows desktop
>bitmaps appear corrupted, viewing 256 colour images turns the grey
>bits of VW windows e.g. purple (they return to grey if you click
>on them), the mouse click responses are occasionally sluggish and
>sometimes dropped altogether.  I guess combinations of certain 256
>colour and 3-button mouse drivers can cause crashes.


That isn't crashing, it's just colour flashing. VisualWorks takes over
the whle 256 color palete for its own use. Other applications
(including the desktop) will look weird while VisualWorks is the
active application if they use other than the basic system colors.
There are other applications besides VisualWorks that take lots of
palette resources and cause this behavior. I think FrameMaker is one
of them. While mildly annoying, it does not indicate a bug.



-- 
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