RE: more deterministic display

[Kevin Wolfskill <kevin.wolfskill@jadesolutions.com>]

What do you mean by "have it displayed at a time I have control over"?  Are
you trying to change the refresh rate of the monitor?  Users tend to get
upset if change things like this out from under them.  It can at minumum
cause flicker, or then inability to display, or in the worst case damage to
older monitors.  I'm also not sure if this was ever "standardized" in
various VGA chipsets.  What works on one video card may not work on others.
Have you looked into the latest version of VESA to see if it supports this?

Kevin Wolfskill
JADE Solutions
Office US   (303) 448-1019 ext. 23
Fax US      (303) 449-1548
Kevin.Wolfskill@jadesolutions.com
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-----Original Message-----
From: daniel sheltraw [mailto:l5gibson@hotmail.com]
Sent: Tuesday, June 20, 2000 9:55 AM
To: gameprogrammer@gameprogrammer.com
Subject: more deterministic display


Kev

Thanks for the reply. I think that Abrash's book is probably to out of date.

I believe I have the other book you refered to but it was of no help on this

matter. Do you have any other suggestions (articles, mailing lists, friendly

experts email address).

Thanks again. I know this is a run-of-the-mill question.

Daniel Sheltraw


>From: Kevin Shea <kevin.shea@d-cubed.co.uk>
>Reply-To: gameprogrammer@gameprogrammer.com
>To: gameprogrammer@gameprogrammer.com
>Subject: Re: deterministic display
>Date: Tue, 20 Jun 2000 10:11:29 +0100
>
>Don't know, but check out Michael Abrash's books - he describes VGA
>programming pretty thoroughly. There's also a book out there called
>"Programming EGA/VGA" or something like that.
>
>Kev
>
>daniel sheltraw wrote:
> >
> > Hello GPers
> >
> > I hope this is an appropriate place to post this question. I would like
> > to write an image to video memory and have it displayed at a time I have
> > control over rather than waiting for the next refresh of the screen. 
>Does
> > anyone know how to control the VGA to do this. I imagine it would be the
> > sequencer portion of the chipset that might need a tweak. Would some 
>sort of
> > reset then set of the sequencer work?
> >
> > Thanks,
> > Daniel
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