Message-ID:	<3740A242.E408AD0B@unb.ca>
Date:	Mon, 17 May 1999 19:12:02 -0400
From:	Endlisnis <s257m AT unb DOT ca>
X-Mailer:	Mozilla 4.51 [en] (Win95; U)
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To:	Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
CC:	djgpp AT delorie DOT com
Subject:	Re: code for changing monitor refresh rate
References:	<199905171023 DOT MAA02459 AT acp3bf DOT physik DOT rwth-aachen DOT de>
X-Info:	BrunNet, Inc. 888-278-6638
Reply-To:	djgpp AT delorie DOT com

Hans-Bernhard Broeker wrote:

> >     I've been looking for this for a while as well.  I haven't found
> > anything.  If anyone knows how to set attributes of "Plug and Play" monitors,
> > that would probably do the trick.
>
> 1) It's almost certainly impossible to gain any influence on the data
> a monitor and a graphics card exchange on their connection from the
> *monitor* side: it has no other connection but throught the graphics cards,
> so how would you talk to it?
>
> 2) There cannot possibly be a general method to do this. The basic
> thing is that the graphic card hardware has to be set up differently,
> and this means if the card vendor doesn't support you, you're most
> likely stuck. At the very least, you'ld have to write your own 100%
> hardware-specific, and *very* low-level kind of code, here. Think in
> terms of timing-critical, probably 100% undocumented port writes, or
> worse.

    There is a "Plug and Play" standard for monitor refresh.  That's how Win9x can
adjust the refresh rate without a driver from the monitor manufacturer.  The
graphics card also needs to support Plug & Play monitors for it to work.  There is
a standard method for determining (through the graphics card) what refresh rates
are available and setting them.  Why else would there be "Plug & Play" monitors?

--
     (\/) Endlisnis (\/)
          s257m AT unb DOT ca
          Endlisnis AT HotMail DOT com
          ICQ: 32959047

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