Mail Archives: djgpp/1997/04/24/14:06:11
At 11:42 AM 4/24/97 -0400, you wrote:
>
>However, it's pretty easy to find vertical retrace. This should wait
>for
>the vertical retrace:
>
>while (inportb(0x3DA) & 1);
>
> Tom Grandgent
> tgrand AT canvaslink DOT com
> Canvas Link, Inc.
>
Um, I hate to drag out this false lead on the thread, but my VGA specs show
that bit 1 of 0x3DA is horizontal retrace. Today I (think I) succeeded with
"& 8", for bit 3. But the funny thing is, in NT3.51 I measured 69 Hz in
full screen and 72.3 Hz in a window, *** regardless of whether I set Control
Panel -> Display to 60 Hz or 72 Hz (rebooting, of course) ***. Does anyone
understand this?? I realize that this is no longer about djgpp, so what is
the proper discussion forum for this kind of question?
Roger Noss
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