HiColor and Windows

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2 total messages Started by Dave Anderer Wed, 02 Sep 1992 00:34

#2284

Author: Dave Anderer
Date: Wed, 02 Sep 1992 00:34

19 lines
1237 bytes

I recently added a HiColor DAC to my 1Mb Speedstar+.  Seems to work
fine, except in one case:

If I run Windows 3.1 in 800x600x32K mode, the card appears to drive
the display at about 31 KHz, and INTERLACED.  It should (and is
configured via VMODE) be driving it at around 48 KHz, NON-interlaced.

The pecular thing is that this happens only in this one mode.

800x600x256 is fine (NI), as is 1024x768x256, as is 640x480x32K.  It's
only the 800x600x32K that's flickering.

I've got what Diamond says are the latest drivers, dated 3/1/92.  They
seem stumped by these symptoms.  Do they sound familiar to anyone?
-- 
    Dave Anderer        danderer@brahms.udel.edu       (302) 831-8805
Instructional Technology Center, University of Delaware, Newark, De.  19716
		"Sinners can repent; stupid is forever."

Re: HiColor and Windows

#2283

Author: a.stranger
Date: Fri, 04 Sep 1992 23:34

20 lines
1562 bytes

In article <BtxDL7.Foo@news.udel.edu> danderer@chopin.udel.edu (Dave Anderer) writes:
>
>If I run Windows 3.1 in 800x600x32K mode, the card appears to drive
>the display at about 31 KHz, and INTERLACED.  It should (and is
>configured via VMODE) be driving it at around 48 KHz, NON-interlaced.
>
>800x600x256 is fine (NI), as is 1024x768x256, as is 640x480x32K.  It's
>only the 800x600x32K that's flickering.
>
				i called diamond tech support about this
. the problem is that the hicolor ramdac is not as fast as the regular
ramdac , and cannot support a 72Hz refresh rate in hicolor mode . if
your monitor does not support the slower ( 66Hz ? ) rate , or is not a
true multisync , it will use the 48 Hz interlaced mode instead . 

-- 
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       @       "Imagination keeps the shadows away  -  Xymox       @
       @~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~@
       @ a.stranger - CMS2839@ritvax.isc.rit.edu - PGP key on req. @

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