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From: jones@acsu.buffalo.edu (terry a jones)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Diamond Speedstar and HiColor modes
Keywords: Diamond Speedstar SVGA Hicolor Edsun
Message-ID: <80073@eerie.acsu.Buffalo.EDU>
Date: 15 Jun 91 02:45:30 GMT
References: <gurganus.676822952@stable.ecn.purdue.edu> <1214@applix.com>
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In article <1214@applix.com> scotte@applix.UUCP (Scott Evernden) writes:
>In article <gurganus.676822952@stable.ecn.purdue.edu> gurganus@stable.ecn.purdue.edu (James P Gurganus) writes:
[Some of which was deleted]
>I *thought* I understood that there were 2 versions of the new SpeedStar.
>One with the Sierra HiColor DAC, and the other with the Edsun CEG DAC.
>The HiColor gives you 32768 true colors; the Edsun gives you, like,
>700,000+ "fake" colors.  The HiColor is easier to program for; the
>Edsun does edge smoothing using some tricky embedded image codes.

	And I thought that the Edsun CEG DAC did all it's edge detection
and color diddling transparently.  As in, the DAC performed the enhancement
with the same driver or register level interface that a non CEG DAC would
have.  Can anyone comment on exactly how the Sierra and Edsun devices
function?  I'd be interested in getting more information on either of these
two, e-mail if you think it is not of general interest.

	A good what if question would be:  If the Edsun device really does
transparent color interpolation, are there any pathological cases where an
image would fail to be processed correctly (enhanced) by the device??

		Terry

Terry Jones   				{rutgers,uunet}!acsu.buffalo.edu!jones
SUNY at Buffalo ECE Dept.	  or: rutgers!ub!jones, jones@acsu.buffalo.edu