Why no snow on EGA/VGA?

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#6578

From: scott
Date: Fri, 04 Jan 1991 00:09

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As many of us probably know, the IBM Color Graphics Adapter exhibits "snow" on
the screen when the CPU and the video refresh circuitry both access the video
memory at the same time. The MDA, EGA, VGA, etc. don't have this problem.

Why not? What's the specific difference which prevents snow on better display
cards? Please email replies - I wouldn't want to bore the net (any more than 
this question already has ;-)

Thanks!


-- 
Scott Coleman                                                      tmkk@uiuc.edu

"Unisys has demonstrated the power of two. That's their stock price today."
       - Scott McNealy on the history of mergers in the computer industry.

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From: scott@blueeyes.kines.uiuc.edu (scott)
Newsgroups: comp.sys.ibm.pc.misc,sci.electronics
Subject: Why no snow on EGA/VGA?
Message-ID: <1991Jan4.000902.1143@ux1.cso.uiuc.edu>
Date: 4 Jan 91 00:09:02 GMT
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