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Path: utzoo!watmath!clyde!burl!ulysses!ucbvax!decvax!cca!prism!matt
From: matt@prism.UUCP
Newsgroups: net.micro.pc
Subject: New color card: 256 colors on a PC!
Message-ID: <7700013@prism.UUCP>
Date: Wed, 18-Sep-85 11:34:00 EDT
Article-I.D.: prism.7700013
Posted: Wed Sep 18 11:34:00 1985
Date-Received: Sun, 22-Sep-85 23:59:45 EDT
Lines: 32
Nf-ID: #N:prism:7700013:000:1580
Nf-From: prism!matt    Sep 18 11:34:00 1985


Reproduced without permission from INFOWORLD (Sept. 18, 9815):

    A new graphics board from a division of AT&T lets standard IBM color
    displays produce images with as many as 256 colors simultaneously, 32
    times the existing limit.

    The $695 VDAD (visual display adapter/digital) graphics board ...overcomes
    the inherent limit in the current digital RGB monitor, which normally can
    display only eight colors in two intensities at a time.

    Engineers at the [AT&T Electronic Photography and Imaging] center added
    the Bell Labs techinique [for pulse width modulation] to their existing
    VDA board, thus creating a digital version with the same 32,768 color
    palatte and the capability to display a selection of 256 colors from that
    palatte on the [standard IBM PC color monitor] screen, with a resolution
    of 256 by 200 pixels.

    Although the VDAD board has low resolution, the capability to select any
    combination of 256 colors from a large palatte gives the resulting picture
    a realistic quality.


Hmmm... 256 out of 32K colors on a standard PC color display?  Sounds
interesting.  I wonder if they're working on a higher resolution version
that would run on the EGS (256 by 350 pixels, perhaps?)

-----------------------------------------------------------------------------
 Matt Landau            {cca, ihnp4, inmet, mit-eddie, wjh12}...
 Mirror Systems, Inc.                                   ...mirror!prism!matt
 Cambridge, MA		(617) 661-0777
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