Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!zephyr.ens.tek.com!vice!georgep
From: georgep@vice.ICO.TEK.COM (George Pell)
Newsgroups: comp.graphics
Subject: Re: 32768 colors with the TSENG ET 4000 and Sierra DAC ???
Message-ID: <7569@vice.ICO.TEK.COM>
Date: 7 Jun 91 18:04:13 GMT
References: <H7HR0NO@zelator.uucp> <1991Jun6.191849.5312@vax5.cit.cornell.edu>
Distribution: comp
Organization: Tektronix Inc., Beaverton, Or.
Lines: 16

In article <1991Jun6.191849.5312@vax5.cit.cornell.edu> n65j@vax5.cit.cornell.edu writes:
+The Compuserve software that takes advantage of this chip tends to rely on
+the extra BIOS support which Tseng labs defined and which STB implemented even
+before they started selling boards which included the chip.  Thus you may need
+a BIOS upgrade unless you are into programming the Tseng chip and Sierra chip
+at the register level.  Might be fun, for some.
+
+-- regards, Steve Pacenka, Cornell U.

Be aware that the STB Ergo-Powergraph board which uses the Tseng ET4000 chip
set has some MAJOR bios bugs, and is undergoing revision by STB.  BIOS 
versions 1.1 and 1.2 will not allow you to read access pixels with a y
value greater than 512.  Version 1.3 is about to be released after debug 
(I have a beta version). 

geo