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Article #954Re: 3100 mix and match
From: Burkhard Neidecker-Lutz
Date: Wed, 29 Nov 1989 19:05
Date: Wed, 29 Nov 1989 19:05
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Brian V. Smith writes: >>> What were the reasons for not using the GPX processor in the DS3100? >>> To go to a dumb frame buffer driven by the CPU seems like a giant step >>> backward. One reason was that it was cheaper and faster to develop this way and the other (mayor) reason is that this actually is 2-4 times *faster* than using the GPX chip set. For monochrome the choice was clear, we weren't so sure about the color case at first. Turns out that with the sole exception of scrolling the dumb frame buffer with CPU is faster than the GPX hardware by large amounts. Take a look at a DECstation 3100 running UWS2.1 (or 2.2...). Burkhard Neidecker-Lutz
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!apple!sun-barr!decwrl!kaputt.dec.com!neideck From: neideck@kaputt.dec.com (Burkhard Neidecker-Lutz) Newsgroups: comp.sys.dec Subject: Re: 3100 mix and match Message-ID: <8911291905.AA19444@decwrl.dec.com> Date: 29 Nov 89 19:05:12 GMT Organization: Digital Equipment Corporation Lines: 16