Article View: net.micro.atari16
Article #1482Re: 68000 Memory Managment
From: Gary Oberbrunner
Date: Fri, 12 Sep 1986 21:15
Date: Fri, 12 Sep 1986 21:15
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In article <6985@sun.uucp>, ludemann@sun.uucp (Jim Ludemann) writes:
> I hate to tell you folks, but Andy Bechtolsheim here at Sun has a patent
> (applied for and granted) on using the untranslated addresses as the
> RAS addresses and doing the MMU address translation before the column
> addresses are needed for CAS. Sooner or later, it's going to cost some
> competitors a WHOLE lot of money.
Yes, folks, I can believe this man. I have in my office right now a
patent (which has been successfully contested) on xoring cursors into
a frame buffer, so they can be easily erased. The patent also apparently
applies to rubber-band lines in xor mode.
I also have another one (can you believe this? it's true!) on the
transformation equations for perspective projection on a display screen,
and their implementation in a digital computer. This one has also been
fought, and although the original scope of the patent was much reduced
(the guy can now only soak you if you use HIS FORM of the equations), the
patent was upheld, not once but several times (I have a sheaf of court
documents all about this case - if you're interested in this sicko stuff
mail me and I'll provide references).
I don't have the numbers or the authors right here, but if you're interested
I can mail them to you.
It's a mad, mad, mad, mad, mad, MAD world.
- Gary Oberbrunner
...!{harvard,allegra}!masscomp!garyo
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site masscomp.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!masscomp!garyo From: garyo@masscomp.UUCP (Gary Oberbrunner) Newsgroups: net.micro.atari16,net.micro.amiga,net.micro.68k Subject: Re: 68000 Memory Managment Message-ID: <1109@masscomp.UUCP> Date: Fri, 12-Sep-86 17:15:51 EDT Article-I.D.: masscomp.1109 Posted: Fri Sep 12 17:15:51 1986 Date-Received: Sat, 13-Sep-86 06:11:45 EDT References: <508@elmgate.UUCP> <64@mit-prep.ARPA> <510@elmgate.UUCP> <6985@sun.uucp> <823@navajo.STANFORD.EDU> Reply-To: garyo@masscomp.UUCP (Gary Oberbrunner) Followup-To: net.micro.68k Organization: Masscomp - Westford, Ma Lines: 29 Keywords: patent, 68000, graphics Summary: Yes, sometimes the patent office gets wacko