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From: reese@kim.Berkeley.EDU (Reese E. Faucette)
Newsgroups: net.micro.68k,net.arch
Subject: Re: 68000 Memory Managment
Message-ID: <15665@ucbvax.BERKELEY.EDU>
Date: Sat, 13-Sep-86 03:28:15 EDT
Article-I.D.: ucbvax.15665
Posted: Sat Sep 13 03:28:15 1986
Date-Received: Sat, 13-Sep-86 07:43:26 EDT
References: <508@elmgate.UUCP> <64@mit-prep.ARPA>
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: reese@kim.Berkeley.EDU.UUCP (Reese E. Faucette)
Organization: University of California, Berkeley
Lines: 18
Summary: andy bechtolsheim come up with this before 1981 ?
Xref: mnetor net.micro.68k:1217 net.arch:3025

>>>> 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.
>>>
>>>How the hell can the patent office grant patents like this? [...]
>>>the idea is too obvious.  [...]
>>
>>If it's so obvious, why didn't anyone think of it before Andy did?
>Does anybody have proof of having or using this idea before Andy's
>patent?

well, when i was a sophomore at caltech in 1981, a guy taking the
microprocessor lab with me built a 68000 system with exactly this
memory management scheme. i am sure his project proposal is still on
file with the professor of that class...

-reese