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From: tve@ethz.UUCP (Th. von Eicken)
Newsgroups: comp.arch
Subject: Anyone for memory management on the AM29000?
Message-ID: <67@bernina.UUCP>
Date: Tue, 21-Apr-87 07:59:28 EST
Article-I.D.: bernina.67
Posted: Tue Apr 21 07:59:28 1987
Date-Received: Thu, 23-Apr-87 04:50:39 EST
Reply-To: tve@ethz.UUCP (Th. von Eicken)
Distribution: world
Organization: ETH Zuerich, Switzerland
Lines: 18
Keywords: AM29000, memory management, TBL, flame

Disclaimer:
We have the advance information data sheet and not (yet) the user's
manual so maybe our information is out-dated...

When reading the data sheet I noticed that the TLB entries
don not have any "page used" flag nor any "page modified"
flag. Does that mean that the AM29000 memory managenent is even
more crippled than on a VAX (which doesn't have a "page used" flag???

On TLB misses, as far as I understand, a software trap is generated.
Are there any figures on typical interrupt routine times for handling
the misses? What is the performance penalty, compared to miss
handling in hardware?

	Thorsten von Eicken	tve@ethz.uucp
	ETH Zuerich		...!seismo!mcvax!cernvax!ethz!tve
	Switzerland
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