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From: schoff@cadtroy.UUCP (Martin Lee Schoffstall)
Newsgroups: net.micro,net.micro.68k
Subject: Re: 68020 MMU Questions
Message-ID: <140@cadtroy.UUCP>
Date: Mon, 26-Nov-84 15:55:46 EST
Article-I.D.: cadtroy.140
Posted: Mon Nov 26 15:55:46 1984
Date-Received: Wed, 28-Nov-84 02:36:18 EST
References: <4667@fortune.UUCP>
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Organization: CADMUS [Troy Office], Troy NY
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> 
>     Is anyone planning on using the Motorola PMMU chip? And if
> so, what about their emulation of this chip, the MMB board?

CADMUS is not going to use the Motorola PMMU chip.

> Anyone looked extensively at the MAC from Signetics? To the best 
> of my knowlege, it isn't any more available than the PMMU. Nor is
> their gate array synthesis any more available than Moto's MMC.
> 
>    Am I the only one experiencing frustration with the MMU question
> for 68020 support? I suppose I should just impliment our own MMU 
> again, and ignore the VLSI....
> 

I believe that for those interested in building virtual UNIX machines
the tradeoffs are availability, cost, and performance/functionality.
I believe this is what you find frustrating, finding the optimal point on
the graph of the function is highly company dependant.

marty

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