Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!oliveb!apple!bloom-beacon!athena.mit.edu!farhi
From: farhi@athena.mit.edu (Bill Hoston)
Newsgroups: comp.sys.amiga
Subject: Re: UNIX vs. Amiga speeds
Message-ID: <10232@bloom-beacon.MIT.EDU>
Date: 31 Mar 89 20:41:24 GMT
References: <6411@cbmvax.UUCP> <3945@druwy.ATT.COM>
Sender: daemon@bloom-beacon.MIT.EDU
Reply-To: farhi@athena.mit.edu (Bill Hoston)
Organization: Massachusetts Institute of Technology
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Quoting Dan Moore in <3945@druwy.ATT.COM>:

>       Motorola sent out a tech report describing how to use two 68000s
>and a 68451 MMU.  The first 68K ran the user programs, instead of
>causing it to buss error the 68451 would wait state it and cause the
>second 68000 to take over.  The second 68000 would then fix the memory
>fault by swapping to/from disk and then allow the first 68000 to resume
>execution of the user code.

>        I wonder if anyone ever really built a system that worked that
>way.


If I remember correctly, a recent thread on comp.sys.m68k said the
first Sun's used such a method.  I don't know all the details (wish I
did). 




	Bill Hoston
	farhi@athena.mit.edu