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From: cruff@ncar.ucar.edu (Craig Ruff)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Why no VM on a 68K? (was: Re: Why 68000?)
Keywords: MMU virtual memory Sys. 7.0 low-end
Message-ID: <6341@ncar.ucar.edu>
Date: 17 Feb 90 20:03:54 GMT
References: <1990Feb11.154304.19943@smsc.sony.com> <3919@hub.UUCP> <10223@hoptoad.uucp> <1990Feb15.155556.5319@uncecs.edu> <19472@dartvax.Dartmouth.EDU> <502@taniwha.UUCP>
Reply-To: cruff@handies.UCAR.EDU (Craig Ruff)
Organization: Scientific Computing Division/NCAR, Boulder CO
Lines: 13

>>And I may be going out on a limb saying this, but didn't the original
>>Sun's (the 1/XX series) use a 68000 to run Unix and virtual memory?

I'm surprised no one has gotten this correct yet.  The Sun-1 didn't have
virtual memory.  It swapped like a PDP-11.  It wasn't until the Sun-1.5
(which led to the Sun-2) that contained a 68010 that demand-paged virtual
memory was used.  I remember the Sun-1.5 had a version of BSD4.1 running on it.
This quickly gave way to the Sun-2 and BSD4.2.  That was before the days
of SunOS.
-- 
Craig Ruff      	NCAR			cruff@ncar.ucar.edu
(303) 497-1211  	P.O. Box 3000
			Boulder, CO  80307