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From: fnf@mcdsun.UUCP (Fred Fish)
Newsgroups: comp.sys.mac
Subject: Re: Virtual Memory with the Mac OS
Message-ID: <383@mcdsun.UUCP>
Date: Mon, 5-Oct-87 17:33:35 EDT
Article-I.D.: mcdsun.383
Posted: Mon Oct  5 17:33:35 1987
Date-Received: Sat, 10-Oct-87 19:22:38 EDT
References: <2653@okstate.UUCP> <2542@batcomputer.tn.cornell.edu> <2929@husc6.UUCP>
Reply-To: fnf@mcdsun.UUCP (Fred Fish)
Organization: Motorola Microcomputer Division
Lines: 18
Keywords: virtual memory 68851

In article <2929@husc6.UUCP> stew@endor.UUCP (Stew Rubenstein) writes:
>The wait states are already there.  Two of 'em.  The 851 doesn't add any more.
>As I understand it, it's a drop-in replacement for the fake MMU that's in
>there now.

On the back of a recent EE Times was an ad from Hamilton-Avnet for something
called an MC68020KIT, which included a 68851, 68020, and 68881 (all 16Mhz)
for $399.  I ordered one, snarfed out the 68851 (actually an XC68851) and
popped it into my Mac-II.  As far as I can tell, everything works exactly
as before.  So yes, it does look like it is a drop in replacement.
I've since resold the remainder of the kit to someone who could use
the 020 and 881, so my net cost for the PMMU was about $100.  Now if I
could just get A/UX...  :-(

-Fred
-- 
# Fred Fish    hao!noao!mcdsun!fnf    (602) 438-3614
# Motorola Computer Division, 2900 S. Diablo Way, Tempe, Az 85282  USA