Path: utzoo!utgpu!water!watmath!clyde!rutgers!labrea!jade!ucbvax!hplabs!nsc!csi!jwhitnel
From: jwhitnel@csi.UUCP (Jerry Whitnell)
Newsgroups: comp.sys.mac
Subject: Re: Mac questions
Message-ID: <1357@csib.csi.UUCP>
Date: 6 Jan 88 21:35:39 GMT
References: <1953@rti.UUCP>
Reply-To: jwhitnel@csib.UUCP (Jerry Whitnell)
Organization: Communications Solutions Inc., San Jose, Ca
Lines: 20

In article <1953@rti.UUCP> rcb@rti.UUCP (Randy Buckland) writes:
>I have questions about the PMMu for the MAC II.
>
>	1. Where is the socket for it on the motherboard?

I don't have my Mac II here, so I try this from memory.  There are three
large (1" by 1") ICs placed on the center of the board.  You may have to
remove the drive bracket to see them.  One is the 68020, the second is
the 68881 and the third is the 68581.  The chips all are numbered.  If
you do not have the 68581 (PMU), it is replaced with an Apple chip that
provides a standard mapping (details in Macintosh Hardware Reference Manual
available in Beta form from APDA).  In my machine, the 68020 and the '881
are black with a gold cover, the Apple chip is all black.

>					Randy Buckland (919)-541-7103

Jerry Whitnell				Lizzi Borden took an axe
Communication Solutions, Inc.		And plunged it deep into the VAX;
					Don't you envy people who
					Do all the things You want to do?