Path: utzoo!mnetor!uunet!husc6!mit-eddie!ll-xn!ames!sdcsvax!nosc!humu!uhccux!cm450s02
From: cm450s02@uhccux.UUCP (Jeff T. Segawa)
Newsgroups: comp.sys.mac
Subject: Re: Mac questions
Message-ID: <1406@uhccux.UUCP>
Date: 6 Jan 88 19:17:53 GMT
References: <1953@rti.UUCP>
Reply-To: cm450s02@uhccux.UUCP (Jeff T. Segawa)
Organization: U. of Hawaii, Manoa (Honolulu)
Lines: 19

In article <1953@rti.UUCP> rcb@rti.UUCP (Randy Buckland) writes:
>
>	1. Where is the socket for it on the motherboard?
The PMMU chip is located near the 68020 microprocessor.
>	2. I understand that it does not come on a standard MAC II. Is there
>		something that occupies the slot it should
 be in?
Yes, there is a custom chip in the PMMU socket that is supposed to be a 
simple memory management unit. It comes standard on all II's.
>	3. I have a MAC II with no empty sockets and a strange history. Is
>		there a way I can tell if I have it installed? What does
>		it look like? What are the numbers on it?
I don't have the PMMU chip, but it ought to look very similar to the
MC68820 chip it sits near--that is, it is a black ceramic square
measuring about 3cm * 3cm. It may or may not have a gold colored metal
plate on the top. The markings should probably say something like:
"Motorola MC68851RC16".

>