Path: utzoo!yunexus!geac!syntron!jtsv16!uunet!lll-winken!lll-tis!ames!mailrus!bbn!oberon!skat.usc.edu!rfischer
From: rfischer@skat.usc.edu (Roger Fischer)
Newsgroups: comp.sys.mac
Subject: Re: what to do with 256K mem chips
Message-ID: <13207@oberon.USC.EDU>
Date: 2 Nov 88 05:29:27 GMT
Article-I.D.: oberon.13207
References: <860@ncar.ucar.edu> <10330067@eecs.nwu.edu> <323@uplog.se>
Sender: news@oberon.USC.EDU
Reply-To: rfischer@skat.usc.edu (Roger Fischer)
Organization: University of Southern California, Los Angeles, CA
Lines: 24

In article <323@uplog.se> anderss@uplog.UUCP (Anders Sjolund) writes:
>>> I now have 2 256K memory chips laying around after upgrading my Mac+ memory>>> with the 1Meg SIMMS.  Does anyone know how I can use these 256K chips to
>>> upgrade my memory from the current 2.5Meg to 3Meg?  Thanks.
>
>
>Since Apple is coming out with an upgraded (?) SE with a 40 Meg hard disk and
>2 Mbyte RAM, I suppose this is what those spare 256K SIMMS are good for...
>
The Macintosh Plus and the Mac SE have four slots for RAM simms.  When they
are put in, they must be installed in sets of two.  Therefore the available
configurations are 

	4 - 256K simms.                 -----> 1   meg
	2 - 256K and   2 - 1meg simms   -----> 2.5 megs
	4 - 1meg simms.                 -----> 4   megs

That is all that the mac logic board is built to accept.  I'm not sure,
but I think that MacSnap makes a ram expansion kit that allows two simms to
be plugged into each slot, the problem is that it comes with it's own simms
so you still would not be able to use your left over simms.

Roger-----
rfischer@skat.usc.edu
or
rfischer%skat.usc.edu@oberon.usc.edu