Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!ncar!boulder!sunybcs!jmpiazza
From: jmpiazza@sunybcs.uucp (Joseph M. Piazza)
Newsgroups: comp.sys.mac
Subject: Re: Problem making 2 Meg memory upgrade to SE (Summary)
Summary: Mission accomplished
Keywords: about that resistor ...
Message-ID: <4980@cs.Buffalo.EDU>
Date: 31 Mar 89 19:59:25 GMT
References: <4916@cs.Buffalo.EDU>
Sender: nobody@cs.Buffalo.EDU
Reply-To: jmpiazza@sunybcs.UUCP (Joseph M. Piazza)
Distribution: na
Organization: SUNY/Buffalo Computer Science
Lines: 56

In article <4916@cs.Buffalo.EDU> jmpiazza@cs.Buffalo.EDU (that's me!) writes:
>	I'm having a small crisis.  I believe I erroneously clipped resistor 35
>when performing a memory upgrade to 2.5 Meg.
>
>	...  Upon closer inspection of the board I noticed that there
>is a jumper where I don't remember seeing before.  Has Apple gone ahead
>and revised the board by using a jumper instead of clipping a resistor?
>(Without telling me?  :-)  If so, how should it be properly set for 2.5 Meg?

	(This is on an SE, by the way).   Here's the story
	as succintly written by Mark Johnson <mjohnson@Apple.com>:

[All newer model SEs have a jumper installed to change memory.  This change
[is documented in Macintosh Technical Note #176, latest revision February 1989.
[Repair or replace the resistor you cut, and check out this Note for your
[proper configuration.  For 2.5MB, you should remove the jumper altogether.

	and from Boy Thomas <tboyd@csm9a>:

[... Also, install the 1 meg simms in the TOP two sockets instead of
[the bottom two.

	For all the info Ric Anderson <ric@arizona.edu> directs us to:

[Get a copy of TN176.  It has the info for both jumpers and
["cut-the-resistor" SE's, as well as other systems.  I think
[it's found on sumex-aim.stanford.edu via

[	ftp> cd info-mac/tn
[	ftp> get tns-feb89-part1.hqx
[	ftp> get tns-feb89-part2.hqx
[	ftp> get tns-feb89-part3.hqx
[
[This group has the updated tn176 which is a folder with a MacWrite
[instruction document, and some MacDraw pictures of boards.

	Also, thanks to Howard Haruo Fukuda <hf07+@andrew.cmu.edu>:

[...  As far as the resistor is concerned, it's not too much of a big
[deal if you cut it close to the motherboard like you're supposed to.  Just a
[little resoldering.  If you didn't...

	Well, I guess I did 'cause our hardware guru fixed it up so well I
could hardly notice it.  The Mac is up and running with 2.5 Meg of memory.

Thanks all,

	joe piazza

---
In capitalism, man exploits man.
In communism, it's the other way around.

CS Dept. SUNY at Buffalo 14260
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