Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!rutgers!netnews.upenn.edu!cps3xx!usenet
From: usenet@cps3xx.UUCP (Usenet file owner)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Upgrading 500 to 1 Mb
Summary: Only change -1- jumper
Keywords: 500 Rev 6A 1 Meg on board upgrade
Message-ID: <6986@cps3xx.UUCP>
Date: 18 Mar 90 22:58:45 GMT
References: <3148@draken.nada.kth.se>
Reply-To: conklin@frith.UUCP (Terry Conklin)
Organization: Engineering, Michigan State University, E. Lansing
Lines: 51

If you are upgradind or thinking of upgrading the new Amiga 500 Revision
6A motherboard (with the spaces on the board for 1 Meg) these things you
should know:

* 1 - You CANT use sockets

   There is no room below the Amiga 500 keyboard - I know - I put in
sockets before realizing it. Swell. IT MUST BE A SOLDERED RIGHT ON THE
BOARD. (Bad form for home hackers. Be careful!)

* 2 - Only change jumper 7A

   Jumper 7 consist on not one, but TWO jumpers. You DONT change jumper
7, you change Jumper 7A (by the memory expansion connector.) Dont touch
7B.

* 3 - Be REAL bloody careful

    These microtrace motherboards are delicate as hell. I had traces
cook off, and I am a relatively experienced solder-slinger. (They got
cooked in the 4 hour process of trying jumper combinations.) Do the 
job once:

	Solder in the 4 memory chips. Use little solder. Never "glob."
	Cut jumper 7A. Make sure it's cut.
	Cut a small piece of wire and put it on the OTHER side of 7A.
		Don't just solder-bridge it! (Bad form again.)

-----------

I was VERY suprised to find that no one at Commodore answered my message
for help or how-to. Thanks guys - that makes me feel _real_ good about
reccomending Amigas to my 2000 users who trust MY word.

I WILL write up an official 'how-to' on these memory upgrades. I have
not because A.) I couldn't check whether the meg I installed is chip-ram
or half-and-half (512K chip, 512K fast.) and B.) I have not tested this
upgrade with existing Amiga 500 shuttle bay memory cards.

Until I have the complete story, no how-to. But this is enough info for
those who are cutting into machines now (especially that one cry for
help on the net.)

Anyone who wants to discuss it can contact me via email or my boards.

Terry Conklin				"He asked me questions
conklin@egr.msu.edu			 That kind of fool deserves a lie
uunet!frith!conklin			 I gave him answers
The Club (517) 372-3131			 The kind of answers Doctors like
The Club II (313) 334-8877		 Yes, I gave him a bunch of lies"
The Club III (714) ???-???? soon, it looks 	- King Diamond, Conspiracy