Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!caen!umich!sharkey!bnlux0!max!feat
From: feat@max.bnl.gov (john feat)
Newsgroups: comp.sys.atari.st.tech
Subject: AERCO board hacking
Keywords: AERCO, 4M, rework
Message-ID: <2139@bnlux0.bnl.gov>
Date: 19 Sep 90 22:41:06 GMT
Sender: news@bnlux0.bnl.gov
Reply-To: feat@max.UUCP (John Featherly)
Organization: Brookhaven National Lab, Upton NY
Lines: 14


	I think I've seen it asked a few times, but never seen anyone give
the details:
	What has to be done to the AERCO ram board to rework the 256K bank
to use 1M parts?  The sockets are the right size (yes I already have 2M worth
of chips in the other bank), but originally contained 256K parts so I believe
some trace cutting/jumpering is needed.

	Also if I do get that bank active, should I worry about removing
power from the .5M bank on the (520)ST main board to alleviate the drain on
the power supply as much as possible.  If so, do I have to clip the Vcc leads
of all the chips or is there a more elegant way?

	Thanks.