520 memory upgrade symptom

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Article #26668

#26668

From: Lynn B. Dobbs
Date: Wed, 06 May 1987 14:17

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I recently added another set of 256K ram chips to my 520 for a total 
of 1Meg.  Using an available ram PD program, the machine reports the 
correct amount of memory and all my programs work including all the 
PD ramdisks.

However, the poor thing runs through the boot up cycle three or four times
before finally coming on line.  Has anyone else experienced this?

Also, the 5V power supply is 5.15 at the connector, 5.05 past the input
filter, 5V at the mmu, and 4.5V at the ram chips.  That is a lot of 
I squared R loss for the foil runs.  Is this normal?  I was considering 
running a jumper from the power supply input filter to the ram banks.  

Any info would be appreciated.  I don't really mind the extra boot sequences
(unless my machine is fixing to die :-)), but my wife is irritated! :-)
-- 
 dobbs@marlin.nosc.mil         "An adventure is the result of bad
--Lynn                         planning." Admiral Richard E. Byrd

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!lll-lcc!styx!ames!ucbcad!ucbvax!sdcsvax!nosc!marlin!dobbs
From: dobbs@marlin.UUCP (Lynn B. Dobbs)
Newsgroups: comp.sys.atari.st
Subject: 520 memory upgrade symptom
Message-ID: <971@marlin.UUCP>
Date: Wed, 6-May-87 10:17:48 EDT
Article-I.D.: marlin.971
Posted: Wed May  6 10:17:48 1987
Date-Received: Sat, 9-May-87 01:00:28 EDT
Reply-To: dobbs@marlin.nosc.mil.UUCP (Lynn B. Dobbs)
Organization: Naval Ocean Systems Center, San Diego
Lines: 19