Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!att!lzaz!hcj
From: hcj@lzaz.ATT.COM (HC Johnson)
Newsgroups: comp.sys.atari.st
Subject: adding memory to 1040ST
Message-ID: <698@lzaz.ATT.COM>
Date: 17 Jul 89 16:24:26 GMT
Organization: AT&T ISL Lincroft NJ USA
Lines: 28


>From Xerox.COM!"Paul_Millard.WGCERX"  Paul writes:

**************************************************************
2. my second atari is a 520ST with a 1 meg upgrade.  each chip has
piggybacked on it a second 25k dram.  All pins are soldered except for the
chip select. It works, and there are no connectors to work loose like my
ezram.
**************************************************************

Is The above correct, can i piggyback 256k bit drams to make my 1040 2mb?
Send me info (An idiots guide as i would'nt like to muck my ST up!!) on how
to do the upgrade.
						Cheers Paul.

P.s My 1040stfm is really an upgraded 520stfm.
				

Sorry, Paul, you cannot get to 2 meg that way.
The Atari only supports 2 banks of memory - which may be sized 256K or 1 MEG
(size = 2 meg is allowed, if you get 2 meg drams ??? ).
The 520ST upgrade I referred to is actuall adding a second bank.  Only most
of the pins are soldered to the first bank because the lines are common.

Howard C. Johnson
ATT Bell Labs
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hcj@lzaz.att.com