Article View: comp.sys.atari.st
Article #2577Re: upgrading a 520 ST to 1 meg - how about 2 meg?
From: Gert Slavenburg
Date: Mon, 24 Jul 1989 18:58
Date: Mon, 24 Jul 1989 18:58
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Several postings have recently asked about the old upgrade of a 520ST to 1M by piggybacking 256k RAM chips. The initial upgrade description article was from me and posted on comp.sys.atari.st in August 1985. I have no copy of the original article anymore, but you can find a reproduction of it in BYTE : BYTE Feb 86, Vol 11, No 2, p. 372-376 (BIX Atari ST) The original upgrade worked for me, and still does. However, many sources have published improvements w.r.t. electrical signal quality. I believe it is a good idea to use thicker wires than I originally suggested. REMEMBER : ONLY DO THIS UPGRADE IF YOU HAVE HARDWARE EXPERIENCE AND HAVE ACCESS TO SOME HARDWARE DEBUG TOOLS IN CASE IT FAILS. Gert Slavenburg (..!pyramid!prls!gert) Disclaimer : Try this upgrade at your own risk. It will void your warranty and may affect your rights to repair or exchange.
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arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hplabs!pyramid!prls!gertReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!hplabs!pyramid!prls!gert From: gert@prls.UUCP (Gert Slavenburg) Newsgroups: comp.sys.atari.st Subject: Re: upgrading a 520 ST to 1 meg - how about 2 meg? Summary: where to find instructions Keywords: 1M upgrade piggyback Message-ID: <24135@prls.UUCP> Date: 24 Jul 89 18:58:28 GMT References: <706@lzaz.ATT.COM> Reply-To: gert@prls.UUCP (Gert Slavenburg) Organization: Philips Research Labs, Sunnyvale, California Lines: 17