Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site looking.UUCP
Path: utzoo!watmath!clyde!cbosgd!looking!jan
From: jan@looking.UUCP (Jan Gray)
Newsgroups: net.micro.atari16
Subject: Re: 1Meg Upgrade Warning
Message-ID: <498@looking.UUCP>
Date: Wed, 26-Feb-86 11:00:05 EST
Article-I.D.: looking.498
Posted: Wed Feb 26 11:00:05 1986
Date-Received: Fri, 28-Feb-86 07:55:04 EST
References: <3806@pur-ee.UUCP>
Reply-To: jan@looking.UUCP (Jan Gray)
Organization: Looking Glass Software Ltd. Waterloo, Ontario
Lines: 20

In article <3806@pur-ee.UUCP> beatyr@pur-ee.UUCP (Robert Beaty) writes:
>  This is just a subtle warning to all of those interested in upgrading
>their Atari 520ST's to 1Meg. I attempted to do so two weekends ago and
>the result was a non-functional 520ST and about 24 hrs. of wasted time.
>				. . .
> If possible, find out EXACTLY what combination
>of components worked for someone else ( any offers out there? ).

I upgraded my ST months ago and it worked first time.  I used NEC 41256-15
DRAMs (*exactly* the same part as my Atari installed DRAMs, but manufactured
five weeks later!)

I did not install resistors, and I'm not sure if I will.  I do not have
the ROM upgrade yet.  One poster to the net said installing ROMs fried
his resistor-less upgrade, but others said it worked fine without resistors.

If the damn resistors are so important, why didn't Atari install them
on the lower 512K bank?

Jan Gray	Looking Glass Software, Waterloo, Ont.	    (519) 884-7473