Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!mcsun!ukc!newcastle.ac.uk!turing!q1cbw
From: D.C.Halliday@newcastle.ac.uk (D.C. Halliday)
Newsgroups: comp.sys.atari.st
Subject: Re: SIMMs for the STE
Keywords: SIMM, STE,
Message-ID: <1990Mar6.173546.6477@newcastle.ac.uk>
Date: 6 Mar 90 17:35:46 GMT
References: <2703@erix.ericsson.se>
Sender: news@newcastle.ac.uk
Organization: Computing Laboratory, U of Newcastle upon Tyne, UK NE17RU
Lines: 25

RE:  Arto Nummelin says...

>I've just tested 1M x 8 SIMMs from a Mac IIcx in my 520 STE.  IT WORKED!!!
>I took out the 256k x 8 SIMM (150 ns) and replaced them with two
>1M x 8 (80 ns) made by Samsung. Then I booted up and checked with a DA
>the amount of memory installed. 2048k it said!!!
>Then I tried to add my own SIMMs to the two free sockets. When
>I booted, it rebooted, rebooted ....... So it seems that you can't
>mix the 1M and 256k SIMMs.

As far as I can tell Atari have recoded the memory config table.
Testing the bits in the table on an STE give a 512K machine as having
512K in bank0 and 128K in bank 2! This means that it should be
possible to use say 3 1M simms and get 3 MEG of memory. (It may also
be possible to put in 4Mx8 simms if you can find any.) With a small
patch to stop the MMU causing an exception for addresses above 4Meg
the STe _might_ be expandable above the 4Meg limit of an STfm.

[ simm pinout deleted]the SIMM if anybody is interested:

Anyone know more about the possibity of more than 4Meg on an STe?

Dave H.

(D.C.Halliday@newcastle.ac.uk)