Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!elroy.jpl.nasa.gov!decwrl!waikato.ac.nz!comp.vuw.ac.nz!actrix!Roger.Sheppard
From: Roger.Sheppard@actrix.gen.nz (Roger Sheppard)
Newsgroups: comp.sys.atari.st
Subject: Re: Memory Upgrades
Message-ID: <1991Jun30.123933.19386@actrix.gen.nz>
Date: 30 Jun 91 12:39:33 GMT
References: <1991Jun29.222924.14936@netcom.COM>
Organization: Actrix Information Exchange, Wellington, New Zealand
Lines: 35
Comment-To: yonder@netcom.COM

In article <1991Jun29.222924.14936@netcom.COM> yonder@netcom.COM (Christopher Russell) writes:
> I'm planning on doing a memory upgrade on my ST.  I would like to go
> to 4Meg.  It appears I have two options with my 1040STf:
> 
> 1: buy one of the memory upgrade boards.
> 2: sell my STf and get and STe
> 
> In either case I would like to get SIMMs that would be compatible with
> the RAM needed for IBMs, in the event of an IBM-compat. purchase in
> the future.  I believe IBM-compats. require 9 bit vs. 8 bit of
> Atari/Mac.
> Questions:
> Q: What is the best memory upgrade -- easiest to install, MOST
> RELIABLE!, compatible, flexible, cheap and available?
> Q: Is there a memory upgrade hack like there is for the 520? I do
> not fear soldering guns...
> Q: Anybody want to comment on just getting an STe?  How much would
> this upgrade path cost?
> 	cost = (ste price) - (sale of stf) + (pain in neck factor)
> Q: Did I get the 9-bit (IBM) vs. 8-bit (Atari/Mac) deal correct? And
> can I use the 9-bit SIMMs in available memory upgrades or the STe?
> 
> ....thanks ahead of time for any info.....

> yonder@netcom.COM or clr40@amail.amdahl.com or chrisr@leland.stanford.edu

Well go get the Doc file 2_5ram.zoo at atari.archive, also there is
one on Genie.
These will help you with a home brew upgrade.
with a home brew you can use sipp/simms and 9 bits will all upgrades,
Note: you must diable the parity bit, connect the inputs to VCC.
-- 
***  Roger W. Sheppard        *    Roger.Sheppard@bbs.actrix.gen.nz  ***
***  85 Donovan Rd          *  *   At least I don't Flicker, not     ***
***  Kapiti New Zealand..    *     like a dying light globe. !       ***