Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!samsung!sol.ctr.columbia.edu!darrell!gaudi!zimmer.CSUFresno.EDU!billm
From: billm@CSUFresno.EDU (Bill Mills)
Newsgroups: comp.sys.atari.st.tech
Subject: RAM expansions
Message-ID: <1990Dec18.212338.1351@CSUFresno.EDU>
Date: 18 Dec 90 21:23:38 GMT
Reply-To: billm@zimmer.CSUFresno.EDU (Bill Mills)
Distribution: all
Organization: California State University, Fresno
Lines: 25
Keywords:EasieST Solderless RAM

I have gotten a hold of an ST second hand.  It is a 520, with 1 meg
upgrade.  The upgrade is an AERCO EasieST Solderless RAM board, and was
installed by a shop in San Lois Obispo, CA (That's what the previous
owner told me).  I have none of the docs for this board.  It has 32
sockets, with 18 pins each.  16 of these sockets are populated with 32K
150ns RAMs with 16 pins each.  The extra 4 pins that are open on the
sockets all halve solder traces connected to them, so it seems likely
that this board can handle larger (18 pin DIP) chips.

My questions: 

Does Aerco still exist, and if so, where can I get a hold of them?
Is any-thing more than plugging in 16 more 32k chips required to take my
machine to 1.5 meg?
Will using faster RAM speed up any operations that use the memory in the
card? 
Can I replace the 32k chips with 64, or even 256K chips (all of which
are very inexpensive these days) to go upwards toward 4 meg?
Any help will be greatly appreciated, please respond via e-mail.
-Bill Mills
-- 
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Disclaimer: These comments are my own, and I doubt that anyone else
would want to claim them anyhow.   Bill Mills
   Captain, BoBs Biz Boys paintball team