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From: korn@cory.Berkeley.EDU.UUCP
Newsgroups: comp.sys.mac
Subject: SIMM RAM for the MacII
Message-ID: <20389@ucbvax.BERKELEY.EDU>
Date: Tue, 1-Sep-87 01:09:35 EDT
Article-I.D.: ucbvax.20389
Posted: Tue Sep  1 01:09:35 1987
Date-Received: Wed, 2-Sep-87 06:42:00 EDT
Sender: usenet@ucbvax.BERKELEY.EDU
Reply-To: korn@cory.Berkeley.EDU.UUCP (Peter "Arrgh" Korn)
Organization: What, me organized???
Lines: 24


A few weeks ago comp.sys.mac saw a discussion of SIMM RAM for the MacII,
with the consensus being that one *had* to use either 120 or 100 ns RAM
SIMMS (which all the new Mac+ and SEs had in 'em anyway).  Well, we 
just upgraded our Mac+ to 2 Meg via the DOVE 2H board, and I decided to
put the 256K SIMMs into my MacII.  Trouble was, these SIMMS were the 
older 150ns SIMMs.  But, lo and behold, THEY WORKED.  I haven't had a 
chance to benchmark 'em, but as far as I can tell, they're causing no
problems.

So, it seems that 150ns DRAMs are perfectly kosher for a MacII.  When
I get a chance, I'll run some timing benchmarks, and re-post those
findings.


Peter

P.S.  The Dove upgrade worked quite well, and I'm very happy with it.  To
      get only 2 Meg out of it (vs. 2.5 Meg), you have to solder a 150 ohm
      resistor onto the motherboard.  After doing that, it works fine.
--
Peter "Arrgh" Korn
korn@ucbvax.Berkeley.EDU
{decvax,dual,hplabs,sdcsvax,ulysses}!ucbvax!korn