Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!killer!tness7!bellcore!faline!thumper!ulysses!mhuxo!mhuxt!aluxz!krm
From: krm@aluxz.UUCP (Kurt Marko)
Newsgroups: comp.sys.mac
Subject: Re: Simms
Message-ID: <929@aluxz.UUCP>
Date: 27 May 88 12:49:54 GMT
References: <5521@bloom-beacon.MIT.EDU>
Reply-To: krm@aluxz.UUCP (52153-marko, kurt r)
Distribution: na
Organization: AT&T Bell Laboratories, Allentown, PA
Lines: 26

In article <5521@bloom-beacon.MIT.EDU> twleung@athena.mit.edu (Theodore W. (Ted) Leung) writes:
>I have a 1 meg Mac II that I'm trying to get upgraded to 5 Meg.  All the
>places I've called have high profile SIMM's.  I know that high profile SIMM's
>can interfere with the use of the internal expansion slot in an SE, but it
>seems that there shouldn't be a problem in the Mac II.   Can anyone give a
>good reason for not using high profile SIMM's.  Apple's SIMM's are low
>profile, but they have to go into SE's as well.   The only thing I can come
>up with is that somone might make a 68030 accelerator that mounts in the
>socket for the 68020.   Also, a good source for SIMM's would be appreciated
>as well.

A potential problem with the so-called high-profile SIMMs is interference
with the modified disk-drive platforms used by CMS (and anyone else
using full-height internal hard drives).  To review...many (most?) of
the high capacity internal drives for the Mac II (150MB and up) are
full-height drives.  In order to install a full-height drive, you must
use a modified mounting platform which is recessed in the back (where
the hard drive sits) right over the SIMM slots.  I haven't checked the
dimensions, but I suspect that there isn't much clearance between the
drive tray and the top of the SIMMs.  High-profile SIMMs might make
such an installation impossible.  Now if you don't care about ever using
a full-height drive (I'm sure half-height 150's and 300's are on the way,
and maybe already here), this is a non-issue.

Kurt Marko
{att,ihnp4,...most_backbones...}!aluxz!krm