Newsgroups: comp.sys.mac.hardware
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!viusys!uxui!unislc!mrc
From: mrc@unislc.uucp (Mike Cederholm)
Subject: Re: New SE/30 problem
References: <676094904.5@blkcat.FidoNet> <1991Jun5.150350.21814@eng.umd.edu> <1991Jun5.173719.8604@milton.u.washington.edu>
Message-ID: <1991Jun7.223337.29298@unislc.uucp>
Organization: unisys
Date: Fri, 7 Jun 91 22:33:37 GMT

tlk@milton.u.washington.edu (Jeremy Norberg) writes:

>russotto@eng.umd.edu (Matthew T. Russotto) writes:
>BB
>>In article <676094904.5@blkcat.FidoNet> Bill.Whitacre@p916.f421.n109.z1.FidoNet.Org (Bill Whitacre) writes:
>>>I sure could use some help with a perplexing problem.
>>>
>>>These are SE/30's that've been upgraded to 5MB of RAM by Falcon (the sole GSA vendor for Apple h/ware!) and internal 40MB hard drives.
>>>
>>>Turning on the machines out of the box we got the question mark'd disk instead of booting from the internal HD.  After booting from a floppy and having it recognize the HD it would boot from it upon restart.  Then, in unpredictable places while running va
>>>rious s/ware the machine would hang with various errors from 'out of memory' to 'bus error' to plain old 'system error'.  Sometimes they won't recognize a floppy that's shoved in, sometimes they will.
>>>
>>>It's all very strange and quite disturbing.  I have never had a problem with getting a Mac out of the box and having it fire up just fine.

>>In the wild guess arena-- Is the RAM the proper speed rating for the SE/30
>>(I think 120ns is required, but it could be 100ns)
>>--
>>Matthew T. Russotto	russotto@eng.umd.edu	russotto@wam.umd.edu
>>     .sig under construction, like the rest of this campus.

>The SE/30 as well as everything above it require 100ns chips or better!!

>Only Plus/Classic can use 120ns SIMMS.
>-- 
>                "The Power to be Your Best"   -Apple Computers
>         ------------------------------------------------------------
>           Jeremy C. Norberg                   tlk@u.washington.edu


I hate to disagree but per the Inside Mac series Hardware documentation ( I
am at a loss for the title right now) it clearly states that 120ns or better
memory is required for the SE/30, not 100 ns simms.  I know of no Techical
note reversing this and the dealers I talked to said the didn't either.


Thanks,
unislc!mrc@sun.com

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