Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!njin!princeton!udel!wuarchive!usc!apple!well!cassiel
From: cassiel@well.sf.ca.us (Paul Theodoropoulos)
Newsgroups: comp.sys.amiga
Subject: Re: Amiga 1000 Bootup/Guru Problem.
Message-ID: <17132@well.sf.ca.us>
Date: 9 Apr 90 00:29:33 GMT
References: <2014@awdprime.UUCP>
Reply-To: cassiel@well.UUCP (Paul Theodoropoulos)
Distribution: usa
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 29


In article <2014@awdprime.UUCP> rick@samurai.austin.ibm.com writes:
>My Amiga 1000 appears to be on its last leg.  I am constantly getting two
>GURU messages upon bootup.  These messages sometimes alternate, but the 
>message is rarely different than these two numbers.  This posting is a
>The GURUS I am getting are:
>
>00000003.00C01570 or
>00000004.00C01570               (This is the one I get 95% of the time)
>
>getting the constant GURUS listed above.  As a side note, I have the 512k 
>do-it-yourself memory upgrade that was in Byte a few years ago.
>+     Rick Sutton - Contractor - IBM AWD - Austin, Texas (512) 823-4722       +
>+          @cs.utexas.edu:ibmchs!auschs!samurai.austin.ibm.com!rick           +
>+     ..!uunet!cs.utexas.edu!ibmaus!auschs!samurai.austin.ibm.com!rick        +
With an unchanging memory address/location in all or your Guru messages I
would suspect 
a) a bad memory chip
b) a bad PAL on the daughterboard
It may be a heat problem, or possibly bad grounding. Check to ensure that
all of the memory chips in your DRAM hack are fully seated. Are they 
located in the C00000 range? Chances are that they are indeed. If you have
a marginal PAL, i'd suggest getting yourself a Rejuvenator board. It'll cost
some bucks ($500), but you will no longer have marginal parts on a marginal
board (the daughterboard). If that's out of your range, the PALs themselves
are pretty cheap, but you'll have to hire the services of a qualified 
electronic technician to check it out ($$$). Good luck.

Paul Theodoropoulos   cassiel@well.sf.ca.us    cassiel@well.UUCP