Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!uwm.edu!bionet!hayes.ims.alaska.edu!acad3.alaska.edu!fnjlh1
From: fnjlh1@acad3.alaska.edu (HARRIS JAY L)
Newsgroups: comp.sys.atari.st
Subject: memory problems
Keywords: mmu memory
Message-ID: <1991Mar30.204831.12866@ims.alaska.edu>
Date: 30 Mar 91 20:48:31 GMT
Sender: usenet@ims.alaska.edu (J Random USENET)
Reply-To: fnjlh1@acad3.alaska.edu
Distribution: usa
Organization: University of Alaska Fairbanks
Lines: 14
News-Software: VAX/VMS VNEWS 1.3-4
Nntp-Posting-Host: acad3.alaska.edu



     While chasing some problem that caused intermittent lockup w/ black screen,
after trying heat and cool spray, and getting random bomb numbers, I finally
removed the ZRAM, removed the MMU, treated the little pins w/ Cramolin (neat
stuff), and reinserted. I tried to be carefull and worked on a static mat, tried
to account for the little interrupt insulation that the ZRAM uses on one pin,
but still ended up with .5M instead of the normal unenhanced 1M. I found this
very discouraging. 
    Is there a specific pin that addresses each bank of memory, and where,
as exactly as possible might it be on the mmu? Or should I bark up another
tree entirely? I also fiddled with the video shifter in the ZRAM removal if thart
could be implicated.
    Thanks for any help. Stuck on my wife's 1M st... J Harris