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From: cunniff@hpfcso.HP.COM (Ross Cunniff)
Newsgroups: comp.sys.amiga.hardware
Subject: Probs adding RAM to A3000
Message-ID: <10870001@hpfcso.HP.COM>
Date: 12 Jul 90 01:25:31 GMT
Organization: Hewlett-Packard, Fort Collins, CO, USA
Lines: 35

Well, I finally got my ZIPs for my A3000 (TI parts, 80ns) and I
installed them (I'm typing on my 3000 as I speak).  A few comments about
the process:

	1. It is quite a chore to get the drive/power supply chassis off
	   the motherboard, mostly because the stupid hard drive cable
	   has all of .0001" slack in it; my hand almost didn't fit
	   under the chassis to unplug it.  Also, it seems that you must
	   remove the backplane and the little expansion card hole cover
	   thingies in order to lift the chassis out.

	2. Make careful note of which way the cables are supposed to go,
	   since the hard drive and floppy connectors are *NOT* keyed.

	3. Be *VERY* careful about which sockets you plug the ZIPs into;
	   the sockets are *not* consecutive on the motherboard.  The
	   documentation is good, though, so just pay attention.

	4. Getting the chassis back on is harder than getting it off
	   (especially the SCSI cable...)

Now for the problem.  1.3 seems perfectly happy with the setup.  I've
done some rudimentary tests and the RAM seems to be in fine condition.
HOWEVER, when I try to boot 2.0, the system always gurus before 2.0 is
finished booting, both from the floppy and from the hard drive.  The
guru occurs just after the Kickstart has been read in.  It is always
8000 0003, task 07D03238.  I suspect that it is in Exec or Dos or
something.  My configuration is:  1MB chip ram, 1MB fast DIPs, 2MB fast
ZIPs.  The jumpers seem OK.  Does anybody have any clues about what
might be going wrong?  I really want to boot 2.0 again someday...

				Ross Cunniff
				Hewlett-Packard Colorado Language Lab
				...{ucbvax,hplabs}!hpfcla!cunniff
				cunniff@hpfcla.hp.com