Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!rutgers!iuvax!bobmon
From: bobmon@iuvax.cs.indiana.edu (RAMontante)
Newsgroups: comp.sys.zenith
Subject: Re: Memory Parity Error
Message-ID: <35127@iuvax.cs.indiana.edu>
Date: 7 Feb 90 01:27:20 GMT
References: <1071@darkstar.ucsc.edu>
Reply-To: bobmon@iuvax.cs.indiana.edu (RAMontante)
Organization: malkaryotic
Lines: 35

About getting "all" your 768K in a z-158
(and a possible memory board solution):

I added an expanded memory board to my z-158.  (As is often the case) the
board is capable of backfilling the main-memory space before starting the
EMS.  So I took the third bank of 256K chips off my memory board and added
them to the EMS board, then let it backfill from 512K up to 640K.  It added
the "unused" 128K to its total EMS.  So in effect the EMS board gave me
an eighth-Meg more memory than I bought for it...

As for the "rats' nest of wires" memory board problem, I discovered in
the course of playing around that I could take _all_ the chips off my
memory board and put them on the EMS board --- it successfully
backfilled the entire 640K.  I don't do this because it seems kind of
suspect to me, and my memory board is okay (actually, I seem to have a
chip failure in one of my EMS chips, but I can't diagnose that!  argh).
But it might get you out of a problem without having to spring for a
replacement mem. board.

And a final neat feature:  Chris Dunford/Cove Software distributes a free
program called EEMRAM that can map Enhanced expanded memory into the address
space between 640K and a CGA adaptor.  No hardware mods needed, and my
machine reports 736K of main memory.  I love it!

My board:
	RAMPARTNER 2-Meg EEMS/EMS board
	PC Technologies, Inc.
	Ann Arbor, MI  48108
	313/996-9690

What I got is LIM 3.2/EEMS compatible, they may be compatible with LIM
4.0 by now.  Or they might be out of business; I haven't been following
along to know.

bob,mon.