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From: SAC.HQSAC-ACMI@E.ISI.EDU
Newsgroups: comp.sys.zenith.z100
Subject: Re: Problems with UCI Easy PC
Message-ID: <[E.ISI.EDU].1-Nov-87.16:17:59.SAC.HQSAC-ACMI>
Date: Sun, 1-Nov-87 17:17:00 EST
Article-I.D.: <[E.ISI.EDU].1-Nov-87.16:17:59.SAC.HQSAC-ACMI>
Posted: Sun Nov  1 17:17:00 1987
Date-Received: Thu, 5-Nov-87 21:17:44 EST
References: <16154@topaz.rutgers.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 32

I have been using the UCI Easy PC board, in a low profile Z-100, for a
little over a year now.  I started with Zenith's version 2.x and am
now using V 3.2 of MS-DOS.  I have had very few problems in PC mode.
Since I had bought the UCI board from Zenith, I had gotten one that
did not have the latest updates.  At first there were some problems, 
like the system freezing up with strange screen displays and such.
I also had to change a few ICs on the motherboard (one was U241 but
I don't remember what I changed it to, and another is U221 was changed to
a 7432)  According to UCI this was necessary to correct some timing 
problems.  I have never tried PC-DOS as I feel more comfortable with
Zenith's versions.  When I added an ST-225 harddisk I thought there
might be some new problems, but after 5 months nothing has gone wrong
(knock on wood).  The 100 side has 2K clusters and the PC side uses
4K clusters, other then that I can run most anything that can be used
on a PC (software only of course).

For those wondering why I went with UCI instead of ZPC:  I just 
don't care to patch software if I don't have to.  Also at the time
I bought my 100 the price for the UCI board set was only $300 (if 
purchased within 90 days).  I tried the Gemini board but was 
disappointed with the reduction in speed and the fact that the
board I had just would not work correctly at 8Mhz. (It destroyed
my working copy of DOS and my backup when I tried booting so I 
traded it in for the UCI).

I might also suggest you call David Chung an UCI and explain your
problem.  He has been very helpful when I have called.  Also if you
have 8 inch drives, or AT style drives connected to the 8 inch port,
UCI is working on an 8 inch driver.  It should be ready around 
Christmas.
-----
Marc