Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pasteur!ucbvax!TOPS20.RADC.AF.MIL!GUBBINS
From: GUBBINS@TOPS20.RADC.AF.MIL (Gern)
Newsgroups: comp.sys.zenith.z100
Subject: Re: Z-100 memory problems
Message-ID: <12496353811.9.GUBBINS@TOPS20.RADC.AF.MIL>
Date: 23 May 89 19:21:40 GMT
References: <808@unocss.UUCP>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 14

If I understand what you did:

Converted old MB 192K to 768K by Wiedamann method and pulled all S-100
RAM boards.

I would replace U153 with a 74S280 for a start.

If things don't get better, I now have 2 spare New Type motherboards
one 5MHz 64K RAM IC parts, one 8MHz 256K IC parts that I will let go
to the desparate for $35 and $75 respectively.  Neither contain any RAM.
They are pull outs from machines I bought for parts and gaurenteed to work.

Gern
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