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From: tim@j.cc.purdue.edu.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Zenith 158 Ram Upgrade
Message-ID: <2910@j.cc.purdue.edu>
Date: Tue, 13-Jan-87 11:12:09 EST
Article-I.D.: j.2910
Posted: Tue Jan 13 11:12:09 1987
Date-Received: Wed, 14-Jan-87 22:57:37 EST
References: <1294@ncr-sd.UUCP>
Reply-To: tim@j.cc.purdue.edu.UUCP (Timothy Lange)
Organization: PUCC, Purdue University
Lines: 12

The Z-158 comes with one bank of 256K chips installed.  There is room
for two more banks of chips.  Yes, this does give a total of 768K, but
the ram decoder only sees the first 640K.  Since the Z-158 can run at
8Mhz clock rate, 256K chips rated at 150ns or faster should be used.
The Z-159 has the same configuration, but has no wait states for memory
access.  I do not know what speed the memory chips should be.
-- 
Timothy Lange
Purdue University Computing Center
West Lafayette, IN
317-494-1787 extension 260
tim@j.cc.purdue.edu