Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!rutgers!princeton!allegra!ulysses!mhuxt!ihnp4!inuxc!pur-ee!j.cc.purdue.edu!tim 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