Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 alpha 4/15/85; site sdchema.sdchema.UUCP Path: utzoo!decvax!tektronix!hplabs!sdcrdcf!sdcsvax!sdcc3!sdchema!gino From: gino@sdchema.UUCP (Eugene G. Youngerman) Newsgroups: net.micro.pc Subject: Zenith PC-Clone Message-ID: <435@sdchema.sdchema.UUCP> Date: Sun, 18-Aug-85 18:03:59 EDT Article-I.D.: sdchema.435 Posted: Sun Aug 18 18:03:59 1985 Date-Received: Fri, 23-Aug-85 11:34:24 EDT Distribution: na Organization: Chemistry, UC San Diego Lines: 28 Xref: tektronix net.micro.pc:05378 We are about to purchase a Zenith 158 (IBM PC Clone) I would like to beef the memory to 640K, and to add a couple of additional serial ports. I have been told that the primary board in this computer has 3 banks for memory, one of which is filled with 256K. In order to make it 640K, I am supposed to fill the additional two banks with 256K chips, and then let DOS ognor the extra 128K. What I would like to know is, what is the difference between 150ns and 200ns chips. Also, what is the difference between low drain and high drain. I am confused. Also, since I want to add two serial ports, and since the computer does not come with a clock/calendar, which boards should I look into? I suppose I should put on one board with a serial and clock/calendar, and one board with just a serial. Suggestions? Thanks in advance. GINO -- gino@CHEM.UCSD.ARPA gino@CHEM.UCSD.UUCP sdcsvax!gino%chem.ucsd