Path: utzoo!utgpu!watmath!clyde!att!osu-cis!killer!texbell!merch!cpe!techsup!garyk
From: garyk@techsup.UUCP
Newsgroups: comp.sys.tandy
Subject: Re: Tandy 1000 RAM chips
Message-ID: <15400004@techsup>
Date: 5 Dec 88 19:27:00 GMT
References: <344@pte.UUCP>
Lines: 22
Nf-ID: #R:pte.UUCP:344:techsup:15400004:000:1115
Nf-From: techsup.UUCP!garyk    Dec  5 13:27:00 1988


/* Written  2:36 pm  Nov 29, 1988 by pte.UUCP!car in techsup:comp.sys.tandy */
/* ---------- "Tandy 1000 RAM chips" ---------- */
I want to upgrade the memory in a Tandy 1000 that has the memory expansion
plus card. What off-the-shelf chips can be used to do this? I  that
I need 64K x 4 dynamic RAM chips, 41464, 4464, 50464, or 81464's: am I right?
What speed should the chips be rated at? 100ns, 120ns, 150ns?
Christopher A. Rende                Multics,DTSS,Shortwave,Scanners,StarTrek
uunet!{umix,edsews}!rphroy!pte!car  TRS-80 Model I: Buy Sell Trade
Motorola VME1131 M68020 SVR2        Precise Technology & Electronics, Inc.
/* End of text from techsup:comp.sys.tandy */

No.
To start with, the IC sockets on the Memory Plus board (25-1011) are 16 pin, 
while the 50464 is an 18 pin device.  The board will handle 64Kx1 or 256Kx1
rams like the 4164, 6665, or the 50256, depending on how the jumper is set.
The older boards took 64Kx1 RAMs only.  No memory upgrade board made by
Tandy took 64Kx4s, however some computers did (TX, SL, TL).

			Gary Kueck
			{sys1:trsvax}!techsup!root
			(817) 390-2911