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From: silver@eniac.seas.upenn.edu (Andy Silverman)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Leading Edge  Memory Expansion
Keywords: Neded the chip type
Message-ID: <7979@netnews.upenn.edu>
Date: 14 Feb 89 19:10:11 GMT
References: <450@oucsace.cs.OHIOU.EDU>
Sender: news@netnews.upenn.edu
Reply-To: silver@eniac.seas.upenn.edu.UUCP (Andy Silverman)
Organization: University of Pennsylvania
Lines: 18

In article <450@oucsace.cs.OHIOU.EDU> thollowe@oucsace.cs.OHIOU.EDU (Tom Hollowell) writes:
>I have a Leading Edge computer and it now has 512K.  What I need to know is
>what type of chips do I need to upgrade it to 640 K.  What ns speed can I
>use?  The manual doesn't tell, and I cannot get a hold of LE for an answer.
Leading Edge's Tech support has never been particularly wonderful.  What you
need (assuming you have their Model D XT clone), is 9 41256-type chips rated
at an access time of 150 ns.  Lower ns numbers will also work but they are
more expensive than what you need.  Note that this gives you a total of
758K of memory, but Leading Edge computers give you no way at all to access
the extra 128K.  Their board should have been designed to take 128K or 64K 
chips, as the 256K chips are more expensive yet less useful on that
particular motherboard...



Andy Silverman
Internet: silver@eniac.seas.upenn.edu
CompuServe: 72261,531