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From: rde@eagle.ukc.ac.uk (R.D.Eager)
Newsgroups: comp.sys.ibm.pc
Subject: NEC V20/V30 queries
Message-ID: <2899@eagle.ukc.ac.uk>
Date: Fri, 1-May-87 08:23:07 EDT
Article-I.D.: eagle.2899
Posted: Fri May  1 08:23:07 1987
Date-Received: Sun, 3-May-87 04:00:55 EDT
Reply-To: rde@ukc.ac.uk (R.D.Eager)
Distribution: world
Organization: Computing Lab, University of Kent at Canterbury, UK.
Lines: 21


I have two PCs (one 4.77, one 8 MHz) both of which have NEC V20s fitted,
and  both of which work fine. However, a few days ago I had a discussion
with  someone  from  the  U.S. who  said  that   certain   batches   had
problems. To summarise:

The  batch letter (or something) is the last letter (and optional digit)
on the first line of printing on the chip. Possible letters are:

     K9 - 50% duty cycle - PROBLEMS
     L - 33% duty cycle but limited temp range
     M - 33% duty cycle, OK

Other letters, same as M. I understand that the  normal  duty  cycle  is
33%;  fine.  Both my V20s are K9s. What does this imply? Should I change
them? Any ideas anyone?
-- 
           Bob Eager
           rde@ukc.UUCP
           ...!mcvax!ukc!rde
           Phone: +44 227 66822 ext 7589