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From: mangoe@umcp-cs.UUCP (Charley Wingate)
Newsgroups: net.micro.cpm
Subject: Annoying intermittent Kaypro problem
Message-ID: <1453@umcp-cs.UUCP>
Date: Sat, 10-May-86 23:52:27 EDT
Article-I.D.: umcp-cs.1453
Posted: Sat May 10 23:52:27 1986
Date-Received: Mon, 12-May-86 23:30:52 EDT
Distribution: na
Organization: Computer Sci. Dept, U of Maryland, College Park, MD
Lines: 14

My Kaypro has just developed a really annoying problem: characters entered
from the keyboard are intermittently altered when they are transmitted
elsewhere.  I'm not sure whether they appear within the machine, or whether
the USR Password I'm using is generating them on the way out.  A preliminary
investigation shows that in almost every case the change consists of one bit
being erroneously '1'.  The error seems to be on the order of about 1 per
40-140 characters; it's hard to tell with any precision because some
characters are affected more than others, apparently depending upon the
number of 'vulnerable' bits.

Has anyone else seen a problem like this?  Any suggestions as to where to
attempt to fix it?

C. Wingate