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From: wiedeman@altair.acs.uci.edu (Lyle Wiedeman)
Newsgroups: comp.os.cpm
Subject: (none)
Message-ID: <283AB586.2143@orion.oac.uci.edu>
Date: 22 May 91 18:16:38 GMT
Reply-To: wiedeman@altair.acs.uci.edu (Lyle Wiedeman)
Organization: University of California, Irvine
Lines: 22
Nntp-Posting-Host: altair.acs.uci.edu

I have a Kaypro II'83 which after 8 years of loyal service, lost
the ability to boot.  (Drive A can't read the boot track of ANY
disk, old, new, or master.)  I tried the drive-head cleaning trick
with no apparent effect.

I thought to myself "Self, twiddle with the innards, and get the
machine to believe drive B is A and vers vicea."  So I opened
up the poor beast, and twiddled: the two drives are on a single
controller cable; it doesn't matter which connector goes on which
drive; there must be a jumper somewhere which tells the drives
(identical in every obvious respect) their identities.

Question 1: I'd figure it out myself, if I had ever managed to
secure a copy of Chilton's Kaypro Handbook.  Anyone know how to
get one?

Question 2: Barring that, does anyone know how the drives are keyed
to their identities?
-- 
	Lyle Wiedeman                 Distributed Computing Support
	wiedeman@uci.edu              Office of Academic Computing
	wiedeman@UCI.BITNET           Univ. Calif. Irvine