Date   : Mon, 25 Jan 1988 14:36:00 PST
From   : Alan Bomberger <ACB.COR@OFFICE-1.ARPA>
Subject: Floppy powerdown

I started having this problem after I added "a few boards" to my aging 
NorthStar computer.  I believe that it relates to the order of power supply 
drop out.  I suspect that you need to insure that the 12 volts goes away before
the 5 volt (logic).  But of course it could be the other way around.  So why 
did I answer your query , you say, If I don't know?  Well, I am pretty sure 
that it is power supply related and you can experiment to find out which 
voltage must drop first to insure safety.  Peace