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From: chris@umcp-cs.UUCP (Chris Torek)
Newsgroups: net.unix-wizards
Subject: Re: 4.2bsd uba question (too many zero vectors)
Message-ID: <4352@umcp-cs.UUCP>
Date: Tue, 26-Mar-85 21:47:46 EST
Article-I.D.: umcp-cs.4352
Posted: Tue Mar 26 21:47:46 1985
Date-Received: Sun, 31-Mar-85 04:16:09 EST
References: <9499@brl-tgr.ARPA>
Organization: U of Maryland, Computer Science Dept., College Park, MD
Lines: 13

Aha, I get to expose my ignorance again.  Hopefully I won't flop as
badly as with the "T1 links" question...  (Still, aren't those 56Kbit
links just a single T1 channel?  So in a sense... oh, forget it.)

If I'm not mistaken, a "zero vector" occurs when a device asks for the
Unibus, then doesn't respond when it gets it.  The 3Com boards are
rumored to be very persnickety about Unibus access.  Probably it
doesn't like sharing the bus with that DH/DM.  You might try moving it
from slot to slot....
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 4251)
UUCP:	{seismo,allegra,brl-bmd}!umcp-cs!chris
CSNet:	chris@umcp-cs		ARPA:	chris@maryland