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Path: utzoo!linus!philabs!cmcl2!seismo!umcp-cs!chris
From: chris@umcp-cs.UUCP (Chris Torek)
Newsgroups: net.unix-wizards
Subject: Re: Can't get uba1 to work w/750 under 4.2
Message-ID: <8137@umcp-cs.UUCP>
Date: Tue, 21-Aug-84 22:26:28 EDT
Article-I.D.: umcp-cs.8137
Posted: Tue Aug 21 22:26:28 1984
Date-Received: Thu, 23-Aug-84 03:54:44 EDT
References: <12640@sri-arpa.UUCP>
Organization: U of Maryland, Computer Science Dept., College Park, MD
Lines: 14

Does the 4.2 distribution have a preallocated UBA1 interrupt vector
area?  If not, that's the problem.  If you look at ubavar.c (and I
think locore.s) you'll find a ``UNIvec'' table.  This is used for UBA 0
interrupt vectors.  Unfortunately for Comet users, the scheme used to
allocate interrupt vectors for UBAs 1 on up doesn't work on 750s.  So
autoconf and locore.s and so forth need to use one allocated in ``low
core'' like UNIvec.

(I don't have any more specific information; this is what I remember
from a fix posted long ago for 4.1.)
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci (301) 454-7690
UUCP:	{seismo,allegra,brl-bmd}!umcp-cs!chris
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