Path: utzoo!utgpu!watmath!clyde!att!alberta!ubc-cs!van-bc!sl
From: sl@van-bc.UUCP (pri=-10 Stuart Lynne)
Newsgroups: comp.unix.xenix
Subject: Re: Adding an XT-Controller Card to a XENIX System.
Keywords: The manual says use a single controller card.
Message-ID: <2069@van-bc.UUCP>
Date: 27 Dec 88 08:46:48 GMT
References: <26252@teknowledge-vaxc.ARPA>
Reply-To: sl@van-bc.UUCP (pri=-10 Stuart Lynne)
Distribution: na
Organization: Wimsey Associates, Vancouver, BC.
Lines: 29

In article <26252@teknowledge-vaxc.ARPA> 0rrodrig@teknowledge-vaxc.ARPA (Russ Rodriguez) writes:
>Hello:
>
>	I'm wondering if anyone out there has added a second hard disk
>to their SCO XENIX 2.2.1 system where the second hard disk is on an
>IBM PC-XT-type controller card.  I'm using such a setup now, where the
>second hard disk is a PLUS-DEVELOPMENT-SYSTEM Hardcard-20.  The mkdev hd
>command just hangs after I answer the prompt.  Any pointers would be
>helpful. The manual says that xenix wants to have a single controller
>card, but perhaps there are exceptions?

Dave Dillabough (dave@dilltk.uucp) has two AT disk controllers running under
SCO 2.3 for the 386.

I leave posting the recipe to Dave but basically you have to address the
second card to the secondary winchester address and move the interrupt to
#15. This is the hard part because althought most of the controllers seem to
allow for readdressing, they don't allow the interrupt to be moved, so a
minor hardware mod is involved.

Anyhow the last I heard he did indeed have four hard disks up and running.

The XT probably has a similiar problem with interrupts. But you should also
check with SCO to see if they support two XT controllers (they do support
two AT controllers).


-- 
Stuart.Lynne@wimsey.bc.ca {ubc-cs,uunet}!van-bc!sl     Vancouver,BC,604-937-7532