*BSD News Article 60997


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From: se@ZPR.Uni-Koeln.DE (Stefan Esser)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Two 946Cs sharing IRQ 11 revisited
Date: 1 Feb 1996 19:41:19 GMT
Organization: Institute for Mathematics, University of Cologne, Germany
Lines: 29
Sender: se@Sysiphos (Stefan Esser)
Message-ID: <4er50v$l9g@news.rrz.uni-koeln.de>
References: <DLzF99.Fr6@wlbr.iipo.gtegsc.com> <4em14a$bji@news.rrz.uni-koeln.de> <slrn4gu1gn.egn.hwr@snert.pilhuhn.de>
NNTP-Posting-Host: sysiphos.mi.uni-koeln.de

In article <slrn4gu1gn.egn.hwr@snert.pilhuhn.de>, hwr@pilhuhn.de (Heiko W.Rupp) writes:
|> In article <4em14a$bji@news.rrz.uni-koeln.de>, Stefan Esser wrote:
|> >|> 	The Buslogic 946C is apparently not being detected as a PCI
|> >This doesn't mean that the PCI version won't work,
|> >it is just taken for an ISA card ...
|> 
|> What concequences does this have for the end user? Besides that one
|> can't use two bts in one box?

The PCI BusLogic card must be configured
as if it was an ISA card. I.e. the corerct
IRQ has to be assigned to the card's slot
in the PCI BIOS setup, and the card must 
have been mapped to the default address
by its own BIOS init code ...

The new code uses the PCI configuration
space registers to find the IRQ and port 
map actually used by the card. This makes
it possible to support any number of cards,
and since PCI interrupts are level triggered,
they can be shared.

Regards, STefan
-- 
 Stefan Esser, Zentrum fuer Paralleles Rechnen		Tel:	+49 221 4706021
 Universitaet zu Koeln, Weyertal 80, 50931 Koeln	FAX:	+49 221 4705160
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 http://www.zpr.uni-koeln.de/~se			  <se@ZPR.Uni-Koeln.DE>