Date: Tue, 10 Jun 1997 10:14:45 +0200 From: Stefan Esser <se@FreeBSD.ORG> To: Terry Lambert <terry@lambert.org> Cc: stesin@gu.net, bob@luke.pmr.com, matt@3am-software.com, hackers@FreeBSD.ORG Subject: Re: Does SMC9332BDT work in 2.2.2R?? Message-ID: <19970610101445.26928@mi.uni-koeln.de> In-Reply-To: <199706091814.LAA29703@phaeton.artisoft.com>; from Terry Lambert on Mon, Jun 09, 1997 at 11:14:57AM -0700 References: <Pine.BSF.3.96.970609185104.15820Q-100000@trifork.gu.net> <199706091814.LAA29703@phaeton.artisoft.com>
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On Jun 9, Terry Lambert <terry@lambert.org> wrote: > Here is a duplicate of a response I've sent in the past. I suspect > that it is the problem in your case. > > > | This is probably the problem (the 5th slot, not the bus mastering). > | > | It has to do with PCI interrupt sharing. > | > | The PCI INT's are normally daisy-chained, and slots 4 and 5 (if 5 > | is present) are expected to share: > | > | slot 1 slot 2 slot 3 slot 4 slot 5 > | ,-. ,-. ,-. ,-. ,-. > | INT A --|A|-. ,------|B|-. ,------|C|-. ,------|D|----------|D| > | | | X | | X | | X | | | | > | INT B --| |-' \ ,----| |-' \ ,----| |-' \ ,----| |----------| | > | | | X | | X | | X | | | | > | INT C --| |---' \ ,--| |---' \ ,--| |---' \ ,--| |----------| | > | | | X | | X | | X | | | | > | INT D --| |-----' `--| |-----' `--| |-----' `--| |----------| | > | `-' `-' `-' `-' `-' > | > | By default, each PCI card will use the first interrupt connector, > | which will be A, B, C, or D, depending on the slot (note: old PCI > | hardware will *NOT* chain... it expects the boards to be jumper > | configurable, or all boards to share INT A). Why should that cause ANY problems for a bus-master card in slot 5 ??? Regards, STefan
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