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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!merlin!mel.dit.csiro.au!munnari.oz.au!constellation!bubba.ucc.okstate.edu!newsfeed.ksu.ksu.edu!moe.ksu.ksu.edu!vixen.cso.uiuc.edu!howland.reston.ans.net!pipex!uunet!zib-berlin.de!rs1-hrz.uni-duisburg.de!rrz.uni-koeln.de!RRZ.Uni-Koeln.DE!RRZ.Uni-Koeln.DE!news From: se@fileserv1.MI.Uni-Koeln.DE (Stefan Esser) Newsgroups: comp.os.386bsd.development Subject: Re: Opti PCI bridge not supported Date: 13 Dec 1994 17:56:53 GMT Organization: Institute for Mathematics, University of Cologne, Germany Lines: 44 Distribution: world Message-ID: <3ckn95INN3mbe@rs1.rrz.Uni-Koeln.DE> References: <3bki7u$55u@bee.uspnet.usp.br> <3c4mro$1f7@bonnie.tcd-dresden.de> NNTP-Posting-Host: fileserv1.mi.uni-koeln.de In article <3c4mro$1f7@bonnie.tcd-dresden.de>, j@uriah.sax.de (J Wunsch) writes: |> Mario Donato Marino <mario@lsi.usp.br> wrote: |> |> >I have a motherboard PCI/VESA with Opti chipset. FreeBSD has detected |> >that I have a PCI MB with Opti Chipset, has scanned for the PCI controllers |> >but has reported that the MB has a PCI bridge that it doesn't support. |> > |> >If I use a AHA-2940 (or a PCI graphic card), will the set MB + AHA-2940 be |> >supported ? |> |> Certainly not. |> |> First, if the PCI probe reports that your PCI bridge is unsupported, |> any and all PCI cards will be unsupported, too: Hmm, sorry, but that's not quite right ! I guess I know (second:) best, what the PCI code is actually doing ... The problem seems to be, that the PCI scan code reports any unknown PCI chip as "unsupported", while in fact they often don't need any support ... The VLB<->PCI bridge chip ought to respond to standard addresses, and that's enough for the PCI probing routines to find any device behind the bridge. There currently isn't much support for PCI<->PCI bridge chips (well, the understatement of the week) since we did lack the hardware. The number of PCI buses to scan at boot time can be adjusted, but there are some PCI chip sets, that just don't decode the bus number and report the same devices over and over again on each bus id you try ... So, anybody who sees unexpected results from the PCI bus scan phase, please send me a report containing your system type (incl. PCI chip set / bridge chip) and the "dmesg" output ... -- Stefan Esser Internet: <se@ZPR.Uni-Koeln.DE> Zentrum fuer Paralleles Rechnen Tel: +49 221 4706010 Universitaet zu Koeln FAX: +49 221 4705160 Weyertal 80 50931 Koeln