[RISOLTO] Rilevazione scheda di rete 3c905B-TX fallita
Ho ricevuto piena spiegazione del mancato rilevamento della schede ethernet
da parte dell'AST Bravo 5166 (Pentium 200) da nientepopòdimenoché Donald
Becker, l'autore del driver 3c59x per Linux (e per un gran numero di altre
schede). Il problema consiste nell'architettura del connettore "riser" su cui
si trovano i due connettori PCI, che non coincide con l'architettura della
scheda madre. Problema hardware quindi, non risolvibile (vattelo a trovare il
connettore riser giusto).
Qualcuno ha un pentiumino da buttare via? :-)
Sandro
--
Bellum se ipsum alet.
La guerra nutre se stessa.
Livio, "Ab urbe condita", XXXIV,9
---------- Forwarded message ----------
From: Donald Becker <becker@scyld.com>
To: Alessandro Selli <gaglioffo@interfree.it>
Date: Thu, 29 Nov 2001 07:17:44 -0500 (EST)
Subject: Re: [vortex] AST Bravo cannot detect 3c905B-TX (must be a PCI
problem)
On Thu, 29 Nov 2001, Alessandro Selli wrote:
> I found no mention at all of PCI setup in the BIOS' setup screen. The only
> other PCI card I have is a graphics adaptor. The BIOS does not detect it
> either, but this test is inconclusive, I'm afraid, because in the BIOS setup
> there is no way to disable the built-in svga.
This test _is_ conclusive: you should see the VGA card on the PCI bus.
It doesn't matter that you have an on-board video adapter. Note that
the on-board video adapter has a higher PCI device number (8) so that a
plugged-in card will be detected as a the primary adapter.
> powered. The PCI slot is housed on a riser connector, a passive 2-PCI+3-ISA
> slot connector inserted in the only "riser connector" on the mother
> board.
This is the problem. Each PCI slot has its own configuration space
selection pin. Any PCI riser must plug into a unique slot, and the
riser design must match the motherboard.
Without proper configuration space selection, you can't access the PCI
devices to configure them.
> The only jumpers on the mother board affecting the riser connector select a
> connector with two or three PCI slots on. Mine is correctly set for a two
> slots PCI connector.
Donald Becker becker@scyld.com
Scyld Computing Corporation http://www.scyld.com
410 Severn Ave. Suite 210 Second Generation Beowulf Clusters
Annapolis MD 21403 410-990-9993
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