From mboxrd@z Thu Jan  1 00:00:00 1970
From: jmk@plan9.bell-labs.com
To: 9fans@cse.psu.edu
Subject: Re: [9fans] file server install
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Date: Wed, 19 Dec 2001 22:08:33 -0500
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On Wed Dec 19 19:53:16 EST 2001, geoff@collyer.net wrote:
> What I noticed first was this:
>
> 	scsi#0: ncr53c8xx: port 0xe1906000 irq 11
>
> I believe port numbers are limited to 16 bits even for PCI devices,
> and given that your ether is at 0x6100, that 0xe1906000 should
> probably be 0x6000.  Perhaps your BIOS's PCI P'n'P code is broken?
> I've seen breakage in assigning IRQs before.
>
> The 0Mbps thing is also worrying; have you tried plugging your
> machines into a switch (they're pretty cheap now)?
>

The 53C8xx driver uses memory-mapped accesses so the apparently
large port address is OK.

A clue to the answer is, as Geoff points out,given by the 0Mbps 'thing'.
Here's a post from last year:

 From cse.psu.edu!owner-9fans Thu Jun 15 17:29:58 EDT 2000
Received: from plan9.cs.bell-labs.com ([135.104.9.2]) by plan9; Thu Jun 15 17:29:58 EDT 2000
Date: Thu, 15 Jun 2000 17:08:38 -0400 (EDT)
From: Sam Hopkins <sah@borf.com>
Subject: [9fans] fs configuration with the ether i82557

Heya,

If you're planning on setting up a fileserver with the i82557 nic, you'll
need to edit the code in your /sys/src/fs/<kernel>/ether82557.c file.
Currently it only checks and sets for the 100 mbps setup, and otherwise
leaves it 0.  This unfortunately makes the fileserver's network capabilities
nonexistent.

Around line 1043 you'll see the conditional:
  if(bmcr & 0x2000)
    ether->mbps = 100;
Add:
  else
    ether->mbps = 10;

and you'll be set.

sam