On Sun, Feb 07, 1999 at 12:43:59AM -0600, kroh wrote:
> #modprobe arcnet (the com90xx driver will load it automatically,
> too)
> #modprobe com90xx io=0x2e0 irq=2 shmem=0xd0000
Do you need to provide all that stuff on the last line? It should be
automatic. If not, you probably have an IRQ or I/O or some other kind of
conflict. Try just:
modprobe com90xx
and then 'dmesg' to see what it says.
> arc0 Link encap:UNSPECHWaddrFE-00-00-00-00-00-00-F9-00-00-00-00-00-00-00
> -00
You have a REALLY old version of the net-tools package, or one compiled
without ARCnet support. Read the Changes file that came with your kernel.
Note: this looks scary, but doesn't actually hurt anything. The first byte
(FE) will be the ARCnet station address.
> How picky are old arcnet cards?
> I just want to do point-to-point - what do I need?
> I have an RG 58/U coax cable. Everywhere I go I see RG 63, I think -
> where do I find this (I believe that 63 is 93 ohms, and that the 58 is
> 50 ohms...)
> Do I still need T-connectors for point-to-point?
arcnet-hardware.txt is supposed to answer all of these questions, and as far
as I know, it does.
T connectors are only needed on BUS arcnet cards, which are MUCH less common
than Star cards.
> If so, I need terminators - if I need terminators, do THEY have to be
> 93-ohms as well, or can they be 50?
Just make something up. It usually works.
> Can I build my own terminators/t-connectors? If so, where can I get specs
> for making a coax terminator?
A T connector is basically a two-way splitter with no resistance. I
terminator is basically a resistor.
> Do ALL Arcnet cards support both bus AND star topology?
Nope. Read arcnet-hardware.txt and figure out exactly what kind you have.
The SMC PC-1xx and 2xx cards are well documented in there.
> Somewhere I saw that the SMC PC-1xx cards are only for star topology,
> and that the PC-2xx cards were only for bus topology. Seeing as how
> this is a bus topology, does this make it impossible?
No. arcnet-hardware.txt explains how.
> does anyone know where I can find arcnet equipment? Used, preferably.
> Cheap - even more preferably. Possibly in the Houston area? I have these
> 4 8-bit cards, and, in the future, I want to put them to use by making an
> arcnet cluster at home here, then bridging it to the rest of my lan.
Ask on the linux-arcnet or plain arcnet mailing lists, which are linked to
from my web page:
http://www.worldvisions.ca/~apenwarr/arcnet/
This is a recurring question. You might want to check the archives before
asking again.
> Michael Kroh
> Arcnet Idiot
> [EMAIL PROTECTED]
Have fun,
Avery
ARCnet driver author
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