10Base2 on 3Com 3C590-C

I'm trying to get communication working between two identical  
computers running Ubuntu linux (kernel 2.6.12) across a 10Base2  
link.  Each computer has a 3Com 3C590-C card over which I am trying  
to communicate, and a 3Com 3C905C that is integrated into the  
motherboard.  I suspect that the 3c59x driver might not be working  
correctly, because when I enable the 590-C to try across 10Base2, the  
905C stops working (yeah, dislexics beware :).  Also, when I try to  
ping from one computer to the other, I can see arp requests for the  
address of the destination computer, but it never replies so the ping  
fails.

Using vortex-diag, I've confirmed that the card is using the 10Base2  
link.  The 10Base2 cable is 12 feet long, and is terminated properly  
with 50-ohm termination.

When I plug an RJ45 crossover cable into the RJ45 jack on the 590-C,  
everything works fine (there are replies to the ping).  This is why I  
suspect that the code for the 10Base2 link may be out of date or too  
up-to-date for the card.  I would appreciate any help that someone  
has to offer.

Thanks
Aaron

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