> Is the DP8390 similar to the DS8390 or are they totally different?

They should be the same...

> I'd really like to get both the EtherPort and the Cabletron cards working.
> If anyone has any additional information about these cards or the DP8390,

National Semiconductor will be happy to send you info the on the 8390
(or any other National Semi. part like the SONIC (83932)).
They have offices around the world, but their 800 number is (800) 272-9959.

-allen

-- 
Allen Briggs - end killing - allen.briggs@bev.net ** MacBSD == NetBSD/mac68k **
   Where does all my time go?  <a href="http://www.netbsd.org/">Guess.</a>