Hello.  I've started porting the txp(4) ethernet driver from OpenBSD
to NetBSD-1.6.1, but find that it's a little more complex than I first
anticipated.  I'm wondering if anyone else has done this work, or has some
tips on how to deal with the onboard checksum capabilities on the cards.  I
know we  have drivers if_elinkxl.c, which deal with onboard checksumming,
but I don't quite understand how the activation of this feature works in
the driver, and I'm not sure how to translate OpenBSD's handling of this
feature to NetBSD.

Any suggestions?
-Brian