>   NW> See sys/dev/ic/if_ep_isa.c and elink.c for details.
> 
> I'm guessing they're present on NetBSD/i386 systems that
> have the source installed.  I don't have a NetBSD system
> built yet (although I ran it experimentally on a Toshiba
> laptop for a while).


The cvsweb interface is good for this. 
http://cvsweb.netbsd.org/bsdweb.cgi/syssrc/sys/dev/isa/


        - Nathan