Hi, my question is how porting a driver from FreeBSD to
NetBSD?

I have a winmodem Lucent supported on FreeBSD by driver comms/ltmdm, but
NetBSD doesn't has support for them, so I am looking for docs, howtos,
mans, etc, to getting know-how on how to port from one platform to other one.

something information will be great. Thanks   :)

Regards,
--Jose Correa