Device drivers for Berkeley 4.2

[DMS%MIT-OZ at MIT-MC.ARPA]

From:  David Siegel <DMS%MIT-OZ at MIT-MC.ARPA>

I am trying to track down a DR11-C (Unibus parallel port card) and
DR11-W (Unibus DMA card) device drivers for Berkeley Unix 4.2 that we
could obtain. It seems that these are such common devices that drivers
must be available.  I'd like to avoid writing them from scratch if
possible! 

I would appreciate any help in tracking down this software.  If none
exits, any advice on where to get info on how to write them would also
help.

Thanks!

(p.s. Are these the appropriate mailing lists to be sending these
requests? Forgive me if they are not!)