Hi,

   Your real problem will be finding a cable.   Your best bet is probably
   to order that from DECdirect.   :'(

Although I haven't touched BSD on pmax in ages I can at least help with
this. I have 8 BC29G-09s' sittin here that I would be happy to give to
anyone that needs one for a NetBSD machine for postage. (They have a
funky connector that is about the size of a 15pin D, but with 3 shielded
prongs on one end and 3 BNCs on the other. I think it's the right guy.)

If you need one, just send me email with your real mail address and whether
you are in a hurry. (If you are in a hurry, I can send it airmail, but the
cost is quite a bit higher.)

Keep at it, rick