Actually... IIRC the RJ11 was used on the VT2xx and 3xx series terminals. The MMJ was only on the RS232 port. I would check, but I gave away my last non VT180 DEC terminal. Bill Sent from pechter@gmail.com -----Original Message----- From: Dan Cross To: emanuel stiebler Cc: The Eunuchs Hysterical Society Sent: Tue, 17 Sep 2019 12:31 Subject: Re: [TUHS] PiDP-11 in action! On Tue, Sep 17, 2019 at 2:23 AM emanuel stiebler wrote: > On 2019-09-17 04:51, Adam Thornton wrote: > > https://share.icloud.com/photos/0MKJjk8pRBvkZAEzaobjfOyPQ > > > > I start v7 Unix and play "Hunt The Wumpus". > > > > (I finally got it put together this weekend, and fixed the last couple > > dodgy joints tonight). > > IBM keyboard on a vt520? > Huh; apparently the VT520 had (well, has...) a PS/2 compatible 6-pin mini-DIN connector: http://web.mit.edu/dosathena/doc/www/ek-vt520-rm.pdf I'm most familiar with the earlier VT models that use MMJ connectors for the keyboard (and RS-232). That's kinda nifty, though. - Dan C.