On Mar 26, 2020, at 9:40 PM, John H. Reinhardt
<johnhreinhardt at thereinhardts.org> wrote:
I have a MicroVAX 3100 Model 95. The
backside is nearly identical to yours. The OPA0: port is #3 (don't ask me why)
John - what are the 8 LEDs showing at the back of your 3100-95?
This web site has just about everything you want to know about DEC modular wiring and
their parts (plus a lot more, check out the RS-232 pages)).
<https://www.lammertbies.nl/comm/cable/dec-mmj#bc16>
--
John H. Reinhardt