System consists of LSI 11/23 (M8186), MSV11 (M8059KF), DLV11-J (M8043), RQDX3AA (M7555), and BDV11. These are in what was a MicroVAX II box. Thanks to help on the forum I burned a set of 2716 EPROMs as KDF11-BJ ROMs. Using PUTR I created what I hoped would be a bootable RT-11 disk for the RX50...