Okay, here I go. I have a PDP-11/83. It boots a very limited version of RSX-11M. (Sysgen is gone, no multi users, etc.) That's boring. I also have a RSTS/E distrib tape. 9-track tape. I don't have a Q-bus magtape controller. But, I do have an MT: emulating controller and drive attached to the PDP-11/34A. It works. I have read and written to the tape. Reading is fine, writing is iffy due to a braindamaged bootdisk (Not the new RT-11 set -an old one with MT.SYS on it) that Caterpillar made. The important part comes here. I have a thing called a DW-11B (I think). Anyway, it's a Unibus to Q-bus converter. One end goes in the Unibus box, and the other goes in the Q-bus box. Putting the Q-bus end in the 83, and the Unibus end in the 34, I'd be able to talk to the MT: controller, right? (I'd have to remove the 34A CPU, so it doesn't screw with the bus, right?) Does this sound OK, or am I missing something? -------