Ok, that sounds interesting. But could it not be an
interface which acts
like a sort of device itself without the capability to control another
device like a disk or tape?
I think CX11 was used when you wanted to hang a PDP-11 off a mainframe
channel, rather than have a PDP-11 control anything IBMy.
Somewhere around here I have a similar device that hangs a PDP-11 off
a CDC Cyber channel. The PDP-11 (a /24, I think) was basically used as
a plotter controller.
--
Will