AI memo 161A: ITS 1.5 Reference Manual, July 1969:
An .OPEN on device USR with a second file name of
"PDP10" may be made,
in all the modes allowed for regular procedures, to access the memory
of the PDP-10.
So at this time, the AI PDP-6 was still the primary CPU.
AI memo 238: ITS Status Report, April 1972:
Actually the Project MAC Dynamic Modelling Group uses
a non-paged
early offshoot of ITS on their PDP-10.
So it seems DM kept using the non-paged version of ITS, probably like
what their PDP-6 did.