RL02 version of UNIX6?

[william degnan]

All this talk about compatibility...was there ever UNIX made for the PDP
11/40 and RL02, or was it only run on RK05?  Wouldn't all of the C and wake
calls, etc issues have been solved then?  Why is this an issue now?  I am
largely ignorant to the details but from 20000 feet it would seem like this
would have been taken care of long ago.  No need for pre-processing code,
etc.  Please educate me if I am wrong, just curious.

Bill Degnan