Interp:
PROC [h: Handle, dummy:
CARD32, proc: PutProc, callTimeoutMsec:
CARD32, cmd: CStrings.CString]
RETURNS [
INT] ~
TRUSTED
MACHINE
CODE { "XR←Interp" };
Interpret the command, return the result (which is probably uninteresting).
If proc is NIL, the output goes on the PCR system console, wherever that is ...
}.