Without fully understanding it (I just began looking into this yesterday), here is the PDP-11, MACRO-11 listing of a “Hello, World” program (not my code) I ran on RT-11 from the preceding post. At this point I just wanted to learn the steps from source creation to execution. And this was a successful assemble.
I thought it would be somewhat interesting to follow it and look at the op codes, with the PDP11 Programming card in hand.