[morzh]

We in Russia started using PDP-11 when you guys were almost dome with them and even VAXes were on their way out.
So I had my fun with them, repairing (yes, troubleshooting down to a component - no luxury of swapping and tossing boards; sometimes even tracing the microcode and replacing ROM) for which I had to write short assembly programs or even in codes directly right from the key switch panel.

012737
100
177560

Means "set the interrupt bit 6 in the Console Display's Keyboard Command Register".

013737
177562
177566

means "display on the console's screen what you've just typed on the keyboard".

Fun