Blinkenlights, 't is the season!
You can recognize a PDP-11 operating system when the machine is idling.
One is running a vintage unix, the other a DEC OS. But which is which? Extra hacker creds for recognizing the exact unix version & specific DEC OS :-)
#PiDP11
Some good calls! Actually, it is 2.11 BSD unix at the top and RSX-11M Plus at the bottom. But I had forgotten... RSTS-E has a pattern like BSD, see below. So -1 point for me for forgetting that. RSTS-E is underappreciated in the PDP-11 retro world! Here it is...
@Oscar_CEDS
Lol, many years ago I had blinkenlights on my Z80 and 1802 machines, I knew exactly what the machine was doing just looking at those LEDβs. Miss those daysβ¦