The Honeywell minicomputers were located in the room next door, behind the left door. My shop was behind the right door.
The level 6 minis (behind the sliding glass doors) had Multics OS, and had a 4 character hexadecimal memory display and keypad on the protruding ‘ledge’. When the Level 6 crashed, it would jump to a memory location and halt. The hex display would then display that location: DEAD.