mowcius:
You also seem to be missing a few letters on the last keypad
(I know - hex code needs no Zs)
You only got 16 "data" keys. The rest were commands:
- M - examine/change memory
- E - Escape (abort)
- R - examine registers
- G - goto address and execute
- P - punch data (save program)
- L - load program
- N - trace one instruction
- V - set and remove breakpoint
The LEDs at the top showed address (4 hex digits) and contents (2 hex digits).
And there was a reset button on the edge of the board somewhere.