I have always admired PDP-11, but the closest I have come to the “manual” programming was with an IBM/370, when I managed to type a small program, in hexadecima

I have always admired PDP-11, but the closest I have come to the “manual” programming was with an IBM/370, when I managed to type a small program, in hexadecimal, on a data entry device that used a magnetic tape, booted the system from the tape, and proudly showed to my peers a silly dialog with the typewriter console. An unforgettable experience.