> Was it possible in assembly to directly address each of those register (without the need for MOV-golfing ? Kind of. 12-bit address field in the instruction.

> Was it possible in assembly to directly address each of those register (without the need for MOV-golfing ? Kind of. 12-bit address field in the instruction. It was an accumulator machine; the CPU only had one main register (as we use the term today) and all operations were between that implicit register and the address specified in memory.