[TUHS] PDP-11, Unix, octal?

Lars Brinkhoff lars at nocrew.org
Tue Jan 17 06:25:16 AEST 2017


Warren Toomey wrote:
> I understand why other DEC architectures (e.g. PDP-7) were octal: 18b
> is a multiple of 3. But PDP-11 is 16b, multiple of 4.  After all, Unix
> had its own assembler, so was there a need/reason to use octal?

Octal is a natural fit for the instruction set encoding.


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