oldben wrote:
The CMOS version of the PDP 8 had a stack. IF I was redesigning the 8 , I would have 002X as auto decrement resisters that map to 001x
and Jump to subroutine pushes the PC using 17 as the stack.
Ah, didn't know that, interesting. Come to think of it, the PDP-8 had quite a long lifespan if you count the microprocessor versions and considering the (for the 1970s) limited architecture.