[boulderdash]

Hi srean - thanks for that recap. I just did some more digging on this and tried to understand the assembly versions of coroutines. They were very spartan. It was just: POP the next address from the stack into TEMP, PUSH the current PC, then set the PC to TEMP. Notice that there isn't any linking or parameter passing.

Overall, it has been fun reading on all the variants of this idea.

side note: in my first job, there were a few PDP-11s in the lab that I was responsible for. We never turned them on though.

Also, the PDP 10, which you mention above, was one of the most revered machines by hackers.