On 29/10/17, Noel Chiappa via cctalk wrote: > Another fun KA10 fact: it used 'hardware subroutines' - i.e. a clock pulse > would get to a certain point, and get conditionally diverted through some > other circuitry, later to come back and continue where it left off. Whee!
When I was taking a look at the CDC 1604 lately (btw, sadly two documents are missing on bitsavers) I saw pretty much the same thing. Something would set a flip-flop, go through the memory sequence, and continue from the point it left off. This reminded me of the PDP-6 immediately (which I'm very familiar with because of a logic-level emulator and verilog implementation I've written [1]). The indexing and indirection mechanism was also very similar. I suspect Gordon Bell was inspired by this machine a bit. I think I'll mail him about the 6 again... aap [1] https://github.com/aap/pdp6
