The 12-bit computer that I "translated" originally had *independent* 1 micro-second clocks in each of four racks. The processor derived a 3 micro-second clock from that, but also a second clock that was out of phase with the CPU master clock, used to sync. signals coming in from the other racks (which had 10 foot cables in between).
On 7/14/2015 7:04 PM, Eric Smith wrote: > On Tue, Jul 14, 2015 at 3:28 PM, tony duell <a...@p850ug1.demon.co.uk> wrote: >> If you mean 6 different clock sources (i.e. clocks delayed from each other, >> etc) then that >> is not typical of a 1970s minicomputer in my experience. > > IIRC, the KB11 processors used in the DEC 11/45 and 11/70 (and other > related systems) used five "clocks delayed from each other" (more > commonly known as clock phases). In my experience that was more common > in 1970s computers than a single-phase clock. >
