14 Jul
2015
14 Jul
'15
6:06 p.m.
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 <ard at
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.