[TUHS] Date madness
norman at oclsc.org
Thu Dec 14 08:16:40 AEST 2017
ISTR that the vaxen did have such things. Or rather, I ran some BSD 780s
for several years and I don't remember having to set the date / time
every time I did a reboot. They sat in a data center, so I may have never
done a cold boot from power on. It was a LONG time ago now, so there's
undoubtedly lots that I just plain don't remember.
I believe all the VAXes had time-of-year clocks, though
the implementation and the method of access varied from
model to model. On `Big' VAXes, the clock was considered
part of the console front-end, and accessed through the
model-specific console scheme. MicroVAXes had no console
front-end; I believe the clock was accessed through
registers, but it was an off-the-shelf digital-watch
chip with some funny format (separate registers for
year, month, day, hour, minute, second).
So they all had proper battery-backed-up clocks, but of
many different types. It wasn't as simple as reading a
single counter out of a register, sensible as that might
If anyone's really interested I can dig up details for
the several models of Big and MicroVAX I dealt with; I
still have all the code lying around.
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