[Info-vax] AlphaServer DS10 470 MHz?

[VAXman- at SendSpamHere.ORG]

In article <jfh83v$35m$1 at reader1.panix.com>, JohnF <john at please.see.sig.for.email.com> writes:
>In comp.os.vms VAXman- wrote:
>> I suspect that it's far easier to accurately measure the clock speed than
>> it is to try to measure the zero-crossings accurately for cycle-time.
>
>Just curious -- I was wondering about that: isn't the cpu driven by
>an (onchip or onboard?) oscillator of some sort? If that's the same
>oscillator that drives the clock, then it's always going to measure
>the "correct number" (i.e., however many cycles it's programmed to
>count as a second) -- you can't know if your clock is running slow
>by looking at that same clock.

Some are; some are not.  I recall when upgrading my AlphaStation-200 4/166
to an AlphaStation-200 4/233 that not only was its Alpha chip replaced but
it also required a clocking module replacement.

-- 
VAXman- A Bored Certified VMS Kernel Mode Hacker    VAXman(at)TMESIS(dot)ORG

Well I speak to machines with the voice of humanity.