[ntp:questions] Assistance with PPS on Windows
unruh at wormhole.physics.ubc.ca
Fri May 6 01:07:01 UTC 2011
On 2011-05-05, E-Mail Sent to this address will be added to the BlackLists <Null at BlackList.Anitech-Systems.invalid> wrote:
> unruh wrote:
>> Uh, no. There is no way of getting the signal into the
>> computer with nanosecond accuracy. 1usec is about it.
>> The interrupt service routines, if you use a specialised
>> driver for some interrupt driven card, will take about
>> 1usec to service the interrupt.
> IIRC some BSD variants were claiming to get ~<150ns?
I do not believe that you can service an interrupt, and read a system clock
that quickly. If you have specialised hardware on the PC (as someone
suggested, a card with a counter on it which is switched on when the
signal comes in) perhaps.
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