On 2010-02-06, David J Taylor <david-tay...@blueyonder.delete-this-bit.and-this-part.co.uk.invalid> wrote: > > "David Lord" <[email protected]> wrote in message > news:[email protected]... > [] >>>> Somehow I think I might be in sync with wrong edge of PPS. >>> >>> Why? >>> >> >> That would put pps out, but I'd have guessed by only 100ms >> if that's default. > > Yes, David, according to the Technical Specifications the default is > 100ms. I'm surprised that the parallel port is as bad as it appears to > be - perhaps some software is getting in the way of the interrupt path. > No chance it's polled rather than generating an interrupt, I suppose?
The parallel port is great ( well at least serviced by my own interrupt service routine). I doubt that the problem is with the those interrupts. But he could easily see by putting in a printout statement into the interrupt service routing to print out the time stamp. > > Cheers, > David > _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
