Yo Jim! On Mon, 24 Sep 2012 21:04:14 -0500 Jim Thompson wrote: > ntpd won't enable the PPS stuff, because the ioctl to 'discover' same > fails. Thus one uses gpsd. > covered on-list back in June/July Moot. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701 gem@rellim.com Tel:+1(541)382-8588 > On Sep 24, 2012, at 8:58 PM, "Gary E. Miller" wrote: > > > Yo Jim! > > > > On Mon, 24 Sep 2012 20:49:42 -0500 > > Jim Thompson wrote: > > > >> > >> On Sep 24, 2012, at 5:32 PM, Gary E. Miller wrote: > >> > >>> Yo Jim! > >>> > >>> On Sun, 23 Sep 2012 00:07:43 -0500 > >>> Jim Thompson wrote: > >>> > >>>> They don't work that we'll on FreeBSD. > >>> > >>> Really? First I've heard of it. What's the issue? > >> > >> In a word: jitter > > > > And how much jitter? The lack of RFC2783 should not be noticeable > > since the jitter on the USB serial is so large. RFC2783 helps in > > the micro Second range and the USB serial is in the milli Second > > range. > > > > So with, and without you are going to get about 1 milli Second > > jitter. > > > > So, what problem are you pointing up with *BSD? > > > >> Compare: > >> http://fxr.watson.org/fxr/source/dev/uart/uart_core.c?v=FREEBSD9 > >> and > >> http://fxr.watson.org/fxr/source/dev/sio/sio.c?v=FREEBSD9 > >> and > >> http://fxr.watson.org/fxr/source/pc98/cbus/sio.c?v=FREEBSD9 > >> > >> to anything found in > >> > >> http://fxr.watson.org/fxr/source/dev/usb/serial/?v=FREEBSD9 > > > > Not sure what you are trying to show me. > > > > RGDS > > GARY > > --------------------------------------------------------------------------- > > Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR > > 97701 gem@rellim.com Tel:+1(541)382-8588 >