Date:	Mon, 15 Mar 1999 09:09:41 +0100 (CET)
From:	Ulrich Windl <wiu09524@pc3103.klinik.uni-regensburg.de>
To:	linux-kernel@vger.rutgers.edu
Subject: announce (2.0.36, enhancement): PPSkit-0.3.9

Hello,

I'd like to copy my NEWS announcement FYI. -- Ulrich

Newsgroups: comp.protocols.time.ntp
Subject: announce: PPSkit-0.3.9 for Linux 2.0.36
Reply-to: Ulrich Windl <+DELETE_THIS+Ulrich.Windl@rz.uni-regensburg.de>
--text follows this line--
I've updated the PPSkit for Linux 2.0.36. This is an important update,
because I finally tamed the 200us jitter on the PPS signal that
prevented any reasonable work!  I strongly advise any PPSkit-0.3 users
to update. (Linux 2.2 does not have this problem)

If you want to verify the jitter quick, easy and dirty, you could use
"enable_pps -j -k </dev/your_PPS_port".  (The official way is to use
"xntpdc -c kerninfo"...)

Remaining problems are the receive timestamps wandering around, and
finally wrapping at the end of a time tick, and sometime no PPS pulses
are detected on the first open after reboot (I'm using loadable
modules for the serial port).

Along with this fix come a few other cleanups (similar to those in the
0.5 version)

So, as usual, here is the NEWS and the LSM.

Enjoy,
Ulrich

P.S.: Just in time for the CeBIT ;-)

                            NEWS for 0.3.9

+ Stole a piece of Pentium timing code from Linux-2.2 to avoid the
  jitter of 200us that makes the PPS signal unusable.  This fix
  replaces the patch for ``Completely Mad Time''.

+ Updated `enable_pps.c' from PPSkit-0.6.  Updated example
  configuration file for xntpd (3-5.93, used for testing)

+ Improved accuracy of `hardware_pps()' by getting the correct time.

+ Made `TIME_ERROR' less sticky, and relax some restrictions of
  `adjtimex()'.  Ignore the bug that has to do with ``STA_FREQHOLD|STA_FLL''.

+ This release is actually a branch release, because the actual
  development is at 0.6 (Linux 2.2) now.  Don't expect exciting new
  stuff here.

Begin3
Title:          PPSkit
Version:        0.3.9
Entered-date:   1999-03-14
Description:    NTP PPS support (and other time patches) for Linux 2.0.36+
                (kernel patch, documentation, test programs)
Keywords:       NTP, PPS, kernel, xntp, time, pulse-per-second,
                synchronization, adjtimex
Author:         Ulrich.Windl@rz.uni-regensburg.de (Ulrich Windl)
Maintained-by:  Ulrich.Windl@rz.uni-regensburg.de (Ulrich Windl)
Primary-site:   linux.kernel.org /pub/linux/daemons/ntp/PPS
                37kB PPSkit-0.3.9.tar.gz
Alternate-site: 
Original-site:  pcphy4.physik.uni-regensburg.de /pub/wiu09524/PPS
                PPSkit-0.3.9.tar.gz
Platform:       RS232-compatible precision pulse-per-second with an error
                less than 200ppm (0.0002%, 0.2ms)
Copying-policy: GPL, but payment welcome!
End



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