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GitLab

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<h3>

Eric S. Raymond pushed to branch master

at <a href="https://gitlab.com/NTPsec/ntpsec">NTPsec / ntpsec</a>

</h3>

<h4>

Commits:

</h4>

<ul>

<li>

<strong><a href="https://gitlab.com/NTPsec/ntpsec/commit/be6f3dad438b16757d23adb26b76956491d65788">be6f3dad</a></strong>

<div>

<span>by Sanjeev Gupta</span>

<i>at 2016-11-29T21:53:06+08:00</i>

</div>

<pre class="commit-message" style="margin: 0; white-space: pre-wrap">Revert "Change filename for consistency, this was causing a broken link"

This reverts commit 40ddb8ead332be7f9163a7b4f689f3fde7e1da2d.

While modifying the filename, I changed the extension

from .txt to .html

</pre>

</li>

<li>

<strong><a href="https://gitlab.com/NTPsec/ntpsec/commit/b86bae296f0664a13f44328bc4b374df10b493d2">b86bae29</a></strong>

<div>

<span>by Sanjeev Gupta</span>

<i>at 2016-11-29T21:56:47+08:00</i>

</div>

<pre class="commit-message" style="margin: 0; white-space: pre-wrap">Do 40ddb8ead332be7f9163a7b4f689f3fde7e1da2d properly

I goofed up with filenames, this reverts and repatches

the filenames for the refclock includes.

</pre>

</li>

<li>

<strong><a href="https://gitlab.com/NTPsec/ntpsec/commit/fc9c27dcaa753d0c8f9b20a251c096ac4838adf7">fc9c27dc</a></strong>

<div>

<span>by Sanjeev Gupta</span>

<i>at 2016-11-29T22:10:51+08:00</i>

</div>

<pre class="commit-message" style="margin: 0; white-space: pre-wrap">Force update on NTPsec website

</pre>

</li>

<li>

<strong><a href="https://gitlab.com/NTPsec/ntpsec/commit/d3494e906048a8e5882be0f63b44a6093c01105f">d3494e90</a></strong>

<div>

<span>by Sanjeev Gupta</span>

<i>at 2016-11-29T22:15:54+08:00</i>

</div>

<pre class="commit-message" style="margin: 0; white-space: pre-wrap">"Force update on NTPsec website"

Some docs were updated in mid-Nov, but not rebuilt

on the www host.  Touching them again to force a rebuild

</pre>

</li>

</ul>

<h4>3 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#d2f8d7b7681146ceb028d0ecf24456534ff27c0a" style="text-decoration: none">

<span class="new-file" style="color: #090">

+

docs/driver_howto.txt

</span>

</a>

</li>

<li class="file-stats">

<a href="#0d825f408c38f2a1a323e7b7d34d24a241d8aa9d" style="text-decoration: none">

docs/includes/refclock.txt

</a>

</li>

<li class="file-stats">

<a href="#5fed3c939c30627618f6fcc76e9c3d7638117e85" style="text-decoration: none">

docs/rdebug.txt

</a>

</li>

</ul>

<h4>Changes:</h4>

<li id="d2f8d7b7681146ceb028d0ecf24456534ff27c0a">

<a href="https://gitlab.com/NTPsec/ntpsec/compare/68bc58be0060b5c055085187b2df3a70f22d6210...d3494e906048a8e5882be0f63b44a6093c01105f#d2f8d7b7681146ceb028d0ecf24456534ff27c0a"><strong>docs/driver_howto.txt</strong></a>

<hr>

<table class="code white" style="-premailer-cellpadding: 0; -premailer-cellspacing: 0; -premailer-width: 100%; background: #fff; font-family: monospace; font-size: 13px" bgcolor="#fff" width="100%" cellpadding="0" cellspacing="0">

<tr class="line_holder new" style="line-height: 1.5">

<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

1

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC1" class="line">= How to Write a Reference Clock Driver =</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

2

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC2" class="line"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

3

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC3" class="line">[cols="10%,90%",frame="none",grid="none",style="verse"]</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

4

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC4" class="line">|==============================</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="5" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

5

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC5" class="line">|image:pic/pogo4.gif[]|</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="6" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

6

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC6" class="line">http://www.eecis.udel.edu/%7emills/pictures.html[from 'Pogo', Walt Kelly]</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="7" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

7

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC7" class="line"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="8" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

8

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC8" class="line">You need a little magic.</span>

</pre>

</td>

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<tr class="line_holder new" style="line-height: 1.5">

<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="9" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

9

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC9" class="line"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="10" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

10

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC10" class="line">|==============================</span>

</pre>

</td>

</tr>

<tr class="line_holder new" style="line-height: 1.5">

<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="11" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

11

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC11" class="line"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="12" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

12

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC12" class="line">== Related Links ==</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC13" class="line"></span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="14" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC14" class="line">include::includes/misc.txt[]</span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="15" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC15" class="line"></span>

</pre>

</td>

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<pre style="margin: 0"><span id="LC16" class="line">== Table of Contents ==</span>

</pre>

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<pre style="margin: 0"><span id="LC17" class="line"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="18" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC18" class="line">* link:#desc[Description]</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="19" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC19" class="line">* link:#file[Files Which Need to be Changed]</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="20" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC20" class="line">* link:#intf[Interface Routine Overview]</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="21" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC21" class="line">* link:#pps[Pulse-per-Second Interface]</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="22" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC22" class="line"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="23" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC23" class="line">'''''</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="24" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC24" class="line"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="25" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC25" class="line">== When Not to Write a Driver ==</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="26" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC26" class="line"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="27" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC27" class="line">If the device you are trying to support is an exotic GPS, you should</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="28" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC28" class="line">probably not write an +ntpd+ driver for it.  Instead, check to see if</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="29" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC29" class="line">it is already supported by {GPSD}, a project with which NTPsec</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="30" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC30" class="line">cooperates closely.  The GPSD people are specialists in managing GPSes</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="31" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC31" class="line">and better at it than we are, supporting a much broader range of</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="32" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC32" class="line">devices, and GPSD is designed to feed clock samples to +ntpd+ from any</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="33" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC33" class="line">of them.  If you need to write a driver for a GPS, they'll take it and</span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="34" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC34" class="line">should have it.</span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="35" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC35" class="line"></span>

</pre>

</td>

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<pre style="margin: 0"><span id="LC36" class="line">If you have a non-GPS time source (like a time radio or GPSDO) that</span>

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<pre style="margin: 0"><span id="LC37" class="line">you want to support, consider link:generic_howto.html[writing a mode</span>

</pre>

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<pre style="margin: 0"><span id="LC38" class="line">for it in the generic driver] rather than a full driver of its own;</span>

</pre>

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<pre style="margin: 0"><span id="LC39" class="line">this will be easier.  The generic driver is so called because it</span>

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<pre style="margin: 0"><span id="LC40" class="line">factors out a lot of I/O and housekeeping code common to all drivers,</span>

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<td class="diff-line-num new new_line" data-linenumber="41" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC41" class="line">allowing you support a new device type by writing only a parser for</span>

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<pre style="margin: 0"><span id="LC42" class="line">its sentences.</span>

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<pre style="margin: 0"><span id="LC43" class="line"></span>

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<pre style="margin: 0"><span id="LC44" class="line">[[desc]]</span>

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<pre style="margin: 0"><span id="LC45" class="line">== Structure of a Driver ==</span>

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<pre style="margin: 0"><span id="LC46" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC47" class="line">NTP reference clock support maintains the fiction that the clock is</span>

</pre>

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<pre style="margin: 0"><span id="LC48" class="line">actually an ordinary server in the NTP tradition, but operating at a</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="49" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC49" class="line">synthetic stratum of zero. The entire suite of algorithms filter the</span>

</pre>

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<pre style="margin: 0"><span id="LC50" class="line">received data and select the best sources to correct the system clock.</span>

</pre>

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<pre style="margin: 0"><span id="LC51" class="line">No packets are exchanged with a reference clock; however, the transmit,</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="52" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC52" class="line">receive and packet procedures are replaced with code to simulate them.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="53" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC53" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC54" class="line">The driver assumes three timescales: standard time maintained by a</span>

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<pre style="margin: 0"><span id="LC55" class="line">distant laboratory such as USNO or NIST, reference time maintained by</span>

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<pre style="margin: 0"><span id="LC56" class="line">the external radio and the system time maintained by NTP. The radio</span>

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<pre style="margin: 0"><span id="LC57" class="line">synchronizes reference time via radio, satellite or modem. As the</span>

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<td class="diff-line-num new new_line" data-linenumber="58" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC58" class="line">transmission means may not always be reliable, most radios continue to</span>

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<pre style="margin: 0"><span id="LC59" class="line">provide clock updates for some time after signal loss using an internal</span>

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<pre style="margin: 0"><span id="LC60" class="line">reference oscillator. In such cases the radio may or may not reveal the</span>

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<pre style="margin: 0"><span id="LC61" class="line">time since last synchronized or the estimated time error.</span>

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<pre style="margin: 0"><span id="LC62" class="line"></span>

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<pre style="margin: 0"><span id="LC63" class="line">All three timescales run only in Coordinated Universal Time (UTC) and</span>

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<pre style="margin: 0"><span id="LC64" class="line">are not adjusted for local timezone or standard/daylight time. The local</span>

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<pre style="margin: 0"><span id="LC65" class="line">timezone, standard/daylight indicator and year, if provided, are</span>

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<pre style="margin: 0"><span id="LC66" class="line">ignored. However, it is important to determine whether a leap second is</span>

</pre>

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<pre style="margin: 0"><span id="LC67" class="line">to be inserted in the UTC timescale in the near future so NTP can insert</span>

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<pre style="margin: 0"><span id="LC68" class="line">it in the system timescale at the appropriate epoch.</span>

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<pre style="margin: 0"><span id="LC69" class="line"></span>

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<pre style="margin: 0"><span id="LC70" class="line">The interface routines in the +ntp_refclock.c+ source file call the</span>

</pre>

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<pre style="margin: 0"><span id="LC71" class="line">following driver routines via a transfer vector:</span>

</pre>

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<pre style="margin: 0"><span id="LC72" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC73" class="line">+startup+::</span>

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<td class="diff-line-num new new_line" data-linenumber="74" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC74" class="line">  The association has just been mobilized. The driver may allocate a</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="75" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC75" class="line">  private structure and open the device(s) required.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="76" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC76" class="line">+shutdown+::</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="77" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC77" class="line">  The association is about to be demobilized. The driver should close</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="78" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC78" class="line">  all device(s) and free private structures.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="79" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC79" class="line">+receive+::</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="80" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC80" class="line">  A timecode string is ready for retrieval using the +refclock_gtlin()+</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="81" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC81" class="line">  or +refclock_gtraw()+ routines and provide clock updates.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="82" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC82" class="line">+poll+::</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="83" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC83" class="line">  Called at poll timeout, by default 64 s. Ordinarily, the driver will</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="84" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC84" class="line">  send a poll sequence to the radio as required.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="85" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC85" class="line">+timer+::</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="86" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC86" class="line">  Called once per second. This can be used for housekeeping functions.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="87" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC87" class="line">  In the case with pulse-per-second (PPS) signals, this can be used to</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="88" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC88" class="line">  process the signals and provide clock updates.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="89" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC89" class="line"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="90" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC90" class="line">The receive routine retrieves a timecode string via serial or parallel</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="91" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC91" class="line">port, PPS signal or other means. It decodes the timecode in days, hours,</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="92" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC92" class="line">minutes, seconds and nanoseconds and checks for errors. It provides</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="93" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC93" class="line">these data along with the on-time timestamp to the +refclock_process+</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="94" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC94" class="line">routine, which saves the computed offset in a 60-sample circular buffer.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="95" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC95" class="line">On occasion, either by timeout, sample count or call to the poll</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="96" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC96" class="line">routine, the driver calls +refclock_receive+ to process the circular</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="97" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC97" class="line">buffer samples and update the system clock.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="98" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC98" class="line"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="99" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC99" class="line">The best way to understand how the clock drivers work is to study one of</span>

</pre>

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<pre style="margin: 0"><span id="LC100" class="line">the drivers already implemented, such as +refclock_spectracom.c+. The</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="101" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC101" class="line">main interface is the +refclockproc+ structure, which contains for most</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="102" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC102" class="line">drivers the decoded timecode, on-time timestamp, reference timestamp,</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="103" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC103" class="line">exception reports and statistics tallies, etc. The support routines are</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="104" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC104" class="line">passed a pointer to the +peer+ structure, which contains a pointer to</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="105" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC105" class="line">the +refclockproc+ structure, which in turn contains a pointer to the</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="106" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC106" class="line">unit structure, if used. For legacy purposes, a table</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="107" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC107" class="line">+typeunit[type][unit]+ contains the peer structure pointer for each</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="108" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC108" class="line">configured clock type and unit. This structure should not be used for</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="109" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC109" class="line">new implementations.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="110" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC110" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC111" class="line">Radio and modem reference clocks by convention have addresses of the</span>

</pre>

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<pre style="margin: 0"><span id="LC112" class="line">form +127.127.t.u+, where _t_ is the clock type and _u_ in the range 0-3</span>

</pre>

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<pre style="margin: 0"><span id="LC113" class="line">is used to distinguish multiple instances of clocks of the same type.</span>

</pre>

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<pre style="margin: 0"><span id="LC114" class="line">These addresses used to be exposed as part of the refclock</span>

</pre>

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<pre style="margin: 0"><span id="LC115" class="line">configuration syntax, but are no longer.  Nothing in ntpd now actually</span>

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<pre style="margin: 0"><span id="LC116" class="line">requires this form of address for clocks, but it is still generated</span>

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<pre style="margin: 0"><span id="LC117" class="line">so as not to hand surprises to legacy +ntpq+ instances that still make</span>

</pre>

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<pre style="margin: 0"><span id="LC118" class="line">the assumption.</span>

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<pre style="margin: 0"><span id="LC119" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC120" class="line">Most clocks require a serial or parallel port or special bus peripheral.</span>

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<pre style="margin: 0"><span id="LC121" class="line">The particular device is normally specified by adding a soft link</span>

</pre>

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<pre style="margin: 0"><span id="LC122" class="line">+/dev/deviceu+ to the particular hardware device.</span>

</pre>

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<pre style="margin: 0"><span id="LC123" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC124" class="line">By convention, reference clock drivers are named in the form</span>

</pre>

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<pre style="margin: 0"><span id="LC125" class="line">+refclock_xxxx.c+, where +xxxx+ is a unique string. Each driver is</span>

</pre>

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<pre style="margin: 0"><span id="LC126" class="line">assigned a unique long-form driver name, short-form driver name and</span>

</pre>

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<pre style="margin: 0"><span id="LC127" class="line">device name. The existing assignments are in the</span>

</pre>

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<pre style="margin: 0"><span id="LC128" class="line">link:refclock.html[Reference Clock Drivers] page and its dependencies.</span>

</pre>

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<pre style="margin: 0"><span id="LC129" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC130" class="line">== Conventions, Fudge Factors and Flags ==</span>

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<pre style="margin: 0"><span id="LC131" class="line"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="132" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC132" class="line">Most drivers support manual or automatic calibration for systematic</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="133" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC133" class="line">offset bias using values encoded in the +refclock+ configuration command.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="134" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC134" class="line">By convention, the +time1+ value defines the calibration offset in</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="135" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC135" class="line">seconds. For those drivers that support statistics collection using the</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="136" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC136" class="line">+filegen+ utility and the +clockstats+ file, the +flag4+ switch enables</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="137" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC137" class="line">the utility.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="138" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC138" class="line"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="139" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC139" class="line">If the calibration feature has been enabled, the +flag1+ switch is set</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="140" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC140" class="line">and the PPS signal is actively disciplining the system time, the +time1+</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="141" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC141" class="line">value is automatically adjusted to maintain a residual offset of zero.</span>

</pre>

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<pre style="margin: 0"><span id="LC142" class="line">Once the its value has stabilized, the value can be inserted in the</span>

</pre>

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<pre style="margin: 0"><span id="LC143" class="line">configuration file and the calibration feature disabled.</span>

</pre>

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<pre style="margin: 0"><span id="LC144" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC145" class="line">[[file]]</span>

</pre>

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<pre style="margin: 0"><span id="LC146" class="line">== Files Which Need to be Changed ==</span>

</pre>

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<pre style="margin: 0"><span id="LC147" class="line"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="148" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC148" class="line">When a new reference clock driver is installed, the following files need</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="149" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC149" class="line">to be edited. Note that changes are also necessary to properly integrate</span>

</pre>

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<pre style="margin: 0"><span id="LC150" class="line">the driver in the configuration and makefile scripts, but these are</span>

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<pre style="margin: 0"><span id="LC151" class="line">decidedly beyond the scope of this page.</span>

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<pre style="margin: 0"><span id="LC152" class="line"></span>

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<pre style="margin: 0"><span id="LC153" class="line">+./include/ntp.h+::</span>

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<pre style="margin: 0"><span id="LC154" class="line">  The reference clock type defines are used in many places. Each driver</span>

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<td class="diff-line-num new new_line" data-linenumber="155" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC155" class="line">  is assigned a unique type number. Unused numbers are clearly marked in</span>

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<td class="diff-line-num new new_line" data-linenumber="156" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC156" class="line">  the list. A unique +REFCLK_xxxx+ identification code should be</span>

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<pre style="margin: 0"><span id="LC157" class="line">  recorded in the list opposite its assigned type number.</span>

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<td class="diff-line-num new new_line" data-linenumber="158" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC158" class="line">+./libntp/clocktypes.c+::</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="159" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC159" class="line">  The +./libntp/clktype+ array is used by certain display functions. A</span>

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<pre style="margin: 0"><span id="LC160" class="line">  unique short-form name of the driver should be entered together with</span>

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<pre style="margin: 0"><span id="LC161" class="line">  its assigned identification code.</span>

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<td class="diff-line-num new new_line" data-linenumber="162" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC162" class="line">+./ntpd/ntp_control.c+::</span>

</pre>

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<pre style="margin: 0"><span id="LC163" class="line">  The +clocktypes+ array is used for certain control message displays</span>

</pre>

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<pre style="margin: 0"><span id="LC164" class="line">  functions. It should be initialized with the reference clock class</span>

</pre>

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<pre style="margin: 0"><span id="LC165" class="line">  assigned to the driver, as per the NTP specification RFC-1305. See the</span>

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<td class="diff-line-num new new_line" data-linenumber="166" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC166" class="line">  +./include/ntp_control.h+ header file for the assigned classes.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="167" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC167" class="line">+./ntpd/refclock_conf.c+::</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="168" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC168" class="line">  This file contains a list of external structure definitions which are</span>

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<pre style="margin: 0"><span id="LC169" class="line">  conditionally defined. A new set of entries should be installed</span>

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<pre style="margin: 0"><span id="LC170" class="line">  similar to those already in the table. The +refclock_conf+ array is a</span>

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<pre style="margin: 0"><span id="LC171" class="line">  set of pointers to transfer vectors in the individual drivers. The</span>

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<pre style="margin: 0"><span id="LC172" class="line">  external name of the transfer vector should be initialized in</span>

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<pre style="margin: 0"><span id="LC173" class="line">  correspondence with the type number.</span>

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<pre style="margin: 0"><span id="LC174" class="line"></span>

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<pre style="margin: 0"><span id="LC175" class="line">[[intf]]</span>

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<pre style="margin: 0"><span id="LC176" class="line">== Interface Routine Overview ==</span>

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<pre style="margin: 0"><span id="LC177" class="line"></span>

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<pre style="margin: 0"><span id="LC178" class="line">+refclock_newpeer+ - initialize and start a reference clock.::</span>

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<pre style="margin: 0"><span id="LC179" class="line">  This routine allocates and initializes the interface structure which</span>

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<pre style="margin: 0"><span id="LC180" class="line">  supports a reference clock in the form of an ordinary NTP peer. A</span>

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<pre style="margin: 0"><span id="LC181" class="line">  driver-specific support routine completes the initialization, if used.</span>

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<pre style="margin: 0"><span id="LC182" class="line">  Default peer variables which identify the clock and establish its</span>

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<pre style="margin: 0"><span id="LC183" class="line">  reference ID and stratum are set here. It returns one if success and</span>

</pre>

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<pre style="margin: 0"><span id="LC184" class="line">  zero if the clock address is invalid or already running, insufficient</span>

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<pre style="margin: 0"><span id="LC185" class="line">  resources are available or the driver declares a bum rap.</span>

</pre>

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<pre style="margin: 0"><span id="LC186" class="line">+refclock_unpeer+ - shut down a clock::</span>

</pre>

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<pre style="margin: 0"><span id="LC187" class="line">  This routine is used to shut down a clock and return its resources to</span>

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<pre style="margin: 0"><span id="LC188" class="line">  the system.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="189" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC189" class="line">+refclock_transmit+ - simulate the transmit procedure::</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="190" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC190" class="line">  This routine implements the NTP transmit procedure for a reference</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="191" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC191" class="line">  clock. This provides a mechanism to call the driver at the NTP poll</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="192" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC192" class="line">  interval, as well as provides a reachability mechanism to detect a</span>

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<td class="diff-line-num new new_line" data-linenumber="193" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC193" class="line">  broken radio or other madness.</span>

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<td class="diff-line-num new new_line" data-linenumber="194" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC194" class="line">+refclock_process+ - insert a sample in the circular buffer::</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="195" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC195" class="line">  This routine saves the offset computed from the on-time timestamp and</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="196" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC196" class="line">  the days, hours, minutes, seconds and nanoseconds in the circular</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="197" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC197" class="line">  buffer. Note that no provision is included for the year, as provided</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="198" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC198" class="line">  by some (but not all) radio clocks. Ordinarily, the year is implicit</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="199" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC199" class="line">  in the Unix file system and hardware/software clock support, so this</span>

</pre>

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<pre style="margin: 0"><span id="LC200" class="line">  is ordinarily not a problem.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="201" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC201" class="line">+refclock_receive+ - simulate the receive and packet procedures::</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="202" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC202" class="line">  This routine simulates the NTP receive and packet procedures for a</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="203" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC203" class="line">  reference clock. This provides a mechanism in which the ordinary NTP</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="204" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC204" class="line">  filter, selection and combining algorithms can be used to suppress</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="205" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC205" class="line">  misbehaving radios and to mitigate between them when more than one is</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="206" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC206" class="line">  available for backup.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="207" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC207" class="line">+refclock_gtraw+, +refclock_gtlin+ - read the buffer and on-time timestamp::</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="208" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC208" class="line">  These routines return the data received from the clock and the on-time</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="209" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC209" class="line">  timestamp. The +refclock_gtraw+ routine returns a batch of one or more</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="210" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC210" class="line">  characters returned by the Unix terminal routines in raw mode. The</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="211" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC211" class="line">  +refclock_gtlin+ routine removes the parity bit and control characters</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="212" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC212" class="line">  and returns all the characters up to and including the line</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="213" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC213" class="line">  terminator. Either routine returns the number of characters delivered.</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="214" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC214" class="line">+refclock_open+ - open a serial port for reference clock::</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="215" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC215" class="line">  This routine opens a serial port for I/O and sets default options. It</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="216" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC216" class="line">  returns the file descriptor if success and zero if failure.</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="217" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC217" class="line">+refclock_ioctl+ - set serial port control functions::</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="218" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC218" class="line">  This routine attempts to hide the internal, system-specific details of</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="219" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC219" class="line">  serial ports. It can handle POSIX (+termios+), SYSV (+termio+) and BSD</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="220" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC220" class="line">  (+sgtty+) interfaces with varying degrees of success. The routine</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="221" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC221" class="line">  returns one if success and zero if failure.</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="222" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC222" class="line">+refclock_ppsapi+::</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="223" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC223" class="line">  This routine initializes the Pulse-per-Second interface (see below).</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="224" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC224" class="line">+refclock_pps+::</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="225" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC225" class="line">  This routine is called once per second to read the latest PPS offset</span>

</pre>

</td>

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<pre style="margin: 0"><span id="LC226" class="line">  and save it in the circular buffer (see below).</span>

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<pre style="margin: 0"><span id="LC227" class="line"></span>

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<pre style="margin: 0"><span id="LC228" class="line">[[pps]]</span>

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<pre style="margin: 0"><span id="LC229" class="line">== Pulse-per-Second Interface ==</span>

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<pre style="margin: 0"><span id="LC230" class="line"></span>

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<pre style="margin: 0"><span id="LC231" class="line">When the Pulse-per-Second Application Interface (RFC 2783) is present, a</span>

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<pre style="margin: 0"><span id="LC232" class="line">compact PPS interface is available to all drivers. See the</span>

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<pre style="margin: 0"><span id="LC233" class="line">link:prefer.html[Mitigation Rules and the Prefer Peer] page for further</span>

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<pre style="margin: 0"><span id="LC234" class="line">information. To use this interface, include the +timeppps.h+ and</span>

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<pre style="margin: 0"><span id="LC235" class="line">+refclock_pps.h+ header files and define the +refclock_ppsctl+ structure</span>

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<pre style="margin: 0"><span id="LC236" class="line">in the driver private storage. The +timepps.h+ file is specific to each</span>

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<pre style="margin: 0"><span id="LC237" class="line">operating system and may not be available for some systems.</span>

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<pre style="margin: 0"><span id="LC238" class="line"></span>

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<pre style="margin: 0"><span id="LC239" class="line">To use the interface, call +refclock_ppsapi+ from the startup routine</span>

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<pre style="margin: 0"><span id="LC240" class="line">passing the device file descriptor and +refclock_ppsctl+ structure</span>

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<pre style="margin: 0"><span id="LC241" class="line">pointer. Then, call +refclock_pps+ from the timer routine passing the</span>

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<pre style="margin: 0"><span id="LC242" class="line">association pointer and +refclock_ppsctl+ structure pointer. See the</span>

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<pre style="margin: 0"><span id="LC243" class="line">+refclock_pps.c+ file for examples and calling sequences. If the PPS</span>

</pre>

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<pre style="margin: 0"><span id="LC244" class="line">signal is valid, the offset sample will be save in the circular buffer</span>

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<pre style="margin: 0"><span id="LC245" class="line">and a bit set in the association flags word indicating the sample is</span>

</pre>

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<pre style="margin: 0"><span id="LC246" class="line">valid and the driver an be selected as a PPS peer. If this bit is set</span>

</pre>

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<pre style="margin: 0"><span id="LC247" class="line">when the poll routine is called, the driver calls the</span>

</pre>

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<pre style="margin: 0"><span id="LC248" class="line">+refclock_receive+ routine to process the samples in the circular</span>

</pre>

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<pre style="margin: 0"><span id="LC249" class="line">buffer and update the system clock.</span>

</pre>

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<pre style="margin: 0"><span id="LC250" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC251" class="line">'''''</span>

</pre>

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<pre style="margin: 0"><span id="LC252" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC253" class="line">image:pic/pogo1a.gif[]</span>

</pre>

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<pre style="margin: 0"><span id="LC254" class="line"></span>

</pre>

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<pre style="margin: 0"><span id="LC255" class="line">include::includes/footer.txt[]</span></pre>

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<br>

</li>

<li id="0d825f408c38f2a1a323e7b7d34d24a241d8aa9d">

<a href="https://gitlab.com/NTPsec/ntpsec/compare/68bc58be0060b5c055085187b2df3a70f22d6210...d3494e906048a8e5882be0f63b44a6093c01105f#0d825f408c38f2a1a323e7b7d34d24a241d8aa9d"><strong>docs/includes/refclock.txt</strong></a>

<hr>

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<pre style="margin: 0"><span id="LC1" class="line">=== Reference Clock Support ===</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

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<pre style="margin: 0"><span id="LC2" class="line">* link:extern.html[External Clock Discipline and the Local Clock Driver]</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3" style="background: #f9d7dc; border-right-color: #fac5cd; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#f9d7dc">

3

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<td class="diff-line-num new_line old" data-linenumber="3" style="background: #f9d7dc; border-right-color: #fac5cd; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#f9d7dc">

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<td class="line_content noteable_line old" style="background: #fbe9eb; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#fbe9eb">

<pre style="margin: 0"><span id="LC3" class="line">* link:driver_howto.html[How to Write a Reference Clock Driver]</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0"><span id="LC3" class="line">* link:driver_howto.html[How to Write a Reference Clock Driver]<span class="idiff left right"> </span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

4

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<td class="diff-line-num new_line" data-linenumber="4" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em">

<pre style="margin: 0"><span id="LC4" class="line">* link:generic_howto.html[How to build new generic clocks]</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="5" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

5

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<td class="diff-line-num new_line" data-linenumber="5" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em">

<pre style="margin: 0"><span id="LC5" class="line">* link:refclock.html[Reference Clock Drivers]</span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="6" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em">

<pre style="margin: 0"><span id="LC6" class="line">* link:sitemap.html[Site Map]</span>

</pre>

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<li id="5fed3c939c30627618f6fcc76e9c3d7638117e85">

<a href="https://gitlab.com/NTPsec/ntpsec/compare/68bc58be0060b5c055085187b2df3a70f22d6210...d3494e906048a8e5882be0f63b44a6093c01105f#5fed3c939c30627618f6fcc76e9c3d7638117e85"><strong>docs/rdebug.txt</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="11" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="11" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="background: #fafafa; color: rgba(0,0,0,0.3); padding-left: 0.5em; padding-right: 0.5em" bgcolor="#fafafa">@@ -11,7 +11,7 @@ Call the girls and they'll sweep your bugs.</td>

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<td class="diff-line-num old_line" data-linenumber="11" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

11

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<td class="diff-line-num new_line" data-linenumber="11" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

11

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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em">

<pre style="margin: 0"><span id="LC11" class="line"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="12" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

12

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<td class="diff-line-num new_line" data-linenumber="12" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

12

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<pre style="margin: 0"><span id="LC12" class="line">== Related Links ==</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="13" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="13" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

13

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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em">

<pre style="margin: 0"><span id="LC13" class="line"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="14" style="background: #f9d7dc; border-right-color: #fac5cd; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#f9d7dc">

14

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<td class="diff-line-num new_line old" data-linenumber="14" style="background: #f9d7dc; border-right-color: #fac5cd; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#f9d7dc">

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<td class="line_content noteable_line old" style="background: #fbe9eb; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#fbe9eb">

<pre style="margin: 0"><span id="LC14" class="line">include::includes/refclock.txt[]</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="15" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="14" style="background: #ddfbe6; border-right-color: #c7f0d2; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#ddfbe6">

14

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<td class="line_content new noteable_line" style="background: #ecfdf0; padding-left: 0.5em; padding-right: 0.5em" bgcolor="#ecfdf0">

<pre style="margin: 0"><span id="LC14" class="line">include::includes/refclock.txt[]<span class="idiff left right"> </span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="15" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

15

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<td class="diff-line-num new_line" data-linenumber="15" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

15

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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em">

<pre style="margin: 0"><span id="LC15" class="line">include::includes/install.txt[]</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="16" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

16

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<td class="diff-line-num new_line" data-linenumber="16" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

16

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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em">

<pre style="margin: 0"><span id="LC16" class="line"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="17" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

17

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<td class="diff-line-num new_line" data-linenumber="17" style="background: #fafafa; border-right-color: #f0f0f0; border-right-style: solid; border-right-width: 1px; color: rgba(0,0,0,0.3); padding: 0 5px; text-align: right; width: 35px" align="right" bgcolor="#fafafa">

17

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<td class="line_content noteable_line" style="padding-left: 0.5em; padding-right: 0.5em">

<pre style="margin: 0"><span id="LC17" class="line">'''''</span>

</pre>

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