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	<id>https://gunkies.org/index.php?action=history&amp;feed=atom&amp;title=DN87%2FDN87S_Universal_Synchronous%2FAsynchronous_Communications_Front_End_Subsystem</id>
	<title>DN87/DN87S Universal Synchronous/Asynchronous Communications Front End Subsystem - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://gunkies.org/index.php?action=history&amp;feed=atom&amp;title=DN87%2FDN87S_Universal_Synchronous%2FAsynchronous_Communications_Front_End_Subsystem"/>
	<link rel="alternate" type="text/html" href="https://gunkies.org/w/index.php?title=DN87/DN87S_Universal_Synchronous/Asynchronous_Communications_Front_End_Subsystem&amp;action=history"/>
	<updated>2026-10-04T01:31:20Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://gunkies.org/w/index.php?title=DN87/DN87S_Universal_Synchronous/Asynchronous_Communications_Front_End_Subsystem&amp;diff=31843&amp;oldid=prev</id>
		<title>Jnc: /* External links */ Bleah - forgot the title</title>
		<link rel="alternate" type="text/html" href="https://gunkies.org/w/index.php?title=DN87/DN87S_Universal_Synchronous/Asynchronous_Communications_Front_End_Subsystem&amp;diff=31843&amp;oldid=prev"/>
		<updated>2023-11-07T15:29:03Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;External links: &lt;/span&gt; Bleah - forgot the title&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 15:29, 7 November 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l16&quot;&gt;Line 16:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 16:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [http://www.bitsavers.org/pdf/dec/pdp10/periph/MP00068_DN87_Universal_Comm_System_Front_End_Jan76.pdf DN87 Field Maintenance Print Set] (MP00068)&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [http://www.bitsavers.org/pdf/dec/pdp10/periph/MP00068_DN87_Universal_Comm_System_Front_End_Jan76.pdf DN87 Field Maintenance Print Set] (MP00068)&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [http://www.bitsavers.org/pdf/dec/pdp10/KL10/EK-108OU-PD-002_KL10-Based_Physical_Description_Mar77.pdf &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;m&lt;/del&gt;] - the DN87/DN87S is covered in Sections 1.9/1.10&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [http://www.bitsavers.org/pdf/dec/pdp10/KL10/EK-108OU-PD-002_KL10-Based_Physical_Description_Mar77.pdf &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;KL10-Based Physical Description&lt;/ins&gt;] - the DN87/DN87S is covered in Sections 1.9/1.10&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [http://www.bitsavers.org/pdf/dec/pdp10/TOPS10/training/DECsystem-10_Data_Communications_Products_For_Software_Specialists_Jul78.pdf DECsystem-10 Data Communications Products]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [http://www.bitsavers.org/pdf/dec/pdp10/TOPS10/training/DECsystem-10_Data_Communications_Products_For_Software_Specialists_Jul78.pdf DECsystem-10 Data Communications Products]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category: PDP-10 Peripherals]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category: PDP-10 Peripherals]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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		<author><name>Jnc</name></author>
	</entry>
	<entry>
		<id>https://gunkies.org/w/index.php?title=DN87/DN87S_Universal_Synchronous/Asynchronous_Communications_Front_End_Subsystem&amp;diff=31837&amp;oldid=prev</id>
		<title>Jnc: Jnc moved page DN87 Universal Synchronous/Asynchronous Communications Front End Subsystem to DN87/DN87S Universal Synchronous/Asynchronous Communications Front End Subsystem: One page covers both</title>
		<link rel="alternate" type="text/html" href="https://gunkies.org/w/index.php?title=DN87/DN87S_Universal_Synchronous/Asynchronous_Communications_Front_End_Subsystem&amp;diff=31837&amp;oldid=prev"/>
		<updated>2023-11-07T15:15:21Z</updated>

		<summary type="html">&lt;p&gt;Jnc moved page &lt;a href=&quot;/wiki/DN87_Universal_Synchronous/Asynchronous_Communications_Front_End_Subsystem&quot; class=&quot;mw-redirect&quot; title=&quot;DN87 Universal Synchronous/Asynchronous Communications Front End Subsystem&quot;&gt;DN87 Universal Synchronous/Asynchronous Communications Front End Subsystem&lt;/a&gt; to &lt;a href=&quot;/wiki/DN87/DN87S_Universal_Synchronous/Asynchronous_Communications_Front_End_Subsystem&quot; title=&quot;DN87/DN87S Universal Synchronous/Asynchronous Communications Front End Subsystem&quot;&gt;DN87/DN87S Universal Synchronous/Asynchronous Communications Front End Subsystem&lt;/a&gt;: One page covers both&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 15:15, 7 November 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;4&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
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		<author><name>Jnc</name></author>
	</entry>
	<entry>
		<id>https://gunkies.org/w/index.php?title=DN87/DN87S_Universal_Synchronous/Asynchronous_Communications_Front_End_Subsystem&amp;diff=31836&amp;oldid=prev</id>
		<title>Jnc: Covers the basics</title>
		<link rel="alternate" type="text/html" href="https://gunkies.org/w/index.php?title=DN87/DN87S_Universal_Synchronous/Asynchronous_Communications_Front_End_Subsystem&amp;diff=31836&amp;oldid=prev"/>
		<updated>2023-11-07T15:13:52Z</updated>

		<summary type="html">&lt;p&gt;Covers the basics&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;The &amp;#039;&amp;#039;&amp;#039;DN87/DN87S Universal Synchronous/Asynchronous Communications Front End Subsystem&amp;#039;&amp;#039;&amp;#039; was a [[front end]] subsystem for the [[PDP-10]] which supported a large number of [[serial line]]s - a mixture of both [[synchronous serial line]]s and [[asynchronous serial line]]s.&lt;br /&gt;
&lt;br /&gt;
It was built around a [[PDP-11/40]], to which were added a number of interface [[peripheral]]s:&lt;br /&gt;
&lt;br /&gt;
* [[DH11 asynchronous serial line interface]]&lt;br /&gt;
* [[DQ11 NPR Synchronous Line Interface]]&lt;br /&gt;
&lt;br /&gt;
Options included:&lt;br /&gt;
&lt;br /&gt;
* [[KG11-A Exclusive-OR and CRC Block Check Option]]&lt;br /&gt;
* [[DN11 Automatic Calling Unit Interface]]&lt;br /&gt;
&lt;br /&gt;
To connect up to the PDP-10, the DN87 used a [[DL10 PDP-11 Data Link‎|DL10]]. The DN87S was identical to the DN87, except that it used a [[DTE20 Ten-Eleven Interface|DTE20]] for its connection (and thus could only be used on a [[KL10]]).&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
* [http://www.bitsavers.org/pdf/dec/pdp10/periph/MP00068_DN87_Universal_Comm_System_Front_End_Jan76.pdf DN87 Field Maintenance Print Set] (MP00068)&lt;br /&gt;
* [http://www.bitsavers.org/pdf/dec/pdp10/KL10/EK-108OU-PD-002_KL10-Based_Physical_Description_Mar77.pdf m] - the DN87/DN87S is covered in Sections 1.9/1.10&lt;br /&gt;
* [http://www.bitsavers.org/pdf/dec/pdp10/TOPS10/training/DECsystem-10_Data_Communications_Products_For_Software_Specialists_Jul78.pdf DECsystem-10 Data Communications Products]&lt;br /&gt;
&lt;br /&gt;
[[Category: PDP-10 Peripherals]]&lt;/div&gt;</summary>
		<author><name>Jnc</name></author>
	</entry>
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