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	<id>https://wiki.retrotechcollection.com/index.php?action=history&amp;feed=atom&amp;title=File%3AIBM_PC_AT_5170_Technical_Reference_Sep85.pdf</id>
	<title>File:IBM PC AT 5170 Technical Reference Sep85.pdf - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://wiki.retrotechcollection.com/index.php?action=history&amp;feed=atom&amp;title=File%3AIBM_PC_AT_5170_Technical_Reference_Sep85.pdf"/>
	<link rel="alternate" type="text/html" href="https://wiki.retrotechcollection.com/index.php?title=File:IBM_PC_AT_5170_Technical_Reference_Sep85.pdf&amp;action=history"/>
	<updated>2026-09-28T22:57:25Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://wiki.retrotechcollection.com/index.php?title=File:IBM_PC_AT_5170_Technical_Reference_Sep85.pdf&amp;diff=13196&amp;oldid=prev</id>
		<title>Josh: P4 verification: real File: description - document identity from its own title page, page count, honest source note and honest licence block</title>
		<link rel="alternate" type="text/html" href="https://wiki.retrotechcollection.com/index.php?title=File:IBM_PC_AT_5170_Technical_Reference_Sep85.pdf&amp;diff=13196&amp;oldid=prev"/>
		<updated>2026-09-24T23:18:38Z</updated>

		<summary type="html">&lt;p&gt;P4 verification: real File: description - document identity from its own title page, page count, honest source note and honest licence block&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw-interface=&quot;&quot;&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 00:18, 25 September 2026&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-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&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;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Official &lt;/del&gt;IBM Personal Computer AT &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;(5170) &lt;/del&gt;Technical Reference. &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Updated &lt;/del&gt;edition &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;covering &lt;/del&gt;all &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;motherboard &lt;/del&gt;types including the Type 2 &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;(Baby AT) &lt;/del&gt;and the 06/10/85 BIOS &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;revision. IBM part number 6280070, September 1985&lt;/del&gt;.&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;The &#039;&#039;&#039;&lt;/ins&gt;IBM Personal Computer AT Technical Reference&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;, &#039;&#039;&#039;September 1985&#039;&#039;&#039;, &#039;&#039;&#039;IBM part number 6280070&#039;&#039;&#039;, is the 500-page revised technical reference for the IBM PC AT 5170&lt;/ins&gt;. &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;It is the &lt;/ins&gt;edition &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;to use for any AT built after early 1985: it covers &#039;&#039;&#039;&lt;/ins&gt;all&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039; planar &lt;/ins&gt;types&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;including the &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;&lt;/ins&gt;Type 2&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039; board, &lt;/ins&gt;and the 06/10/85 BIOS.&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; 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;Source&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;: &lt;/del&gt;Ardent Tool of Capitalism (ardent-tool.com) &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;/ &lt;/del&gt;ps-2.kev009.com &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;/ &lt;/del&gt;Internet Archive.&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;PDF:&#039;&#039;&#039; 500 pages.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;&lt;/ins&gt;Source&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;.&#039;&#039;&#039; The exact provenance of this upload was not recorded at the time. Documents of this kind on this wiki come from the mirrors where the IBM PC and PS/2 technical library survives &amp;amp;mdash; the &lt;/ins&gt;Ardent Tool of Capitalism (ardent-tool.com)&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;ps-2.kev009.com&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, minuszerodegrees.net and the &lt;/ins&gt;Internet Archive. &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;The file has been checked against the printed document&#039;s own title page, part number and edition notice, which are quoted above; those, not the filename, are what identifies it.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;Licence: not free.&#039;&#039;&#039; This is IBM service and technical documentation. IBM never released it under a free or open licence, and copyright remains with International Business Machines Corporation (or, for the later ThinkPad volumes, with Lenovo). It is hosted here for preservation and for repair reference on obsolete equipment, on the same basis as the rest of this wiki&#039;s manual collection. It is &#039;&#039;&#039;not&#039;&#039;&#039; public domain, and it is &#039;&#039;&#039;not&#039;&#039;&#039; licensed for redistribution &amp;amp;mdash; if you need a copy for commercial use, that is a matter between you and the rights holder.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&#039;&#039;&#039;Described in full at:&#039;&#039;&#039; [[IBM PC AT 5170 Technical Reference (September 1985)]]&lt;/ins&gt;&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:IBM Service Manuals]]&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:IBM Service Manuals]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Category:Service Manuals]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Josh</name></author>
	</entry>
	<entry>
		<id>https://wiki.retrotechcollection.com/index.php?title=File:IBM_PC_AT_5170_Technical_Reference_Sep85.pdf&amp;diff=10657&amp;oldid=prev</id>
		<title>Josh: Upload of IBM PC AT 5170 Technical Reference (September 1985)</title>
		<link rel="alternate" type="text/html" href="https://wiki.retrotechcollection.com/index.php?title=File:IBM_PC_AT_5170_Technical_Reference_Sep85.pdf&amp;diff=10657&amp;oldid=prev"/>
		<updated>2026-05-22T08:48:23Z</updated>

		<summary type="html">&lt;p&gt;Upload of IBM PC AT 5170 Technical Reference (September 1985)&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Official IBM Personal Computer AT (5170) Technical Reference. Updated edition covering all motherboard types including the Type 2 (Baby AT) and the 06/10/85 BIOS revision. IBM part number 6280070, September 1985.&lt;br /&gt;
&lt;br /&gt;
Source: Ardent Tool of Capitalism (ardent-tool.com) / ps-2.kev009.com / Internet Archive.&lt;br /&gt;
&lt;br /&gt;
[[Category:IBM Service Manuals]]&lt;/div&gt;</summary>
		<author><name>Josh</name></author>
	</entry>
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