https://gunkies.org/index.php?action=history&feed=atom&title=H9270_backplane 2026-11-08T09:24:06Z Revision history for this page on the wiki MediaWiki 1.43.11 https://gunkies.org/w/index.php?title=H9270_backplane&diff=37531&oldid=prev 2026-10-09T16:18:03Z

<p><span class="autocomment">External links: </span> Bitsavers has reorganized a bit</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:18, 9 October 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l7">Line 7:</td> <td colspan="2" class="diff-lineno">Line 7:</td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>==External links==</div></td><td class="diff-marker"></td><td style="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;"><div>==External links==</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><br></td><td class="diff-marker"></td><td style="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;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/qbus/<del style="font-weight: bold; text-decoration: none;">Digital_Microcomputer_Interfaces_Handbook_1980</del>.pdf microcomputer interfaces handbook] - the H9270 is covered on pp. 425-430 (pp. 433-438 of the PDF)</div></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/qbus/<ins style="font-weight: bold; text-decoration: none;">EB-20175-20_Digital_Microcomputer_Interfaces_Handbook_1980</ins>.pdf microcomputer interfaces handbook] - the H9270 is covered on pp. 425-430 (pp. 433-438 of the PDF)</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/qbus/<del style="font-weight: bold; text-decoration: none;">Digital_Microcomputer_Products_Handbook_1985</del>.pdf Microcomputer Products Handbook] - the H9270-Q is covered in Chapter 59 (pp. 555-560 of the PDF)</div></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/qbus/<ins style="font-weight: bold; text-decoration: none;">EB-26078-41_Digital_Microcomputer_Products_Handbook_1985</ins>.pdf Microcomputer Products Handbook] - the H9270-Q is covered in Chapter 59 (pp. 555-560 of the PDF)</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user&#039;s manual] (EK-LSI11-TM-002) - the H9270 is covered in Section 11.7 (pp. 131-134 of the PDF)</div></td><td class="diff-marker"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user&#039;s manual] (EK-LSI11-TM-002) - the H9270 is covered in Section 11.7 (pp. 131-134 of the PDF)</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/pdp11/1103/1103_Schematics.pdf PDP-11/03 Engineering Drawings] - the H9270 is covered on pp. 147-153 of the PDF</div></td><td class="diff-marker"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/pdp11/1103/1103_Schematics.pdf PDP-11/03 Engineering Drawings] - the H9270 is covered on pp. 147-153 of the PDF</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/qbus/EK-BA11N-UG-001_BA11-N_Mounting_Box_Users_Guide_Jan78.pdf BA11-N mounting box user's guide] (EK-BA11N-UG-001) - the H9270 is covered on pp. 10-11</div></td><td class="diff-marker" data-marker="+"></td><td style="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;"><div>* [http://www.bitsavers.org/pdf/dec/qbus<ins style="font-weight: bold; text-decoration: none;">/BA11-N</ins>/EK-BA11N-UG-001_BA11-N_Mounting_Box_Users_Guide_Jan78.pdf BA11-N mounting box user's guide] (EK-BA11N-UG-001) - the H9270 is covered on pp. 10-11</div></td></tr> <tr><td class="diff-marker"></td><td style="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;"><br></td><td class="diff-marker"></td><td style="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;"><br></td></tr> <tr><td class="diff-marker"></td><td style="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;"><div>[[Category: QBUS Backplanes]]</div></td><td class="diff-marker"></td><td style="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;"><div>[[Category: QBUS Backplanes]]</div></td></tr> <!-- diff cache key mediawiki-wiki_:diff:1.41:old-30321:rev-37531:php=table --> </table>

Jnc https://gunkies.org/w/index.php?title=H9270_backplane&diff=30321&oldid=prev 2023-07-08T06:03:14Z

<p>Stubby; mostly here as a repository for ext links</p> <p><b>New page</b></p><div>The &#039;&#039;&#039;H9270 backplane&#039;&#039;&#039; is a 4-slot [[QBUS#Backplanes|Q/Q]] [[QBUS]] [[backplane]], the standard backplane in the [[BA11-M mounting box]]. It could hold [[DEC card form factor|quad-sized]] cards.<br /> <br /> It was a [[QBUS#Variable_address_size|Q18]] backplane, but it is relatively easy to [[upgrading QBUS backplanes|upgrade it to Q22]]. A later variant, the H9270-Q, has [[jumper]]s which allow it to be configured for Q22 operation.<br /> <br /> {{semi-stub}}<br /> <br /> ==External links==<br /> <br /> * [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Interfaces_Handbook_1980.pdf microcomputer interfaces handbook] - the H9270 is covered on pp. 425-430 (pp. 433-438 of the PDF)<br /> * [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Products_Handbook_1985.pdf Microcomputer Products Handbook] - the H9270-Q is covered in Chapter 59 (pp. 555-560 of the PDF)<br /> * [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user&#039;s manual] (EK-LSI11-TM-002) - the H9270 is covered in Section 11.7 (pp. 131-134 of the PDF)<br /> * [http://www.bitsavers.org/pdf/dec/pdp11/1103/1103_Schematics.pdf PDP-11/03 Engineering Drawings] - the H9270 is covered on pp. 147-153 of the PDF<br /> * [http://www.bitsavers.org/pdf/dec/qbus/EK-BA11N-UG-001_BA11-N_Mounting_Box_Users_Guide_Jan78.pdf BA11-N mounting box user&#039;s guide] (EK-BA11N-UG-001) - the H9270 is covered on pp. 10-11<br /> <br /> [[Category: QBUS Backplanes]]</div>

Jnc