https://gunkies.org/index.php?action=history&feed=atom&title=H9276_backplane 2026-09-18T19:39:14Z Revision history for this page on the wiki MediaWiki 1.43.9 https://gunkies.org/w/index.php?title=H9276_backplane&diff=28282&oldid=prev 2022-12-06T11:50:49Z

<p>Better cat</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 11:50, 6 December 2022</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8">Line 8:</td> <td colspan="2" class="diff-lineno">Line 8:</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/qbus/MP01233_BA11-S_schem_Mar81.pdf BA11-S Field Maintenance Print Set] (MP-01233) - the H9276-B Field Maintenance Print Set (MP01243)is on pp. 51-59</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/qbus/MP01233_BA11-S_schem_Mar81.pdf BA11-S Field Maintenance Print Set] (MP-01233) - the H9276-B Field Maintenance Print Set (MP01243)is on pp. 51-59</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>[[Category: <del style="font-weight: bold; text-decoration: none;">DEC Hardware</del>]]</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>[[Category: <ins style="font-weight: bold; text-decoration: none;">QBUS Backplanes</ins>]]</div></td></tr> <!-- diff cache key mediawiki-wiki_:diff:1.41:old-26911:rev-28282:php=table --> </table>

Jnc https://gunkies.org/w/index.php?title=H9276_backplane&diff=26911&oldid=prev 2022-07-05T01:57:53Z

<p>Gives a place to hold the FMPS link</p> <p><b>New page</b></p><div>The &#039;&#039;&#039;H9276 backplane&#039;&#039;&#039; is a 9-slot [[QBUS#Backplanes|Q/CD]] [[backplane]], which could hold [[DEC card form factor|quad-sized]] cards. It was a [[QBUS#Variable_address_size|Q22]] backplane (the only significant difference from predecessor [[H9273 backplane]], which was Q18); it was the standard backplane in the [[BA11-S mounting box]].<br /> <br /> Since it was a Q/[[CD interconnect|CD]] backplane, dual-width [[QBUS]] cards could only be placed in the left-hand slots, and quad QBUS-only cards had to not use any pins on the [[DEC edge connector contact identification|right-hand C/D connectors]]. (The only DEC card with a problem with this seems to have been the [[MMV11-A QBUS core memory|MMV11-A]].)<br /> <br /> ==External links==<br /> <br /> * [http://www.bitsavers.org/pdf/dec/pdp11/1123/EK-23BMB-UG_001_1123B_MountingBox_Jan82.pdf PDP-11/23B Mounting Box User&#039;s Guide] (EK-23BMB-UG-001) - the H9276 is covered on pp. 12-13<br /> * [http://www.bitsavers.org/pdf/dec/qbus/MP01233_BA11-S_schem_Mar81.pdf BA11-S Field Maintenance Print Set] (MP-01233) - the H9276-B Field Maintenance Print Set (MP01243)is on pp. 51-59<br /> <br /> [[Category: DEC Hardware]]</div>

Jnc