https://gunkies.org/index.php?action=history&feed=atom&title=DD11-A_backplane 2026-05-12T11:56:48Z Revision history for this page on the wiki MediaWiki 1.30.1 https://gunkies.org/w/index.php?title=DD11-A_backplane&diff=29118&oldid=prev 2023-03-27T11:20:39Z

<p>Finally create this one</p> <p><b>New page</b></p><div>The '''DD11-A backplane''' is a 4-slot [[UNIBUS]] [[backplane]] [[system unit]]; it provided 4 [[Small Peripheral Controller]] slots. It was normally installed in a [[BA11-C Mounting Box|BA11-C]] or [[BA11-E Mounting Box|BA11-E]] mounting box.<br /> <br /> It was supplied with power, not by a [[power harness]] connected to the back of the backplane, as all later [[DD11 backplanes]] did, but through a paddle card which plugged into the [[DEC edge connector contact identification|3A slot/connector]]; the paddle card was wired to a power harness which ran longitudinally within the BA11.<br /> <br /> DD11-A's were mounted crosswise within the BA11, unlike all later DD11's, which were mounted longitudinally. This made them unable to hold [[DEC card form factor|hex]] cards, since such cards would have intruded into the space used to hold the cooling fans which ran down the wide of the BA11.<br /> &lt;!--<br /> The two [[DEC card form factor|hex-width]] slots were wired to support a [[DF11 Communications Line Adapter]] (in the A-B [[DEC edge connector contact identification|connectors]]) along with a quad-width [[serial line]] [[device controller|interface]], such as the [[DL11 asynchronous serial line interface|DL11]] or the [[DU11 synchronous serial line interface|DU11]].<br /> --&gt;<br /> ==External links==<br /> <br /> * [http://www.bitsavers.org/pdf/dec/unibus/DB11-A_RevS_Engineering_Drawings_Jan76.pdf DD11-A Engineering Drawings]<br /> <br /> [[Category: UNIBUS Backplanes]]]</div>

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