UNIBUS backplanes

From Computer History Wiki
Revision as of 00:41, 28 January 2021 by Jnc (talk | contribs) (pretty complete)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

UNIBUS backplanes from DEC, the DD11 backplanes, were system units which were normally installed in a BA11 mounting box. (Some CPU and device backplanes also had UNIBUS slots.)

They came in several different generations: the earliest ones provided only quad Small Peripheral Controller slots; later ones also provided hex Modified UNIBUS Device slots (along with two SPC slots, in the end slots, where the UNIBUS entered and left the backplane).

The earliest one, the DD11-A (used in the PDP-11/20) got its power through a paddle card which plugged into the 3A slot/connector. All the later ones used one or more standard DEC power distribution connectors.

Other manufacturers, including Plessey, also produced UNIBUS backplanes.

They were: