BA11 mounting boxes: Difference between revisions
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The '''BA11''' is the name for a series of [[DEC card form factor|hex]] [[system unit]] [[backplane]] mounting | The '''BA11''' is the name for a series of [[DEC card form factor|hex]] [[system unit]] [[backplane]] [[mounting box]]es for the [[H960 rack|H960]] series of 19"-wide racks produced by [[Digital Equipment Corporation|DEC]]. Although they were intended to principally be rack-mounted, many were available in table-top configuration as well. | ||
The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further | The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further sub-dividable into a pair of 5-1/4" spaces. The BA11 mounting boxes were designed for these spaces. | ||
They included: | They included: | ||
* [[BA11 Mounting Box|BA11]] - the first, used in the [[PDP-11/20]] | * [[BA11 Mounting Box|BA11]] - the first, used in the [[PDP-11/20]] | ||
* [[BA11-A mounting box|BA11-A]] - a late unit, used for the [[PDP-11/44]] | * [[BA11-A mounting box|BA11-A]] - the terminal letter notwithstanding, a late unit, used for the [[PDP-11/44]] | ||
* [[BA11-D mounting box|BA11-D]] - used for the [[PDP-11/05]] | * [[BA11-D mounting box|BA11-D]] - used for the [[PDP-11/05]] | ||
* [[BA11-F Mounting Box|BA11-F]] - used in the larger -11's like the [[PDP-11/45]] | * [[BA11-F Mounting Box|BA11-F]] - used in the larger -11's like the [[PDP-11/45]] | ||
* [[BA11-K mounting box|BA11-K]] - used to hold both [[Central Processing Unit|CPUs]] as well as | * [[BA11-K mounting box|BA11-K]] - used to hold both [[Central Processing Unit|CPUs]] as well as [[device controller]]s | ||
* [[BA11-L mounting box|BA11-L]] - ditto | * [[BA11-L mounting box|BA11-L]] - ditto | ||
Revision as of 13:41, 20 August 2018
The BA11 is the name for a series of hex system unit backplane mounting boxes for the H960 series of 19"-wide racks produced by DEC. Although they were intended to principally be rack-mounted, many were available in table-top configuration as well.
The H960 racks provided 63" of vertical mounting space, divided into units of 10-1/2", which were further sub-dividable into a pair of 5-1/4" spaces. The BA11 mounting boxes were designed for these spaces.
They included:
- BA11 - the first, used in the PDP-11/20
- BA11-A - the terminal letter notwithstanding, a late unit, used for the PDP-11/44
- BA11-D - used for the PDP-11/05
- BA11-F - used in the larger -11's like the PDP-11/45
- BA11-K - used to hold both CPUs as well as device controllers
- BA11-L - ditto
The -F was a 21" box, and the -L a 5-1/4"; the rest were all 10-1/2".
There were also several boxes in the BA11 series which held quad QBUS backplanes:
These were all 5-1/4" high.
