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-A mounting box|BA11-A]] - the terminal letter notwithstanding, a late unit, used for the [[PDP-11/44]] | ||
* [[BA11- | * BA11-B - mentioned briefly in some early documentation; the details of what it was are still unclear | ||
* [[BA11- | * [[BA11-C Mounting Box|BA11-C]] - the first, used in the [[PDP-11/20]] | ||
* [[BA11-F Mounting Box|BA11-F]] - used in the larger -11's like the [[PDP-11/45]] | * [[BA11-D Mounting Box|BA11-D]] - used for the [[PDP-11/05]] and early [[PDP-11/40]]'s | ||
* [[BA11-K mounting box|BA11-K]] - used to hold both [[Central Processing Unit|CPUs]] as well as | * [[BA11-E Mounting Box|BA11-E]] - expansion box, used with the early [[PDP-11]]s | ||
* [[BA11-F Mounting Box|BA11-F]] - used in the larger [[UNIBUS]] -11's like the [[PDP-11/45]] | |||
* [[BA11-K mounting box|BA11-K]] - used to hold both [[Central Processing Unit|CPUs]] as well as [[device controller]]s for UNIBUS -11's | |||
* [[BA11-L mounting box|BA11-L]] - ditto | * [[BA11-L mounting box|BA11-L]] - ditto | ||
* [[BA11-P card cage|BA11-P]] - used to hold the [[PDP-11/60]] | |||
* [[BA11-Z Mounting Box|BA11-Z]] - used to hold the [[VAX-11/730]] | |||
The -F was a 21" box, and the -L | The -F was a 21" box, and the -E and -L were 5-1/4"; the rest (other than the -P) were all 10-1/2". All of them other than the earliest -C and -E models provided the standard [[DEC power distribution connectors]]; the 9-[[pin]] version in the -D, and the 6/15 version in the others. | ||
There were also several boxes in the BA11 series which held [[DEC card form factor|quad]] [[QBUS]] backplanes: | There were also several boxes in the BA11 series which held [[DEC card form factor|quad]] [[QBUS]] backplanes: | ||
| Line 21: | Line 25: | ||
These were all 5-1/4" high. | These were all 5-1/4" high. | ||
==See also== | |||
* [[DEC mounting boxes]] | |||
[[Category: DEC Mounting Boxes]] | |||
Latest revision as of 01:06, 11 July 2023
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-A - the terminal letter notwithstanding, a late unit, used for the PDP-11/44
- BA11-B - mentioned briefly in some early documentation; the details of what it was are still unclear
- BA11-C - the first, used in the PDP-11/20
- BA11-D - used for the PDP-11/05 and early PDP-11/40's
- BA11-E - expansion box, used with the early PDP-11s
- BA11-F - used in the larger UNIBUS -11's like the PDP-11/45
- BA11-K - used to hold both CPUs as well as device controllers for UNIBUS -11's
- BA11-L - ditto
- BA11-P - used to hold the PDP-11/60
- BA11-Z - used to hold the VAX-11/730
The -F was a 21" box, and the -E and -L were 5-1/4"; the rest (other than the -P) were all 10-1/2". All of them other than the earliest -C and -E models provided the standard DEC power distribution connectors; the 9-pin version in the -D, and the 6/15 version in the others.
There were also several boxes in the BA11 series which held quad QBUS backplanes:
These were all 5-1/4" high.
