Difference between revisions of "KM11-A Maintenance Set"

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(Replicas: Add them)
(Overlays: FP11-C, too)
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* [[KA11 CPU|KA11]]
 
* [[KA11 CPU|KA11]]
 
* [[KB11]] - all models
 
* [[KB11]] - all models
** [[FP11-B]] (same inlay as CPU)
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** [[FP11-B Floating-Point Processor|FP11-B]]/[[FP11-C Floating-Point Processor|FP11-C]] (same inlay as CPU)
 
* [[KD11-A CPU|KD11-A]]
 
* [[KD11-A CPU|KD11-A]]
 
** [[KT11-D Memory Management|KT11-D]], [[KE11-E Extended Instruction Set|KE11-E]]/[[KE11-F Floating Instruction Set|KE11-F]]
 
** [[KT11-D Memory Management|KT11-D]], [[KE11-E Extended Instruction Set|KE11-E]]/[[KE11-F Floating Instruction Set|KE11-F]]

Revision as of 21:10, 21 February 2019

The KM11-A Maintenance Set (also variously called the KM11-A Maintenance Panel, KM11-A Maintenance Console and KM11-A Maintenance Cards in some later DEC manuals) is a device used to perform maintenance activities on early PDP-11 CPUs and some early PDP-11 peripherals.

As produced by DEC, a KM11 consists of a W131 Maintenance Indicator Module plugged into a W130 Maintenance Connector Module; later a W131 and a W133 Driver Module. The W131 contains an array of 28 lights, three double-throw switches, and a single spring-loaded double-throw switch.

Overlays

A variety of overlays, specific to a CPU or peripheral, indicate the meaning of the lights, and the function of the switches, when used with that CPU or peripheral.

The CPUs which can use the KM11-A, and for which overays exist, are:

Devices which support the KM11-A, and for which overays exist, are:

Replicas

The original DEC KM11-A's are incredibly scarce, but they are also a very powerful diagnostic tool. So, there have been several different projects to produce replicas; see the links below.

Externl links