Difference between revisions of "KM11-A Maintenance Set"

From Computer History Wiki
Jump to: navigation, search
(Overlays: Also a KE11-A overlay)
m (External links: +FMPS)
Line 33: Line 33:
 
==External links==
 
==External links==
  
 +
* [http://www.bitsavers.org/pdf/dec/pdp11/1140/PDP-1140_System_Engr_Drawings_Rev_P_Jun74.pdf PDP-11/40 system engineering drawings] - the KM11 is covered on pp. 123-125
 
* [http://www.psych.usyd.edu.au/pdp-11/maint_panel.html Maintenance Control Panel] - DEC's original
 
* [http://www.psych.usyd.edu.au/pdp-11/maint_panel.html Maintenance Control Panel] - DEC's original
 
* [http://www.shiresoft.com/products/km11/KM11%20Replica.html KM11 Replica] - Guy Sotomayor
 
* [http://www.shiresoft.com/products/km11/KM11%20Replica.html KM11 Replica] - Guy Sotomayor

Revision as of 21:27, 6 July 2022

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:

There is also reportedly an overlay for the KE11-A Extended Arithmetic Element‎, but although several KE11-A documents refer to it, no image of it can be found.

Replicas

A replica KM11 from Shiresoft

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.

External links