Difference between revisions of "KM11-A Maintenance Set"

From Computer History Wiki
Jump to: navigation, search
(Replicas: Add image of Shiresoft replica)
(Overlays: Also a KE11-A overlay)
(2 intermediate revisions by the same user not shown)
Line 21: Line 21:
 
* [[RK11 disk controller#RK11-D|RK11-D]]
 
* [[RK11 disk controller#RK11-D|RK11-D]]
 
* [[TM11 magtape controller|TM11]]
 
* [[TM11 magtape controller|TM11]]
* [[RX0x floppy drive|RX01]]
+
* [[RX01/02 floppy drive|RX01]]
 +
 
 +
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==
 
==Replicas==
Line 29: Line 31:
 
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.
 
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==
+
==External links==
  
 
* [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
Line 35: Line 37:
 
* [http://www.ubanproductions.com/museum.html Replacement KM11 maintenance board] - Tom Uban
 
* [http://www.ubanproductions.com/museum.html Replacement KM11 maintenance board] - Tom Uban
 
* [http://www.ubanproductions.com/km11x.html How to build a clone of the DEC KM11 maintenance module] - by Tony Duell
 
* [http://www.ubanproductions.com/km11x.html How to build a clone of the DEC KM11 maintenance module] - by Tony Duell
 +
* [http://retrocmp.com/tools/dec-km11-maintenance-panel DEC KM11] - Jörg Hoppe
  
 
[[Category: PDP-11s]]
 
[[Category: PDP-11s]]

Revision as of 23:34, 18 October 2021

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