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ldkraemer
April 16th, 2014, 01:57 PM
I wanted to make a spare Kaypro II Keyboard cable, since my original coiled Cable was beginning to deteriorate.

The following information is located in the Kaypro II Manual.
J3 Pin 4 (Black) - Keyboard Serial Data Out (to Keyboard) TTL Levels
J3 Pin 3 (Red) - Ground
J3 Pin 2 (Yellow) - Keyboard Serial Data In (from Keyboard) TTL Levels
J3 Pin 1 (Green) - +5 VDC


I had purchased some RJ-22 Modular Plugs and a set of Crimpers from Fry's Electronics. I used my OHM
Meter to OHM out the Original Keyboard Cable as follows:

I oriented the RJ-22 Modular Plug with Brass Contacts UP, and Pin #1 is on the Left of RJ-22 Modular Plug.

J3 Pin 4 (Black) - Keyboard Serial Data Out (to Keyboard) TTL Levels...............BLACK WIRE.....
J3 Pin 3 (Red) - Ground............................................ ....................................RED WIRE.........
J3 Pin 2 (Yellow) - Keyboard Serial Data In (from Keyboard) TTL Levels..............YELLOW WIRE..
J3 Pin 1 (Green) - +5 VDC............................................... ...............................GREEN WIRE....

.................................................. .........................................Keyboard Serial Data in (from Motherboard) TTL Levels - KB Pin 1 (Black)
.................................................. .........................................Ground... .................................................. ................. - KB Pin 2 (Red)
.................................................. .........................................Keyboard Serial Data Out (to Motherboard) TTL Levels - KB Pin 3 (Yellow)
.................................................. .........................................+5 VDC............................................... ...................... - KB Pin 4 (Green)

Case Plug Pin 1 goes to Keyboard Plug Pin 4
Case Plug Pin 2 goes to Keyboard Plug Pin 3
Case Plug Pin 3 goes to Keyboard Plug Pin 2
Case Plug Pin 4 goes to Keyboard Plug Pin 1


Larry

cavelamb
May 22nd, 2014, 04:27 AM
I had several Kaypros (back in the day).

A telephone handset extension cable (the one between the phone and the handset) can be used for the Kaypro keyboard.
If you can still fine one.
I had a couple that were twelve feet long. Worked fine.