TransKey Modification #1










From: Michael Current (aa700@cleveland.Freenet.Edu)

Date: 10/29/92-02:59:35 PM Z









From: aa700@cleveland.Freenet.Edu (Michael Current)
Subject: TransKey Modification #1
Date: Thu Oct 29 14:59:35 1992




   From:  Chuck Steinman
          DataQue Products
          Post Office Box 134
          Ontario, OH  44862
          USA

   To:    All Current TransKey Owners
  
   Re:    Stock Keyboard Non-Functionality

   Date:  August 1, 1992



   If you are using a TransKey in your system, and the original Atari
   keyboard has some are all of the keys which either fail to work at
   all, or are inconsistant, this modification should correct that
   problem.

   SOLDER-IN VERSIONS:

   Disconnect the TransKey ribbon conductor which is attached to pin-25
   of PoKey.  Attach one end of a 1K Ohm, 1/4 Watt resistor to pin-25
   of PoKey.  Attach the other end of the resistor to the wire which
   was just disconnected.

   PLUG-IN VERSIONS:

   You will need to break the third from last conductor in the ribbon
   cable (see diagram below).  This should be done about two inches away
   from the PoKey adapter socket.  Insert a 1K Ohm, 1/4 Watt resistor
   between the wire just broken. 

   The easiest way to break this conductor loose is to use a knife and
   cut the thin part of the insulation (between conductors) for about
   an inch, then when it is isolated, break it about in the middle.

   TOP VIEW DIP PLUG (TK END)

    ---\/---
   | 1    14|------------------------------------
   |        |------------------------------------
   | 2    13|------------------------------------
   |        |------------------------------------
   |        |------------------------------------
   | 3    12|------------------------------------
   |        |------------------------------------
   | 4    11|-------------\/\/\/\/--------------- to pin-25 of PoKey
   |        |------------------------------------
   | 5    10|------------------------------------
   |        |----------
   | 6     9|----------  Last 4 Unused
   |        |----------
   | 7     8|----------
    --------



   thanks
      Chuck

-- 
         Michael Current, Cleveland Free-Net 8-bit Atari SIGOp
Carleton College, Northfield, MN, USA / UUCP: ...!umn-cs!ccnfld!currentm
      Internet: currentm@carleton.edu / Cleveland Free-Net: aa700









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