ZENITH DATA SYSTEMS
===================

   Z-286LP

   Processor           80286                                      
   Processor Speed     8MHz                                       
   Chip Set            Unidentified                               
   Video Chip Set      None                                       
   Maximum Onboard     6MB                                        
   Memory              
   Maximum Video       None                                       
   Memory              
   Cache               None                                       
   BIOS                Unidentified                               
   Dimensions          330mm x 218mm                              
   I/O Options         Parallel port, serial ports (2), riser     
                       slot                                       
   NPU Options         80287                                      

<gopher://bitreich.org/I/th99/m/U-Z/34128-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Parallel port     |   CN1    | Serial port 1    |   CN3    |
   |-------------------+----------+------------------+----------|
   | Serial port 2     |   CN2    | Riser slot       |   SL1    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               |   Label   | Position |
   |-------------------------------------+-----------+----------|
   |>> | Factory configured - do not     | J504/pins |  Closed  |
   |   | alter (1 I/O card installed)    |   1 & 2   |          |
   |---+---------------------------------+-----------+----------|
   |>> | Factory configured - do not     | J504/pins |  Closed  |
   |   | alter (IBM printer              |  9 & 10   |          |
   |   | compatibility)                  |           |          |
   |---+---------------------------------+-----------+----------|
   |   | Monitor type select color       | J510/pins |  Closed  |
   |   |                                 |   1 & 2   |          |
   |---+---------------------------------+-----------+----------|
   |   | Monitor type select monochrome  | J510/pins |   Open   |
   |   |                                 |   1 & 2   |          |
   |---+---------------------------------+-----------+----------|
   |>> | Factory configured - do not     | J510/pins |  Closed  |
   |   | alter (SCP enabled)             |   3 & 4   |          |
   |---+---------------------------------+-----------+----------|
   |>> | Factory configured - do not     | J510/pins |  Closed  |
   |   | alter (NPU duty cycle)          |  9 & 10   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
   |------------+---------------+---------------+---------------|
   |    1MB     | (2) 256K x 9  | (2) 256K x 9  |     None      |
   |------------+---------------+---------------+---------------|
   |    2MB     |  (2) 1M x 9   |  (2) 1M x 9   |     None      |
   |------------+---------------+---------------+---------------|
   |    3MB     | (2) 256K x 9  | (2) 256K x 9  |  (2) 1M x 9   |
   |------------+---------------+---------------+---------------|
   |    6MB     |  (2) 1M x 9   |  (2) 1M x 9   |  (2) 1M x 9   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   |            Size            |             J516              |
   |----------------------------+-------------------------------|
   |            1MB             |       Pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |            2MB             |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |            3MB             |       Pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |            6MB             |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    NPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   |      Speed       |     Oscillator     |        J505        |
   |------------------+--------------------+--------------------|
   |       5MHz       |       16MHz        | Pins 7 & 8 closed  |
   |------------------+--------------------+--------------------|
   |       5MHz       |       14MHz        | Pins 9 & 10 closed |
   |------------------+--------------------+--------------------|
   |       8MHz       |       24MHz        | Pins 5 & 6 closed  |
   |------------------+--------------------+--------------------|
   |       8MHz       |       16MHz        | Pins 7 & 8 closed  |
   |------------------+--------------------+--------------------|
   |      10MHz       |       30MHz        | Pins 3 & 4 closed  |
   |------------------+--------------------+--------------------|
   |      10MHz       |       20MHz        | Pins 3 & 4 closed  |
   |------------------+--------------------+--------------------|
   |      10MHz       |       24MHz        | Pins 5 & 6 closed  |
   |------------------+--------------------+--------------------|
   |      12MHz       |       24MHz        | Pins 5 & 6 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  PARALLEL PORT SELECTION                   |
   |------------------------------------------------------------|
   |  Setting   | J501  | J502  | J503  | J506  | J511  | J512  |
   |------------+-------+-------+-------+-------+-------+-------|
   |  Parallel  | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
   |    port    |       |       |       |       |       |       |
   |------------+-------+-------+-------+-------+-------+-------|
   |    Page    | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
   |  scanner   |       |       |       |       |       |       |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     KEYBOARD SELECTION                     |
   |------------------------------------------------------------|
   |     Setting      |  J510/pins 5 & 6   |  J510/pins 7 & 8   |
   |------------------+--------------------+--------------------|
   |        XT        |       Closed       |        N/A         |
   |------------------+--------------------+--------------------|
   |        AT        |        N/A         |        Open        |
   +------------------------------------------------------------+