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

   MULTIPORT I/O CARD

   Card Type          Multi-I/O                                   
   Chipset/Controller Unidentified                                
   I/O Options        Parallel, serial I/O via DB-37 port         
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/U-Z/50805-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |              Purpose               |       Location        |
   |------------------------------------+-----------------------|
   | Parallel and serial I/O DB-37 port |          CN1          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    SERIAL RECEIVE CLOCK                    |
   |------------------------------------------------------------|
   |          >> Setting           |             J10             |
   |------------------------------+-----------------------------|
   |>> |      External clock      |      Pins 2 & 3 closed      |
   |---+--------------------------+-----------------------------|
   |>> |      Internal clock      |      Pins 1 & 2 closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   SERIAL TRANSMIT CLOCK                    |
   |------------------------------------------------------------|
   |          >> Setting           |             J11             |
   |------------------------------+-----------------------------|
   |>> |      External clock      |      Pins 1 & 2 closed      |
   |---+--------------------------+-----------------------------|
   |>> |      Internal clock      |      Pins 2 & 3 closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | The DB-37 port is designed to connect to a "breakout box"  |
   |  consisting of two DB-25 external connectors for parallel  |
   |                      and serial I/O.                       |
   +------------------------------------------------------------+