(TXT) View Source
       
       # 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                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        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.                       |
          +------------------------------------------------------------+