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       # DECISION COMPUTER INTERNATIONAL CO., LTD.
       
          PCCOM 8-PORT EXTERNAL RS-232 RISC, PCCOM 8-PORT EXTERNAL
          RS-422 RISC
       
          Card Type         Serial                                       
          Chipset           Cirrus Logic CL-CD1400                       
          I/O Options       Serial ports (8), interrupt daisy chain      
          Data Bus          16-bit ISA                                   
          Card Size         Full height, half length                     
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Function        | Label  |     Function      | Label |
          |-----------------------+--------+-------------------+-------|
          | RS-232 or RS-422      |  IO1   | Interrupt         |  JP3  |
          | serial ports via      |        | daisy-chain in    |       |
          | unidentified          |        |                   |       |
          | connector             |        |                   |       |
          |-----------------------+--------+-------------------+-------|
          | Interrupt daisy-chain |  JP2   |                   |       |
          | out                   |        |                   |       |
          |------------------------------------------------------------|
          |      Note:Standard DB-25 serial ports are provided on an   |
          |      included external expansion box.                      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Setting                | Label  |  Position  |
          |--------------------------------------+--------+------------|
          | »   | Board is interrupt master      |  JP1   |   Closed   |
          |-----+--------------------------------+--------+------------|
          |     | Board is interrupt slave       |  JP1   |    Open    |
          |-----+--------------------------------+--------+------------|
          | »   | Interrupt enabled              |  JP4   |   Closed   |
          |-----+--------------------------------+--------+------------|
          |     | Interrupt disabled             |  JP4   |    Open    |
          |------------------------------------------------------------|
          |      Note:When interrupt sharing is used, all boards       |
          |      should be set to interrupt enabled. When              |
          |      daisy-chaining is used, only the first board in the   |
          |      chain should be set to interrupt enabled.             |
          +------------------------------------------------------------+
       
          +-------------------------------------------------------------+
          |                     INTERRUPT SELECTION                     |
          |-------------------------------------------------------------|
          |Setting|SW1/1|SW1/2|SW1/3|SW1/4|SW1/5|SW1/6|SW1/7|SW1/8|SW1/9|
          |-------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |   3   | On  | Off | Off | Off | Off | Off | Off | Off | Off |
          |-------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |   4   | Off | On  | Off | Off | Off | Off | Off | Off | Off |
          |-------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |   5   | Off | Off | On  | Off | Off | Off | Off | Off | Off |
          |-------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |   6   | Off | Off | Off | On  | Off | Off | Off | Off | Off |
          |-------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |   7   | Off | Off | Off | Off | On  | Off | Off | Off | Off |
          |-------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |  10   | Off | Off | Off | Off | Off | On  | Off | Off | Off |
          |-------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |  11   | Off | Off | Off | Off | Off | Off | On  | Off | Off |
          |-------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |  12   | Off | Off | Off | Off | Off | Off | Off | On  | Off |
          |-------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |  15   | Off | Off | Off | Off | Off | Off | Off | Off | On  |
          +-------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SHARED MEMORY ADDRESS SELECTION               |
          |------------------------------------------------------------|
          | Setting | SW1/1  | SW1/2  | SW1/3  | SW1/4 | SW1/5 | SW1/6 |
          |---------+--------+--------+--------+-------+-------+-------|
          | 80000h  |   On   |   On   |   On   |  On   |  On   |  On   |
          |---------+--------+--------+--------+-------+-------+-------|
          | 82000h  |  Off   |   On   |   On   |  On   |  On   |  On   |
          |---------+--------+--------+--------+-------+-------+-------|
          | 84000h  |   On   |  Off   |   On   |  On   |  On   |  On   |
          |---------+--------+--------+--------+-------+-------+-------|
          | 86000h  |  Off   |  Off   |   On   |  On   |  On   |  On   |
          |---------+--------+--------+--------+-------+-------+-------|
          | 88000h  |   On   |   On   |  Off   |  On   |  On   |  On   |
          |---------+--------+--------+--------+-------+-------+-------|
          | F6000h  |  Off   |  Off   |   On   |  Off  |  Off  |  Off  |
          |---------+--------+--------+--------+-------+-------+-------|
          | F8000h  |   On   |   On   |  Off   |  Off  |  Off  |  Off  |
          |---------+--------+--------+--------+-------+-------+-------|
          | FA000h  |  Off   |   On   |  Off   |  Off  |  Off  |  Off  |
          |---------+--------+--------+--------+-------+-------+-------|
          | FC000h  |   On   |  Off   |  Off   |  Off  |  Off  |  Off  |
          |---------+--------+--------+--------+-------+-------+-------|
          | FE000h  |  Off   |  Off   |  Off   |  Off  |  Off  |  Off  |
          |------------------------------------------------------------|
          |      Note: A total of 64 base address settings are         |
          |      available. The switches are a binary representation   |
          |      of the decimal memory addresses. SW1/6 is the Most    |
          |      Significant Bit and switch SW1/1 is the Least         |
          |      Significant Bit. The switches have the following      |
          |      decimal values: SW1/6=262,144, SW1/5=131,072,         |
          |      SW1/4=65,536, SW1/3=32,768, SW1/2=16,384,             |
          |      SW1/1=8,192. Turn off the switches and add the values |
          |      of the switches that are off to 524,288 to obtain the |
          |      correct memory address. (Off=1, On=0)                 |
          +------------------------------------------------------------+