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       # DECISION COMPUTER INTERNATIONAL CO., LTD.
       
          PCCOM 8-BIT ISA 2-PORT RS422/485
       
          Card Type         Serial                                       
          Chipset           Unidentified                                 
          I/O Options       Serial ports (2)                             
          Data Bus          8-bit ISA                                    
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |                 Function                 |      Label      |
          |------------------------------------------+-----------------|
          | Serial ports via DB-37 port              |       CH1       |
          |------------------------------------------------------------|
          |      Note:Standard DB-25 serial ports are provided on an   |
          |      included adapter cable.                               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   SERIAL PORT ADDRESSES                    |
          |------------------------------------------------------------|
          |  Port 1 Address  | Port 2 Address |          JP7           |
          |------------------+----------------+------------------------|
          | » | 3F8h (COM1:) |  2F8h (COM2:)  |   Pins 1 & 3, 2 & 4    |
          |   |              |                |         closed         |
          |---+--------------+----------------+------------------------|
          |   | 3E8h (COM3:) |  2E8h (COM4:)  |   Pins 1 & 3 closed    |
          |---+--------------+----------------+------------------------|
          |   |     1A0h     |      1A8h      |   Pins 2 & 4 closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      PORT 1 INTERRUPT                      |
          |------------------------------------------------------------|
          | Setting  | JP5/A  | JP5/B  | JP5/C | JP5/D | JP5/E | JP5/F |
          |----------+--------+--------+-------+-------+-------+-------|
          |   | IRQ2 |  Open  |  Open  | Open  | Open  | Open  | Pins  |
          |   |      |        |        |       |       |       | 2 & 3 |
          |---+------+--------+--------+-------+-------+-------+-------|
          |   | IRQ3 |  Open  |  Open  | Open  | Open  | Pins  | Open  |
          |   |      |        |        |       |       | 2 & 3 |       |
          |---+------+--------+--------+-------+-------+-------+-------|
          | » | IRQ4 |  Open  |  Open  | Open  | Pins  | Open  | Open  |
          |   |      |        |        |       | 2 & 3 |       |       |
          |---+------+--------+--------+-------+-------+-------+-------|
          |   | IRQ5 |  Open  |  Open  | Pins  | Open  | Open  | Open  |
          |   |      |        |        | 2 & 3 |       |       |       |
          |---+------+--------+--------+-------+-------+-------+-------|
          |   | IRQ6 |  Open  | Pins 2 | Open  | Open  | Open  | Open  |
          |   |      |        |  & 3   |       |       |       |       |
          |---+------+--------+--------+-------+-------+-------+-------|
          |   | IRQ7 | Pins 2 |  Open  | Open  | Open  | Open  | Open  |
          |   |      |  & 3   |        |       |       |       |       |
          |------------------------------------------------------------|
          |      Note:Pins designated are in the closed position.      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      PORT 2 INTERRUPT                      |
          |------------------------------------------------------------|
          | Setting  | JP5/A  | JP5/B  | JP5/C | JP5/D | JP5/E | JP5/F |
          |----------+--------+--------+-------+-------+-------+-------|
          |   | IRQ2 |  Open  |  Open  | Open  | Open  | Open  | Pins  |
          |   |      |        |        |       |       |       | 1 & 2 |
          |---+------+--------+--------+-------+-------+-------+-------|
          | » | IRQ3 |  Open  |  Open  | Open  | Open  | Pins  | Open  |
          |   |      |        |        |       |       | 1 & 2 |       |
          |---+------+--------+--------+-------+-------+-------+-------|
          |   | IRQ4 |  Open  |  Open  | Open  | Pins  | Open  | Open  |
          |   |      |        |        |       | 1 & 2 |       |       |
          |---+------+--------+--------+-------+-------+-------+-------|
          |   | IRQ5 |  Open  |  Open  | Pins  | Open  | Open  | Open  |
          |   |      |        |        | 1 & 2 |       |       |       |
          |---+------+--------+--------+-------+-------+-------+-------|
          |   | IRQ6 |  Open  | Pins 1 | Open  | Open  | Open  | Open  |
          |   |      |        |  & 2   |       |       |       |       |
          |---+------+--------+--------+-------+-------+-------+-------|
          |   | IRQ7 | Pins 1 |  Open  | Open  | Open  | Open  | Open  |
          |   |      |  & 2   |        |       |       |       |       |
          |------------------------------------------------------------|
          |      Note:Pins designated are in the closed position.      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   PORT 1 TRANSMIT DRIVER                   |
          |------------------------------------------------------------|
          |             Setting             | JP1/A  | JP1/B  | JP1/C  |
          |---------------------------------+--------+--------+--------|
          |            Always on            | Closed |  Open  |  Open  |
          |---------------------------------+--------+--------+--------|
          |       Follows RTS signal        |  Open  | Closed |  Open  |
          |---------------------------------+--------+--------+--------|
          |    Follows bit 0 of control     |  Open  |  Open  | Closed |
          |            register             |        |        |        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   PORT 2 TRANSMIT DRIVER                   |
          |------------------------------------------------------------|
          |             Setting             | JP2/A  | JP2/B  | JP2/C  |
          |---------------------------------+--------+--------+--------|
          |            Always on            | Closed |  Open  |  Open  |
          |---------------------------------+--------+--------+--------|
          |       Follows RTS signal        |  Open  | Closed |  Open  |
          |---------------------------------+--------+--------+--------|
          |    Follows bit 0 of control     |  Open  |  Open  | Closed |
          |            register             |        |        |        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   PORT 1 RECEIVE DRIVER                    |
          |------------------------------------------------------------|
          |              Setting              |          JP3           |
          |-----------------------------------+------------------------|
          |             Always on             |   Pins 1 & 3 closed    |
          |-----------------------------------+------------------------|
          | Follows bit 1 of control register |   Pins 2 & 4 closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   PORT 2 RECEIVE DRIVER                    |
          |------------------------------------------------------------|
          |              Setting              |          JP4           |
          |-----------------------------------+------------------------|
          |             Always on             |   Pins 1 & 3 closed    |
          |-----------------------------------+------------------------|
          | Follows bit 1 of control register |   Pins 2 & 4 closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        WAIT STATES                         |
          |------------------------------------------------------------|
          | Setting  |  JP6/A  |  JP6/B  |  JP6/C  |  JP6/D  |  JP6/E  |
          |----------+---------+---------+---------+---------+---------|
          |    0     | Closed  |  Open   |  Open   |  Open   |  Open   |
          |----------+---------+---------+---------+---------+---------|
          |    1     |  Open   | Closed  |  Open   |  Open   |  Open   |
          |----------+---------+---------+---------+---------+---------|
          |    2     |  Open   |  Open   | Closed  |  Open   |  Open   |
          |----------+---------+---------+---------+---------+---------|
          |    3     |  Open   |  Open   |  Open   | Closed  |  Open   |
          |----------+---------+---------+---------+---------+---------|
          |    4     |  Open   |  Open   |  Open   |  Open   | Closed  |
          +------------------------------------------------------------+