DECISION COMPUTER INTERNATIONAL CO., LTD.
=========================================

   PCCOM 8-BIT ISA 4-PORT RS-232

   Card Type         Serial                                       
   Chipset           Unidentified                                 
   I/O Options       Serial ports (4 RS-232)                      
   Data Bus          8-bit ISA                                    

<gopher://bitreich.org/I/th99/i/C-D/52580-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |               Function                |       Label        |
   |---------------------------------------+--------------------|
   | Serial ports via DB-37 connector      |         J          |
   |------------------------------------------------------------|
   |      Note:Standard DB-25 serial ports are provided on an   |
   |      included adapter cable.                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Setting              | Label |    Position    |
   |-----------------------------------+-------+----------------|
   |>> | Bus speed is less than 16MHz  |  JP1  |   Pins 1 & 3   |
   |   |                               |       |     closed     |
   |---+-------------------------------+-------+----------------|
   |   | Bus speed is 16MHz or greater |  JP1  |   Pins 2 & 4   |
   |   |                               |       |     closed     |
   |---+-------------------------------+-------+----------------|
   |>> | Normal operation              |  JP3  |   Pins 1 & 2   |
   |   |                               |       |     closed     |
   |---+-------------------------------+-------+----------------|
   |   | PC-MOS/386 mode               |  JP3  |   Pins 2 & 3   |
   |   |                               |       |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT ADDRESSES/INTERRUPTS              |
   |------------------------------------------------------------|
   | Option |  Port 1  | IRQ |  Port 2  | IRQ | Port 3 | Port 4 |
   |--------+----------+-----+----------+-----+--------+--------|
   |    | 1 |   3F8h   |  4  |   2F8h   |  3  |  1B0h  |  1B8h  |
   |    |   | (COM1:)  |     | (COM2:)  |     |        |        |
   |----+---+----------+-----+----------+-----+--------+--------|
   |    | 2 |   3F8h   |  4  |   2F8h   |  3  |  2B0h  |  2B8h  |
   |    |   | (COM1:)  |     | (COM2:)  |     |        |        |
   |----+---+----------+-----+----------+-----+--------+--------|
   |>>  | 3 |   1A0h   | SW1 |   1A8h   | SW1 |  1B0h  |  1B8h  |
   |----+---+----------+-----+----------+-----+--------+--------|
   |    | 4 |   2A0h   | SW1 |   2A8h   | SW1 |  2B0h  |  2B8h  |
   |------------------------------------------------------------|
   |      Note:The interrupt for port 3 and port 4 is always    |
   |      set by SW1.                                           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          SERIAL PORT ADDRESSES/INTERRUPTS (CON'T)          |
   |------------------------------------------------------------|
   |  Option   |           JP2            |  SW1/7   |  SW1/8   |
   |-----------+--------------------------+----------+----------|
   |    |  1   | Pins 1 & 2, 3 & 4 closed |    On    |   Off    |
   |----+------+--------------------------+----------+----------|
   |    |  2   | Pins 1 & 2, 3 & 4 closed |    On    |    On    |
   |----+------+--------------------------+----------+----------|
   |>>  |  3   |           Open           |   Off    |   Off    |
   |----+------+--------------------------+----------+----------|
   |    |  4   |           Open           |   Off    |    On    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         INTERRUPT                          |
   |------------------------------------------------------------|
   | Setting | SW1/1  | SW1/2  | SW1/3  | SW1/4 | SW1/5 | SW1/6 |
   |---------+--------+--------+--------+-------+-------+-------|
   |  IRQ2   |   On   |  Off   |  Off   |  Off  |  Off  |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |  IRQ3   |  Off   |   On   |  Off   |  Off  |  Off  |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |  IRQ4   |  Off   |  Off   |   On   |  Off  |  Off  |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |  IRQ5   |  Off   |  Off   |  Off   |  On   |  Off  |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |  IRQ6   |  Off   |  Off   |  Off   |  Off  |  On   |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |  IRQ7   |  Off   |  Off   |  Off   |  Off  |  Off  |  On   |
   +------------------------------------------------------------+