
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

[Image]

                                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 2     Open
                                                         & 3

      IRQ4     Open      Open      Open      Pins 2     Open      Open
                                               & 3

       IRQ5     Open      Open      Pins 2     Open      Open      Open
                                     & 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 1     Open
                                                         & 2

       IRQ4     Open      Open      Open      Pins 1     Open      Open
                                               & 2

       IRQ5     Open      Open      Pins 1     Open      Open      Open
                                     & 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         Open             Open            Closed
   control 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         Open             Open            Closed
   control 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

