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

[Image]

                                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          On              Off
                           closed

          2           Pins 1 & 2, 3 & 4          On              On
                           closed

  »       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