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

[Image]

                                CONNECTIONS

         Function            Label            Function            Label

  RS-232 or RS-422 serial     IO1      Interrupt daisy-chain       JP3
  ports via unidentified               in
  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)