
MULTI-TECH SYSTEMS, INC.

ISI552PC

Card Type          Serial interface
Chipset Controller Unidentified
I/O Options        Serial ports (2)
Maximum Dram       N/A

[Image]

           CONNECTIONS

     Purpose         Location

  Serial port 1         J1

  Serial port 2         J2

  FACTORY CONFIGURED-DO NOT ALTER

      Switch           Setting

      SW1/8              Off

          PORT 1 INTERRUPT SELECTION

          IRQ                   JP1

           2             Pins 1 & 2 closed

           3             Pins 3 & 4 closed

           4             Pins 5 & 6 closed

           5             Pins 7 & 8 closed

           7             Pins 9 & 10 closed

          10            Pins 11 & 12 closed

          11            Pins 13 & 14 closed

          12            Pins 15 & 16 closed

          15            Pins 17 & 18 closed

          PORT 1 INTERRUPT SELECTION

          IRQ                   JP1

           2             Pins 1 & 2 closed

           3             Pins 3 & 4 closed

           4             Pins 5 & 6 closed

           5             Pins 7 & 8 closed

           7             Pins 9 & 10 closed

          10            Pins 11 & 12 closed

          11            Pins 13 & 14 closed

          12            Pins 15 & 16 closed

          15            Pins 17 & 18 closed

                           PORT 1 ADDRESS SELECT

  Address     SW1/7    SW1/6    SW1/5    SW1/4   SW1/3    SW1/2    SW1/1

    100h       Off      Off      On       Off     Off      Off      Off

    108h       Off      Off      On       Off     Off      Off       On

    110h       Off      Off      On       Off     Off       On      Off

    118h       Off      Off      On       Off     Off       On       On

    2E8h       On       Off      On       On       On      Off       On
  (COM4:)

    2F8h       On       Off      On       On       On       On       On
  (COM2:)

    3E0        On       On       On       On       On      Off      Off

    3E8h       On       On       On       On       On      Off       On
  (COM3:)

    3F0h       On       On       On       On       On       On      Off

    3F8h       On       On       On       On       On       On       On
  (COM1:)

  Note: A total of 752 memory base address settings are available. The
  switches are a binary representation of the decimal addresses. Switch 1
  is the Least Significant Bit and switch 7 is the Most Significant Bit.
  The switches have the following decimal values: switch 1=8, 2=16, 3=32,
  4=64, 5=128, 6=256, 7=512. Add the values of the on switches to obtain
  the correct memory address. (Off=0, On=1)

                           PORT 2 ADDRESS SELECT

  Address     SW2/7    SW2/6    SW2/5    SW2/4   SW2/3    SW2/2    SW2/1

    100h       Off      Off      On       Off     Off      Off      Off

    108h       Off      Off      On       Off     Off      Off       On

    110h       Off      Off      On       Off     Off       On      Off

    118h       Off      Off      On       Off     Off       On       On

    2E8h       On       Off      On       On       On      Off       On
  (COM4:)

    2F8h       On       Off      On       On       On       On       On
  (COM2:)

    3E0        On       On       On       On       On      Off      Off

    3E8h       On       On       On       On       On      Off       On
  (COM3:)

    3F0h       On       On       On       On       On       On      Off

    3F8h       On       On       On       On       On       On       On
  (COM1:)

  Note: A total of 752 memory base address settings are available. The
  switches are a binary representation of the decimal addresses. Switch 1
  is the Least Significant Bit and switch 7 is the Most Significant Bit.
  The switches have the following decimal values: switch 1=8, 2=16, 3=32,
  4=64, 5=128, 6=256, 7=512. Add the values of the on switches to obtain
  the correct memory address. (Off=0, On=1)

