Multi-tech systems, inc.

isi551pc

Card Type              Serial interface
Chip Set               Unidentified
Maximum Onboard Memory Unidentified
I/O Options            Serial port
Data Bus               16-bit ISA (EISA also available)

[Image]

           CONNECTIONS

     Purpose         Location

  Serial port 1         J1

                        USER CONFIGURABLE SETTINGS

                                           Label            Location

  »   Factory configured do not            SW1/8               On
      alter

                         PORT 1 ADDRESS SELECTION

  IRQ       JP1/          JP1/         JP1/         JP1/         JP1/

          Pins 1 & 2   Pins 3 & 4   Pins 5 & 6   Pins 7 & 8   Pins 9 & 10

   2       Closed         Open         Open         Open         Open

   3        Open         Closed        Open         Open         Open

   4        Open          Open        Closed        Open         Open

   5        Open          Open         Open        Closed        Open

   7        Open          Open         Open         Open        Closed

   10       Open          Open         Open         Open         Open

   11       Open          Open         Open         Open         Open

   12       Open          Open         Open         Open         Open

   15       Open          Open         Open         Open         Open

                 PORT 1 ADDRESS SELECTION (CONTINUED)

  IRQ        JP1/           JP1/            JP1/            JP1/

         Pins 11 & 12    Pins 13 & 14    Pins 15 & 16   Pins 17 & 18

   2         Open           Open            Open            Open

   3         Open           Open            Open            Open

   4         Open           Open            Open            Open

   5         Open           Open            Open            Open

   7         Open           Open            Open            Open

  10        Closed          Open            Open            Open

  11         Open          Closed           Open            Open

  12         Open           Open           Closed           Open

  15         Open           Open            Open           Closed

                        SERIAL PORT ADDRESS SELECT

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

      100h      On       On       On       On      On       Off      On

      108h      Off      On       On       On      On       Off      On

      110h      On       Off      On       On      On       Off      On

      118h      Off      Off      On       On      On       Off      On

      120h      On       On      Off       On      On       Off      On

       2E8h     Off      On      Off      Off      Off      On      Off
       (COM
       4:)

  »    2F8h     Off      Off     Off      Off      Off      On      Off
       (COM
       2:)

      3D8h      Off      Off      On      Off      Off      Off     Off

      3E0h      On       On      Off      Off      Off      Off     Off

       3E8h     Off      On      Off      Off      Off      Off     Off
       (COM
       3:)

      3F0h      On       Off     Off      Off      Off      Off     Off

       3F8h     Off      Off     Off      Off      Off      Off     Off
       (COM
       1:)

                                   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=1, On=0)

             MISCELLANEOUS TECHNICAL NOTES

  Orientation of SW1 may vary in different revisions.