SIIG, INC.

TWINCOM A.2

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

[Image]

                            CONNECTIONS

        Purpose          Location         Purpose          Location

  Serial port 1            J1       Serial port 2            J2

            PORT 1 CONFIGURATION

         Port                  jP3

         COM1           Pins 5 & 9 closed

         COM2          Pins 6 & 10 closed

         COM3          Pins 7 & 11 closed

         COM4          Pins 8 & 12 closed

       Disabled               Open

       PORT 1 INTERRUPT CONFIGURATION

         IRQ                   jP4

          2             Pins 1 & 5 closed

          3             Pins 2 & 6 closed

          4             Pins 5 & 9 closed

          5            Pins 6 & 10 closed

       Disabled               Open

           PORT 2 CONFIGURATION

        Port                 jP3

        COM1          Pins 1 & 5 closed

        COM2          Pins 2 & 6 closed

        COM3          Pins 3 & 7 closed

        COM4           Pins 4 & 8closed

      Disabled               Open

       PORT 2 INTERRUPT CONFIGURATION

         IRQ                   jP4

          2             Pins 3 & 7 closed

          3             Pins 4 & 8 closed

          4            Pins 7 & 11 closed

          5            Pins 8 & 12 closed

       Disabled               Open

                       SECOND SERIAL PORT ACTIVATION

  To activate the second serial port, the following chips must be
  installed:

                Chip                                Socket

             16450 ASIC                               U1

                1488                                  U2

                1489                                  U3