AST RESEARCH, INC.

FOUR PORT

Card Type   Serial
Chipset     Unidentified
I/O Options Serial ports (4)
Data Bus    8-bit ISA
Card Size   Full height, half length

[Image]

                                CONNECTIONS

               Function                               Label

  Serial ports via DB-37 port                          CN1

            Note:Standard DB-25 serial ports are provided on an included
            adapter cable.

                        USER CONFIGURABLE SETTINGS

                   Setting                      Label        Position

  »   Interrupt sharing disabled                SW3/3           On

      Interrupt sharing enabled                 SW3/3           Off

  »   Factory configured - do not alter         SW3/4           Off

                            INTERRUPT SELECTION

  Setting      SW1/1     SW1/2     SW1/3     SW2/1      SW2/2     SW2/3

        2       On        Off       Off       Off        Off       Off

        3       Off       On        Off       Off        Off       Off

  »     4       Off       Off        On       Off        Off       Off

        5       Off       Off       Off        On        Off       Off

        6       Off       Off       Off       Off        On        Off

        7       Off       Off       Off       Off        Off        On

                             ADDRESS SELECTION

   Port 1       Port 2       Port    Port    Control     SW3/1     SW3/2
                              3       4

    1A0h         1A8h       1B0h     1B8h      1BFh       Off       Off

    2A0h         2A8h       2B0h     2B8h      2BFh       Off       On

     3F8h         2F8h      1B0h     1B8h      1BFh       On        Off
   (COM1:)      (COM2:)

     3F8h         2F8h      2B0h     2B8h      2BFh       On        On
   (COM1:)      (COM2:)