BOCA RESEARCH, INC.

IO 2 BY 4

Card Type          Multi I/O card
Chipset/Controller 16C550
I/O Options        Parallel ports (2), serial ports (4)
Maximum DRAM       N/A

[Image]

                            CONNECTIONS

        Purpose          Location         Purpose          Location

  I/O connector 1          CN1      I/O connector 2          CN2

                      SERIAL PORT CONFIGURATION

    Port      Status       J3/A       J3/B        J3/C       J3/D

     1        Enabled     Closed       N/A         N/A        N/A

     1        Disabled     Open        N/A         N/A        N/A

     2        Enabled      N/A       Closed        N/A        N/A

     2        Disabled     N/A        Open         N/A        N/A

     3        Enabled      N/A         N/A       Closed       N/A

     3        Disabled     N/A         N/A        Open        N/A

     4        Enabled      N/A         N/A         N/A      Closed

     4        Disabled     N/A         N/A         N/A       Open

                   PRIMARY SERIAL PORT INTERRUPT SELECT

       IRQ            J4/Q          J4/R          J4/S           J4/T

  »      IRQ4         Open         Closed         Open           Open

         IRQ2         Open          Open          Open          Closed

         IRQ3         Open          Open         Closed          Open

         IRQ5        Closed         Open          Open           Open

                    SECOND SERIAL PORT INTERRUPT SELECT

       IRQ            J4/M          J4/N          J4/O           J4/P

  »      IRQ3         Open          Open         Closed          Open

         IRQ2         Open          Open          Open          Closed

         IRQ4         Open         Closed         Open           Open

         IRQ5        Closed         Open          Open           Open

       THIRD SERIAL PORT INTERRUPT SELECT

   IRQ      J4/I      J4/J      J4/K      J4/L

   IRQ2     Open      Open      Open     Closed

   IRQ3     Open      Open     Closed     Open

   IRQ4     Open     Closed     Open      Open

   IRQ5    Closed     Open      Open      Open

       FOURTH SERIAL PORT INTERRUPT SELECT

   IRQ      J4/E      J4/F      J4/G      J4/H

   IRQ2     Open      Open      Open     Closed

   IRQ3     Open      Open     Closed     Open

   IRQ4     Open     Closed     Open      Open

   IRQ5    Closed     Open      Open      Open

                        PARALLEL PORT CONFIGURATION

        Port 1               J3/E            Port 2             J3/F

  »       Enabled           Closed           Enabled           Closed

          Disabled           Open           Disabled            Open

                      PARALLEL PORT INTERRUPT SELECT

    Port 1         J4/C        J4/D      Port 2      J4/A         J4/B

  »    IRQ7       Closed       Open       IRQ5       Open        Closed

       IRQ5        Open       Closed      IRQ7      Closed        Open