
CHASE RESEARCH, INC.

CHASE IOXTRA

Card Type   Serial card
Chip Set    Unidentified
I/O Options Serial ports (2)
Card Size   Half-length, full-height
Data Bus    8-bit ISA

[Image]

                                CONNECTIONS

          Function            Label           Function             Label

  Serial port A               CN1     Serial port B                 CN2

                        USER CONFIGURABLE SETTINGS

                 Function                   Label          Position

  Serial port A enabled                       J4      Pins 2 & 3 closed

  Serial port A disabled                      J4      Pins 1 & 2 closed

  Serial port B enabled                       J5      Pins 2 & 3 closed

  Serial port B disabled                      J5      Pins 1 & 2 closed

                                 CLOCK SET

  Clock     J1/A       J1/B       J1/C       J1/D      J1/E        J1/F

   2C0     Closed      Open       Open       Open      Open        Open

   2C8      Open      Closed      Open       Open      Open        Open

   2D0      Open       Open      Closed      Open      Open        Open

   2D8      Open       Open       Open      Closed     Open        Open

   3C0      Open       Open       Open       Open     Closed       Open

   3C8      Open       Open       Open       Open      Open       Closed

            SERIAL PORT A ADDRESS SELECTION

           Setting                       J7

            COM1               Pins 1 & 3, 2 & 4 closed

            COM3               Pins 1 & 3, 4 & 6 closed

            SERIAL PORT B ADDRESS SELECTION

           Setting                       J6

            COM2               Pins 3 & 5, 2 & 4 closed

            COM4               Pins 3 & 5, 4 & 6 closed

           SERIAL PORT A INTERRUPT SETTINGS

  IRQ     J2/A         J2/B        J2/C        J2/D

   3     Closed        Open        Open        Open

   4      Open        Closed       Open        Open

   5      Open         Open       Closed       Open

   9      Open         Open        Open       Closed

           SERIAL PORT B INTERRUPT SETTINGS

  IRQ     J3/A         J3/B        J3/C        J3/D

   3     Closed        Open        Open        Open

   4      Open        Closed       Open        Open

   5      Open         Open       Closed       Open

   9      Open         Open        Open       Closed

