BOCA RESEARCH, INC.
===================

   IOAT43

   Card Type          MULTI I/O                                   
   Chipset Controller National Semiconductor                      
   I/O Options        Parallel port, Serial port (2)              
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/A-B/50915-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Purpose      | Location |     Purpose      | Location |
   |-------------------+----------+------------------+----------|
   | Serial port 2     |    J1    | Serial port 1    |    J2    |
   |-------------------+----------+------------------+----------|
   | Parallel port     |    J3    |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          PARALLEL PORT BASE I/O ADDRESS SELECTION          |
   |------------------------------------------------------------|
   |          Address           |             J5/C              |
   |----------------------------+-------------------------------|
   |            LPT1            |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |            LPT2            |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          SERIAL PORT 1 BASE I/O ADDRESS SELECTION          |
   |------------------------------------------------------------|
   |          Address           |             J5/A              |
   |----------------------------+-------------------------------|
   |            COM1            |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |            COM3            |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          SERIAL PORT 2 BASE I/O ADDRESS SELECTION          |
   |------------------------------------------------------------|
   |          Address           |             J5/B              |
   |----------------------------+-------------------------------|
   |            COM2            |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |            COM4            |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PARALLEL PORT INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |            IRQ             |             J5/D              |
   |----------------------------+-------------------------------|
   |>>    |          7          |       Pins 2 & 3 closed       |
   |------+---------------------+-------------------------------|
   |      |          5          |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 1 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   | IRQ   | J5/E pins 1 &  | J5/F pins | J5/G pins | J5/H pins |
   |       |       2        |   1 & 2   |   1 & 2   |   1 & 2   |
   |-------+----------------+-----------+-----------+-----------|
   |>> | 4 |      Open      |  Closed   |   Open    |   Open    |
   |---+---+----------------+-----------+-----------+-----------|
   |   | 3 |     Closed     |   Open    |   Open    |   Open    |
   |---+---+----------------+-----------+-----------+-----------|
   |   | 5 |      Open      |   Open    |  Closed   |   Open    |
   |---+---+----------------+-----------+-----------+-----------|
   |   | 9 |      Open      |   Open    |   Open    |  Closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 2 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   | IRQ   | J5/E pins 2 &  | J5/F pins | J5/G pins | J5/H pins |
   |       |       3        |   2 & 3   |   2 & 3   |   2 & 3   |
   |-------+----------------+-----------+-----------+-----------|
   |>> | 3 |     Closed     |   Open    |   Open    |   Open    |
   |---+---+----------------+-----------+-----------+-----------|
   |   | 4 |      Open      |  Closed   |   Open    |   Open    |
   |---+---+----------------+-----------+-----------+-----------|
   |   | 5 |      Open      |   Open    |  Closed   |   Open    |
   |---+---+----------------+-----------+-----------+-----------|
   |   | 9 |      Open      |   Open    |   Open    |  Closed   |
   +------------------------------------------------------------+