BRAIN BOXES
===========

   AT TRIPLE RS232

   Card Type           Serial card                                
   Chip Set            Unidentified                               
   Data Bus            8-bit ISA                                  

<gopher://bitreich.org/I/th99/i/A-B/53923-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Label |      Function       | Label |
   |----------------------+-------+---------------------+-------|
   | 9-pin serial port 1  |  CN1  | 9-pin serial port 3 |  CN3  |
   |----------------------+-------+---------------------+-------|
   | 9-pin serial port 2  |  CN2  |                     |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 1 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |   COM port   |   Address   |   IRQ   |         J1          |
   |--------------+-------------+---------+---------------------|
   |   |   COM1   |    3F8h     |  IRQ4   |  Pins 1 & 2 closed  |
   |---+----------+-------------+---------+---------------------|
   |>> |   COM2   |    2F8h     |  IRQ3   |  Pins 3 & 4 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM3   |    3E8h     |  IRQ3   |  Pins 5 & 6 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM4   |    2E8h     |  IRQ3   |  Pins 7 & 8 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM5   |    1A0h     |  IRQ3   | Pins 9 & 10 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM6   |    1A8h     |  IRQ3   | Pins 11 & 12 closed |
   |---+----------+-------------+---------+---------------------|
   |   |   COM7   |    1B0h     |  IRQ3   | Pins 13 & 14 closed |
   |---+----------+-------------+---------+---------------------|
   |   |   COM8   |    1B8h     |  IRQ3   | Pins 15 & 16 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 2 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |   COM port   |   Address   |   IRQ   |         J2          |
   |--------------+-------------+---------+---------------------|
   |   |   COM1   |    3F8h     |  IRQ4   |  Pins 1 & 2 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM2   |    2F8h     |  IRQ3   |  Pins 3 & 4 closed  |
   |---+----------+-------------+---------+---------------------|
   |>> |   COM3   |    3E8h     |  IRQ3   |  Pins 5 & 6 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM4   |    2E8h     |  IRQ3   |  Pins 7 & 8 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM5   |    1A0h     |  IRQ3   | Pins 9 & 10 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM6   |    1A8h     |  IRQ3   | Pins 11 & 12 closed |
   |---+----------+-------------+---------+---------------------|
   |   |   COM7   |    1B0h     |  IRQ3   | Pins 13 & 14 closed |
   |---+----------+-------------+---------+---------------------|
   |   |   COM8   |    1B8h     |  IRQ3   | Pins 15 & 16 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 3 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |   COM port   |   Address   |   IRQ   |         J3          |
   |--------------+-------------+---------+---------------------|
   |   |   COM1   |    3F8h     |  IRQ4   |  Pins 1 & 2 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM2   |    2F8h     |  IRQ3   |  Pins 3 & 4 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM3   |    3E8h     |  IRQ3   |  Pins 5 & 6 closed  |
   |---+----------+-------------+---------+---------------------|
   |>> |   COM4   |    2E8h     |  IRQ3   |  Pins 7 & 8 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM5   |    1A0h     |  IRQ3   | Pins 9 & 10 closed  |
   |---+----------+-------------+---------+---------------------|
   |   |   COM6   |    1A8h     |  IRQ3   | Pins 11 & 12 closed |
   |---+----------+-------------+---------+---------------------|
   |   |   COM7   |    1B0h     |  IRQ3   | Pins 13 & 14 closed |
   |---+----------+-------------+---------+---------------------|
   |   |   COM8   |    1B8h     |  IRQ3   | Pins 15 & 16 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT IRQ SELECTION                  |
   |------------------------------------------------------------|
   |     IRQ     |      JP1       |     JP2      |     JP3      |
   |-------------+----------------+--------------+--------------|
   |    |  IRQ2  |  Pins 11 & 12  | Pins 11 & 12 | Pins 11 & 12 |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |    |  IRQ3  |  Pins 9 & 10   | Pins 9 & 10  | Pins 9 & 10  |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |>>  |  IRQ4  |   Pins 7 & 8   |  Pins 7 & 8  |  Pins 7 & 8  |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |    |  IRQ5  |   Pins 5 & 6   |  Pins 5 & 6  |  Pins 5 & 6  |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |    |  IRQ6  |   Pins 3 & 4   |  Pins 3 & 4  |  Pins 3 & 4  |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |    |  IRQ7  |   Pins 1 & 2   |  Pins 1 & 2  |  Pins 1 & 2  |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |    | IRQ10  |  Pins 13 & 14  | Pins 13 & 14 | Pins 13 & 14 |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |    | IRQ11  |  Pins 15 & 16  | Pins 15 & 16 | Pins 15 & 16 |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |    | IRQ12  |  Pins 17 & 18  | Pins 17 & 18 | Pins 17 & 18 |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |    | IRQ14  |  Pins 19 & 20  | Pins 19 & 20 | Pins 19 & 20 |
   |    |        |     closed     |    closed    |    closed    |
   |----+--------+----------------+--------------+--------------|
   |    | IRQ15  |  Pins 21 & 22  | Pins 21 & 22 | Pins 21 & 22 |
   |    |        |     closed     |    closed    |    closed    |
   |------------------------------------------------------------|
   | Note: JP1 controls COM1. JP2 controls COM2. JP3 controls   |
   | COM3.                                                      |
   +------------------------------------------------------------+