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

   AT DUAL RS232 9 & 25

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

<gopher://bitreich.org/I/th99/i/A-B/53924-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Label |      Function       | Label |
   |----------------------+-------+---------------------+-------|
   | 9-pin serial port 1  |  CN1  | 26-pin parallel     |  CN3  |
   |                      |       | port - internal     |       |
   |----------------------+-------+---------------------+-------|
   | 25-pin serial port 2 |  CN2  |                     |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function             |    Label     | Position |
   |----------------------------------+--------------+----------|
   |>> | Parallel port unidirectional | J1/pins 11 & |   Open   |
   |   |                              |      12      |          |
   |---+------------------------------+--------------+----------|
   |   | Parallel port bidirectional  | J1/pins 11 & |  Closed  |
   |   |                              |      12      |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               SERIAL PORT ADDRESS SELECTION                |
   |------------------------------------------------------------|
   |    Setting     |      J2 Port 1      |      J2 Port 2      |
   |----------------+---------------------+---------------------|
   |      COM1      |  Pins 1 & 2 closed  |  Pins 2 & 3 closed  |
   |----------------+---------------------+---------------------|
   |      COM2      |  Pins 4 & 5 closed  |  Pins 5 & 6 closed  |
   |----------------+---------------------+---------------------|
   |      COM3      |  Pins 7 & 8 closed  |  Pins 8 & 9 closed  |
   |----------------+---------------------+---------------------|
   |      COM4      | Pins 10 & 11 closed | Pins 11 & 12 closed |
   |----------------+---------------------+---------------------|
   |      COM5      | Pins 13 & 14 closed | Pins 14 & 15 closed |
   |----------------+---------------------+---------------------|
   |      COM6      | Pins 16 & 17 closed | Pins 17 & 18 closed |
   |----------------+---------------------+---------------------|
   |      COM7      | Pins 19 & 20 closed | Pins 20 & 21 closed |
   |----------------+---------------------+---------------------|
   |      COM8      | Pins 22 & 23 closed | Pins 23 & 24 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 1 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |            IRQ             |              J3               |
   |----------------------------+-------------------------------|
   |    |         IRQ2          |      Pins 11 & 12 closed      |
   |----+-----------------------+-------------------------------|
   |>>  |         IRQ3          |      Pins 9 & 10 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ4          |       Pins 7 & 8 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ5          |       Pins 5 & 6 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ6          |       Pins 3 & 4 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ7          |       Pins 1 & 2 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ10         |      Pins 13 & 14 closed      |
   |----+-----------------------+-------------------------------|
   |    |         IRQ11         |      Pins 15 & 16 closed      |
   |----+-----------------------+-------------------------------|
   |    |         IRQ12         |      Pins 17 & 18 closed      |
   |----+-----------------------+-------------------------------|
   |    |         IRQ14         |      Pins 19 & 20 closed      |
   |----+-----------------------+-------------------------------|
   |    |         IRQ15         |      Pins 21 & 22 closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 2 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |            IRQ             |              J4               |
   |----------------------------+-------------------------------|
   |    |         IRQ2          |      Pins 11 & 12 closed      |
   |----+-----------------------+-------------------------------|
   |>>  |         IRQ3          |      Pins 9 & 10 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ4          |       Pins 7 & 8 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ5          |       Pins 5 & 6 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ6          |       Pins 3 & 4 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ7          |       Pins 1 & 2 closed       |
   |----+-----------------------+-------------------------------|
   |    |         IRQ10         |      Pins 13 & 14 closed      |
   |----+-----------------------+-------------------------------|
   |    |         IRQ11         |      Pins 15 & 16 closed      |
   |----+-----------------------+-------------------------------|
   |    |         IRQ12         |      Pins 17 & 18 closed      |
   |----+-----------------------+-------------------------------|
   |    |         IRQ14         |      Pins 19 & 20 closed      |
   |----+-----------------------+-------------------------------|
   |    |         IRQ15         |      Pins 21 & 22 closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PARALLEL PORT INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |       IRQ        |   J1/pins 7 & 8    |   J1/pins 9 & 10   |
   |------------------+--------------------+--------------------|
   |   |     IRQ7     |        Open        |       Closed       |
   |---+--------------+--------------------+--------------------|
   |>> |     IRQ5     |       Closed       |        Open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  PARALLEL PORT SELECTION                   |
   |------------------------------------------------------------|
   |  Setting   | J1/pins 1 & 2 | J1/pins 3 & 4 | J1/pins 5 & 6 |
   |------------+---------------+---------------+---------------|
   |   |  LPT1  |    Closed     |     Open      |     Open      |
   |---+--------+---------------+---------------+---------------|
   |   |  LPT2  |     Open      |    Closed     |     Open      |
   |---+--------+---------------+---------------+---------------|
   |>> |  LPT3  |     Open      |     Open      |    Closed     |
   +------------------------------------------------------------+