DTK COMPUTER, INC.
==================

   MINI 286 COURIER I/O CARD

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

<gopher://bitreich.org/I/th99/i/C-D/50368-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |    Purpose    |   Location   |    Purpose    |  Location   |
   |---------------+--------------+---------------+-------------|
   | Parallel port |     CN1      | Serial port 2 |     CN3     |
   |---------------+--------------+---------------+-------------|
   | Serial port 1 |     CN2      |               |             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |   Port 1   | Port 2 (CN3) |        JP2        |    JP1     |
   |   (CN2)    |              |                   |            |
   |------------+--------------+-------------------+------------|
   |>>  | COM1  |     COM2     | Pins 2 & 3, 4 & 5 | Pins 1 & 2 |
   |    |       |              |      closed       |   closed   |
   |----+-------+--------------+-------------------+------------|
   |    | COM2  |     COM1     | Pins 1 & 2, 5 & 6 | Pins 1 & 2 |
   |    |       |              |      closed       |   closed   |
   |----+-------+--------------+-------------------+------------|
   |    | COM3  |     COM4     | Pins 2 & 3, 4 & 5 | Pins 3 & 4 |
   |    |       |              |      closed       |   closed   |
   |----+-------+--------------+-------------------+------------|
   |    | COM4  |     COM3     | Pins 1 & 2, 5 & 6 | Pins 3 & 4 |
   |    |       |              |      closed       |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT INTERRUPT SELECT                |
   |------------------------------------------------------------|
   |  Port 1 (CN2)  | Port 2 (CN3)  |            JP3            |
   |----------------+---------------+---------------------------|
   |>>   |   IRQ4   |     IRQ3      | Pins 1 & 2, 5 & 6 closed  |
   |-----+----------+---------------+---------------------------|
   |     |   IRQ3   |     IRQ4      | Pins 2 & 3, 4 & 5 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               PARALLEL PORT INTERRUPT SELECT               |
   |------------------------------------------------------------|
   |     IRQ     |  System Type  |   JP4    |        JP5        |
   |-------------+---------------+----------+-------------------|
   |>> |  IRQ7   | AT compatible |   Open   | Pins 3 & 4 closed |
   |---+---------+---------------+----------+-------------------|
   |   |  IRQ5   | AT compatible |  Closed  | Pins 1 & 2 closed |
   |---+---------+---------------+----------+-------------------|
   |   |  IRQ7   | XT compatible |   Open   | Pins 3 & 4 closed |
   |---+---------+---------------+----------+-------------------|
   |   |  IRQ7   | XT compatible |  Closed  | Pins 3 & 4 closed |
   +------------------------------------------------------------+