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

   PTI-207 AT RS-232 4 PORT

   Card Type              Serial card                             
   Chip Set               8250 CHIP                               
   Maximum Onboard Memory None                                    
   I/O Options            serial ports (4)                        
   Data Bus               Unidentified                            

<gopher://bitreich.org/I/th99/i/C-D/52638-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Label |      Function       | Label |
   |----------------------+-------+---------------------+-------|
   | Serial port 1        |  J1   | Serial port 3       |  J3   |
   |----------------------+-------+---------------------+-------|
   | Serial port 2        |  J2   | Serial port 4       |  J4   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            | Label |     Position      |
   |--------------------------------+-------+-------------------|
   | Serial port 1 IRQ4 enabled     | JP1/1 | Pins 1 & 2 closed |
   |--------------------------------+-------+-------------------|
   | Serial port 1 IRQ3 enabled     | JP1/1 | Pins 2 & 3 closed |
   |--------------------------------+-------+-------------------|
   | Serial port 2 IRQ4 enabled     | JP1/2 | Pins 1 & 2 closed |
   |--------------------------------+-------+-------------------|
   | Serial port 2 IRQ3 enabled     | JP1/2 | Pins 2 & 3 closed |
   |--------------------------------+-------+-------------------|
   | Serial port 3 IRQ5 enabled     | JP1/3 | Pins 1 & 2 closed |
   |--------------------------------+-------+-------------------|
   | Serial port 3 IRQ2 enabled     | JP1/3 | Pins 2 & 3 closed |
   |--------------------------------+-------+-------------------|
   | Serial port 4 IRQ5 enabled     | JP1/4 | Pins 1 & 2 closed |
   |--------------------------------+-------+-------------------|
   | Serial port 4 IRQ2 enabled     | JP1/4 | Pins 2 & 3 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         BASE I/O ADDRESS SELECTION (SERIAL PORT 1)         |
   |------------------------------------------------------------|
   |    Setting    |     SW1/1     |    SW1/3     |    SW1/5    |
   |---------------+---------------+--------------+-------------|
   |  3F8h - 3FFh  |      On       |     Off      |     Off     |
   |---------------+---------------+--------------+-------------|
   |  2F8h - 2FFh  |      Off      |      On      |     Off     |
   |---------------+---------------+--------------+-------------|
   |  3E8h - 3EFh  |      Off      |     Off      |     On      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         BASE I/O ADDRESS SELECTION (SERIAL PORT 2)         |
   |------------------------------------------------------------|
   |    Setting    |     SW1/2     |    SW1/4     |    SW1/6    |
   |---------------+---------------+--------------+-------------|
   |  3F8h - 3FFh  |      Off      |      On      |     Off     |
   |---------------+---------------+--------------+-------------|
   |  2F8h - 2FFh  |      On       |     Off      |     Off     |
   |---------------+---------------+--------------+-------------|
   |  2E8h - 2EFh  |      Off      |     Off      |     On      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         BASE I/O ADDRESS SELECTION (SERIAL PORT 3)         |
   |------------------------------------------------------------|
   |      Setting       |       SW1/7       |       SW1/9       |
   |--------------------+-------------------+-------------------|
   |    3E8h - 3EFh     |        On         |        Off        |
   |--------------------+-------------------+-------------------|
   |    2E8h - 2EFh     |        Off        |        On         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |         BASE I/O ADDRESS SELECTION (SERIAL PORT 4)         |
   |------------------------------------------------------------|
   |      Setting       |       SW1/8       |      SW1/10       |
   |--------------------+-------------------+-------------------|
   |    3E8h - 3EFh     |        Off        |        On         |
   |--------------------+-------------------+-------------------|
   |    2E8h - 2EFh     |        On         |        Off        |
   +------------------------------------------------------------+