QUATECH, INC.
=============

   BCA-100

   Card Type          Serial/Parallel interface                   
   Chipset/Controller Zilog                                       
   I/O Options        Serial/Parallel port                        
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/P-R/50445-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |        Purpose        | Location |   Purpose    | Location |
   |-----------------------+----------+--------------+----------|
   | DB-25 serial/parallel |   CN1    | Standy clock |    J4    |
   | port                  |          | output       |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE MEMORY ADDRESS SELECT                 |
   |------------------------------------------------------------|
   | Address | SW1/1  | SW1/2  | SW1/3  | SW1/4 | SW1/5 | SW1/6 |
   |---------+--------+--------+--------+-------+-------+-------|
   |  27Xh   |  Off   |   On   |   On   |  Off  |  Off  |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |  2EXh   |  Off   |   On   |  Off   |  Off  |  Off  |  On   |
   |---------+--------+--------+--------+-------+-------+-------|
   |  2FXh   |  Off   |   On   |  Off   |  Off  |  Off  |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |  37Xh   |  Off   |  Off   |   On   |  Off  |  Off  |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |  3EXh   |  Off   |  Off   |  Off   |  Off  |  Off  |  On   |
   |---------+--------+--------+--------+-------+-------+-------|
   |  3FXh   |  Off   |  Off   |  Off   |  Off  |  Off  |  Off  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CLOCK SPEED SELECT                     |
   |------------------------------------------------------------|
   |         Divide by          |              J7               |
   |----------------------------+-------------------------------|
   |             1              |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |             2              |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   DTE/DCE CONFIGURATION                    |
   |------------------------------------------------------------|
   |      Jumper      |      J5 (DTE)      |      J6 (DCE)      |
   |------------------+--------------------+--------------------|
   |        A         |         On         |        Off         |
   |------------------+--------------------+--------------------|
   |        B         |         On         |        Off         |
   |------------------+--------------------+--------------------|
   |        C         |         On         |        Off         |
   |------------------+--------------------+--------------------|
   |        D         |         On         |        Off         |
   |------------------+--------------------+--------------------|
   |        E         |         On         |        Off         |
   |------------------+--------------------+--------------------|
   |        F         |        Off         |        Off         |
   |------------------+--------------------+--------------------|
   |        G         |         On         |         On         |
   |------------------+--------------------+--------------------|
   |        H         |         On         |        Off         |
   |------------------+--------------------+--------------------|
   |        I         |        Off         |        Off         |
   |------------------+--------------------+--------------------|
   |        J         |         On         |        Off         |
   |------------------+--------------------+--------------------|
   |        K         |        Off         |        Off         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      INTERRUPT SELECT                      |
   |------------------------------------------------------------|
   | IRQ  |  J1/A  |  J1/B  |  J1/C  |  J1/D  |  J1/E  |  J1/F  |
   |------+--------+--------+--------+--------+--------+--------|
   | IRQ2 | Closed |  Open  |  Open  |  Open  |  Open  |  Open  |
   |------+--------+--------+--------+--------+--------+--------|
   | IRQ3 |  Open  | Closed |  Open  |  Open  |  Open  |  Open  |
   |------+--------+--------+--------+--------+--------+--------|
   | IRQ4 |  Open  |  Open  | Closed |  Open  |  Open  |  Open  |
   |------+--------+--------+--------+--------+--------+--------|
   | IRQ5 |  Open  |  Open  |  Open  | Closed |  Open  |  Open  |
   |------+--------+--------+--------+--------+--------+--------|
   | IRQ6 |  Open  |  Open  |  Open  |  Open  | Closed |  Open  |
   |------+--------+--------+--------+--------+--------+--------|
   | IRQ7 |  Open  |  Open  |  Open  |  Open  |  Open  | Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    RECEIVE CLOCK SOURCE                    |
   |------------------------------------------------------------|
   |       Source        |    J3/A    |    J3/B    |    J3/C    |
   |---------------------+------------+------------+------------|
   |     TXCA clock      |     On     |    Off     |    Off     |
   |---------------------+------------+------------+------------|
   | RXCi external clock |    Off     |     On     |    Off     |
   |---------------------+------------+------------+------------|
   |        CLKA         |    Off     |    Off     |     On     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   TRANSMIT CLOCK SOURCE                    |
   |------------------------------------------------------------|
   |       Source        |    J2/A    |    J2/B    |    J2/C    |
   |---------------------+------------+------------+------------|
   |     RXCA clock      |     On     |    Off     |    Off     |
   |---------------------+------------+------------+------------|
   | TXCi external clock |    Off     |     On     |    Off     |
   |---------------------+------------+------------+------------|
   |        CLKB         |    Off     |    Off     |     On     |
   +------------------------------------------------------------+