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

   MPA-2000/3000

   Category               Serial Controller                       
   Chipset Controller     Intel Corporation                       
   I /O Options Supported Serial port                             
   Maximum Onboard Memory N/A                                     

<gopher://bitreich.org/I/th99/i/P-R/50607-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Purpose       | Location |     Purpose     | Location |
   |--------------------+----------+-----------------+----------|
   | DCE connector -    |   CN1    | DTE connector - |   CN2    |
   | female DB-25       |          | male DB-25      |          |
   |------------------------------------------------------------|
   | Note: Either CN1 or CN2 is installed, but not both.        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       DRIVER CONTROL                       |
   |------------------------------------------------------------|
   |                Setting                 |        J2         |
   |----------------------------------------+-------------------|
   |         Drivers always enabled         | pins 1 & 2 closed |
   |----------------------------------------+-------------------|
   |   Drivers enabled by communications    | pins 2 & 3 closed |
   |            register bit D0             |                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      RECEIVER CONTROL                      |
   |------------------------------------------------------------|
   |                Setting                 |        J2         |
   |----------------------------------------+-------------------|
   |        Receivers always enabled        | pins 4 & 5 closed |
   |----------------------------------------+-------------------|
   |  Receivers enabled by communications   | pins 5 & 6 closed |
   |            register bit D1             |                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    DMA REQUEST CHANNEL                     |
   |------------------------------------------------------------|
   |            Setting             |            J3             |
   |--------------------------------+---------------------------|
   | DTR/REQA for transmitting data |     pins 1 & 2 closed     |
   |--------------------------------+---------------------------|
   |  RDY/REQB for receiving data   |     pins 2 & 3 closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |          J1 is factory configured - do not alter.          |
   +------------------------------------------------------------+