DIGITAL COMMUNICATION ASSOCIATES, INC.
======================================

   SYNCHRONOUS COMMUNICATIONS ADAPTER

   Card Type          Serial controller                           
   Chipset/Controller Zilog 8085                                  
   I/O Options        Serial port                                 
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/C-D/50358-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |            Purpose            |          Location          |
   |-------------------------------+----------------------------|
   | Serial port                   |            CN1             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 I/O ADDRESS CONFIGURATION                  |
   |------------------------------------------------------------|
   | Address |  J2A   |  J2B   |  J2C   |  J2D  |  J2E  |  J2F  |
   |---------+--------+--------+--------+-------+-------+-------|
   |>> | 380h |  Open  |  Open  |  Open  | Open  |Closed | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |  | 300h | Closed |  Open  |  Open  | Open  | Open  | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |  | 308h |  Open  | Closed |  Open  | Open  | Open  | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |  | 340h |  Open  |  Open  | Closed | Open  | Open  | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |  | 348h |  Open  |  Open  |  Open  |Closed | Open  | Open  |
   |--+------+--------+--------+--------+-------+-------+-------|
   |  | 388h |  Open  |  Open  |  Open  | Open  | Open  |Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SLOT NUMBER &AMP; PC/XT SETTINGS              |
   |------------------------------------------------------------|
   |                Setting                 |        J1         |
   |----------------------------------------+-------------------|
   |>> | Card in slot other than slot 8 on  | Pins 2 & 3 closed |
   |   |               PC/XT                |                   |
   |---+------------------------------------+-------------------|
   |   |      Card in slot 8 of PC/XT       | Pins 1 & 2 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      INTERRUPT SELECT                      |
   |------------------------------------------------------------|
   |  IRQ   |  J5A   |  J5B   |  J5C   |  J5D   |  J5E  |  J5F  |
   |--------+--------+--------+--------+--------+-------+-------|
   |>>| IRQ3 |  Open  | Closed |  Open  |  Open  | Open  | Open  |
   |-+------+--------+--------+--------+--------+-------+-------|
   | | IRQ2 | Closed |  Open  |  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 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                FACTORY CONFIGURED SETTINGS                 |
   |------------------------------------------------------------|
   |           Jumper           |            Setting            |
   |----------------------------+-------------------------------|
   |             J3             |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |             J4             |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+