DIGI INTERNATIONAL, INC.
========================

   MC/4I+, MC/8I+ (RS-422/485 VERSION)

   Card Type            Serial                                    
   Processor            80C186                                    
   Processor Speed      Unidentified                              
   Chipset              Unidentified                              
   Maximum Onboard      256KB dual-ported RAM                     
   Memory               
   I/O Options          Serial ports (5 for MC/4i+, 9 for MC/8i+) 
   Data Bus             MCA                                       
   Card Size            Full height, full length                  

<gopher://bitreich.org/I/th99/i/C-D/53319-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |          Function          | Label |   Function    | Label |
   |----------------------------+-------+---------------+-------|
   | RS-422 or RS-485           |  CN1  | Header to H2B |  H2A  |
   | asynchronous serial ports  |       |               |       |
   | via DB-78 connector        |       |               |       |
   |----------------------------+-------+---------------+-------|
   | RS-422 or RS-485           |  CN2  | Header to H2A |  H2B  |
   | synchronous serial port    |       |               |       |
   | via RJ-45 connector        |       |               |       |
   |----------------------------+-------+---------------+-------|
   | Header to H1B              |  H1A  | Header to H3B |  H3A  |
   |----------------------------+-------+---------------+-------|
   | Header to H1A              |  H1B  | Header to H3A |  H3B  |
   |------------------------------------------------------------|
   |      Note:Standard serial ports are provided on an         |
   |      included adapter cable.                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Setting              | Label |    Position    |
   |-----------------------------------+-------+----------------|
   |>> | Shared memory window is 32KB  |  JP1  |   Pins 2 & 3   |
   |   |                               |       |     closed     |
   |---+-------------------------------+-------+----------------|
   |   | Shared memory window is 128KB |  JP1  |   Pins 1 & 2   |
   |   |                               |       |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    EPROM SIZE SELECTION                    |
   |------------------------------------------------------------|
   |     Setting      |         J5         |         J6         |
   |------------------+--------------------+--------------------|
   |       16KB       | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |       32KB       | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |       64KB       | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |      128KB       | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |       SYNCHRONOUS PORT PINS 1 &AMP; 2 CONFIGURATION        |
   |------------------------------------------------------------|
   |           Pin 1            |      Pin 2       |     J1     |
   |----------------------------+------------------+------------|
   |        CTS positive        |   CTS negative   | Pins 1 & 2 |
   |                            |                  |   closed   |
   |----------------------------+------------------+------------|
   |   Receive/transmit clock   | Receive/transmit | Pins 2 & 3 |
   |          positive          |  clock negative  |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |       SYNCHRONOUS PORT PINS 9 &AMP; 10 CONFIGURATION       |
   |------------------------------------------------------------|
   |           Pin 9            |      Pin 10      |     J2     |
   |----------------------------+------------------+------------|
   |        RTS positive        |   RTS negative   | Pins 1 & 2 |
   |                            |                  |   closed   |
   |----------------------------+------------------+------------|
   |   Transmit/receive clock   | Transmit/receive | Pins 2 & 3 |
   |          positive          |  clock negative  |   closed   |
   +------------------------------------------------------------+