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       # COMTROL CORPORATION
       
          HOSTESS 550/MC 16
       
          Card Type          I/O controller                              
          Chipset/Controller NEC Corporation                             
          I/O Options        Serial ports (8 or 16)                      
          Maximum DRAM       N/A                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |            Purpose            |          Location          |
          |-------------------------------+----------------------------|
          | 100 Pin interface connector   |            CN1             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                RS-232/RS-422 MODE SELECTION                |
          |------------------------------------------------------------|
          |      Jumper      |       RS-232       |       RS-422       |
          |------------------+--------------------+--------------------|
          |     JP1A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |     JP2A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |     JP3A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |     JP4A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |     JP5A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |     JP6A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |     JP7A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |     JP8A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |     JP9A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |    JP10A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |    JP11A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |    JP12A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |    JP13A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |    JP14A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |    JP15A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |    JP16A - D     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                MISCELLANEOUS TECHNICAL NOTE                |
          |------------------------------------------------------------|
          |     Serial ports are located on an interface box which     |
          |    connects to Hostess 550/MC via the 100-pin interface    |
          |                         connector.                         |
          +------------------------------------------------------------+