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       # COMTROL CORPORATION
       
          HOSTESS I/E 8
       
          Card Type          I/O controller                              
          Chipset/Controller NEC Corporation                             
          I/O Options        Serial ports (8 or 16)                      
          Maximum DRAM       2MB                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Purpose       | Location  |    Purpose    | Location |
          |---------------------+-----------+---------------+----------|
          | 100 Pin interface   |    CN1    | Upgrade       |    P1    |
          | connector           |           | connector 2   |          |
          |---------------------+-----------+---------------+----------|
          | Upgrade connector 1 |    J1     | Upgrade       |    P2    |
          |                     |           | connector 3   |          |
          |---------------------+-----------+---------------+----------|
          | Upgrade connector   |    J2     |               |          |
          |------------------------------------------------------------|
          | Note:Connectors J1 and J2 interface with connectors P1 and |
          | P2.                                                        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    DRAM CONFIGURATION                      |
          |------------------------------------------------------------|
          |            Size            |            Bank 0             |
          |----------------------------+-------------------------------|
          |           512KB            |         (2) 256K x 9          |
          |----------------------------+-------------------------------|
          |            2MB             |          (2) 1M x 9           |
          +------------------------------------------------------------+
       
 (IMG) IMG 2
          
       
          +------------------------------------------------------------+
          |                   RS-232 MODE SELECTION                    |
          |------------------------------------------------------------|
          |           Jumper           |            RS-232             |
          |----------------------------+-------------------------------|
          |          JP1/A-D           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP2/A-D           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP3/A-D           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP4/A-D           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP5/A-C           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP6/A-C           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP7/A-C           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP8/A-C           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP9/A-C           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP10/A-C          |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP11/A-C          |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP12/A-C          |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP13/A-C          |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP14/A-C          |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP15/A-C          |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP16/A-C          |       Pins 1 & 2 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   RS-422 MODE SELECTION                    |
          |------------------------------------------------------------|
          |           Jumper           |            RS-422             |
          |----------------------------+-------------------------------|
          |          JP1/A-C           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |           JP1/D            |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP2/A-C           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |           JP2/D            |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP3/A-C           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |           JP3/D            |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP4/A-C           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |           JP4/D            |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          JP5/A-C           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP6/A-C           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP7/A-C           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP8/A-C           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP9/A-C           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP10/A-C          |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP11/A-C          |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP12/A-C          |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP13/A-C          |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP14/A-C          |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP15/A-C          |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP16/A-C          |       Pins 2 & 3 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               MISCELLANEOUS TECHNICAL NOTE                 |
          |------------------------------------------------------------|
          |     Serial ports are located on an interface box which     |
          |  connects to the Hostess I/E 8 via the 100-pin interface   |
          |                         connector.                         |
          +------------------------------------------------------------+