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       # COMTROL CORPORATION
       
          HOSTESS I8
       
          Card Type          I/O controller                              
          Chipset/Controller NEC Corporation                             
          I/O Options        Serial ports (8 or 16)                      
          Maximum DRAM       8MB                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Purpose        | Location  |   Purpose    | Location |
          |----------------------+-----------+--------------+----------|
          | 100 Pin interface    |    CN1    | Upgrade      |    P1    |
          | connector            |           | connector 4  |          |
          |----------------------+-----------+--------------+----------|
          | Upgrade connector 1  |    J1     | Upgrade      |    P2    |
          |                      |           | connector 5  |          |
          |----------------------+-----------+--------------+----------|
          | Upgrade connector 2  |    J2     | Upgrade      |    P4    |
          |                      |           | connector 6  |          |
          |----------------------+-----------+--------------+----------|
          | Upgrade connector 3  |    J4     |              |          |
          |------------------------------------------------------------|
          | Note: Connectors J1, J2 and J4 interface with connectors   |
          | P1, P2 and P4 respectively.                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   I/O ADDRESS SELECTION                    |
          |------------------------------------------------------------|
          |  Address   |   SW1/1   |   SW1/2   |   SW1/3   |   SW1/4   |
          |------------+-----------+-----------+-----------+-----------|
          |    218h    |    Off    |    Off    |    Off    |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |    21Ch    |    On     |    Off    |    Off    |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |    238h    |    Off    |    On     |    Off    |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |    23Ch    |    On     |    On     |    Off    |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |    318h    |    Off    |    Off    |    On     |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |    31Ch    |    On     |    Off    |    On     |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |    338h    |    Off    |    On     |    On     |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |    33Ch    |    On     |    On     |    On     |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |    618h    |    Off    |    Off    |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |    61Ch    |    On     |    Off    |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |    638h    |    Off    |    On     |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |    63Ch    |    On     |    On     |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |    718h    |    Off    |    Off    |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |    71Ch    |    On     |    Off    |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |    738h    |    Off    |    On     |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |    73Ch    |    On     |    On     |    On     |    On     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   RS-232 MODE SELECTION                    |
          |------------------------------------------------------------|
          |            Port            |            RS-232             |
          |----------------------------+-------------------------------|
          |           JP1-16           |       Pins 1 & 2 closed       |
          +------------------------------------------------------------+
       
 (IMG) IMG 2
          
       
          +------------------------------------------------------------+
          |                   RS-422 MODE SELECTION                    |
          |------------------------------------------------------------|
          |           Jumper           |            RS-422             |
          |----------------------------+-------------------------------|
          |          JP1-4/1           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP1-4/2           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP1-4/3           |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |          JP1-4/4           |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |           JP5-8            |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |           JP9-16           |       Pins 2 & 3 closed       |
          +------------------------------------------------------------+
       
 (IMG) IMG 3
          
       
          +------------------------------------------------------------+
          |                   RS-485 MODE SELECTION                    |
          |------------------------------------------------------------|
          |            Port            |            RS-485             |
          |----------------------------+-------------------------------|
          |           JP1-16           |       Pins 2 & 3 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |            Size            |            Bank 0             |
          |----------------------------+-------------------------------|
          |           512KB            |         (2) 256K x 9          |
          |----------------------------+-------------------------------|
          |            2MB             |          (2) 1M x 9           |
          |----------------------------+-------------------------------|
          |            8MB             |          (2) 4M x 9           |
          +------------------------------------------------------------+