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       # COMTROL CORPORATION
       
          HOSTESS CLUSTER
       
          Category               Serial controller                       
          Chipset Controller     NEC                                     
          I /O Options Supported Serial ports (16)                       
          Maximum Onboard Memory 2MB                                     
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Purpose       | Location |    Purpose     | Location |
          |---------------------+----------+----------------+----------|
          |   100-pin serial    |   CN1    | 8-port upgrade |   CN3    |
          | interface connector |          | card connector |          |
          |---------------------+----------+----------------+----------|
          | 8-port upgrade card |   CN2    |                |          |
          |      connector      |          |                |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               RS-232/RS-422 SELECT - JP1-JP8               |
          |------------------------------------------------------------|
          |  Setting   |   Jumper A   | Jumper B | Jumper C | Jumper D |
          |------------+--------------+----------+----------+----------|
          | » | RS-232 |  Pins 1 & 2  | Pins 1 & | Pins 1 & | Pins 1 & |
          |   |        |    closed    | 2 closed | 2 closed | 2 closed |
          |---+--------+--------------+----------+----------+----------|
          |   | RS-422 |  Pins 2 & 3  | Pins 2 & | Pins 2 & | Pins 2 & |
          |   |        |    closed    | 3 closed | 3 closed | 3 closed |
          |------------------------------------------------------------|
          | Note:JP1-JP8 correspond to serial ports 1 - 8,             |
          | respectively. Jumper D does not exist on JP5-JP8.          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               PORT 1 FULL/HALF DUPLEX SELECT               |
          |------------------------------------------------------------|
          |            Setting            |            FD1             |
          |-------------------------------+----------------------------|
          |       Half-duplex mode        |     Pins 1 & 2 closed      |
          |-------------------------------+----------------------------|
          |    Full-duplex mode (DMA1)    |     Pins 2 & 3 closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               PORT 2 FULL/HALF DUPLEX SELECT               |
          |------------------------------------------------------------|
          |            Setting            |            FD2             |
          |-------------------------------+----------------------------|
          |       Half-duplex mode        |     Pins 1 & 2 closed      |
          |-------------------------------+----------------------------|
          |    Full-duplex mode (DMA2)    |     Pins 2 & 3 closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |  PORTS 1 & 2 RS-232 SYNCHRONOUS/ASYNCHRONOUS SELECT -  |
          |                            JP9                             |
          |------------------------------------------------------------|
          |    Setting     | Jumper A - Jumper E | Jumper F - Jumper M |
          |----------------+---------------------+---------------------|
          |  Asynchronous  |  Pins 1 & 2 closed  |  Pins 1 & 2 closed  |
          |----------------+---------------------+---------------------|
          |  Synchronous   |  Pins 2 & 3 closed  |  Pins 1 & 2 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          PORT 1 DATA TERMINAL READY (DTR) OPTIONS          |
          |------------------------------------------------------------|
          |        Setting         |      JP14       |      JP15       |
          |------------------------+-----------------+-----------------|
          | » |   Normal RS-232    |     Closed      |      Open       |
          |---+--------------------+-----------------+-----------------|
          |   | Synchronous RS-232 |      Open       |     Closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          PORT 2 DATA TERMINAL READY (DTR) OPTIONS          |
          |------------------------------------------------------------|
          |        Setting         |      JP16       |      JP17       |
          |------------------------+-----------------+-----------------|
          | » |   Normal RS-232    |     Closed      |      Open       |
          |---+--------------------+-----------------+-----------------|
          |   | Synchronous RS-232 |      Open       |     Closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        I/O ADDRESS                         |
          |------------------------------------------------------------|
          |     Setting     |    SW1/1     |    SW1/2    |    SW1/3    |
          |-----------------+--------------+-------------+-------------|
          | » |    218h     |     Off      |     Off     |     Off     |
          |---+-------------+--------------+-------------+-------------|
          |   |    21Ch     |      On      |     Off     |     Off     |
          |---+-------------+--------------+-------------+-------------|
          |   |    238h     |     Off      |     On      |     Off     |
          |---+-------------+--------------+-------------+-------------|
          |   |    23Ch     |      On      |     On      |     Off     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |         Memory Size          |           Bank 0            |
          |------------------------------+-----------------------------|
          | »  |          128KB          |         (2) 64K x 9         |
          |----+-------------------------+-----------------------------|
          |    |           2MB           |         (2) 1M x 9          |
          +------------------------------------------------------------+