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       # SEALEVEL SYSTEMS, INC.
       
          SIO-485
       
          Card Type               Serial card                            
          Chip Set                Unidentified                           
          Maximum Onboard Memory  Unidentified                           
          I/O Options             Serial port                            
          Hard Drives supported   None                                   
          Floppy drives supported None                                   
          Data Bus                8-bit ISA                              
          Card Size               Half-length, full-height               
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |           Function            |           Label            |
          |-------------------------------+----------------------------|
          | Serial Port 1                 |             J1             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function               |  Label  |  Position  |
          |-------------------------------------+---------+------------|
          |     | RS-485 enabled by RTS         |   E2    |   Closed   |
          |-----+-------------------------------+---------+------------|
          | »   | RS-422/485 always enabled     |   E2    |    Open    |
          |------------------------------------------------------------|
          | Note: For the RS-422 and the RS-485 ports, the RS-422/485  |
          | driver/receiver pair are installed at U6 and U7.           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             BASE I/O ADDRESS SELECTION PORT 1              |
          |------------------------------------------------------------|
          | Setting  |SW1/1 |SW1/2 |SW1/3|SW1/4|SW1/5|SW1/6|SW1/7|SW1/8|
          |----------+------+------+-----+-----+-----+-----+-----+-----|
          | |238h    |  On  | Off  | Off | Off | Off | Off | Off | Off |
          |-+--------+------+------+-----+-----+-----+-----+-----+-----|
          | |2B8h    | Off  |  On  | Off | Off | Off | Off | Off | Off |
          |-+--------+------+------+-----+-----+-----+-----+-----+-----|
          | |338h    | Off  | Off  | On  | Off | Off | Off | Off | Off |
          |-+--------+------+------+-----+-----+-----+-----+-----+-----|
          | |3B8h    | Off  | Off  | Off | On  | Off | Off | Off | Off |
          |-+--------+------+------+-----+-----+-----+-----+-----+-----|
          | |278h    | Off  | Off  | Off | Off | On  | Off | Off | Off |
          |-+--------+------+------+-----+-----+-----+-----+-----+-----|
          | |2F8h    | Off  | Off  | Off | Off | Off | On  | Off | Off |
          |-+--------+------+------+-----+-----+-----+-----+-----+-----|
          | |378h    | Off  | Off  | Off | Off | Off | Off | On  | Off |
          |-+--------+------+------+-----+-----+-----+-----+-----+-----|
          |»|3F8h    | Off  | Off  | Off | Off | Off | Off | Off | On  |
          |-+--------+------+------+-----+-----+-----+-----+-----+-----|
          | |Disabled| Off  | Off  | Off | Off | Off | Off | Off | Off |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             SERIAL PORT 1 INTERRUPT SELECTION              |
          |------------------------------------------------------------|
          |       IRQ        |   E1/Pins 1 & 2   |    E1/Pins 2 & 3    |
          |------------------+-------------------+---------------------|
          |   | IRQ3         |      Closed       |       Closed        |
          |---+--------------+-------------------+---------------------|
          | » | IRQ4         |       Open        |       Closed        |
          |---+--------------+-------------------+---------------------|
          |   | None         |       Open        |        Open         |
          +------------------------------------------------------------+