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       # SEALEVEL SYSTEMS, INC.
       
          SIO-II
       
          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                 |            CN1             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                Function                | Label | Position  |
          |----------------------------------------+-------+-----------|
          |   | RS-485 enabled by RTS              |  E2   |  Closed   |
          |---+------------------------------------+-------+-----------|
          |   | RS-485 always enabled              |  E2   |   Open    |
          |---+------------------------------------+-------+-----------|
          |   | RS-232 with U7 & U11 installed     |  E5   | Pins 2 &  |
          |   |                                    |       | 3 closed  |
          |---+------------------------------------+-------+-----------|
          | » | RS-422/485 with U6 & U7 installed  |  E5   | Pins 2 &  |
          |   |                                    |       | 3 closed  |
          |---+------------------------------------+-------+-----------|
          |   | Current Loop with U6 & U7          |  E5   | Pins 1 &  |
          |   | installed                          |       | 2 closed  |
          |------------------------------------------------------------|
          | Note: For the RS-422, the RS-485, and the Current loop,    |
          | the RS-422/485 driver/receiver pair are installed at U6    |
          | and U7. For the RS-232, U6 and U7 must be removed and the  |
          | RS-232 driver/receiver pair are installed at locations U17 |
          | and U11.                                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             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  |     E9     |
          |--------------+---------------+----------------+------------|
          |   |   IRQ3   |    Closed     |     Closed     |    Open    |
          |---+----------+---------------+----------------+------------|
          | » |   IRQ4   |     Open      |     Closed     |    Open    |
          |---+----------+---------------+----------------+------------|
          |   |   IRQ5   |     Open      |      Open      |   Closed   |
          |---+----------+---------------+----------------+------------|
          |   |   None   |     Open      |      Open      |    Open    |
          +------------------------------------------------------------+