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       # SEALEVEL SYSTEMS, INC.
       
          ACB-V
       
          Card Type           Serial controller                          
          Chip Set            Unidentified                               
          I/O Options         Serial ports (2)                           
          Data Bus            8-bit ISA                                  
          Card Size           Half-length, full-height                   
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Function       | Location |   Function    | Location |
          |----------------------+----------+---------------+----------|
          | Serial port 1        |    P1    | Serial port 2 |    P2    |
          | (Channel A)          |          | (Channel B)   |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    INTERRUPT SELECTION                     |
          |------------------------------------------------------------|
          |    IRQ     |   E3/2    |   E3/3    |   E3/4    |   E3/5    |
          |------------+-----------+-----------+-----------+-----------|
          |    IRQ2    |  Closed   |   Open    |   Open    |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |    IRQ3    |   Open    |  Closed   |   Open    |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |    IRQ4    |   Open    |   Open    |  Closed   |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |   » IRQ5   |   Open    |   Open    |   Open    |  Closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     IRQ MODE SELECTION                     |
          |------------------------------------------------------------|
          |             Setting              |   Label    |  Position  |
          |----------------------------------+------------+------------|
          | Normal mode enabled              |    E3/N    |   Closed   |
          |----------------------------------+------------+------------|
          | Normal mode disabled             |    E3/N    |    Open    |
          |----------------------------------+------------+------------|
          | » Multi mode enabled             |    E3/M    |   Closed   |
          |----------------------------------+------------+------------|
          | Multi mode disabled              |    E3/M    |    Open    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   DMA CHANNEL SELECTION                    |
          |------------------------------------------------------------|
          |    Channel A     |  Channel B  |     E1      |     E2      |
          |------------------+-------------+-------------+-------------|
          |     Disabled     |  Disabled   |    Open     |    Open     |
          |------------------+-------------+-------------+-------------|
          | Ch.1 half-duplex |  Disabled   |  Jumper 4   | Jumpers 4 & |
          |                  |             |   closed    |  6 closed   |
          |------------------+-------------+-------------+-------------|
          | Ch.3 half-duplex |  Disabled   |  Jumper 2   | Jumpers 4 & |
          |                  |             |   closed    |  5 closed   |
          |------------------+-------------+-------------+-------------|
          |     Disabled     |    Ch.1     | Jumpers 3 & |  Jumper 6   |
          |                  | half-duplex |  5 closed   |   closed    |
          |------------------+-------------+-------------+-------------|
          |     Disabled     |    Ch.3     | Jumpers 1 & |  Jumper 5   |
          |                  | half-duplex |  5 closed   |   closed    |
          |------------------+-------------+-------------+-------------|
          | Ch.1 half-duplex |    Ch.3     | Jumpers 1,  | Jumpers 1 & |
          |                  | half-duplex |   4, & 5    |  3 closed   |
          |                  |             |   closed    |             |
          |------------------+-------------+-------------+-------------|
          | Ch.3 half-duplex |    Ch.1     | Jumpers 2,  | Jumpers 1 & |
          |                  | half-duplex |   3, & 5    |  2 closed   |
          |                  |             |   closed    |             |
          |------------------+-------------+-------------+-------------|
          |  Full-duplex -   |  Disabled   | Jumpers 1,  | Jumpers 1 & |
          |  Ch.1 receive &  |             |   4, & 6    |  4 closed   |
          |  Ch.3 transmit   |             |   closed    |             |
          |------------------+-------------+-------------+-------------|
          |  Full-duplex -   |  Disabled   | Jumpers 2,  | Jumpers 1 & |
          |  Ch.3 receive &  |             |   3, & 6    |  4 closed   |
          |  Ch.1 transmit   |             |   closed    |             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 BASE I/O ADDRESS SELECTION                 |
          |------------------------------------------------------------|
          | Setting  | SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |
          |----------+-------+------+------+------+------+------+------|
          |   238h   |  Off  |  On  |  On  |  On  | Off  | Off  | Off  |
          |----------+-------+------+------+------+------+------+------|
          |   280h   |  Off  |  On  | Off  |  On  |  On  |  On  |  On  |
          |----------+-------+------+------+------+------+------+------|
          |   2A0h   |  Off  |  On  | Off  |  On  | Off  |  On  |  On  |
          |----------+-------+------+------+------+------+------+------|
          |   2E8h   |  Off  |  On  | Off  | Off  | Off  |  On  | Off  |
          |----------+-------+------+------+------+------+------+------|
          |   300h   |  Off  | Off  |  On  |  On  |  On  |  On  |  On  |
          |----------+-------+------+------+------+------+------+------|
          |  5500h   |  Off  | Off  | Off  |  On  | Off  | Off  | Off  |
          |----------+-------+------+------+------+------+------+------|
          |  6500h   |  Off  | Off  |  On  | Off  | Off  | Off  | Off  |
          |----------+-------+------+------+------+------+------+------|
          |  7100h   |  Off  |  On  | Off  | Off  | Off  | Off  | Off  |
          |----------+-------+------+------+------+------+------+------|
          |  7300h   |  On   | Off  | Off  | Off  | Off  | Off  | Off  |
          |----------+-------+------+------+------+------+------+------|
          |  7500h   |  Off  | Off  | Off  | Off  | Off  | Off  | Off  |
          |------------------------------------------------------------|
          |     Note:                                                  |
          |                                                            |
          |A total of 255 base address settings are available. The     |
          |switches are a binary representation of the decimal memory  |
          |addresses. SW1/7 is the Most Significant Bit and switch     |
          |SW1/1 is the Least Significant Bit. The switches have the   |
          |following decimal values: SW1/7=16384, SW1/6=8192,          |
          |SW1/5=4096, SW1/4=2048, SW1/3=1024, SW1/2=512, SW1/1=256.   |
          |Turn off the switches and add the values of the switches to |
          |obtain the correct memory address. (Off=1, On=0)            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                EPROM ADDRESS CONFIGURATION                 |
          |------------------------------------------------------------|
          |  Address   |   SW2/1   |   SW2/2   |   SW2/3   |   SW2/4   |
          |------------+-----------+-----------+-----------+-----------|
          |   C000h    |    On     |    On     |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |   C400h    |    On     |    On     |    On     |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |   C800h    |    On     |    On     |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |   D000h    |    On     |    Off    |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |   D400h    |    On     |    Off    |    On     |    Off    |
          |------------+-----------+-----------+-----------+-----------|
          |   D800h    |    On     |    Off    |    Off    |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |   E000h    |    Off    |    On     |    On     |    On     |
          |------------+-----------+-----------+-----------+-----------|
          |   E400h    |    Off    |    On     |    On     |    Off    |
          +------------------------------------------------------------+