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       # SEA LEVEL SYSTEMS, INC.
       
          ACB-530
       
          Card Type           Serial card                                
          Chip Set            Unidentified                               
          I/O Options         Serial port                                
          Data Bus            16-bit ISA                                 
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |           Function            |           Label            |
          |-------------------------------+----------------------------|
          | Serial port                   |             P1             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function               | Label |   Position   |
          |-------------------------------------+-------+--------------|
          | » | Factory configured – do not     |  E2   | Unidentified |
          |   | alter                           |       |              |
          |---+---------------------------------+-------+--------------|
          | » | Factory configured – do not     |  E9   | Unidentified |
          |   | alter                           |       |              |
          |---+---------------------------------+-------+--------------|
          | » | Factory configured – do not     | SW1/8 | Unidentified |
          |   | alter                           |       |              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SERIAL PORT INTERRUPT SELECTION               |
          |------------------------------------------------------------|
          |            IRQ             |              E3               |
          |----------------------------+-------------------------------|
          |    |           2           |       Pins 1 & 2 closed       |
          |----+-----------------------+-------------------------------|
          |    |           3           |       Pins 3 & 4 closed       |
          |----+-----------------------+-------------------------------|
          |    |           4           |       Pins 5 & 6 closed       |
          |----+-----------------------+-------------------------------|
          | »  |           5           |       Pins 7 & 8 closed       |
          |----+-----------------------+-------------------------------|
          |    |           7           |      Pins 9 & 10 closed       |
          |----+-----------------------+-------------------------------|
          |    |          10           |      Pins 11 & 12 closed      |
          |----+-----------------------+-------------------------------|
          |    |          11           |      Pins 13 & 14 closed      |
          |----+-----------------------+-------------------------------|
          |    |          12           |      Pins 15 & 16 closed      |
          |----+-----------------------+-------------------------------|
          |    |          15           |      Pins 17 & 18 closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            SERIAL PORT INTERRUPT MODE SELECTION            |
          |------------------------------------------------------------|
          |            Setting            |             E1             |
          |-------------------------------+----------------------------|
          |    DMA terminal count IRQ     |     Pins 1 & 2 closed      |
          |-------------------------------+----------------------------|
          |          Single IRQ           |     Pins 3 & 4 closed      |
          |-------------------------------+----------------------------|
          |          Shared IRQ           |     Pins 5 & 6 closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 BASE I/O ADDRESS SELECTION                 |
          |------------------------------------------------------------|
          | Setting | SW1/1 | SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |
          |---------+-------+-------+------+------+------+------+------|
          |» | 238  |  Off  |  On   |  On  |  On  | Off  | Off  | Off  |
          |--+------+-------+-------+------+------+------+------+------|
          |  | 280  |  Off  |  On   | Off  |  On  |  On  |  On  |  On  |
          |--+------+-------+-------+------+------+------+------+------|
          |  | 2A0  |  Off  |  On   | Off  |  On  | Off  |  On  |  On  |
          |--+------+-------+-------+------+------+------+------+------|
          |  | 2E8  |  Off  |  On   | Off  | Off  | Off  |  On  | Off  |
          |--+------+-------+-------+------+------+------+------+------|
          |  | 300  |  Off  |  Off  |  On  |  On  |  On  |  On  |  On  |
          |--+------+-------+-------+------+------+------+------+------|
          |  | 328  |  Off  |  Off  |  On  |  On  | Off  |  On  | Off  |
          |--+------+-------+-------+------+------+------+------+------|
          |  | 3E8  |  Off  |  Off  | Off  | Off  | Off  |  On  | Off  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       DMA SELECTION                        |
          |------------------------------------------------------------|
          |            Setting            |             E2             |
          |-------------------------------+----------------------------|
          |  Software enabled channel A   |     Pins 1 & 2 closed      |
          |-------------------------------+----------------------------|
          |   Channel A always enabled    |     Pins 3 & 4 closed      |
          |-------------------------------+----------------------------|
          |     No DMA for channel A      |     Pins 5 & 6 closed      |
          |-------------------------------+----------------------------|
          |  Software enabled channel B   |     Pins 7 & 8 closed      |
          |-------------------------------+----------------------------|
          |   Channel B always enabled    |     Pins 9 & 10 closed     |
          |-------------------------------+----------------------------|
          |     No DMA for channel B      |    Pins 11 & 12 closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |        DMA SELECTION (SINGLE CHANNEL A HALF DUPLEX)        |
          |------------------------------------------------------------|
          |               Setting               |  E4  |      E5       |
          |-------------------------------------+------+---------------|
          |  Channel A/channel 0, half duplex   | Open | 1 & 2, 3 & 4  |
          |          channel B no DMA           |      |               |
          |-------------------------------------+------+---------------|
          |  Channel A/channel 1, half duplex   | Open | 5 & 6, 7 & 8  |
          |          channel B no DMA           |      |               |
          |-------------------------------------+------+---------------|
          |  Channel A/channel 2, half duplex   | Open | 9 & 10, 11 &  |
          |          channel B no DMA           |      |      12       |
          |-------------------------------------+------+---------------|
          |  Channel A/channel 3, half duplex   | Open | 13 & 14, 15 & |
          |          channel B no DMA           |      |      16       |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |        DMA SELECTION (SINGLE CHANNEL B HALF DUPLEX)        |
          |------------------------------------------------------------|
          |               Setting               |  E6  |      E7       |
          |-------------------------------------+------+---------------|
          |  Channel B/channel 0, half duplex   | Open | 1 & 2, 3 & 4  |
          |          channel A no DMA           |      |               |
          |-------------------------------------+------+---------------|
          |  Channel B/channel 1, half duplex   | Open | 5 & 6, 7 & 8  |
          |          channel A no DMA           |      |               |
          |-------------------------------------+------+---------------|
          |  Channel B/channel 2, half duplex   | Open | 9 & 10, 11 &  |
          |          channel A no DMA           |      |      12       |
          |-------------------------------------+------+---------------|
          |  Channel B/channel 3, half duplex   | Open | 13 & 14, 15 & |
          |          channel A no DMA           |      |      16       |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          DMA SELECTION (TWO CHANNELS HALF DUPLEX)          |
          |------------------------------------------------------------|
          |        Setting        |  E4  |   E5   |  E6  |     E7      |
          |-----------------------+------+--------+------+-------------|
          | Channel A/channel 1,  | Open | 5 & 6, | Open | 13 & 14, 15 |
          |      half duplex      |      | 7 & 8  |      |    & 16     |
          |-----------------------+------+--------+------+-------------|
          | Channel B/channel 3,  | Open | 5 & 6, | Open | 13 & 14, 15 |
          |      half duplex      |      | 7 & 8  |      |    & 16     |
          |-----------------------+------+--------+------+-------------|
          | Channel A/channel 0,  | Open | 1 & 2, | Open | 9 & 10, 11  |
          |      half duplex      |      | 3 & 4  |      |    & 12     |
          |-----------------------+------+--------+------+-------------|
          | Channel B/channel 2,  | Open | 1 & 2, | Open | 9 & 10, 11  |
          |      half duplex      |      | 3 & 4  |      |    & 12     |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |         DMA SELECTION (FOUR CHANNELS FULL DUPLEX)          |
          |------------------------------------------------------------|
          |      Setting      |    E4     |   E5   |    E6    |   E7   |
          |-------------------+-----------+--------+----------+--------|
          | Channel A/channel | 13 & 14,  | 5 & 6, | 9 & 10,  | 1 & 2, |
          |  1, receive data  |  15 & 16  | 7 & 8  | 11 & 12  | 3 & 4  |
          |-------------------+-----------+--------+----------+--------|
          | Channel A/channel | 13 & 14,  | 5 & 6, | 9 & 10,  | 1 & 2, |
          | 3, transmit data  |  15 & 16  | 7 & 8  | 11 & 12  | 3 & 4  |
          |-------------------+-----------+--------+----------+--------|
          | Channel B/channel | 13 & 14,  | 5 & 6, | 9 & 10,  | 1 & 2, |
          |    0, receive     |  15 & 16  | 7 & 8  | 11 & 12  | 3 & 4  |
          |-------------------+-----------+--------+----------+--------|
          | Channel B/channel | 13 & 14,  | 5 & 6, | 9 & 10,  | 1 & 2, |
          |    2, transmit    |  15 & 16  | 7 & 8  | 11 & 12  | 3 & 4  |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           DMA SELECTION (CHANNEL A FULL DUPLEX)            |
          |------------------------------------------------------------|
          |         Setting          |        E4        |      E5      |
          |--------------------------+------------------+--------------|
          |   Channel A/channel 1,   | 13 & 14, 15 & 16 | 5 & 6, 7 & 8 |
          |       receive data       |                  |              |
          |--------------------------+------------------+--------------|
          |   Channel A/channel 3,   | 13 & 14, 15 & 16 | 5 & 6, 7 & 8 |
          |      transmit data       |                  |              |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           DMA SELECTION (CHANNEL B FULL DUPLEX)            |
          |------------------------------------------------------------|
          |         Setting          |        E6        |      E7      |
          |--------------------------+------------------+--------------|
          |   Channel B/channel 1,   | 13 & 14, 15 & 16 | 5 & 6, 7 & 8 |
          |       receive data       |                  |              |
          |--------------------------+------------------+--------------|
          |   Channel B/channel 3,   | 13 & 14, 15 & 16 | 5 & 6, 7 & 8 |
          |      transmit data       |                  |              |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              DMA SELECTION (NO DMA SELECTED)               |
          |------------------------------------------------------------|
          |  Setting   |    E4     |    E5     |    E6     |    E7     |
          |------------+-----------+-----------+-----------+-----------|
          |   No DMA   |   Open    |   Open    |   Open    |   Open    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  TRANSMIT CLOCK SELECTION                  |
          |------------------------------------------------------------|
          |             Setting             |            E8            |
          |---------------------------------+--------------------------|
          | Channel A RTS enabled (RS-485)  |    Pins 1 & 2 closed     |
          |---------------------------------+--------------------------|
          | Transmit clock output channel A |    Pins 3 & 4 closed     |
          |---------------------------------+--------------------------|
          | Transmit clock input channel A  |    Pins 5 & 6 closed     |
          |---------------------------------+--------------------------|
          | Channel B RTS enabled (RS-485)  |    Pins 7 & 8 closed     |
          |---------------------------------+--------------------------|
          | Transmit clock output channel B |    Pins 9 & 10 closed    |
          |---------------------------------+--------------------------|
          | Transmit clock input channel B  |   Pins 11 & 12 closed    |
          +------------------------------------------------------------+