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       # OCEAN INFORMATION SYSTEMS, INC.
       
          ETHERNET-2100 REV. 1.0
       
          NIC Type:           Ethernet                                   
          Transfer Rate:      10Mbps                                     
          Data Bus:           16-bit ISA                                 
          Topology:           Linear Bus                                 
          Wiring Type         AUI transceiver via DB-15 port             
                                                                         
                              RG58A/U 50ohm coaxial                      
          Boot ROM            Available                                  
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                         WAIT STATE                         |
          |------------------------------------------------------------|
          |              Setting              |           W1           |
          |-----------------------------------+------------------------|
          | » |         0 wait state          |          Open          |
          |---+-------------------------------+------------------------|
          |   |         1 wait state          |         Closed         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CABLE TYPE                         |
          |------------------------------------------------------------|
          |                Type                |         W2-W9         |
          |------------------------------------+-----------------------|
          | » |     RG-58A/U 50ohm coaxial     |   Pins 2 & 3 closed   |
          |---+--------------------------------+-----------------------|
          |   | AUI transceiver via DB-15 port |   Pins 1 & 2 closed   |
          +------------------------------------------------------------+
       
          +---------------------------------------------------------------+
          |                          DMA CHANNEL                          |
          |---------------------------------------------------------------|
          |Channel| W10  | W11  | W12  | W13  | W14  | W15  | W16  | W17  |
          |-------+------+------+------+------+------+------+------+------|
          |»  |DMA| Open |Closed| Open | Open | Open |Closed| Open | Open |
          |   | 5 |      |      |      |      |      |      |      |      |
          |---+---+------+------+------+------+------+------+------+------|
          |   |DMA|Closed| Open | Open | Open |Closed| Open | Open | Open |
          |   | 3 |      |      |      |      |      |      |      |      |
          |---+---+------+------+------+------+------+------+------+------|
          |   |DMA| Open | Open |Closed| Open | Open | Open |Closed| Open |
          |   | 6 |      |      |      |      |      |      |      |      |
          |---+---+------+------+------+------+------+------+------+------|
          |   |DMA| Open | Open | Open |Closed| Open | Open | Open |Closed|
          |   | 7 |      |      |      |      |      |      |      |      |
          +---------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          BOOT ROM                          |
          |------------------------------------------------------------|
          |             Setting             |           W18            |
          |---------------------------------+--------------------------|
          | » |          Disabled           |           Open           |
          |---+-----------------------------+--------------------------|
          |   |           Enabled           |          Closed          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              I/O ADDRESS AND BOOT ROM ADDRESS              |
          |------------------------------------------------------------|
          |   I/O Address   | Boot ROM Address |    W19    |    W20    |
          |-----------------+------------------+-----------+-----------|
          | »   |   300h    |      C8000h      |  Closed   |  Closed   |
          |-----+-----------+------------------+-----------+-----------|
          |     |   320h    |      CC000h      |  Closed   |   Open    |
          |-----+-----------+------------------+-----------+-----------|
          |     |   340h    |      D0000h      |   Open    |  Closed   |
          |-----+-----------+------------------+-----------+-----------|
          |     |   360h    |      D4000h      |   Open    |   Open    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     INTERRUPT REQUEST                      |
          |------------------------------------------------------------|
          |     IRQ     |    W21    |    W22    |    W23    |   W24    |
          |-------------+-----------+-----------+-----------+----------|
          | » |  IRQ3   |   Open    |  Closed   |   Open    |   Open   |
          |---+---------+-----------+-----------+-----------+----------|
          |   |  IRQ4   |   Open    |   Open    |  Closed   |   Open   |
          |---+---------+-----------+-----------+-----------+----------|
          |   |  IRQ5   |   Open    |   Open    |   Open    |  Closed  |
          |---+---------+-----------+-----------+-----------+----------|
          |   |  IRQ9   |  Closed   |   Open    |   Open    |   Open   |
          +------------------------------------------------------------+