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       # ABC COMPUTER COMPANY, LTD.
       
          ETHERNET A3251
       
          NIC Type         Ethernet                                      
          Transfer Rate    10Mbps                                        
          Data Bus         16-bit ISA                                    
          Topology         Linear Bus                                    
          Wiring Type      RG-58A/U 50ohm coaxial                        
                                                                         
                           AUI transceiver via DB-15 port                
          Boot ROM         Available                                     
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                     INTERRUPT REQUEST                      |
          |------------------------------------------------------------|
          |    IRQ    |    JP6     |    JP7    |    JP8    |    JP9    |
          |-----------+------------+-----------+-----------+-----------|
          |   |   2   |   Closed   |   Open    |   Open    |   Open    |
          |---+-------+------------+-----------+-----------+-----------|
          | » |   3   |    Open    |  Closed   |   Open    |   Open    |
          |---+-------+------------+-----------+-----------+-----------|
          |   |   4   |    Open    |   Open    |  Closed   |   Open    |
          |---+-------+------------+-----------+-----------+-----------|
          |   |   5   |    Open    |   Open    |   Open    |  Closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          BOOT ROM                          |
          |------------------------------------------------------------|
          |            Type            |              JP1              |
          |----------------------------+-------------------------------|
          | » |        Enabled         |       Pins 1 & 2 Closed       |
          |---+------------------------+-------------------------------|
          |   |        Disabled        |       Pins 2 & 3 Closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CABLE TYPE                         |
          |------------------------------------------------------------|
          |            Type            | JP10 - JP13 & | JP16 - JP18 & |
          |                            |     JP15      |  JP20 - JP21  |
          |----------------------------+---------------+---------------|
          | » | RG-58A/U 50ohm coaxial |    Closed     |     Open      |
          |---+------------------------+---------------+---------------|
          |   |  AUI transceiver via   |     Open      |    Closed     |
          |   |       DB-15 port       |               |               |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      I/O BASE ADDRESS                      |
          |------------------------------------------------------------|
          |  I/O Address   |  SW1/1   |  SW1/2   |  SW1/3   |  SW1/4   |
          |----------------+----------+----------+----------+----------|
          |   |  280-29F   |    On    |    On    |    On    |    On    |
          |---+------------+----------+----------+----------+----------|
          | » |  2A0-2BF   |    On    |   Off    |    On    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   |  2C0-2DF   |    On    |    On    |   Off    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   |  2E0-2FF   |    On    |   Off    |   Off    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   |  300-31F   |    On    |    On    |    On    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   |  320-33F   |    On    |   Off    |    On    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   |  340-35F   |    On    |    On    |   Off    |   Off    |
          |---+------------+----------+----------+----------+----------|
          |   |  360-37F   |    On    |   Off    |   Off    |   Off    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    BASE MEMORY ADDRESS                     |
          |------------------------------------------------------------|
          |      Base Address      |      SW1/5      |      SW1/6      |
          |------------------------+-----------------+-----------------|
          |   |    C0000-C3FFF     |       On        |       On        |
          |---+--------------------+-----------------+-----------------|
          |   |    C4000-C7FFF     |       Off       |       On        |
          |---+--------------------+-----------------+-----------------|
          |   |    C8000-CBFFF     |       On        |       Off       |
          |---+--------------------+-----------------+-----------------|
          | » |    CC000- CFFFF    |       Off       |       Off       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    MISCELLANEOUS NOTES                     |
          |------------------------------------------------------------|
          | Different drivers must be used for the National & the      |
          | Fujitsu chipset cards, & are not interchangeable. Fujitsu  |
          | adapters may be used for either 8 or 16 bit Fujitsu cards. |
          | While the National chipset cards require a different       |
          | driver for an 8 or 16 bit card.                            |
          +------------------------------------------------------------+