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       # GATEWAY COMMUNICATIONS, INC.
       
          G/EtherTwist 16 Adapter (NATIONAL CHIPSET)
       
          NIC Type         Ethernet                                      
          Transfer Rate    10Mbps                                        
          Data Bus         16-bit ISA                                    
          Topology         Star                                          
                                                                         
                           Linear Bus                                    
          Wiring Type      Shielded/Unshielded twisted pair              
                                                                         
                           AUI transceiver via DB-15 port                
          Boot ROM         Available                                     
       
 (IMG) IMG 1
          
       
       +--------------------------------------------------------------------------+
       |                            INTERRUPT REQUEST                             |
       |--------------------------------------------------------------------------|
       |IRQ | JP1  | JP2  | JP3  | JP4  | JP5  | JP6  | JP7  | JP8  | JP9  | JP10 |
       |----+------+------+------+------+------+------+------+------+------+------|
       | |2 |Closed| Open | Open | Open | Open | Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       |»|3 | Open |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |4 | Open | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |5 | Open | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |6 | Open | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |7 | Open | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |10| Open | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |11| Open | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |12| Open | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |15| Open | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
       +--------------------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    LINK INTEGRITY TEST                     |
          |------------------------------------------------------------|
          |           Setting           |             JP31             |
          |-----------------------------+------------------------------|
          | »        |     Enabled      |      Pins 1 & 2 Closed       |
          |----------+------------------+------------------------------|
          |          |     Disabled     |      Pins 2 & 3 Closed       |
          |------------------------------------------------------------|
          | Note:Link Integrity is only used with 10Base-T wiring.     |
          | When using an AUI transciever, the test should be          |
          | disabled.                                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      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       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CABLE TYPE                         |
          |------------------------------------------------------------|
          |               Type                |          JP13          |
          |-----------------------------------+------------------------|
          |   | AUI transeiver via DB-15 port |   Pins 2 & 3 Closed    |
          |---+-------------------------------+------------------------|
          | » |    Unshielded twisted pair    |   Pins 1 & 2 Closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     COMPATIBILITY MODE                     |
          |------------------------------------------------------------|
          |               Mode                |          JP11          |
          |-----------------------------------+------------------------|
          | »      |     Compatibility on     |   Pins 1 & 2 Closed    |
          |--------+--------------------------+------------------------|
          |        |    Compatibility off     |   Pins 2 & 3 Closed    |
          |------------------------------------------------------------|
          | Note: If one of the following problems persist after       |
          | checking all other possibilities turn off Compatibility.   |
          |                                                            |
          | Intermittent failures when booting, system lock up, or     |
          | continuous network error messages.                         |
          +------------------------------------------------------------+
       
 (IMG) IMG 2
          
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |          Status          |            Condition            |
          |--------------------------+---------------------------------|
          | Jabber LED (1) on (Red)  | Adapter is continually sending  |
          |                          |           random data           |
          |--------------------------+---------------------------------|
          |   Link test LED (2) on   |     Network connection good     |
          |         (Green)          |                                 |
          |--------------------------+---------------------------------|
          | Link test LED (2) blinks |   Wiring error, disabled test   |
          |         (Green)          |             jumper              |
          |--------------------------+---------------------------------|
          | Transmit LED (3) blinks  |    Data is being transmitted    |
          |          (Red)           |                                 |
          |--------------------------+---------------------------------|
          |  Receive LED (4) blinks  |     Data is being received      |
          |          (Red)           |                                 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    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.                            |
          +------------------------------------------------------------+