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       # GATEWAY COMMUNICATIONS, INC.
       
          G/ETHERTWIST AT, AT-WS ADAPTER (NATIONAL CHIPSET)
       
          NIC Type         Ethernet                                      
          Transfer Rate    10Mbps                                        
          Data Bus         16-bit ISA                                    
          Topology         Star                                          
          Wiring Type      Shielded twisted pair                         
                                                                         
                           Unshielded twisted pair                       
                                                                         
                           AUI transceiver via DB-15 port                
          Boot ROM         Available                                     
       
 (IMG) IMG 1
          
       
       +--------------------------------------------------------------------------+
       |                            INTERRUPT REQUEST                             |
       |--------------------------------------------------------------------------|
       |IRQ | JP3  | JP4  | JP5  | JP6  | JP7  | JP8  | JP9  | JP10 | JP11 | JP12 |
       |----+------+------+------+------+------+------+------+------+------+------|
       |»|3 | Open | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |15|Closed| Open | Open | Open | Open | Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |12| Open |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |11| Open | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |10| Open | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |7 | Open | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |6 | Open | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |5 | Open | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |4 | Open | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
       |-+--+------+------+------+------+------+------+------+------+------+------|
       | |2 | Open | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
       +--------------------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      I/O BASE ADDRESS                      |
          |------------------------------------------------------------|
          |    Address     |  SW1/1   |  SW1/2   |  SW1/3   |  SW1/4   |
          |----------------+----------+----------+----------+----------|
          | » |  2A0-2BF   |    On    |   Off    |    On    |    On    |
          |---+------------+----------+----------+----------+----------|
          |   |  280-29F   |    On    |    On    |    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   |   Off    |    On    |   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       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    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.                                                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       COMPATIBILITY                        |
          |------------------------------------------------------------|
          |               Mode                |          JP2           |
          |-----------------------------------+------------------------|
          | »      |     Compatibility on     |   Pins 1 & 2 Closed    |
          |--------+--------------------------+------------------------|
          |        |    Compatibility off     |   Pins 2 & 3 Closed    |
          |------------------------------------------------------------|
          | Note: If one of the following problems presist after       |
          | checking all other possibilities turn off Compatibility:   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CABLE TYPE                         |
          |------------------------------------------------------------|
          |        Type         | JP8  | JP9  |JP10 |JP11 |JP12 | JP13 |
          |---------------------+------+------+-----+-----+-----+------|
          | |AUI transceiver via|Pins 2|Pins 2|Pins |Pins |Pins |Closed|
          | |    DB-15 port     | & 3  | & 3  |2 & 3|2 & 3|2 & 3|      |
          |-+-------------------+------+------+-----+-----+-----+------|
          |»|Shielded/Unshielded|Pins 1|Pins 1|Pins |Pins |Pins | Open |
          | |   twisted pair    | & 2  | & 2  |1 & 2|1 & 2|1 & 2|      |
          |------------------------------------------------------------|
          |Note: Pins designated should be in the closed position.     |
          +------------------------------------------------------------+
       
 (IMG) IMG 2
          
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |           Status           |           Condition           |
          |----------------------------+-------------------------------|
          |  Jabber LED (1) on (Red)   |    Adapter is continually     |
          |                            |      sending random data      |
          |----------------------------+-------------------------------|
          | Link test LED (2) on (Red) |    Network connection good    |
          |----------------------------+-------------------------------|
          |  Transmit LED (3) blinks   |   Data is being transmitted   |
          |           (Red)            |                               |
          |----------------------------+-------------------------------|
          |  Receive LED (4) on (Red)  |    Data is being received     |
          |------------------------------------------------------------|
          | Note: When using the AUI port, the LEDs are not            |
          | functional.                                                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    MISCELLANEOUS NOTES                     |
          |------------------------------------------------------------|
          | The AT adapter can be used in a file server or a work      |
          | station.                                                   |
          |                                                            |
          | The AT-WS adapter can be used in a work station only.      |
          |                                                            |
          | Different drivers must be used for the National & the      |
          | Fujitsu chipset cards, they are not interchangeable.       |
          | Fujitsu drivers 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.                  |
          +------------------------------------------------------------+