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       # 3COM CORPORATION
       
          TOKENLINK
       
          NIC Type         Token-Ring                                    
          Transfer Rate    4Mbps                                         
          Data Bus         16-bit ISA                                    
          Topology         Ring                                          
          Wiring Type      Unshielded twisted pair                       
                                                                         
                           Shielded twisted pair (DB-9 port)             
          Boot ROM         Available                                     
       
   IMG IMG 1
          
       
          +---------------------------------------------------------------+
          |                          DMA CHANNEL                          |
          |---------------------------------------------------------------|
          |Channel| JP1A | JP1B | JP1C | JP1D | JP1E | JP1F | JP1G | JP1H |
          |-------+------+------+------+------+------+------+------+------|
          |» |DMA3| Open | Open | Open | Open | Open | Open |Closed|Closed|
          |--+----+------+------+------+------+------+------+------+------|
          |  |DMA5| Open | Open | Open | Open |Closed|Closed| Open | Open |
          |--+----+------+------+------+------+------+------+------+------|
          |  |DMA6| Open | Open |Closed|Closed| Open | Open | Open | Open |
          |--+----+------+------+------+------+------+------+------+------|
          |  |DMA7|Closed|Closed| Open | Open | Open | Open | Open | Open |
          +---------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     INTERRUPT REQUEST                      |
          |------------------------------------------------------------|
          | IRQ  |  JP2A  |  JP2B  |  JP2C  |  JP2D  |  JP2E  |  JP2F  |
          |------+--------+--------+--------+--------+--------+--------|
          |»| 5  |  Open  |  Open  |  Open  |  Open  |  Open  | Closed |
          |-+----+--------+--------+--------+--------+--------+--------|
          | | 10 |  Open  |  Open  |  Open  |  Open  | Closed |  Open  |
          |-+----+--------+--------+--------+--------+--------+--------|
          | | 11 |  Open  |  Open  |  Open  | Closed |  Open  |  Open  |
          |-+----+--------+--------+--------+--------+--------+--------|
          | | 12 |  Open  |  Open  | Closed |  Open  |  Open  |  Open  |
          |-+----+--------+--------+--------+--------+--------+--------|
          | | 14 |  Open  | Closed |  Open  |  Open  |  Open  |  Open  |
          |-+----+--------+--------+--------+--------+--------+--------|
          | | 15 | Closed |  Open  |  Open  |  Open  |  Open  |  Open  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      I/O BASE ADDRESS                      |
          |------------------------------------------------------------|
          |   Address   |   JP3A    |   JP3B    |   JP3C    |   JP3D   |
          |-------------+-----------+-----------+-----------+----------|
          | » |  300h   |  Closed   |   Open    |   Open    |   Open   |
          |---+---------+-----------+-----------+-----------+----------|
          |   |  310h   |   Open    |  Closed   |   Open    |   Open   |
          |---+---------+-----------+-----------+-----------+----------|
          |   |  320h   |   Open    |   Open    |  Closed   |   Open   |
          |---+---------+-----------+-----------+-----------+----------|
          |   |  350h   |   Open    |   Open    |   Open    |  Closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   PRIMARY/ALTERNATE MODE                   |
          |------------------------------------------------------------|
          |        Setting         |   JP4A    |   JP4B    |   JP4C    |
          |------------------------+-----------+-----------+-----------|
          | »     |  Single card   |   Open    |   Open    |  Closed   |
          |-------+----------------+-----------+-----------+-----------|
          |       |    Primary     |  Closed   |   Open    |   Open    |
          |-------+----------------+-----------+-----------+-----------|
          |       |   Alternate    |   Open    |  Closed   |   Open    |
          |------------------------------------------------------------|
          | Note: If two cards are to be used in a single system, one  |
          | of the cards must be set to primary and the other one must |
          | be set to alternate. If only one card is used this option  |
          | must be set to single.                                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      BOOT ROM ADDRESS                      |
          |------------------------------------------------------------|
          |    Address     |   JP5A   |   JP5B   |   JP5C   |   JP5D   |
          |----------------+----------+----------+----------+----------|
          | » |  Disabled  |  Closed  |   Open   |   Open   |   Open   |
          |---+------------+----------+----------+----------+----------|
          |   |   C4000h   |   Open   |  Closed  |   Open   |   Open   |
          |---+------------+----------+----------+----------+----------|
          |   |   D4000h   |   Open   |   Open   |   Open   |  Closed  |
          |---+------------+----------+----------+----------+----------|
          |   |   D6000h   |   Open   |   Open   |  Closed  |   Open   |
          +------------------------------------------------------------+