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       # ZENITH DATA SYSTEMS
       
          LAN4TR-XT
       
          NIC Type         Token-Ring                                    
          Transfer Rate    4Mbps                                         
          Data Bus         8-bit ISA                                     
          Topology         Ring                                          
          Wiring Type      Shielded/Unshielded twisted pair              
          Boot ROM         Available                                     
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                      I/O BASE ADDRESS                      |
          |------------------------------------------------------------|
          |              Address              |          JP2           |
          |-----------------------------------+------------------------|
          | » |         0A20 - 0A2Fh          |         Closed         |
          |---+-------------------------------+------------------------|
          |   |         0A60 - 0A6Fh          |          Open          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     INTERRUPT REQUEST                      |
          |------------------------------------------------------------|
          |             IRQ              |             JP3             |
          |------------------------------+-----------------------------|
          | »  |            2            |           Closed            |
          |----+-------------------------+-----------------------------|
          |    |            3            |            Open             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      BOOT ROM ADDRESS                      |
          |------------------------------------------------------------|
          |    ROM Address     | Data Memory (Buffer) Address |  JP4   |
          |--------------------+------------------------------+--------|
          | » | CC000 - CDFFFh |        CE000 - DDFFFh        | Closed |
          |---+----------------+------------------------------+--------|
          |   | DC000 - DDFFFh |        DE000 - DFFFFh        |  Open  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     LLC EPROM ENABLED                      |
          |------------------------------------------------------------|
          |                   Setting                    |     JP5     |
          |----------------------------------------------+-------------|
          | »      |      External EPROMs disabled       |   Closed    |
          |--------+-------------------------------------+-------------|
          |        |       External EPROMs enabled       |    Open     |
          |------------------------------------------------------------|
          | Note:The LLC EPROMs contain the Logic Link Control         |
          | program. The card will function properly with the LLC      |
          | chips                                                      |
          +------------------------------------------------------------+