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       # ZENITH DATA SYSTEMS
       
          LAN16TR-AT
       
          NIC Type         Token-Ring                                    
          Transfer Rate    4/16Mbps                                      
          Data Bus         16-bit ISA                                    
          Topology         Ring                                          
          Wiring Type      Unshielded twisted pair                       
                                                                         
                           Shielded twisted pair                         
          Boot ROM         Available                                     
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                FACTORY CONFIGURED SETTINGS                 |
          |------------------------------------------------------------|
          |            Jumper            |           Setting           |
          |------------------------------+-----------------------------|
          |             JP1              |           Unused            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      I/O BASE ADDRESS                      |
          |------------------------------------------------------------|
          |      Address       |       SW1/1       |       SW1/2       |
          |--------------------+-------------------+-------------------|
          |     A00 - A0Fh     |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |     A20 - A2Fh     |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |     A40 - A4Fh     |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |     A60 - A6Fh     |        Off        |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     INTERRUPT REQUEST                      |
          |------------------------------------------------------------|
          |       IRQ        |       SW1/3        |       SW1/4        |
          |------------------+--------------------+--------------------|
          |        3         |         On         |         On         |
          |------------------+--------------------+--------------------|
          |        9         |        Off         |         On         |
          |------------------+--------------------+--------------------|
          |        10        |         On         |        Off         |
          |------------------+--------------------+--------------------|
          |        11        |        Off         |        Off         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      BOOT ROM ADDRESS                      |
          |------------------------------------------------------------|
          |      Address       |       SW1/5       |       SW1/6       |
          |--------------------+-------------------+-------------------|
          |   CC000 - CFFFFh   |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |   D0000 - D3FFFh   |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |   D8000 - D8FFFh   |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |   DC000 - DFFFFh   |        Off        |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DMA CHANNEL                         |
          |------------------------------------------------------------|
          |      Channel       |       SW1/7       |       SW1/8       |
          |--------------------+-------------------+-------------------|
          |        DMA0        |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |        DMA5        |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |        DMA6        |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |        DMA7        |        Off        |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          BOOT ROM                          |
          |------------------------------------------------------------|
          |             Setting             |          SW1/9           |
          |---------------------------------+--------------------------|
          | » |          Disabled           |            On            |
          |---+-----------------------------+--------------------------|
          |   |           Enabled           |           Off            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   NETWORK SEGMENT SPEED                    |
          |------------------------------------------------------------|
          |              Speed              |          SW1/10          |
          |---------------------------------+--------------------------|
          |              4Mbps              |           Off            |
          |---------------------------------+--------------------------|
          |             16Mbps              |            On            |
          |------------------------------------------------------------|
          | Note:All cards on the network segment must have this       |
          | option set the same.                                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  LLC EPROM CONFIGURATION                   |
          |------------------------------------------------------------|
          |                Setting                 |      SW1/11       |
          |----------------------------------------+-------------------|
          | »           |      ROM-based LLC       |        On         |
          |-------------+--------------------------+-------------------|
          |             |      RAM-based LLC       |        Off        |
          |------------------------------------------------------------|
          | Note:The LLC EPROMs contain the Logic Link Control         |
          | program. With the LLC ROMs disabled, the LLC logic can be  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CABLE TYPE                         |
          |------------------------------------------------------------|
          |                  Type                  |      SW1/12       |
          |----------------------------------------+-------------------|
          |  Unshielded twisted pair (RJ-45 Jack)  |        Off        |
          |----------------------------------------+-------------------|
          | Shielded twisted pair (DB-9 Connector) |        On         |
          +------------------------------------------------------------+