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       # TIARA COMPUTER SYSTEMS, INC.
       
          ETHERTREK NETWORK ADAPTER JUMPER VERSION
       
          NIC Type         Ethernet                                      
          Transfer Rate    10Mbps                                        
          Data Bus         16-bit ISA                                    
          Topology         Linear Bus/Star                               
          Wiring Type      Unshielded twisted pair                       
                                                                         
                           AUI Transceiver via DB-15 port                
                                                                         
                           RG-58A/U 50ohm coaxial                        
          Boot ROM         Available                                     
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                    CABLE TYPE SELECTION                    |
          |------------------------------------------------------------|
          |        Cable Type        | JP2 pins 1 & 2 | JP2 pins 3 & 4 |
          |--------------------------+----------------+----------------|
          |    Normal unshielded     |      Open      |      Open      |
          |       twisted pair       |                |                |
          |--------------------------+----------------+----------------|
          |     Reduced squelch      |     Closed     |     Closed     |
          | unshielded twisted pair  |                |                |
          |--------------------------+----------------+----------------|
          |   AUI Transceiver via    |     Closed     |      Open      |
          |        DB-15 port        |                |                |
          |--------------------------+----------------+----------------|
          |  RG-58A/U 50ohm coaxial  |      Open      |     Closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 BASE I/O ADDRESS SELECTION                 |
          |------------------------------------------------------------|
          | Address  | JP8 pins 1 & 2 | JP8 pins 3 & 4 | JP8 pins 5 &  |
          |          |                |                |       6       |
          |----------+----------------+----------------+---------------|
          | Software |      Open      |      Open      |     Open      |
          |----------+----------------+----------------+---------------|
          |  02C0h   |     Closed     |      Open      |     Open      |
          |----------+----------------+----------------+---------------|
          |  0240h   |      Open      |     Closed     |     Open      |
          |----------+----------------+----------------+---------------|
          |  0280h   |      Open      |     Closed     |    Closed     |
          |----------+----------------+----------------+---------------|
          |  0300h   |      Open      |      Open      |     Open      |
          |----------+----------------+----------------+---------------|
          |  0320h   |     Closed     |      Open      |    Closed     |
          |----------+----------------+----------------+---------------|
          |  0340h   |     Closed     |     Closed     |     Open      |
          |----------+----------------+----------------+---------------|
          |  0360h   |     Closed     |     Closed     |    Closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    INTERRUPT SELECTION                     |
          |------------------------------------------------------------|
          |  IRQ  | JP3 pins 1  | JP3 pins 3 | JP3 pins 5 | JP3 pins 7 |
          |       |     & 2     |    & 4     |    & 6     |    & 8     |
          |-------+-------------+------------+------------+------------|
          | IRQ3  |   Closed    |    Open    |    Open    |    Open    |
          |-------+-------------+------------+------------+------------|
          | IRQ4  |   Closed    |    Open    |    Open    |   Closed   |
          |-------+-------------+------------+------------+------------|
          | IRQ5  |   Closed    |    Open    |   Closed   |    Open    |
          |-------+-------------+------------+------------+------------|
          | IRQ9  |   Closed    |    Open    |   Closed   |   Closed   |
          |-------+-------------+------------+------------+------------|
          | IRQ10 |   Closed    |   Closed   |    Open    |    Open    |
          |-------+-------------+------------+------------+------------|
          | IRQ11 |   Closed    |   Closed   |    Open    |   Closed   |
          |-------+-------------+------------+------------+------------|
          | IRQ12 |   Closed    |   Closed   |   Closed   |    Open    |
          |-------+-------------+------------+------------+------------|
          | IRQ15 |   Closed    |   Closed   |   Closed   |   Closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  LINK PULSE CONFIGURATION                  |
          |------------------------------------------------------------|
          |            Setting            |            JP4             |
          |-------------------------------+----------------------------|
          |      Link pulse enabled       |            Open            |
          |-------------------------------+----------------------------|
          |      Link pulse disabled      |           Closed           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                COMPATIBILITY CONFIGURATION                 |
          |------------------------------------------------------------|
          |                Setting                 |   JP5   |   JP5   |
          |                                        | pins 1  | pins 3  |
          |                                        |   & 2   |   & 4   |
          |----------------------------------------+---------+---------|
          |  Channel ready signal generated after  |  Open   |  Open   |
          |             command signal             |         |         |
          |----------------------------------------+---------+---------|
          |  Channel ready signal generated after  | Closed  |  Open   |
          |           bus address latch            |         |         |
          |----------------------------------------+---------+---------|
          | I/O 16-bit signal generated after I/O  |  Open   | Closed  |
          |       read or I/O write signals        |         |         |
          |----------------------------------------+---------+---------|
          |   I/O 16-bit only on address decode    |  Open   |  Open   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              SOFTWARE/HARDWARE CONFIGURATION               |
          |------------------------------------------------------------|
          |            Setting            |            JP6             |
          |-------------------------------+----------------------------|
          |      Software configured      |           Closed           |
          |-------------------------------+----------------------------|
          |      Hardware configured      |            Open            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                BUFFERING MODE CONFIGURATION                |
          |------------------------------------------------------------|
          |            Setting            |            JP7             |
          |-------------------------------+----------------------------|
          |         Memory mapped         |            Open            |
          |-------------------------------+----------------------------|
          |          I/O mapped           |           Closed           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               MISCELLANEOUSE TECHNICAL NOTE                |
          |------------------------------------------------------------|
          |  Note: The JP1 Boot ROM Base address configuration is not  |
          |              available from the manufacturer.              |
          +------------------------------------------------------------+