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                                     

<gopher://bitreich.org/I/th99/n/S-T/41023-1.png>
   

   +------------------------------------------------------------+
   |                    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.              |
   +------------------------------------------------------------+