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       # TIARA COMPUTER SYSTEMS, INC.
       
          LanCard/E*PC
       
          NIC Type         Ethernet                                      
          Transfer Rate    10Mbps                                        
          Data Bus         8-bit ISA                                     
          Topology         Linear Bus                                    
          Wiring Type      RG-58A/U 50ohm coaxial                        
                                                                         
                           AUI transceiver via DB-15 port                
          Boot ROM         Available                                     
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                          BOOT ROM                          |
          |------------------------------------------------------------|
          |          Setting           |              JP8              |
          |----------------------------+-------------------------------|
          | » |        Disabled        |       Pins 1 & 2 Closed       |
          |---+------------------------+-------------------------------|
          |   |        Enabled         |       Pins 2 & 3 Closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    BASE MEMORY ADDRESS                     |
          |------------------------------------------------------------|
          |  Address   |      JP9      |     JP10      |     JP11      |
          |------------+---------------+---------------+---------------|
          |   | C0000h |  Pins 1 & 2   |  Pins 1 & 2   |  Pins 1 & 2   |
          |   |        |    Closed     |    Closed     |    Closed     |
          |---+--------+---------------+---------------+---------------|
          |   | C4000h |  Pins 1 & 2   |  Pins 2 & 3   |  Pins 1 & 2   |
          |   |        |    Closed     |    Closed     |    Closed     |
          |---+--------+---------------+---------------+---------------|
          |   | C8000h |  Pins 1 & 2   |  Pins 1 & 2   |  Pins 2 & 3   |
          |   |        |    Closed     |    Closed     |    Closed     |
          |---+--------+---------------+---------------+---------------|
          |   | CC000h |  Pins 1 & 2   |  Pins 2 & 3   |  Pins 2 & 3   |
          |   |        |    Closed     |    Closed     |    Closed     |
          |---+--------+---------------+---------------+---------------|
          | » | D0000h |  Pins 2 & 3   |  Pins 1 & 2   |  Pins 1 & 2   |
          |   |        |    Closed     |    Closed     |    Closed     |
          |---+--------+---------------+---------------+---------------|
          |   | D4000h |  Pins 2 & 3   |  Pins 2 & 3   |  Pins 1 & 2   |
          |   |        |    Closed     |    Closed     |    Closed     |
          |---+--------+---------------+---------------+---------------|
          |   | D8000h |  Pins 2 & 3   |  Pins 1 & 2   |  Pins 2 & 3   |
          |   |        |    Closed     |    Closed     |    Closed     |
          |---+--------+---------------+---------------+---------------|
          |   | DC000h |  Pins 2 & 3   |  Pins 2 & 3   |  Pins 2 & 3   |
          |   |        |    Closed     |    Closed     |    Closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     INTERRUPT REQUEST                      |
          |------------------------------------------------------------|
          |   IRQ    |  JP19   |  JP20   |  JP21   |  JP22   |  JP23   |
          |----------+---------+---------+---------+---------+---------|
          |   | 2/9  | Closed  |  Open   |  Open   |  Open   |  Open   |
          |---+------+---------+---------+---------+---------+---------|
          | » |  3   |  Open   | Closed  |  Open   |  Open   |  Open   |
          |---+------+---------+---------+---------+---------+---------|
          |   |  4   |  Open   |  Open   | Closed  |  Open   |  Open   |
          |---+------+---------+---------+---------+---------+---------|
          |   |  5   |  Open   |  Open   |  Open   | Closed  |  Open   |
          |---+------+---------+---------+---------+---------+---------|
          |   |  7   |  Open   |  Open   |  Open   |  Open   | Closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      I/O BASE ADDRESS                      |
          |------------------------------------------------------------|
          |  Address   |    JP3    |  JP4   |  JP5   |  JP6   |  JP7   |
          |------------+-----------+--------+--------+--------+--------|
          |    | 000h  | Pins 1 &  | Pins 1 | Pins 1 | Pins 1 | Pins 1 |
          |    |       |     2     |  & 2   |  & 2   |  & 2   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 020h  | Pins 2 &  | Pins 1 | Pins 1 | Pins 1 | Pins 1 |
          |    |       |     3     |  & 2   |  & 2   |  & 2   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 040h  | Pins 1 &  | Pins 2 | Pins 1 | Pins 1 | Pins 1 |
          |    |       |     2     |  & 3   |  & 2   |  & 2   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 060h  | Pins 2 &  | Pins 2 | Pins 1 | Pins 1 | Pins 1 |
          |    |       |     3     |  & 3   |  & 2   |  & 2   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 080h  | Pins 1 &  | Pins 1 | Pins 2 | Pins 1 | Pins 1 |
          |    |       |     2     |  & 2   |  & 3   |  & 2   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 0A0h  | Pins 2 &  | Pins 1 | Pins 2 | Pins 1 | Pins 1 |
          |    |       |     3     |  & 2   |  & 3   |  & 2   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 0C0h  | Pins 1 &  | Pins 2 | Pins 2 | Pins 1 | Pins 1 |
          |    |       |     2     |  & 3   |  & 3   |  & 2   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 0E0h  | Pins 2 &  | Pins 2 | Pins 2 | Pins 1 | Pins 1 |
          |    |       |     3     |  & 3   |  & 3   |  & 2   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 100h  | Pins 1 &  | Pins 1 | Pins 1 | Pins 2 | Pins 1 |
          |    |       |     2     |  & 2   |  & 2   |  & 3   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 120h  | Pins 2 &  | Pins 1 | Pins 1 | Pins 2 | Pins 1 |
          |    |       |     3     |  & 2   |  & 2   |  & 3   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 140h  | Pins 1 &  | Pins 2 | Pins 1 | Pins 2 | Pins 1 |
          |    |       |     2     |  & 3   |  & 2   |  & 3   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 160h  | Pins 2 &  | Pins 2 | Pins 1 | Pins 2 | Pins 1 |
          |    |       |     3     |  & 3   |  & 2   |  & 3   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 180h  | Pins 1 &  | Pins 1 | Pins 2 | Pins 2 | Pins 1 |
          |    |       |     2     |  & 2   |  & 3   |  & 3   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 1A0h  | Pins 2 &  | Pins 1 | Pins 2 | Pins 2 | Pins 1 |
          |    |       |     3     |  & 2   |  & 3   |  & 3   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 1C0h  | Pins 1 &  | Pins 2 | Pins 2 | Pins 2 | Pins 1 |
          |    |       |     2     |  & 3   |  & 3   |  & 3   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 1E0h  | Pins 2 &  | Pins 2 | Pins 2 | Pins 2 | Pins 1 |
          |    |       |     3     |  & 3   |  & 3   |  & 3   |  & 2   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 200h  | Pins 1 &  | Pins 1 | Pins 1 | Pins 1 | Pins 2 |
          |    |       |     2     |  & 2   |  & 2   |  & 2   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 220h  | Pins 2 &  | Pins 1 | Pins 1 | Pins 1 | Pins 2 |
          |    |       |     3     |  & 2   |  & 2   |  & 2   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 240h  | Pins 1 &  | Pins 2 | Pins 1 | Pins 1 | Pins 2 |
          |    |       |     2     |  & 3   |  & 2   |  & 2   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 260h  | Pins 2 &  | Pins 2 | Pins 1 | Pins 1 | Pins 2 |
          |    |       |     3     |  & 3   |  & 2   |  & 2   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 280h  | Pins 1 &  | Pins 1 | Pins 2 | Pins 1 | Pins 2 |
          |    |       |     2     |  & 2   |  & 3   |  & 2   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 2A0h  | Pins 2 &  | Pins 1 | Pins 2 | Pins 1 | Pins 2 |
          |    |       |     3     |  & 2   |  & 3   |  & 2   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 2C0h  | Pins 1 &  | Pins 2 | Pins 2 | Pins 1 | Pins 2 |
          |    |       |     2     |  & 3   |  & 3   |  & 2   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 2E0h  | Pins 2 &  | Pins 2 | Pins 2 | Pins 1 | Pins 2 |
          |    |       |     3     |  & 3   |  & 3   |  & 2   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          | »  | 300h  | Pins 1 &  | Pins 1 | Pins 1 | Pins 2 | Pins 2 |
          |    |       |     2     |  & 2   |  & 2   |  & 3   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 320h  | Pins 2 &  | Pins 1 | Pins 1 | Pins 2 | Pins 2 |
          |    |       |     3     |  & 2   |  & 2   |  & 3   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 340h  | Pins 1 &  | Pins 2 | Pins 1 | Pins 2 | Pins 2 |
          |    |       |     2     |  & 3   |  & 2   |  & 3   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 360h  | Pins 2 &  | Pins 2 | Pins 1 | Pins 2 | Pins 2 |
          |    |       |     3     |  & 3   |  & 2   |  & 3   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 380h  | Pins 1 &  | Pins 1 | Pins 2 | Pins 2 | Pins 2 |
          |    |       |     2     |  & 2   |  & 3   |  & 3   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 3A0h  | Pins 2 &  | Pins 1 | Pins 2 | Pins 2 | Pins 2 |
          |    |       |     3     |  & 2   |  & 3   |  & 3   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 3C0h  | Pins 1 &  | Pins 2 | Pins 2 | Pins 2 | Pins 2 |
          |    |       |     2     |  & 3   |  & 3   |  & 3   |  & 3   |
          |----+-------+-----------+--------+--------+--------+--------|
          |    | 3E0h  | Pins 2 &  | Pins 2 | Pins 2 | Pins 2 | Pins 2 |
          |    |       |     3     |  & 3   |  & 3   |  & 3   |  & 3   |
          |------------------------------------------------------------|
          | Note:Pins designated should be in the closed position.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DMA CHANNEL                         |
          |------------------------------------------------------------|
          |  Channel  |  JP24  | JP25  | JP26  | JP27  | JP28  | JP29  |
          |-----------+--------+-------+-------+-------+-------+-------|
          |»|Disabled | Closed | Open  | Open  |Closed | Open  | Open  |
          |-+---------+--------+-------+-------+-------+-------+-------|
          | |  DMA1   |  Open  |Closed | Open  | Open  |Closed | Open  |
          |-+---------+--------+-------+-------+-------+-------+-------|
          | |  DMA3   |  Open  | Open  |Closed | Open  | Open  |Closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         WAIT STATE                         |
          |------------------------------------------------------------|
          |              Setting              |          JPA           |
          |-----------------------------------+------------------------|
          | » |   Zero wait states disabled   |   Pins 2 & 3 Closed    |
          |---+-------------------------------+------------------------|
          |   |   Zero wait states enabled    |   Pins 1 & 2 Closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CABLE LENGTH                        |
          |------------------------------------------------------------|
          |                Setting                 |        JPB        |
          |----------------------------------------+-------------------|
          | Long cable segment mode (100 nodes on  | Pins 1 & 2 Closed |
          |        a single 984 foot cable)        |                   |
          |----------------------------------------+-------------------|
          | Short cable segment mode (30 nodes on  | Pins 2 & 3 Closed |
          |        a single 607 foot cable)        |                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CABLE TYPE                         |
          |------------------------------------------------------------|
          |          Type          |  JPC   |  JPD   |  JPE   |  JPF   |
          |------------------------+--------+--------+--------+--------|
          | » |   RG-58A/U 50ohm   | Pins 1 | Pins 1 | Pins 1 | Pins 1 |
          |   |      coaxial       |  & 2   |  & 2   |  & 2   |  & 2   |
          |---+--------------------+--------+--------+--------+--------|
          |   |  AUI transceiver   | Pins 2 | Pins 2 | Pins 2 | Pins 2 |
          |   |   via DB-15 port   |  & 3   |  & 3   |  & 3   |  & 3   |
          |------------------------------------------------------------|
          | Note:Pins designated should be in the closed position.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          |    LED    |   Status    |            Condition             |
          |-----------+-------------+----------------------------------|
          |   LED1    |     On      |   Data is being received power   |
          |-----------+-------------+----------------------------------|
          |   LED1    |     Off     | Data is not being received power |
          +------------------------------------------------------------+