TIARA COMPUTER SYSTEMS, INC.
============================

   ARCNET LanCard AT

   NIC Type         ARCnet                                        
   Transfer Rate    2.5Mbps                                       
   Data Bus         16-bit ISA                                    
   Topology         Star                                          
                                                                  
                    Linear Bus                                    
   Wiring Type      Shielded twisted pair                         
                                                                  
                    Unshielded twisted pair                       
                                                                  
                    RG-58A/U 50ohm coaxial                        
   Boot ROM         Available                                     

<gopher://bitreich.org/I/th99/n/S-T/40110-1.png>
   

   +------------------------------------------------------------+
   |                        NODE ADDRESS                        |
   |------------------------------------------------------------|
   |Node |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |SW1/8|
   |-----+------+------+------+------+------+------+------+-----|
   |  0  |  -   |  -   |  -   |  -   |  -   |  -   |  -   |  -  |
   |-----+------+------+------+------+------+------+------+-----|
   |  1  | Off  | Off  | Off  | Off  | Off  | Off  | Off  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   |  2  | Off  | Off  | Off  | Off  | Off  | Off  |  On  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   |  3  | Off  | Off  | Off  | Off  | Off  | Off  |  On  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   |  4  | Off  | Off  | Off  | Off  | Off  |  On  | Off  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   | 251 |  On  |  On  |  On  |  On  |  On  | Off  |  On  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   | 252 |  On  |  On  |  On  |  On  |  On  |  On  | Off  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   | 253 |  On  |  On  |  On  |  On  |  On  |  On  | Off  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   | 254 |  On  |  On  |  On  |  On  |  On  |  On  |  On  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   | 255 |  On  |  On  |  On  |  On  |  On  |  On  |  On  | On  |
   |------------------------------------------------------------|
   |Note:Node address 0 is used for messaging between nodes and |
   |must not be used.                                           |
   |                                                            |
   |  A total of 255 node address settings are available. The   |
   |  switches are a binary representation of the decimal node  |
   |  addresses. Switch 8 is the Least Significant Bit and      |
   |  switch 1 is the Most Significant Bit. The switches have   |
   |  the following decimal values: switch 8=1, 7=2, 6=4, 5=8,  |
   |  4=16, 3=32, 2=64, 1=128. Turn on the switches and add the |
   |  values of the on switches to obtain the correct node      |
   |  address. (On=1, Off=0)                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         CABLE TYPE                         |
   |------------------------------------------------------------|
   |                 Type                 |      JP7 & JP8      |
   |--------------------------------------+---------------------|
   |>> |      RG-58A/U 50ohm coaxial      |  Pins 1 & 2 closed  |
   |---+----------------------------------+---------------------|
   |   | Shielded/Unshielded twisted pair |  Pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   TOPOLOGY CONFIGURATION                   |
   |------------------------------------------------------------|
   |             Topology             |           JP9           |
   |----------------------------------+-------------------------|
   |>> |          Linear Bus          |          Open           |
   |---+------------------------------+-------------------------|
   |   |             Star             |         Closed          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |     RIM BUFFER ADDRESS/BOOT ROM ADDRESS CONFIGURATION      |
   |------------------------------------------------------------|
   | Buffer  |Boot ROM|  JPA   |  JPB   |  JPC  |  JPD  |  JPE  |
   |---------+--------+--------+--------+-------+-------+-------|
   | | CCOOh | CE00h  | Closed | Closed |Closed | Open  |Closed |
   |-+-------+--------+--------+--------+-------+-------+-------|
   |>>| D000h | D200h  | Closed | Closed | Open  | Open  |Closed |
   |-+-------+--------+--------+--------+-------+-------+-------|
   | | D400h | D600h  | Closed | Closed |Closed |Closed | Open  |
   |-+-------+--------+--------+--------+-------+-------+-------|
   | | D800h | DA00h  | Closed | Closed | Open  |Closed | Open  |
   |-+-------+--------+--------+--------+-------+-------+-------|
   | | DC00h | DE00h  | Closed | Closed |Closed | Open  | Open  |
   |-+-------+--------+--------+--------+-------+-------+-------|
   | | E000h | E200h  | Closed | Closed | Open  | Open  | Open  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      I/O BASE ADDRESS                      |
   |------------------------------------------------------------|
   |    Address     |     JPF      |     JPG      |     JPH     |
   |----------------+--------------+--------------+-------------|
   |>> |    2E0h    |    Closed    |     Open     |   Closed    |
   |---+------------+--------------+--------------+-------------|
   |   |    260h    |    Closed    |    Closed    |   Closed    |
   |---+------------+--------------+--------------+-------------|
   |   |    290h    |     Open     |    Closed    |   Closed    |
   |---+------------+--------------+--------------+-------------|
   |   |    2F0h    |     Open     |     Open     |   Closed    |
   |---+------------+--------------+--------------+-------------|
   |   |    300h    |    Closed    |    Closed    |    Open     |
   |---+------------+--------------+--------------+-------------|
   |   |    350h    |     Open     |    Closed    |    Open     |
   |---+------------+--------------+--------------+-------------|
   |   |    380h    |    Closed    |     Open     |    Open     |
   |---+------------+--------------+--------------+-------------|
   |   |    3E0h    |     Open     |     Open     |    Open     |
   +------------------------------------------------------------+

+--------------------------------------------------------------------+
|                         INTERRUPT REQUEST                          |
|--------------------------------------------------------------------|
| IRQ | JPI  | JPJ  | JPK  | JPL  | JPM  | JPN  | JPO  | JPP  | JPQ  |
|-----+------+------+------+------+------+------+------+------+------|
|>>|2/9| Open | Open | Open | Open |Closed| Open | Open | Open | Open |
|-+---+------+------+------+------+------+------+------+------+------|
| | 3 | Open | Open | Open | Open | Open |Closed| Open | Open | Open |
|-+---+------+------+------+------+------+------+------+------+------|
| | 4 | Open | Open | Open | Open | Open | Open |Closed| Open | Open |
|-+---+------+------+------+------+------+------+------+------+------|
| | 5 | Open | Open | Open | Open | Open | Open | Open |Closed| Open |
|-+---+------+------+------+------+------+------+------+------+------|
| | 7 | Open | Open | Open | Open | Open | Open | Open | Open |Closed|
|-+---+------+------+------+------+------+------+------+------+------|
| |10 | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
|-+---+------+------+------+------+------+------+------+------+------|
| |11 | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
|-+---+------+------+------+------+------+------+------+------+------|
| |12 | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
|-+---+------+------+------+------+------+------+------+------+------|
| |15 |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
+--------------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  I/O OPTION CONFIGURATION                  |
   |------------------------------------------------------------|
   |   I/O CHRDY    |   Zero Wait   |     JPR     |     JPS     |
   |                |     State     |             |             |
   |----------------+---------------+-------------+-------------|
   |    Disabled    |   Disabled    |    Open     |    Open     |
   |----------------+---------------+-------------+-------------|
   |    Disabled    |    Enabled    |   Closed    |    Open     |
   |----------------+---------------+-------------+-------------|
   |    Enabled     |   Disabled    |    Open     |   Closed    |
   |------------------------------------------------------------|
   | Note:Zero wait state operation and I/O CHRDY signal cannot |
   | be enabled at the same time.                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   |  LED  |  Color  |  Status  |           Condition           |
   |-------+---------+----------+-------------------------------|
   |  L1   |   Red   |    On    |    Data is being received     |
   |-------+---------+----------+-------------------------------|
   |  L1   |   Red   |   Off    |  Data is not being received   |
   |-------+---------+----------+-------------------------------|
   |  L1   |   Red   | Blinking |     Card is reconfiguring     |
   |-------+---------+----------+-------------------------------|
   |  L2   |  Green  |    On    |   Data is being transmitted   |
   |-------+---------+----------+-------------------------------|
   |  L2   |  Green  |   Off    | Data is not being transmitted |
   |-------+---------+----------+-------------------------------|
   |  L2   |  Green  | Blinking |     Card is reconfiguring     |
   +------------------------------------------------------------+