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

   LanCard A-286/LanCard A-286 HiZ

   NIC Type         ARCnet                                        
   Transfer Rate    2.5Mbps                                       
   Data Bus         8-bit ISA                                     
   Topology         Star (A-286)                                  
                                                                  
                    Linear Bus (A-286 HiZ only)                   
   Wiring Type      RG-62A/U 93ohm coaxial (A-286 or A-286 HiZ)   
                                                                  
                    RG-58A/U 50ohm coaxial (A-286 HiZ only)       
   Boot ROM         Available                                     

<gopher://bitreich.org/I/th99/n/S-T/40127-1.png>
   

   +------------------------------------------------------------+
   |                        NODE ADDRESS                        |
   |------------------------------------------------------------|
   |Node |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |SW1/8|
   |-----+------+------+------+------+------+------+------+-----|
   |  0  |  -   |  -   |  -   |  -   |  -   |  -   |  -   |  -  |
   |-----+------+------+------+------+------+------+------+-----|
   |  1  |  On  |  On  |  On  |  On  |  On  |  On  |  On  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   |  2  |  On  |  On  |  On  |  On  |  On  |  On  | Off  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   |  3  |  On  |  On  |  On  |  On  |  On  |  On  | Off  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   |  4  |  On  |  On  |  On  |  On  |  On  | Off  |  On  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   | 251 | Off  | Off  | Off  | Off  | Off  |  On  | Off  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   | 252 | Off  | Off  | Off  | Off  | Off  | Off  |  On  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   | 253 | Off  | Off  | Off  | Off  | Off  | Off  |  On  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   | 254 | Off  | Off  | Off  | Off  | Off  | Off  | Off  | On  |
   |-----+------+------+------+------+------+------+------+-----|
   | 255 | Off  | Off  | Off  | Off  | Off  | Off  | Off  | Off |
   |------------------------------------------------------------|
   |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 1 is the Least Significant Bit and      |
   |  switch 8 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 off the switches and add the|
   |  values of the off switches to obtain the correct node     |
   |  address. (On=0, off=1)                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   |   LED   |    Status    |             Condition             |
   |---------+--------------+-----------------------------------|
   |   L1    |     Off      |   Data is not being transmitted   |
   |---------+--------------+-----------------------------------|
   |   L1    |   Blinking   |       Card is reconfiguring       |
   |---------+--------------+-----------------------------------|
   |   L1    |      On      | Card is operating normally on the |
   |         |              |              network              |
   |------------------------------------------------------------|
   | Note:If either of the first two conditions persists, a     |
   | hardware failure exists.                                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     INTERRUPT REQUEST                      |
   |------------------------------------------------------------|
   |   IRQ   |   JP1    |   JP2   |   JP3   |   JP4   |   JP5   |
   |---------+----------+---------+---------+---------+---------|
   |>> |  2  |  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 | JP6  |  JP7   |  JP8   |  JP9   |  JP10  | JP11  |
   |---------+------+--------+--------+--------+--------+-------|
   |>> | 2E0h | Open | Closed |  Open  |  Open  |  Open  |Closed |
   |--+------+------+--------+--------+--------+--------+-------|
   |  | 280h | Open | Closed |  Open  | Closed | Closed |Closed |
   |--+------+------+--------+--------+--------+--------+-------|
   |  | 2F0h | Open | Closed |  Open  |  Open  |  Open  | Open  |
   |--+------+------+--------+--------+--------+--------+-------|
   |  | 300h | Open |  Open  | Closed | Closed | Closed |Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      BOOT ROM ADDRESS                      |
   |------------------------------------------------------------|
   |   Address   |  JP12  | JP13  |  JP14   |  JP15   |  JP16   |
   |-------------+--------+-------+---------+---------+---------|
   |>> |  D0OOh  |  Open  | Open  | Closed  |  Open   | Closed  |
   |---+---------+--------+-------+---------+---------+---------|
   |   |  C0OOh  |  Open  | Open  | Closed  | Closed  | Closed  |
   |---+---------+--------+-------+---------+---------+---------|
   |   |  C8OOh  |  Open  | Open  | Closed  | Closed  |  Open   |
   |---+---------+--------+-------+---------+---------+---------|
   |   |  D8OOh  |  Open  | Open  | Closed  |  Open   |  Open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             RESPONSE/RECONFIGURATION TIMEOUTS              |
   |------------------------------------------------------------|
   | Distance  | Response |  Reconfiguration  |  JP17  |  JP18  |
   |           |   Time   |                   |        |        |
   |-----------+----------+-------------------+--------+--------|
   |>> |  4.8  |  74.7us  |       840ms       |  Open  |  Open  |
   |   | miles |          |                   |        |        |
   |---+-------+----------+-------------------+--------+--------|
   |   | 21.0  | 263.4us  |      1680ms       | Closed |  Open  |
   |   | miles |          |                   |        |        |
   |---+-------+----------+-------------------+--------+--------|
   |   | 42.5  | 561.8us  |      1680ms       |  Open  | Closed |
   |   | miles |          |                   |        |        |
   |---+-------+----------+-------------------+--------+--------|
   |   | 85.6  | 1118.6us |      1680ms       | Closed | Closed |
   |   | miles |          |                   |        |        |
   |------------------------------------------------------------|
   | Note:The distance given is the maximum distance between    |
   | the two furthest nodes on the network.                     |
   +------------------------------------------------------------+