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

   ARCNET UNIVERSAL LANCARD

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

<gopher://bitreich.org/I/th99/n/S-T/40750-1.png>
   

   +------------------------------------------------------------+
   |                          BOOT ROM                          |
   |------------------------------------------------------------|
   |             Setting             |          JP2/I           |
   |---------------------------------+--------------------------|
   |>> |          Disabled           |           Open           |
   |---+-----------------------------+--------------------------|
   |   |           Enabled           |          Closed          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         CABLE TYPE                         |
   |------------------------------------------------------------|
   |          Type          |       JP3       |       JP4       |
   |------------------------+-----------------+-----------------|
   |>> |   Thin Ethernet    |   Pins 1 & 2    |   Pins 1 & 2    |
   |   |                    |     closed      |     closed      |
   |---+--------------------+-----------------+-----------------|
   |   | Unshielded twisted |   Pins 2 & 3    |   Pins 2 & 3    |
   |   |        pair        |     closed      |     closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     I/O ADDRESS SELECT                     |
   |------------------------------------------------------------|
   |      Address      |     JP2/A     |   JP2/B    |   JP2/C   |
   |-------------------+---------------+------------+-----------|
   |>>     |   2E0h    |    Closed     |    Open    |   Open    |
   |------------------------------------------------------------|
   |   Note: All other address configurations are unspecified   |
   |   in manufacturer documentation. Alternate address         |
   |   settings should be silk-screened on the board itself.    |
   +------------------------------------------------------------+

+----------------------------------------------------------------------+
|                           INTERRUPT SELECT                           |
|----------------------------------------------------------------------|
|  IRQ  |JP1/A |JP1/B |JP1/C |JP1/D |JP1/E |JP1/F |JP1/G |JP1/H |JP1/I |
|-------+------+------+------+------+------+------+------+------+------|
|>>|     |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
|-+-----+------+------+------+------+------+------+------+------+------|
| |IRQ3 | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
|-+-----+------+------+------+------+------+------+------+------+------|
| |IRQ4 | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
|-+-----+------+------+------+------+------+------+------+------+------|
| |IRQ5 | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
|-+-----+------+------+------+------+------+------+------+------+------|
| |IRQ7 | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
|-+-----+------+------+------+------+------+------+------+------+------|
| |IRQ10| Open | Open | Open | Open | Open |Closed| Open | Open | Open |
|-+-----+------+------+------+------+------+------+------+------+------|
| |IRQ11| Open | Open | Open | Open | Open | Open |Closed| Open | Open |
|-+-----+------+------+------+------+------+------+------+------+------|
| |IRQ12| Open | Open | Open | Open | Open | Open | Open |Closed| Open |
|-+-----+------+------+------+------+------+------+------+------+------|
| |IRQ15| Open | Open | Open | Open | Open | Open | Open | Open |Closed|
+----------------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        NODE ADDRESS                        |
   |------------------------------------------------------------|
   |Node |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |SW1/8|
   |-----+------+------+------+------+------+------+------+-----|
   |  0  |  -   |  -   |  -   |  -   |  -   |  -   |  -   |  -  |
   |-----+------+------+------+------+------+------+------+-----|
   |  1  |  On  | Off  | Off  | Off  | Off  | Off  | Off  | Off |
   |-----+------+------+------+------+------+------+------+-----|
   |  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 1 is the Least Significant Bit and      |
   |  switch 8 is the Most Significant Bit. The switches have   |
   |  the following decimal values: switch 1=1, 2=2, 3=4, 4=8,  |
   |  5=16, 6=32, 7=64, 8=128. Turn on the switches and add the |
   |  values of the on switches to obtain the correct node      |
   |  address. (On=1, Off=0)                                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     RIM BUFFER ADDRESS                     |
   |------------------------------------------------------------|
   |    Address    | JP2/D  | JP2/E  | JP2/F  | JP2/G  | JP2/H  |
   |---------------+--------+--------+--------+--------+--------|
   |>> |  D0000h   | Closed |  Open  |  Open  | Closed | Closed |
   |------------------------------------------------------------|
   |   Note: All other address configurations are unspecified   |
   |   in manufacturer documentation. Alternate address         |
   |   settings should be silk-screened on the board itself.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          TOPOLOGY                          |
   |------------------------------------------------------------|
   |               Topology                |        JP5         |
   |---------------------------------------+--------------------|
   |>> |               Star                |       Closed       |
   |---+-----------------------------------+--------------------|
   |   |            Linear Bus             |        Open        |
   +------------------------------------------------------------+