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       # THOMAS-CONRAD CORPORATION
       
          TC6242-OTP
       
          NIC Type         ARCnet                                        
          Transfer Rate    2.5Mbps                                       
          Data Bus         8-bit ISA                                     
          Topology         Star                                          
                                                                         
                           Linear Bus                                    
          Wiring Type      Shielded twisted pair                         
                                                                         
                           Unshielded twisted pair                       
          Boot ROM         Available                                     
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        NODE ADDRESS                        |
          |------------------------------------------------------------|
          | Node |SW2/ 1 |SW2/ 2 |SW2/ 3|SW2/ 4|SW2/ 5|SW2/ 6|SW2/|SW2/|
          |      |       |       |      |      |      |      | 7  | 8  |
          |------+-------+-------+------+------+------+------+----+----|
          |  0   |   -   |   -   |  -   |  -   |  -   |  -   | -  | -  |
          |------+-------+-------+------+------+------+------+----+----|
          |  1   |  Off  |  On   |  On  |  On  |  On  |  On  | On | On |
          |------+-------+-------+------+------+------+------+----+----|
          |  2   |  On   |  Off  |  On  |  On  |  On  |  On  | On | On |
          |------+-------+-------+------+------+------+------+----+----|
          |  3   |  Off  |  Off  |  On  |  On  |  On  |  On  | On | On |
          |------+-------+-------+------+------+------+------+----+----|
          |  4   |  On   |  On   | Off  |  On  |  On  |  On  | On | On |
          |------+-------+-------+------+------+------+------+----+----|
          | 251  |  Off  |  Off  |  On  | Off  | Off  | Off  |Off |Off |
          |------+-------+-------+------+------+------+------+----+----|
          | 252  |  On   |  On   | Off  | Off  | Off  | Off  |Off |Off |
          |------+-------+-------+------+------+------+------+----+----|
          | 253  |  Off  |  On   | Off  | Off  | Off  | Off  |Off |Off |
          |------+-------+-------+------+------+------+------+----+----|
          | 254  |  On   |  Off  | Off  | Off  | Off  | Off  |Off |Off |
          |------+-------+-------+------+------+------+------+----+----|
          | 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 1=1, 2=2, 3=4, 4=8,  |
          |  5=16, 6=32, 7=64, 8=128. Turn off the switches and add the|
          |  values of the off switches to obtain the correct node     |
          |  address. (On=0, off=1)                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     INTERRUPT REQUEST                      |
          |------------------------------------------------------------|
          |   IRQ   |   JP1    |   JP2   |   JP3   |   JP4   |   JP5   |
          |---------+----------+---------+---------+---------+---------|
          | » |  2  |   Open   |  Open   |  Open   |  Open   | Closed  |
          |---+-----+----------+---------+---------+---------+---------|
          |   |  3  |  Closed  |  Open   |  Open   |  Open   |  Open   |
          |---+-----+----------+---------+---------+---------+---------|
          |   |  4  |   Open   | Closed  |  Open   |  Open   |  Open   |
          |---+-----+----------+---------+---------+---------+---------|
          |   |  5  |   Open   |  Open   | Closed  |  Open   |  Open   |
          |---+-----+----------+---------+---------+---------+---------|
          |   |  7  |   Open   |  Open   |  Open   | Closed  |  Open   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |           RESPONSE AND RECONFIGURATION TIMEOUTS            |
          |------------------------------------------------------------|
          |             Setting             |     JP6     |    JP7     |
          |---------------------------------+-------------+------------|
          | »     | Network cable distance  |    Open     |    Open    |
          |       |    under 20,000 feet    |             |            |
          |-------+-------------------------+-------------+------------|
          |       | Network cable distance  |   Closed    |   Closed   |
          |       |   greater than 20,000   |             |            |
          |       |          feet           |             |            |
          |------------------------------------------------------------|
          | Note:All NICs on the network must have these two jumpers   |
          | set the same. If all NICs are not set the same, the        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    BASE MEMORY ADDRESS                     |
          |------------------------------------------------------------|
          |  Address   | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 |
          |------------+-------+-------+-------+-------+-------+-------|
          | » | D000h  |  Off  |  Off  |  On   |  Off  |  On   |  On   |
          |---+--------+-------+-------+-------+-------+-------+-------|
          |   | C000h  |  Off  |  Off  |  On   |  On   |  On   |  On   |
          |---+--------+-------+-------+-------+-------+-------+-------|
          |   | C400h  |  Off  |  Off  |  On   |  On   |  On   |  Off  |
          |---+--------+-------+-------+-------+-------+-------+-------|
          |   | C800h  |  Off  |  Off  |  On   |  On   |  Off  |  On   |
          |---+--------+-------+-------+-------+-------+-------+-------|
          |   | CC00h  |  Off  |  Off  |  On   |  On   |  Off  |  Off  |
          |---+--------+-------+-------+-------+-------+-------+-------|
          |   | D400h  |  Off  |  Off  |  On   |  Off  |  On   |  Off  |
          |---+--------+-------+-------+-------+-------+-------+-------|
          |   | D800h  |  Off  |  Off  |  On   |  Off  |  Off  |  On   |
          |---+--------+-------+-------+-------+-------+-------+-------|
          |   | DC00h  |  Off  |  Off  |  On   |  Off  |  Off  |  Off  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     COMPATIBILITY MODE                     |
          |------------------------------------------------------------|
          |                  Setting                  |     SW1/8      |
          |-------------------------------------------+----------------|
          | »          |        Enhanced mode         |       On       |
          |------------+------------------------------+----------------|
          |            |       Compatible mode        |      Off       |
          |------------------------------------------------------------|
          | Note: Enhanced mode optimizes performance and minimizes    |
          | conflicts of your hardware by using a Thomas-Conrad        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      I/O BASE ADDRESS                      |
          |------------------------------------------------------------|
          |  Address  | SW3/3  | SW3/4 | SW3/5 | SW3/6 | SW3/7 | SW3/8 |
          |-----------+--------+-------+-------+-------+-------+-------|
          | » | 2E0h  |  Off   |  On   |  Off  |  Off  |  Off  |  On   |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 2F0h  |  Off   |  On   |  Off  |  Off  |  Off  |  Off  |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 300h  |  Off   |  Off  |  On   |  On   |  On   |  On   |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 310h  |  Off   |  Off  |  On   |  On   |  On   |  Off  |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 320h  |  Off   |  Off  |  On   |  On   |  Off  |  On   |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 330h  |  Off   |  Off  |  On   |  On   |  Off  |  Off  |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 340h  |  Off   |  Off  |  On   |  Off  |  On   |  On   |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 350h  |  Off   |  Off  |  On   |  Off  |  On   |  Off  |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 360h  |  Off   |  Off  |  On   |  Off  |  Off  |  On   |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 370h  |  Off   |  Off  |  On   |  Off  |  Off  |  Off  |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 380h  |  Off   |  Off  |  Off  |  On   |  On   |  On   |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 390h  |  Off   |  Off  |  Off  |  On   |  On   |  Off  |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 3A0h  |  Off   |  Off  |  Off  |  On   |  Off  |  On   |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 3B0h  |  Off   |  Off  |  Off  |  On   |  Off  |  Off  |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 3C0h  |  Off   |  Off  |  Off  |  Off  |  On   |  On   |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 3D0h  |  Off   |  Off  |  Off  |  Off  |  On   |  Off  |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 3E0h  |  Off   |  Off  |  Off  |  Off  |  Off  |  On   |
          |---+-------+--------+-------+-------+-------+-------+-------|
          |   | 3F0h  |  Off   |  Off  |  Off  |  Off  |  Off  |  Off  |
          |------------------------------------------------------------|
          | Note: SW3/ 1 & SW3/ 2 are always in the on position.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                FACTORY CONFIGURED SETTINGS                 |
          |------------------------------------------------------------|
          |            Switch            |           Setting           |
          |------------------------------+-----------------------------|
          |            SW3/1             |             On              |
          |------------------------------+-----------------------------|
          |            SW3/2             |             On              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIAGNOSTIC LED(S)                      |
          |------------------------------------------------------------|
          | LED  | Status |                 Condition                  |
          |------+--------+--------------------------------------------|
          | LED1 |   On   |   Data is being transmitted or received.   |
          |------+--------+--------------------------------------------|
          | LED1 |  Off   | Data is not being transmitted or received. |
          +------------------------------------------------------------+