THOMAS-CONRAD CORPORATION

TC6242

NIC Type      ARCnet
Transfer Rate 2.5Mbps
Data Bus      8-bit ISA
Topology      Star
Wiring Type   RG62A/U, 93ohm coaxial
Boot ROM      Available

[Image]

                               NODE ADDRESS

  Node     SW2/    SW2/    SW2/    SW2/     SW2/    SW2/    SW2/     SW2/
            1       2       3       4        5       6       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

                               CABLE LENGTH

           Length                     JP6                    JP7

  »     Under 20,000 feet             Open                   Open

       Greater than 20,000           Closed                 Closed
              feet

  Note: All NICs on the network must have this opition set the same.

                            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

                            COMPATABILITY 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.

                             DIAGNOSTIC LED(S)

      LED            Status                      Condition

      LED1             On           Data is being transmitted/received.

      LED1             Off                    Data is not being
                                           transmitted/received.