
THOMAS-CONRAD CORPORATION

TC6245

NIC Type      ARCnet
Transfer Rate 2.5Mbps
Data Bus      16-bit ISA
Topology      Star
Wiring Type   RG62A/U 93ohm coaxial
Boot ROM      Available

[Image]

                               NODE ADDRESS

  Node   SW2/1    SW2/2   SW2/3   SW2/4    SW2/5   SW2/6    SW2/7   SW2/8

   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)

                   RESPONSE AND RECONFIGURATION TIMEOUT

                   Mode                         JP12            JP13

        Network cable distance < 20,000        Open            Open
                      feet

         Network cable distance > 20,000       Closed          Closed
                      feet

      Note :All NICs on the network must have these two jumpers set the
      same.

                            BASE MEMORY ADDRESS

     Memory       SW1/1    SW1/2     SW1/3     SW1/4     SW1/5     SW1/6
    Address

      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

                                             INTERRUPT REQUEST

   IRQ      JP1      JP2      JP3      JP4      JP5     JP20     JP21     JP22     JP23     JP24     JP25

     2/9   Open     Open     Open     Open    Open     Open     Open     Open     Open     Open    Closed

      3     Open     Open     Open     Open    Open     Closed   Open     Open     Open     Open     Open

      4     Open     Open     Open     Open    Open     Open     Closed   Open     Open     Open     Open

      5     Open     Open     Open     Open    Open     Open     Open     Closed   Open     Open     Open

      6     Open     Open     Open     Open    Open     Open     Open     Open    Closed    Open     Open

      7     Open     Open     Open     Open    Open     Open     Open     Open     Open    Closed    Open

      10    Open     Open     Open     Open    Closed   Open     Open     Open     Open     Open     Open

      11    Open     Open     Open    Closed   Open     Open     Open     Open     Open     Open     Open

      13    Open     Open    Closed    Open    Open     Open     Open     Open     Open     Open     Open

      14   Closed    Open     Open     Open    Open     Open     Open     Open     Open     Open     Open

      15    Open    Closed    Open     Open    Open     Open     Open     Open     Open     Open     Open

                                WAIT STATE

                 Setting                               SW1/7

         Zero wait states disabled                      On

           Zero wait states enabled                     Off

                            COMPATIBILITY MODE

                   Mode                                SW1/8

                Enhanced mode                           On

                Compatible mode                         Off

      Note :Enhanced mode optimizes performance and minimizes conflicts
      of your hardware, by using a Thomas-Conrad

                             BLOCK DECODE SIZE

                   Size                                 JP7

           16K memory block decode                     Off

           128K memory block decode                      On

       Note:A 16-bit VGA adapter typically decodes base memory in 128K
       blocks. If you are installing the NIC in a system with such a
       card, you may need to set the NIC block decode size to 128K. If
       you set the block decode size to 128K then all other adapters in
       the system must also utilize 128K decode.

                             I/O BASE ADDRESS

     I/O        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

                             DIAGNOSTIC LED(S)

    LED       Color       Status                   Condition

     1         Red          On            Data is being transmitted or
                                                   receiving

     1        Green         On         Card is not configured correctly

     2        Green      Blinking     Card is configured correctly and is
                                             connected to network

     2         N/A          Off        Card is defective or not connected
                                                  to network

                       MISCELLANEOUS NOTES

  Note:Not all components are as shown on later card revisions.

