
TIARA COMPUTER SYSTEMS, INC.

ARCNET LanCard AT

NIC Type      ARCnet
Transfer Rate 2.5Mbps
Data Bus      16-bit ISA
Topology      Star

              Linear Bus
Wiring Type   Shielded twisted pair

              Unshielded twisted pair

              RG-58A/U 50ohm coaxial
Boot ROM      Available

[Image]

                               NODE ADDRESS

  Node   SW1/1    SW1/2   SW1/3   SW1/4    SW1/5   SW1/6    SW1/7   SW1/8

   0       -       -        -       -       -        -       -        -

   1      Off     Off      Off     Off     Off      Off     Off      On

   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
       8 is the Least Significant Bit and switch 1 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 on the
       switches and add the values of the on switches to obtain the
       correct node address. (On=1, Off=0)

                                CABLE TYPE

                     Type                              JP7 & JP8

             RG-58A/U 50ohm coaxial               Pins 1 & 2 closed

         Shielded/Unshielded twisted pair          Pins 2 & 3 closed

                          TOPOLOGY CONFIGURATION

                Topology                               JP9

                Linear Bus                            Open

                    Star                              Closed

             RIM BUFFER ADDRESS/BOOT ROM ADDRESS CONFIGURATION

    Buffer      Boot      JPA       JPB        JPC       JPD       JPE
                ROM

      CCOOh    CE00h     Closed    Closed    Closed     Open      Closed

     D000h    D200h     Closed    Closed     Open      Open      Closed

      D400h    D600h     Closed    Closed    Closed    Closed      Open

      D800h    DA00h     Closed    Closed     Open     Closed      Open

      DC00h    DE00h     Closed    Closed    Closed     Open       Open

      E000h    E200h     Closed    Closed     Open      Open       Open

                             I/O BASE ADDRESS

       Address              JPF               JPG               JPH

         2E0h            Closed             Open             Closed

          260h            Closed            Closed            Closed

          290h             Open             Closed            Closed

          2F0h             Open              Open             Closed

          300h            Closed            Closed             Open

          350h             Open             Closed             Open

          380h            Closed             Open              Open

          3E0h             Open              Open              Open

                                    INTERRUPT REQUEST

   IRQ      JPI      JPJ      JPK      JPL      JPM      JPN      JPO      JPP     JPQ

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

      3     Open     Open     Open     Open    Open     Closed   Open     Open     Open

      4     Open     Open     Open     Open    Open     Open     Closed   Open     Open

      5     Open     Open     Open     Open    Open     Open     Open     Closed   Open

      7     Open     Open     Open     Open    Open     Open     Open     Open    Closed

      10    Open     Open     Open    Closed   Open     Open     Open     Open     Open

      11    Open     Open    Closed    Open    Open     Open     Open     Open     Open

      12    Open    Closed    Open     Open    Open     Open     Open     Open     Open

      15   Closed    Open     Open     Open    Open     Open     Open     Open     Open

                         I/O OPTION CONFIGURATION

     I/O CHRDY       Zero Wait State          JPR               JPS

     Disabled            Disabled            Open              Open

     Disabled            Enabled            Closed             Open

      Enabled            Disabled            Open             Closed

  Note:Zero wait state operation and I/O CHRDY signal cannot be enabled
  at the same time.

                         DIAGNOSTIC LED(S)

    LED        Color      Status               Condition

     L1         Red         On          Data is being received

     L1         Red        Off        Data is not being received

     L1         Red      Blinking        Card is reconfiguring

     L2        Green        On         Data is being transmitted

     L2        Green       Off       Data is not being transmitted

     L2        Green     Blinking        Card is reconfiguring

