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

[Image]

                                 BOOT ROM

                 Setting                               JP2/I

  »               Disabled                             Open

                   Enabled                            Closed

                                CABLE TYPE

             Type                      JP3                    JP4

  »        Thin Ethernet        Pins 1 & 2 closed      Pins 1 & 2 closed

         Unshielded twisted     Pins 2 & 3 closed      Pins 2 & 3 closed
               pair

                            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