
TIARA COMPUTER SYSTEMS, INC.

LANCARD/A*PC TP

NIC Type              ARCnet
Network Transfer Rate 2.5Mbps
Data Bus              8-bit ISA
Topology              Ring/Daisy Chain/Star
Wiring Type           Unshielded twisted pair
Boot ROM              Available

[Image]

                                CONNECTIONS

          Function            Label            Function            Label

  Unshielded twisted pair      CN1     Unshielded twisted pair      CN2
  port                                 port

                        USER CONFIGURABLE SETTINGS

                   Function                      Label        Position

     Enhanced mode diagnostic disabled           JP7        Pins 1 & 2
                                                               closed

      Enhanced mode diagnostic enabled            JP7        Pins 2 & 3
                                                               closed

     Terminator Resistor disabled                JP8        Pins 2 & 3
                                                               closed

      Terminator Resistor enabled                 JP8        Pins 1 & 2
                                                               closed

                        BASE I/O ADDRESS SELECTION

         Address               SW1/1            SW1/2           SW1/3

          260h-26Fh             Off              Off             Off

          290h-29Fh             Off              Off             On

          2B0h-2BFh             Off              On              On

         2E0h-2EFh             Off              On              Off

          300h-30Fh             On               Off             Off

          350h-35Fh             On               Off             On

          380h-38Fh             On               On              Off

          3E0h-3EFh             On               On              On

                            INTERRUPT SELECTION

   IRQ       JP1        JP2        JP3       JP4        JP5        JP6

     2     Closed      Open      Open       Open      Open        Open

      3      Open      Closed     Open       Open      Open        Open

      4      Open       Open     Closed      Open      Open        Open

      5      Open       Open      Open      Closed     Open        Open

      6      Open       Open      Open       Open     Closed       Open

      7      Open       Open      Open       Open      Open       Closed



                               NODE ADDRESS

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

   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

   5      Off     Off      Off     Off     Off      On      Off      On

  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: 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)

                           ROM ADDRESS SELECTION

          Address                SW1/4           SW1/5          SW1/6

          C0000h-C3FFFh           Off             Off            Off

          C4000h-C7FFFh           Off             Off             On

          CC000h-CFFFFh           Off             On              On

         D0000h-D3FFFh            On             Off            Off

          D4000h-D7FFFh            On             Off             On

          D8000h-DBFFFh            On             On             Off

          DC000h-DFFFFh            On             On              On

          E0000h-E3FFFh           Off             On             Off

            CABLE LENGTH AND RESPONSE/RECONFIGURATION TIMEOUTS

     Maximum        Response       Reconfiguration     SW1/7      SW1/8
     Length           Time              Time

     4.8 miles      74.4s            840ms             On         On

         21.0        283.4s           1680ms            On        Off
        miles

         42.5        561.8s           1680ms           Off         On
        miles

         85.6       1118.6s           1680ms           Off        Off
        miles

            Note: Maximum length is the distance between the two farthest
            cards on the network. All cards on a segment must have this
            option set the same.

                         DIAGNOSTIC LED(S)

    LED        Color      Status               Condition

    LED1        Red         On          Data is being received

    LED1        Red      Blinking        Reconfiguring network

    LED1        Red        Off        Data is not being received

    LED2       Green        On         Data is being transmitted

    LED2       Green     Blinking        Reconfiguring network

    LED2       Green       Off       Data is not being transmitted

  Note: If blinking persists it indicates a network problem.

                       TECHNICAL NOTE

  Note: The last node of the chain needs to be terminated.

