
COMPEX, INC.

ANET-4 (VER. 1.0)

NIC Type              ArcNet
Chip Set              NCR 90C26
Data Bus              8-bit ISA
Network Transfer Rate 2.5Mbps x 4
Topology              Star
Wiring Type           RG-62A/U 93ohm coaxial
Boot ROM              Available

[Image]

                                CONNECTIONS

         Function            Label            Function             Label

  RG-62A/U 93ohm coaxial      CN1      RG-62A/U 93ohm coaxial       CN4
  connector                            connector

  RG-62A/U 93ohm coaxial      CN2      Daisy-chain connector        J1
  connector

  RG-62A/U 93ohm coaxial      CN3
  connector

                       EXTENDED RANGE CONFIGURATION

   Response Time        Recon Time           JP1               JP2

      75.7 uS             840 mS            Open               Open

      283.4 uS            1.68 S           Closed              Open

      561.8 uS            1.68 S            Open              Closed

     1.1186 mS            1.68 S           Closed             Closed

            Note:This setting should only be changed when the length of
            the ArcNet segments exceed 6000 meters.

                               NODE ADDRESS

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

    1        On     Off     Off     Off     Off     Off     Off      Off

    2       Off      On     Off     Off     Off     Off     Off      Off

    3        On      On     Off     Off     Off     Off     Off      Off

    4       Off     Off      On     Off     Off     Off     Off      Off

    5        On     Off      On     Off     Off     Off     Off      Off

   250      Off      On     Off      On      On      On      On      On

   251       On      On     Off      On      On      On      On      On

   252      Off     Off      On      On      On      On      On      On

   253       On     Off      On      On      On      On      On      On

   254      Off      On      On      On      On      On      On      On

            Note: A total of 253 node address settings are available. The
            switches are a binary representation of the decimal node
            addresses. SW1/8 is the Most Significant Bit and switch SW1/1
            is the Least Significant Bit. The switches have the following
            decimal values: SW1/8=128, SW1/7=64, SW1/6=32, SW1/5=16,
            SW1/4=8, SW1/3=4, SW1/2=2, SW1/1=1. Turn off the switches and
            add the values of the switches that are off to obtain the
            correct node address. (Off=1, On=0)

            Addresses 0 and 255 are reserved and should not be used.

                             BASE I/O ADDRESS

  Setting      JP4/A     JP4/B     JP4/C      JP4/D     JP4/E     JP4/F

      000h     Open       Open      Open      Open      Open       Open

      010h    Closed      Open      Open      Open      Open       Open

      020h     Open      Closed     Open      Open      Open       Open

      030h    Closed     Closed     Open      Open      Open       Open

      040h     Open       Open     Closed     Open      Open       Open

      3B0h    Closed     Closed     Open     Closed    Closed     Closed

      3C0h     Open       Open     Closed    Closed    Closed     Closed

      3D0h    Closed      Open     Closed    Closed    Closed     Closed

     3E0h     Open      Closed    Closed    Closed    Closed     Closed

      3F0h    Closed     Closed    Closed    Closed    Closed     Closed

            Note: A total of 64 base address settings are available. The
            jumpers are a binary representation of the decimal memory
            addresses. JP4/A is the Least Significant Bit and jumper
            JP4/F is the Most Significant Bit. The jumpers have the
            following decimal values: JP4/F=512, JP4/E=256, JP4/D=128,
            JP4/C=64, JP4/B=32, JP4/A=16. Close the jumpers and add the
            values of the jumpers that are closed to obtain the correct
            memory address. (Closed=1, Open=0)

                            SHARED RAM ADDRESS

    Setting        JP5/A       JP5/B      JP5/C       JP5/D       JP5/E

       00000h       Open       Open        Open       Open        Open

       08000h      Closed      Open        Open       Open        Open

       10000h       Open      Closed       Open       Open        Open

       18000h      Closed     Closed       Open       Open        Open

       20000h       Open       Open       Closed      Open        Open

      D0000h      Closed      Open       Closed      Open        Open

       D8000h      Closed     Closed       Open      Closed      Closed

       E0000h       Open       Open       Closed     Closed      Closed

       E8000h      Closed      Open       Closed     Closed      Closed

       F0000h       Open      Closed      Closed     Closed      Closed

       F8000h      Closed     Closed      Closed     Closed      Closed

            Note: A total of 32 base address settings are available. The
            jumpers are a binary representation of the decimal memory
            addresses. JP5/A is the Least Significant Bit and jumper
            JP5/E is the Most Significant Bit. The jumpers have the
            following decimal values: JP5/E=524288, JP5/D=262144,
            JP5/C=131072, JP5/B=65536, JP5/A=32768. Close the jumpers and
            add the values of the jumpers that are closed to obtain the
            correct memory address. (Closed=1, Open=0)

                            INTERRUPT

  Setting     JP3/A      JP3/B      JP3/C      JP3/D     JP3/E

     2       Closed      Open       Open       Open       Open

     3        Open      Closed      Open       Open       Open

     4        Open       Open      Closed      Open       Open

     5        Open       Open       Open      Closed      Open

     7        Open       Open       Open       Open      Closed

                       MISCELLANEOUS TECHNICAL NOTE

  The daisy-chain connector may be used to connect up to three extender
  cards for a total of 12 ports. For additional information see document
  N1769.

