AT-LAN-TEC, INC.

8-BIT COAX ARCNET

NIC Type      ARCnet
Transfer Rate 2.5Mbps
Data Bus      8-bit ISA
Topology      Linear bus

              Star
Wiring Type   RG62A/U 93ohm 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      On       On      On      On       On      On       On      Off

   2      On       On      On      On       On      On      Off      On

   3      On       On      On      On       On      On      Off      Off

   4      On       On      On      On       On      Off      On      On

  251     Off     Off      Off     Off     Off      On      Off      Off

  252     Off     Off      Off     Off     Off      Off      On      On

  253     Off     Off      Off     Off     Off      Off      On      Off

  254     Off     Off      Off     Off     Off      Off     Off      On

  255     Off     Off      Off     Off     Off      Off     Off      Off

       Note:Node address 0 is reserved 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 most
       significant bit and switch 8 the least significant bit. The
       switches have the following decimal values: switch 1=128, switch
       2=64, switch 3=32, switch 4=16, switch 5=8, switch 6=4, switch
       7=2, switch 8=1. Turn off the appropriate switches and add the
       values of the ‘off’ switches to obtain the correct node address.

                           MEMORY ADDRESS SELECT

  RAM Address    ROM Address    SW2/4    SW2/5    SW2/6    SW2/7   SW2/8

    C0000 -         C2000 -       On       On      On       On       On
    C07FFh          C3FFFh

    C0800 -         C2000 -       On       On      On       On      Off
    C0FFFh          C3FFFh

    C1000 -         C2000 -       On       On      On       Off      On
    C17FFh          C3FFFh

    C1800 -         C2000 -       On       On      On       Off     Off
    C1FFFh          C3FFFh

    C4000 -         C6000 -       On       On      Off      On       On
    C47FFh          C7FFFh

    C4800 -         C6000 -       On       On      Off      On      Off
    C4FFFh          C7FFFh

    C5000 -         C6000 -       On       On      Off      Off      On
    C57FFh          C7FFFh

    C5800 -         C6000 -       On       On      Off      Off     Off
    C5FFFh          C7FFFh

    CC000 -         CE000 -       On      Off      On       On       On
    CC7FFh          CFFFFh

    CC800 -         CE000 -       On      Off      On       On      Off
    CCFFFh          CFFFFh

    CD000 -         CE000 -       On      Off      On       Off      On
    CD7FFh          CFFFFh

    CD800 -         CE000 -       On      Off      On       Off     Off
    CDFFFh          CFFFFh

    D0000 -         D2000 -       On      Off      Off      On       On
    D07FFh          D3FFFh

    D0800 -         D2000 -       On      Off      Off      On      Off
    D0FFFh          D3FFFh

    D1000 -         D2000 -       On      Off      Off      Off      On
    D17FFh          D3FFFh

    D1800 -         D2000 -       On      Off      Off      Off     Off
    D1FFFh          D3FFFh

    D4000 -         D6000 -      Off       On      On       On       On
    D47FFh          D7FFFh

    D4800 -         D6000 -      Off       On      On       On      Off
    D4FFFh          D7FFFh

    D5000 -         D6000 -      Off       On      On       Off      On
    D57FFh          D7FFFh

    D5800 -         D6000 -      Off       On      On       Off     Off
    D5FFFh          D7FFFh

    D8000 -         DA000 -      Off       On      Off      On       On
    D87FFh          DBFFFh

    D8800 -         DA000 -      Off       On      Off      On      Off
    D8FFFh          DBFFFh

    D9000 -         DA000 -      Off       On      Off      Off      On
    D97FFh          DBFFFh

    D9800 -         DA000 -      Off       On      Off      Off     Off
    D9FFFh          DBFFFh

    DC000 -         DE000 -      Off      Off      On       On       On
    DC7FFh          DFFFFh

    DC800 -         DE000 -      Off      Off      On       On      Off
    DCFFFh          DFFFFh

    DD000 -         DE000 -      Off      Off      On       Off      On
    DD7FFh          DFFFFh

    DD800 -         DE000 -      Off      Off      On       Off     Off
    DDFFFh          DFFFFh

    E0000 -         E2000 -      Off      Off      Off      On       On
    E07FFh          E3FFFh

    E0800 -         E2000 -      Off      Off      Off      On      Off
    E0FFFh          E3FFFh

    E1000 -         E2000 -      Off      Off      Off      Off      On
    E17FFh          E3FFFh

    E1800 -         E2000 -      Off      Off      Off      Off     Off
    E1FFFh          E3FFFh

                           TIMEOUT CONFIGURATION

  Response Time( m       Reconfiguration          J1/F           J1/G
                           Time(msec)

  »        78                  840                Open           Open

          285                 1680                Open          Closed

          563                 1680               Closed          Open

          1130                1680               Closed         Closed

                                 BOOT ROM

                 Setting                               J1/H

  »               Disabled                             Open

                   Enabled                            Closed

                            I/O ADDRESS SELECT

       Address              SW2/1            SW2/2             SW2/3

  »     2E0 - 2EFh            On              Off               On

        260 - 26Fh            On               On               On

        290 - 29Fh            On               On               Off

        2F0 - 2FFh            On              Off               Off

        300 - 30Fh           Off               On               On

        350 - 35Fh           Off               On               Off

        380 - 38Fh           Off              Off               On

        3E0 - 3EFh           Off              Off               Off

                             INTERRUPT SELECT

     IRQ          J1/A        J1/B        J1/C        J1/D        J1/E

  »    IRQ3       Open       Closed       Open        Open        Open

       IRQ2      Closed       Open        Open        Open        Open

       IRQ4       Open        Open       Closed       Open        Open

       IRQ5       Open        Open        Open       Closed       Open

       IRQ7       Open        Open        Open        Open       Closed

                       MISCELLANEOUS TECHNICAL NOTE

       Note:The 8-bit COAX ARCnet supports either linear bus or star
              topologies, depending on the version purchased.