
DATAPOINT CORPORATION

ARCNET PLUS

NIC Type      ARCnet
Transfer Rate 2.5Mbps/20Mbps
Data Bus      16-bit ISA
Topology      Star

              Linear bus
Wiring Type   RG-62A/U 93ohm coaxial
Boot ROM      Available

[Image]

                        CONNECTIONS

  Purpose                                     Location

  Coaxial connector for internal PC hub          J9

                          BOOT ROM CONFIGURATION

                 Setting                                S1/1

                  Disabled                             Off

                   Enabled                               On

                             BLOCK DECODE SIZE

               Block Size                               S1/2

          16KB memory block decode                      On

           128KB memory block decode                    Off

            Note:A 16-bit VGA adapter typically decodes base memory in
            128KB blocks. If you are installing the NIC in a system with
            such a card, you may need to set the NIC block decode size to
            128KB. If you set the block decode size to 128KB then all
            other 16-bit cards in the system must utilize 128KB decode.

            NIC must be in 16-bit mode for this switch to be functional.

               ARCNET MODE CONFIGURATION

            Mode                       S1/3

       Normal ARCnet                    On

  Enhanced ARCnetPlus mode              Off

                               DATA BUS SIZE

                  Size                                 S1/4

                    8-bit                               Off

                  16-bit                               On

                             INTERRUPT REQUEST

       IRQ             S2/1          S2/2          S2/3          S2/4

         2/9           On           Off            On            On

           3           Off           Off            On            On

           4            On            On           Off            On

           5           Off            On           Off            On

           7           Off           Off           Off            On

          10            On           Off            On            Off

          11           Off           Off            On            Off

          14            On           Off           Off            Off

          15           Off           Off           Off            Off

                             I/O BASE ADDRESS

  Address     S3/1   S3/2    S3/3    S3/4    S3/5   S3/6    S3/7    S3/8

      260h     On     Off     Off     On      On     Off     On      On

      290h    Off     On      On     Off      On     Off     On      On

      2C0h     On     On      Off    Off      On     Off     On      On

      2D0h    Off     On      Off    Off      On     Off     On      On

     2E0h     On     Off     Off    Off      On     Off     On      On

      2F0h    Off     Off     Off    Off      On     Off     On      On

      300h     On     On      On      On     Off     Off     On      On

      310h    Off     On      On      On     Off     Off     On      On

      320h     On     Off     On      On     Off     Off     On      On

      350h    Off     On      Off     On     Off     Off     On      On

      380h     On     On      On     Off     Off     Off     On      On

      3E0h     On     Off     Off    Off     Off     Off     On      On

                            BASE MEMORY ADDRESS

      Base         S4/3     S4/4      S4/5     S4/6      S4/7      S4/8

       C0000h       On       On        On       On        Off       Off

       C4000h      Off       On        On       On        Off       Off

       C8000h       On       Off       On       On        Off       Off

       CC000h      Off       Off       On       On        Off       Off

      D0000h       On       On       Off       On        Off       Off

       D4000h      Off       On       Off       On        Off       Off

       D8000h       On       Off      Off       On        Off       Off

       DC000h      Off       Off      Off       On        Off       Off

  Note:S4/1 and S4/2 are not used.

                               NODE ADDRESS

  Node    S5/1    S5/2     S5/3    S5/4    S5/5    S5/6     S5/7    S5/8

   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 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 1=128, 2=64, 3=32, 4=16, 5=8, 6=4, 7=2, 8=1. Turn Off the
       switches and add the values of the Off switches to obtain the
       correct node address. (On=0, Off=1)

                   RESPONSE AND RECONFIGURATION TIMEOUTS

       Timeout                J3               J5               J4

          840ms             Open             Open             Open

         1.68 sec            Open             Open            Closed

         3.36 sec            Open            Closed            Open

         6.72 sec            Open            Closed           Closed

         13.44 sec          Closed            Open             Open

         26.88 sec          Closed            Open            Closed

         53.76 sec          Closed           Closed            Open

        1.7887 min          Closed           Closed           Closed

  Note:All NICs on the network segment must have this option set the
  same.

                              BUFFER RAM SIZE

           Size                     Chip                     W1

              8KB                  8K x 8                   Open

             32KB                 32K x 8                 Closed

                            MICRO-CODE ROM SIZE

                 Size                                  W2

                   4KB                               Open

                    8KB                              Closed

                           LOGIC/CHASSIS GROUND

                 Setting                                 W3

           RFI grounding enabled                      Closed

            RFI grounding disabled                      Open

                        FACTORY CONFIGURED SETTINGS

           Function                  Jumper                Setting

     Factory test mode                JP7                  Closed
      disabled

[Image]

                              DIAGNOSTIC LED

    LED         Color         Status                 Condition

    LED1        Amber           On            PC is currently accessing
                                                    adapter card

    LED1        Amber        Flashing        Initial power-on self test

    LED1        Amber        Pulsating     Software driver initialization

    LED1        Amber           Off         PC to NIC communication idle

    LED2        Green           On            Transmission in progress

    LED2        Green        Flashing         Connection to network in
                                                      progress

    LED2        Green           Off        No network connection, or card
                                                    malfunction

  Note:Location of LED1 is unknown.

