
EVEREX SYSTEMS, INC.

SPEEDARC (VER.1.0)

NIC Type              ARCnet
Network Transfer Rate 2.5Mbps
Data Bus              8-bit ISA
Topology              Linear Bus
Wiring Type           RG-58A/U 50ohm coaxial
Boot ROM              Available (location unidentified)

[Image]

                         CONNECTIONS

           Function                        Label

  RG-58A/U 50ohm coaxial port               CN1

          BASE I/O ADDRESS SELECTION

  Address      JP2/6       JP2/7      JP2/8

  260-26Fh      On          On          On

  290-29Fh      On          On         Off

  2E0-2EFh      On          Off         On

  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 SELECTION

    IRQ         JP1/A       JP1/B        JP1/C       JP1/D        JP1/E

       2       Open         Open        Open         Open       Closed

        3       Open         Open        Open        Closed       Open

        4       Open         Open       Closed        Open        Open

        5       Open        Closed       Open         Open        Open

        7      Closed        Open        Open         Open        Open

                               NODE ADDRESS

  Node   JP/1    JP1/2   JP1/3   JP1/4    JP1/5   JP1/6    JP1/7   JP1/8

   1     Off      On      On      On       On      On       On       On

   2      On     Off      On      On       On      On       On       On

   3     Off     Off      On      On       On      On       On       On

   4      On      On      Off     On       On      On       On       On

   5     Off      On      Off     On       On      On       On       On

  251    Off     Off      On      Off     Off      Off     Off      Off

  252     On      On      Off     Off     Off      Off     Off      Off

  253    Off      On      Off     Off     Off      Off     Off      Off

  254     On     Off      Off     Off     Off      Off     Off      Off

  255    Off     Off      Off     Off     Off      Off     Off      Off

            Note: A total of 255 node address settings are available. The
            switches are a binary representation of the decimal memory
            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 to obtain the correct memory
            address.

                          BOOT ROM CONFIGURATION

                 Setting                               JP1/H

                 Disabled                             Open

                   Enabled                            Closed

                        EXTENDED TIMEOUTS SELECTION

    Response       Idle       Reconfiguration       JP1/F        JP1/G
     Time          Time            Time

        78         86              840             Open          Open

        285        316             1680             Open         Closed

        563        624             1680            Closed         Open

        1130       1237            1680            Closed        Closed

                        RAM/PROM ADDRESS SELECTION

   RAM Address        PROM     JP2/1    JP2/2    JP2/3    JP2/4    JP2/5
                    Address

      C:0000h -    C:2000h -     On       On       On       On       On
       C:07FFh      C:3FFFh

      C:0800h -    C:2000h -     On       On       On       On      Off
       C:0FFFh      C:3FFFh

      C:1000h -    C:2000h -     On       On       On      Off       On
       C:17FFh      C:3FFFh

      C:1800h -    C:2000h -     On       On       On      Off      Off
       C:1FFFh      C:3FFFh

      C:4000h -    C:6000h -     On       On      Off       On       On
       C:47FFh      C:7FFFh

      C:4800h -    C:6000h -     On       On      Off       On      Off
       C:4FFFh      C:7FFFh

      C:5000h -    C:6000h -     On       On      Off      Off       On
       C:57FFh      C:7FFFh

      C:5800h -    C:6000h -     On       On      Off      Off      Off
       C:5FFFh      C:7FFFh

      C:C000h -    C:E000h -     On      Off       On       On       On
       C:C7FFh      C:FFFFh

      C:C800h -    C:E000h -     On      Off       On       On      Off
       C:CFFFh      C:FFFFh

      C:D000h -    C:E000h -     On      Off       On      Off       On
       C:D7FFh      C:FFFFh

      C:D800h -    C:E000h -     On      Off       On      Off      Off
       C:DFFFh      C:FFFFh

     D:0000h -    D:2000h -     On      Off      Off       On       On
       D:07FFh      D:3FFFh

      D:0800h -    D:2000h -     On      Off      Off       On      Off
       D:0FFFh      D:3FFFh

      D:1000h -    D:2000h -     On      Off      Off      Off       On
       D:17FFh      D:3FFFh

      D:1800h -    D:2000h -     On      Off      Off      Off      Off
       D:1FFFh      D:3FFFh

      D:4000h -    D:6000h -    Off       On       On       On       On
       D:47FFh      D:7FFFh

      D:4800h -    D:6000h -    Off       On       On       On      Off
       D:4FFFh      D:7FFFh

      D:5000h -    D:6000h -    Off       On       On      Off       On
       D:57FFh      D:7FFFh

      D:5800h -    D:6000h -    Off       On       On      Off      Off
       D:5FFFh      D:7FFFh

      D:8000h -    D:A000h -    Off       On      Off       On       On
       D:87FFh      D:BFFFh

      D:8800h -    D:A000h -    Off       On      Off       On      Off
       D:8FFFh      D:BFFFh

      D:9000h -    D:A000h -    Off       On      Off      Off       On
       D:97FFh      D:BFFFh

      D:9800h -    D:A000h -    Off       On      Off      Off      Off
       D:9FFFh      D:BFFFh

      D:C000h -    D:E000h -    Off      Off       On       On       On
       D:C7FFh      D:FFFFh

      D:C800h -    D:E000h -    Off      Off       On       On      Off
       D:CFFFh      D:FFFFh

      D:D000h -    D:E000h -    Off      Off       On      Off       On
       D:D7FFh      D:FFFFh

      D:D800h -    D:E000h -    Off      Off       On      Off      Off
       D:DFFFh      D:FFFFh

      E:0000h -    E:2000h -    Off      Off      Off       On       On
       E:07FFh      E:3FFFh

      E:0800h -    E:2000h -    Off      Off      Off       On      Off
       E:0FFFh      E:3FFFh

      E:1000h -    E:2000h -    Off      Off      Off      Off       On
       E:17FFh      E:3FFFh

      E:1800h -    E:2000h -    Off      Off      Off      Off      Off
       E:1FFFh      E:3FFFh

