
SVEC COMPUTER CORPORATION

FD0464B/FD0464C

NIC Type:      ARCnet
Transfer Rate: 2.5Mbps
Data Bus:      16-bit ISA
Topology:      Linear bus (FD0464B only)

               Star
Wiring Type    RG62A/U 93ohm coaxial

               Unshielded twisted pair
Boot ROM       Available

[Image]

                          INTERRUPT SELECT - JP1

     IRQ        Jumper A    Jumper B    Jumper C    Jumper D    Jumper E

      IRQ2      Closed       Open        Open        Open        Open

       IRQ3       Open       Closed       Open        Open        Open

       IRQ4       Open        Open       Closed       Open        Open

       IRQ5       Open        Open        Open       Closed       Open

       IRQ7       Open        Open        Open        Open       Closed

                                 BOOT ROM

                 Setting                                JP2

                 Disabled                             Open

                   Enabled                            Closed

                                WIRING TYPE

         Setting               JP3/jumper A             JP3/jumper B

    Unshielded twisted      Pins 1 & 2 closed        Pins 1 & 2 closed
          pair

  RG62A/U 93ohm coaxial     Pins 2 & 3 closed        Pins 2 & 3 closed

  Note:This table applies only to the FD0464B.

                    TOPOLOGY

        Setting                    JP4

          Star                   Closed

       Linear bus                 Open

  Note:This table applies only to the FD0464B.

                              MEMORY ADDRESS

  RAM Address       ROM       SW1/1    SW1/2    SW1/3    SW1/4     SW1/5
                  Address

     D0000h      D2000h       On        On      Off      Off       On

      C0000h      C2000h       On        On       On       On       On

      C0800h      C2000h       Off       On       On       On       On

      C1000h      C2000h       On       Off       On       On       On

      C1800h      C2000h       Off      Off       On       On       On

      C4000h      C6000h       On        On      Off       On       On

      C4800h      C6000h       Off       On      Off       On       On

      C5000h      C6000h       On       Off      Off       On       On

      C5800h      C6000h       Off      Off      Off       On       On

      CC000h      CE000h       On        On       On      Off       On

      CC800h      CE000h       Off       On       On      Off       On

      CD000h      CE000h       On       Off       On      Off       On

      CD800h      CE000h       Off      Off       On      Off       On

      D0800h      D2000h       Off       On      Off      Off       On

      D1000h      D2000h       On       Off      Off      Off       On

      D1800h      D2000h       Off      Off      Off      Off       On

      D4000h      D6000h       On        On       On       On       Off

      D4800h      D6000h       Off       On       On       On       Off

      D5000h      D6000h       On       Off       On       On       Off

      D5800h      D6000h       Off      Off      Off       On       Off

      D4000h      D6000h       On        On       On       On       Off

      D4800h      D6000h       Off       On       On       On       Off

      D5000h      D6000h       On       Off       On       On       Off

      D5800h      D6000h       Off      Off      Off       On       Off

      D4000h      D6000h       On        On       On       On       Off

      D4800h      D6000h       Off       On       On       On       Off

      D5000h      D6000h       On       Off       On       On       Off

      D5800h      D6000h       Off      Off      Off       On       Off

      E0000h      E2000h       On        On      Off      Off       Off

      E0800h      E2000h       Off       On      Off      Off       Off

      E1000h      E2000h       On       Off      Off      Off       Off

      E1800h      E2000h       Off      Off      Off      Off       Off

                                I/O ADDRESS

       Address             SW1/6             SW1/7             SW1/8

          2E0h              On               Off               On

           260h              On                On               On

           290h             Off                On               On

           2E0h              On               Off               On

           2F0h             Off               Off               On

           300h              On                On               Off

           350h             Off                On               Off

           380h              On               Off               Off

           3E0h             Off               Off               Off

                              NODE ID NUMBER

  ID    SW2/1    SW2/2   SW2/3   SW2/4    SW2/5   SW2/6    SW2/7   SW2/8
  #

  255    Off     Off      Off     Off     Off      Off     Off      Off

  35     Off     Off      On      On       On      Off      On       On

  1      Off      On      On      On       On      On       On       On

  Note:Nodes can be numbered from 1 to 255. The switches are a binary
  representation of the node numbers. When a switch is off, the
  corresponding bit is set to 1 and has the following decimal value:
  SW2/1=1, SW2/2=2, SW2/3=4, SW2/4=8, SW2/5=16, SW2/6=32, SW2/7=64,
  SW2/8=128.

                              DIAGNOSTIC LED

        Status                              Condition

          On               Network connected successfully/data is being
                                     transmitted or received

         Off              Power off/network not connected successfully

         Dim                      Heavy data traffic on network

                     CONNECTORS

         Purpose                  Location

  External LED connector             JP5

                       MISCELLANEOUS TECHNICAL NOTES

      The FD0464C is equipped with an RG62A/U 93ohm connector for star
                              topology only.

