
STANDARD MICROSYSTEMS CORPORATION

ARCNET PC120

EAGLE TECHNOLOGIES

RX-NET II

NIC Type      ARCnet
Transfer Rate 2.5Mbps
Data Bus      8-bit ISA
Topology      Star
Wiring Type   RG-62A/U 93ohm coaxial
Boot ROM      Available

[Image]

                          NODE ADDRESS SELECTION

  Node   SW3/1    SW3/2   SW3/3   SW3/4    SW3/5   SW3/6    SW3/7   SW3/8

   0       -       -        -       -       -        -       -        -

   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

  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: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
       1 is the Least Significant Bit and switch 8 is the Most
       Significant Bit. The switches have the following decimal values:
       switch 1=1, 2=2, 3=4, 4=8, 5=16, 6=32, 7=64, 8=128. Turn off the
       switches and add the values of the off switches to obtain the
       correct node address. (On=0, Off=1)

                   INTERRUPT REQUEST SELECTION

    IRQ        JP1        JP2        JP3        JP4       JP5

     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

                      I/O BASE ADDRESS SELECTION

  Address    SW2/1     SW2/2     SW2/3     SW2/4     SW2/5     SW2/6

   200h       Off        On        On        On        On        On

   250h       Off        On        On       Off        On       Off

   2A0h       Off        On       Off        On       Off        On

   2E0h       Off        On       Off       Off       Off        On

   2F0h       Off        On       Off       Off       Off       Off

   300h       Off       Off        On        On        On        On

   350h       Off       Off        On       Off        On       Off

   3E0h       Off       Off       Off       Off       Off       Off

                       BUFFER ADDRESS SELECTION

  Address    SW1/1     SW1/2     SW1/3     SW1/4     SW1/5     SW1/6

  C0000h      Off       Off        On        On        On        On

  C4000h      Off       Off        On        On        On       Off

  C8000h      Off       Off        On        On        On        On

  CC000h      Off       Off        On        On       Off       Off

  D0000h      Off       Off        On       Off        On        On

  D4000h      Off       Off        On       Off        On        On

  D8000h      Off       Off        On       Off       Off        On

  DC000h      Off       Off        On       Off       Off       Off

  E0000h      Off       Off       Off        On        On        On

  FACTORY CONFIGURED SETTINGS

     Switch         Setting

     SW1/7             On

     SW1/8             On

