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ARCNET PC550

STANDARD MICROSYSTEMS CORPORATION

ARCNET PC550

NIC Type

ARCnet

Transfer Rate

2.5Mbps

Data Bus

16-bit ISA

Topology

Star

Wiring Type

Unshielded twisted pair

Boot ROM

Not available

NODE ADDRESS

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)

I/O BASE ADDRESS

Address

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

300h

On

On

On

On

Off

Off

 

200h

On

On

On

On

On

Off

 

210h

Off

On

On

On

On

Off

 

220h

On

Off

On

On

On

Off

 

230h

Off

Off

On

On

On

Off

 

240h

On

On

Off

On

On

Off

 

250h

Off

On

Off

On

On

Off

 

260h

On

Off

Off

On

On

Off

 

270h

Off

Off

Off

On

On

Off

 

280h

On

On

On

Off

On

Off

 

290h

Off

On

On

Off

On

Off

 

2A0h

On

Off

On

Off

On

Off

 

2B0h

Off

Off

On

Off

On

Off

 

2C0h

On

On

Off

Off

On

Off

 

2D0h

Off

On

Off

Off

On

Off

 

2E0h

On

Off

Off

Off

On

Off

 

2F0h

Off

Off

Off

Off

On

Off

 

310h

Off

On

On

On

Off

Off

 

320h

On

Off

On

On

Off

Off

 

330h

Off

Off

On

On

Off

Off

 

340h

On

On

Off

On

Off

Off

 

350h

Off

On

Off

On

Off

Off

 

360h

On

Off

Off

On

Off

Off

 

370h

Off

Off

Off

On

Off

Off

 

380h

On

On

On

Off

Off

Off

 

390h

Off

On

On

Off

Off

Off

 

3A0h

On

Off

On

Off

Off

Off

 

3B0h

Off

Off

On

Off

Off

Off

 

3C0h

On

On

Off

Off

Off

Off

 

3D0h

Off

On

Off

Off

Off

Off

 

3E0h

On

Off

Off

Off

Off

Off

 

3F0h

Off

Off

Off

Off

Off

Off

FACTORY CONFIGURED SETTINGS

Switch

Setting

SW2/1

On

SW2/2

On

SW2/3

Off

SW2/4

On

SW2/5

On

SW2/6

On

INTERRUPT REQUEST

IRQ

SW1/7

SW1/8

SW1/9

SW1/10

2/9

Off

On

On

Off

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

12

On

On

Off

Off

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

LED1

Green

On

Data is being transmitted or received

LED1

Green

Blinking

Network is reconfiguring

LED2

Red

On

I/O bus activity detected

LED2

Red

Off

No I/O bus activity detected