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ARCNET PLUS

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

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 disabled

JP7

Closed

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.