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LANCARD/A*PC TP

TIARA COMPUTER SYSTEMS, INC.

LANCARD/A*PC TP

NIC Type

ARCnet

Network Transfer Rate

2.5Mbps

Data Bus

8-bit ISA

Topology

Ring/Daisy Chain/Star

Wiring Type

Unshielded twisted pair

Boot ROM

Available

CONNECTIONS

Function

Label

Function

Label

Unshielded twisted pair port

CN1

Unshielded twisted pair port

CN2

USER CONFIGURABLE SETTINGS

Function

Label

Position

Enhanced mode diagnostic disabled

JP7

Pins 1 & 2 closed

 

Enhanced mode diagnostic enabled

JP7

Pins 2 & 3 closed

Terminator Resistor disabled

JP8

Pins 2 & 3 closed

 

Terminator Resistor enabled

JP8

Pins 1 & 2 closed

BASE I/O ADDRESS SELECTION

Address

SW1/1

SW1/2

SW1/3

 

260h-26Fh

Off

Off

Off

 

290h-29Fh

Off

Off

On

 

2B0h-2BFh

Off

On

On

2E0h-2EFh

Off

On

Off

 

300h-30Fh

On

Off

Off

 

350h-35Fh

On

Off

On

 

380h-38Fh

On

On

Off

 

3E0h-3EFh

On

On

On

INTERRUPT SELECTION

IRQ

JP1

JP2

JP3

JP4

JP5

JP6

2

Closed

Open

Open

Open

Open

Open

 

3

Open

Closed

Open

Open

Open

Open

 

4

Open

Open

Closed

Open

Open

Open

 

5

Open

Open

Open

Closed

Open

Open

 

6

Open

Open

Open

Open

Closed

Open

 

7

Open

Open

Open

Open

Open

Closed

 

NODE ADDRESS

Node

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

SW2/8

1

Off

Off

Off

Off

Off

Off

Off

On

2

Off

Off

Off

Off

Off

Off

On

Off

3

Off

Off

Off

Off

Off

Off

On

On

4

Off

Off

Off

Off

Off

On

Off

Off

5

Off

Off

Off

Off

Off

On

Off

On

251

On

On

On

On

On

Off

On

On

252

On

On

On

On

On

On

Off

Off

253

On

On

On

On

On

On

Off

On

254

On

On

On

On

On

On

On

Off

255

On

On

On

On

On

On

On

On

Note: 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 8=1, 7=2, 6=4, 5=8, 4=16, 3=32, 2=64, 1=128. Turn on the switches and add the values of the on switches to obtain the correct node address. (On=1, Off=0)

ROM ADDRESS SELECTION

Address

SW1/4

SW1/5

SW1/6

 

C0000h-C3FFFh

Off

Off

Off

 

C4000h-C7FFFh

Off

Off

On

 

CC000h-CFFFFh

Off

On

On

D0000h-D3FFFh

On

Off

Off

 

D4000h-D7FFFh

On

Off

On

 

D8000h-DBFFFh

On

On

Off

 

DC000h-DFFFFh

On

On

On

 

E0000h-E3FFFh

Off

On

Off

CABLE LENGTH AND RESPONSE/RECONFIGURATION TIMEOUTS

Maximum Length

Response Time

Reconfiguration Time

SW1/7

SW1/8

4.8 miles

74.4Ás

840ms

On

On

 

21.0 miles

283.4Ás

1680ms

On

Off

 

42.5 miles

561.8Ás

1680ms

Off

On

 

85.6 miles

1118.6Ás

1680ms

Off

Off

Note: Maximum length is the distance between the two farthest cards on the network. All cards on a segment must have this option set the same.

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

LED1

Red

On

Data is being received

LED1

Red

Blinking

Reconfiguring network

LED1

Red

Off

Data is not being received

LED2

Green

On

Data is being transmitted

LED2

Green

Blinking

Reconfiguring network

LED2

Green

Off

Data is not being transmitted

Note: If blinking persists it indicates a network problem.

TECHNICAL NOTE

Note: The last node of the chain needs to be terminated.