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AL-2351

EDIMAX COMPUTER COMPANY

AL-2351

NIC Type

Arcnet

Transfer Rate

2.5Mbps

Data Bus

8-bit ISA

Topology

Linear bus

Star

Wiring Type

Unshielded twisted pair

RG-62A/U 93ohm coaxial

Boot ROM

Available

NODE ADDRESS SELECTION

Address

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

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

5

Off

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: A total of 255 node address settings are available. The switches are a binary representation of the decimal node addresses. Switch SW1/1 is the Least Significant Bit and switch SW1/8 is the Most Significant Bit. The switches have the following decimal values: jumper SW1/1=1, SW1/2=2, SW1/=4, SW1/4=8, SW1/5=16, SW1/6=32, SW1/7=64, SW1/8=128.Open the switches and add the values of the off switches to obtain the correct node address. (On=0, Off=1)

TOPOLOGY

Topology

W5/1

W5/2

W5/3

W5/4

 

Star

Closed

Open

Open

Open

 

Linear bus

Open

Closed

Open

Open

Linear bus

Open

Open

Closed

Closed

BASE I/O ADDRESS SELECTION

Address

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

2E0h

Off

On

Off

Off

Off

On

 

2F0h

Off

On

Off

Off

Off

Off

 

300h

Off

Off

On

On

On

On

 

200h

Off

On

On

On

On

On

 

210h

Off

On

On

On

On

Off

 

220h

Off

On

On

On

Off

On

 

230h

Off

On

On

On

Off

Off

 

240h

Off

On

On

Off

On

On

 

3B0h

Off

Off

Off

On

Off

Off

 

3C0h

Off

Off

Off

Off

On

On

 

3D0h

Off

Off

Off

Off

On

Off

 

3E0h

Off

Off

Off

Off

Off

On

 

3F0h

Off

Off

Off

Off

Off

Off

Note: Addresses from 0h to 3F0h are possible, but those below 200h are not normally used. The sum of SW1/1 and SW1/2 represent the first digit. The sum of SW1/3-6 represent the second digit. The last digit is always zero. SW1/1=200h, SW1/2=100h, SW1/3=80h, SW1/4=40h, SW1/5=20h, SW/6=10h.

INTERRUPT SELECTION

IRQ

W3

Com 9026 INTR set to IRQ 2

Pins 1-2 closed

 

Com 9026 INTR set to IRQ 3

Pins 2-5 closed

 

Com 9026 INTR set to IRQ 4

Pins 8-9 closed

 

Com 9026 INTR set to IRQ 5

Pins 7-8 closed

 

Com 9026 INTR set to IRQ 7

Pins 8-11 closed

 

8253 Timeout 1 set to IRQ2

Pins 3-6 closed

 

8253 Timeout 0 set to IRQ3

Pins 5-6 closed

 

8253 Timeout 0 set to IRQ4

Pins 6-9 closed

 

8253 Timeout 0 set to IRQ5

Pins 7-10 closed

 

8253 Timeout 0 set to IRQ7

Pins 10-11 closed

 

8253 Timeout 0 set to IRQ2

Pins 1-4 closed

 

8253 Timeout 0 set to IRQ3

Pins 4-5 closed

 

8253 Timeout 0 set to IRQ4

Pins 9-12 closed

 

8253 Timeout 0 set to IRQ5

Pins 4-7 closed

 

8253 Timeout 0 set to IRQ7

Pins 11-12 closed

RESPONSE/RECONFIGURATION

Time

W1

W2

74.7 m Sec/840 mSec

Open

Open

 

383.4 m Sec/1680 mSec

Closed

Open

 

561.8 m Sec/1680 mSec

Open

Closed

 

11118.6 m Sec/1680 mSec

Closed

Closed

BASE MEMORY ADDRESS SELECTION

Address

SW2/7

SW2/8

SW2/9

SW2/10

D000h

Off

Off

On

On

 

0000h

On

On

On

On

 

1000h

On

On

On

Off

 

2000h

On

On

Off

On

 

3000h

On

On

Off

Off

 

4000h

On

Off

On

On

 

5000h

On

Off

On

Off

 

B000h

Off

On

Off

Off

 

C000h

Off

Off

On

On

 

E000h

Off

Off

Off

On

 

F000h

Off

Off

Off

Off

DIAGNOSTIC LED(S)

Status

Condition

On

Network connection is good

Off

Network connection is broken

Blinking

Data is being transmitted/received