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AT/SD

NIWOT NETWORKS, INC.

AT/SD

Card Type

Serial X.25

Chip Set

Unidentified

Maximum Onboard Memory

32KB DRAM

I/O Options

Serial port

Data Bus

16-bit ISA

Error Correction/Compression

LAPB, LAPD

CONNECTIONS

Function

Label

Function

Label

V.35, RS-232, RS-422, or RS-449 port

J1

Daughterboard header

J3

Daughterboard header

J2

   

USER CONFIGURABLE SETTINGS

Setting

Label

Position

External clock source

SW1/6

On

 

Internal 1.25MHz clock source

SW1/6

Off

 

Node address 1

SW1/8

Off

 

Node address 3

SW1/8

On

Factory configured - do not alter

SW1/5

Off

WAIT STATE

Setting

SW1/4

SW1/7

 

0

On

On

1

On

Off

 

2

Off

On

 

3

Off

Off

DMA CHANNEL

Setting

JP1

JP3

 

0

Pins 13 & 14, 15 & 16 closed

Open

 

1

Open

Pins 5 & 6, 7 & 8 closed

 

3

Open

Pins 1 & 2, 3 & 4 closed

 

5

Pins 9 & 10, 11 & 12 closed

Open

6

Pins 5 & 6, 7 & 8 closed

Open

 

7

Pins 1 & 2, 3 & 4 closed

Open

BASE I/O ADDRESS

Setting

SW1/1

SW1/2

SW1/3

280h

On

On

On

 

290h

On

On

Off

 

2E0h

On

Off

On

 

2F0h

On

Off

Off

 

300h

Off

On

On

 

350h

Off

On

Off

 

380h

Off

Off

On

INTERRUPT

Setting

JP2/A

JP2/B

JP2/C

JP2/D

JP2/E

JP4

2/9

Open

Open

Open

Open

Open

Closed

10

Open

Open

Open

Open

Closed

Open

11

Open

Open

Open

Closed

Open

Open

12

Open

Open

Closed

Open

Open

Open

14

Closed

Open

Open

Open

Open

Open

15

Open

Closed

Open

Open

Open

Open