GATEWAY COMMUNICATIONS, INC.

G/ETHERTWIST AT, AT-WS ADAPTER (NATIONAL CHIPSET)

NIC Type

Ethernet

Transfer Rate

10Mbps

Data Bus

16-bit ISA

Topology

Star

Wiring Type

Shielded twisted pair

Unshielded twisted pair

AUI transceiver via DB-15 port

Boot ROM

Available

INTERRUPT REQUEST

IRQ

JP3

JP4

JP5

JP6

JP7

JP8

JP9

JP10

JP11

JP12

»

3

Open

Open

Open

Open

Open

Open

Open

Open

Closed

Open

 

15

Closed

Open

Open

Open

Open

Open

Open

Open

Open

Open

 

12

Open

Closed

Open

Open

Open

Open

Open

Open

Open

Open

 

11

Open

Open

Closed

Open

Open

Open

Open

Open

Open

Open

 

10

Open

Open

Open

Closed

Open

Open

Open

Open

Open

Open

 

7

Open

Open

Open

Open

Closed

Open

Open

Open

Open

Open

 

6

Open

Open

Open

Open

Open

Closed

Open

Open

Open

Open

 

5

Open

Open

Open

Open

Open

Open

Closed

Open

Open

Open

 

4

Open

Open

Open

Open

Open

Open

Open

Closed

Open

Open

 

2

Open

Open

Open

Open

Open

Open

Open

Open

Open

Closed

I/O BASE ADDRESS

Address

SW1/1

SW1/2

SW1/3

SW1/4

»

2A0-2BF

On

Off

On

On

 

280-29F

On

On

On

On

 

2C0-2DF

On

On

Off

On

 

2E0-2FF

On

Off

Off

On

 

300-31F

On

On

On

Off

 

320-33F

On

Off

On

Off

 

340-35F

On

On

Off

Off

 

360-37F

Off

On

Off

Off

BASE MEMORY ADDRESS

Base Address

SW1/5

SW1/6

 

C0000-C3FFF

On

On

 

C4000-C7FFF

Off

On

 

C8000-CBFFF

On

Off

»

CC000- CFFFF

Off

Off

LINK INTEGRITY TEST

Setting

JP31

»

Enabled

Pins 1 & 2 Closed

 

Disabled

Pins 2 & 3 Closed

Note:Link Integrity is only used with 10Base-T wiring. When using an AUI transciever, the test should be disabled.

COMPATIBILITY

Mode

JP2

»

Compatibility on

Pins 1 & 2 Closed

 

Compatibility off

Pins 2 & 3 Closed

Note: If one of the following problems presist after checking all other possibilities turn off Compatibility:

CABLE TYPE

Type

JP8

JP9

JP10

JP11

JP12

JP13

 

AUI transceiver via DB-15 port

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Pins 2 & 3

Closed

»

Shielded/Unshielded twisted pair

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Pins 1 & 2

Open

Note: Pins designated should be in the closed position.

DIAGNOSTIC LED(S)

Status

Condition

Jabber LED (1) on (Red)

Adapter is continually sending random data

Link test LED (2) on (Red)

Network connection good

Transmit LED (3) blinks (Red)

Data is being transmitted

Receive LED (4) on (Red)

Data is being received

Note: When using the AUI port, the LEDs are not functional.

MISCELLANEOUS NOTES

The AT adapter can be used in a file server or a work station.

The AT-WS adapter can be used in a work station only.

Different drivers must be used for the National & the Fujitsu chipset cards, they are not interchangeable. Fujitsu drivers may be used for either 8 or 16 bit Fujitsu cards. While the National chipset cards require a different driver for an 8 or 16 bit card.