TEK-AT4L PLUS Motherboard Settings and Configuration

Device Type

Single board computer

Processor

80486DX4/AM 5X86

Processor Speed

25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz

Chip Set

VLSI 82C486

Maximum Onboard Memory

128MB (EDO & SDRAM supported)

Cache

128/256/512/1024/2048KB

BIOS

Unidentified

Dimensions

341mm x 119mm

I/O Options ()

Floppy drive interface, IDE interface, parallel port, PS/2 mouse interface, serial ports (2)

CONNECTIONS

Purpose

Location

Purpose

Location

IDE interface

J1

Power connector

J5

Floppy drive interface

J2

Serial port 1

J6

Front panel connector

J3

Parallel port

J7

PS/2 mouse interface

J3A

Chassis fan power

J10

Serial port 2

J4

USER CONFIGURABLE SETTINGS

Function

Label

Position

Boot from flash

SW1/pins 1 & 2

Closed

Boot from drive

SW1/pins 1 & 2

Open

Serial port select for VT100 download COM2

SW1/pins 3 & 4

Closed

Serial port select for VT100 download COM1

SW1/pins 3 & 4

Open

Display mode select VT100

SW1/pins 5 & 6

Closed

Display mode select standard

SW1/pins 5 & 6

Open

Download mode select remote

SW1/pins 7 & 8

Closed

Download mode select normal

SW1/pins 7 & 8

Open

»

Factory configured - do not alter

SW2

Unidentified

»

Power fail detection

W7

Pins 1 & 2 closed

Low battery detection

W7

Pins 2 & 3 closed

»

Vbatt disabled

W10

Open

Vbatt enabled

W10

Closed

»

IOCHRDY signal to IDE interface disabled

W11

Open

IOCHRDY signal to IDE interface enabled

W11

Closed

»

Watchdog timer enabled

W12

Closed

Watchdog timer disabled

W12

Open

»

Power monitoring disabled

W13

Open

Power monitoring enabled

W13

Closed

»

Flash BIOS write enabled

W14

Closed

Flash BIOS write disabled

W14

Open

»

BIOS write select EPROM

W15

Open

BIOS write select flash

W15

Closed

»

Teknor BIOS extension enabled

W16

Open

Teknor BIOS extension disabled

W16

Closed

»

PS/2 mouse enabled

W19A

Closed

PS/2 mouse disabled

W19A

Open

»

Monitor type select color

W22

Open

Monitor type select monochrome

W22

Closed

Parallel port IRQ select IRQ5

W25

Pins 1 & 2 closed

Parallel port IRQ select IRQ7

W25

Pins 2 & 3 closed

SIMM CONFIGURATION

Size

Bank 0

1MB

(4) 256K x 9

4MB

(4) 1M x 9

16MB

(4) 4M x 9

32MB

(4) 8M x 9

SIMM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(1) 256K x 36

None

2MB

(1) 512K x 36

None

2MB

(1) 256K x 36

(1) 256K x 36

3MB

(1) 512K x 36

(1) 256K x 36

4MB

(1) 1M x 36

None

4MB

(1) 512K x 36

(1) 512K x 36

5MB

(1) 1M x 36

(1) 256K x 36

6MB

(1) 1M x 36

(1) 512K x 36

8MB

(1) 2M x 36

None

8MB

(1) 1M x 36

(1) 1M x 36

9MB

(1) 2M x 36

(1) 256K x 36

10MB

(1) 2M x 36

(1) 512K x 36

12MB

(1) 2M x 36

(1) 1M x 36

16MB

(1) 4M x 36

None

16MB

(1) 2M x 36

(1) 2M x 36

17MB

(1) 4M x 36

(1) 256K x 36

18MB

(1) 4M x 36

(1) 512K x 36

20MB

(1) 4M x 36

(1) 1M x 36

24MB

(1) 4M x 36

(1) 2M x 36

32MB

(1) 8M x 36

None

32MB

(1) 4M x 36

(1) 4M x 36

CACHE CONFIGURATION

Note: The location of the cache is unidentified.

CPU SPEED SELECTION

Speed

W21

25MHz

Pins 1 & 2, 3 & 4, 5 & 6 closed

33MHz

Pins 3 & 4, 5 & 6 closed

50iMHz

Pins 1 & 2, 3 & 4, 5 & 6 closed

66iMHz

Pins 3 & 4, 5 & 6 closed

75iMHz

Pins 1 & 2, 3 & 4, 5 & 6 closed

100iMHz

Pins 3 & 4, 5 & 6 closed

CPU TYPE SELECTION

Type

W17

W18

W19

W26

80486SX

Open

Pins 1 & 2 closed

Open

Open

80486SX2

Open

Pins 1 & 2 closed

Open

Open

80486DX

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

AM486DX2

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Closed

80486DX2

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

80486DX2 (WB)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

ODP486

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Open

80486DX4

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

AM486DX4

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

80486DX4 (WB)

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

AM 5X86

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

Closed

CPU VOLTAGE SELECTION

Voltage

W27

3.3v

Open

5v

Closed

BUSCLK SIGNAL SELECTION

Speed

W20

16MHz

Pins 2 & 3 closed

25MHz

Pins 1 & 2 closed

33MHz

Open

DMA CHANNEL SELECTION

Channel

W23

W24

1

Pins 1 & 2 closed

Pins 1 & 2 closed

3

Pins 2 & 3 closed

Pins 2 & 3 closed

SERIAL PORT 2 SELECTION

Setting

W1

W2

W3

W4

W5

W6

RS-232

1 & 2

1 & 2

Open

Open

1 & 2

1 & 2

RS-485

2 & 3

2 & 3

Closed

Closed

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

EDOUT SELECTION

Setting

W8

EDOUT left to software

Open

EDOUT to pin 29 & ground to pin 17

Pins 1 & 3, 2 & 4 closed

EDOUT to pin 17 & ground to pin 29

Pins 1 & 2, 3 & 4 closed

Note: The above listed pins are located on J2.

HDOUT SELECTION

Setting

W9

HDOUT left to software

Open

HDOUT to pin 33 & ground to pin 27

Pins 1 & 3, 2 & 4 closed

HDOUT to pin 27 & ground to pin 33

Pins 1 & 2, 3 & 4 closed

Note: The above listed pins are located on J2.