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TEK-AT4

TEKNOR INDUSTRIAL COMPUTERS, INC.

TEK-AT4

Device Type

Single board computer

Processor

80486SX/80486DX/80486DX2/80486DX4

Processor Speed

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

Chip Set

VLSI 82C486

Maximum Onboard Memory

16MB

Cache

Unidentified

BIOS

Unidentified

Dimensions

178mm x 119mm

I/O Options

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

CONNECTIONS

Purpose

Location

Purpose

Location

IDE interface

J1

Serial port 2

J4

Floppy drive interface

J2

Power connector

J5

Chassis fan power

J2A

Serial port 1

J6

Multifunction connector

J3

Parallel port

J7

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

SW1

Unidentified

Boot from flash

SW2/pins 1 & 2

Closed

 

Boot from drive

SW2/pins 1 & 2

Open

Serial port select for VT100 download COM2

SW2/pins 3 & 4

Closed

 

Serial port select for VT100 download COM1

SW2/pins 3 & 4

Open

Display mode select VT100

SW2/pins 5 & 6

Closed

 

Display mode select standard

SW2/pins 5 & 6

Open

Download mode select remote

SW2/pins 7 & 8

Closed

 

Download mode select normal

SW2/pins 7 & 8

Open

Power detection select power failure

W1

Pins 1 & 2 closed

 

Power detection select low battery

W1

Pins 2 & 3 closed

SRAM battery backup select no battery

W2

Open

 

SRAM battery backup select vbatt

W2

Closed

IDE interface enabled

W3

Open

 

IDE interface disabled

W3

Closed

Watchdog timer enabled

W4

Closed

 

Watchdog timer disabled

W4

Open

Power monitoring disabled

W5

Open

 

Power monitoring enabled

W5

Closed

Flash BIOS installed

W6

Closed

 

Flash BIOS not installed

W6

Open

BIOS type select EPROM

W7

Open

 

BIOS type select flash

W7

Closed

Teknor BIOS extension enabled

W8

Open

 

Teknor BIOS extension disabled

W8

Closed

Monitor type select monochrome/EGA/VGA

W19

Open

 

Monitor type select CGA

W19

Closed

SIMM CONFIGURATION

Size

Bank 0

1MB

(4) 256K x 9

2MB

(4) 512K x 9

4MB

(4) 1M x 9

16MB

(4) 4M x 9

CACHE CONFIGURATION

Note: The location of the cache is unidentified.

CACHE JUMPER CONFIGURATION

Size

W20

32K x 8, 128K x 8

Pins 1 & 2 closed

256K x 8, 512K x 8

Pins 2 & 3 closed

CPU SPEED SELECTION

Speed

W18/pins 1 & 2

W18/pins 3 & 4

W18/pins 5 & 6

25MHz

Open

Closed

Closed

33MHz

Closed

Closed

Closed

50iMHz

Open

Closed

Closed

50MHz

Closed

Closed

Closed

66iMHz

Closed

Closed

Closed

75iMHz

Open

Closed

Closed

100iMHz

Closed

Closed

Closed

CPU TYPE SELECTION

Type

W15

W16

W17

80486SX

Pins 1 & 2 closed

Open

Open

80486DX

Pins 2 & 3 closed

Pins 1 & 2 closed

Closed

80486DX2

Pins 2 & 3 closed

Pins 1 & 2 closed

Closed

80486DX4

Pins 2 & 3 closed

Pins 1 & 2 closed

Closed

BUSCLK SIGNAL SELECTION

Speed

W14A

16MHz

Pins 2 & 3 closed

25MHz

Pins 1 & 2 closed

33MHz

Open

Note: The location of the above jumper is unidentified.

SERIAL PORT 2 SELECTION

Setting

W9

W10

W11

W12

W13

W14

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.