Device Type

Mainboard

Processor

80486SX/80486SX2/80486DX/80486DX2/80486DX4

Processor Speed

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

Chip Set

Unidentified

Video Chip Set

Unidentified

Maximum Onboard Memory

64MB

Maximum Video Memory

Unidentified

Cache

128/256/512KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

32-bit PCI slot, Ethernet 10Base2 connector, Ethernet 10BaseT connector, AUI connector, floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

J2

IDE interface 2

J24

VGA port

J3

External battery

J30

Parallel port

J5

Front panel LEDs

J34

Serial port

J6

Keylock

J35

VGA feature connector

J14

Speaker

J36

Floppy drive interface

J21

Chassis fan power

J38

Serial port 2

J22

32-bit PCI slot

PC1

IDE interface 1

J23

Riser slot

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Monitor type select color

J8

Closed

Monitor type select monochrome

J8

Open

»

VGA IRQ9 disabled

J9

Open

VGA IRQ9 enabled

J9

Closed

»

Password normal operation

J10

Open

Password clear

J10

Closed

»

Factory configured - do not alter

J11

Unidentified

»

Boot select normal boot

J17

Pins 2 & 3 closed

Boot select boot block

J17

Pins 1 & 2 closed

»

Parity enabled

J18

Pins 2 & 3 closed

Parity disabled

J18

Pins 1 & 2 closed

»

On board video enabled

J19

Pins 2 & 3 closed

On board video disabled

J19

Pins 1 & 2 closed

»

On board I/O enabled

J20

Pins 2 & 3 closed

On board I/O disabled

J20

Pins 1 & 2 closed

LDEV# bypass select ISA backplane

J33

Closed

LDEV# bypass select PCI backplane

J33

Open

»

On board memory enabled

J37

Open

On board memory disabled

J37

Closed

SIMM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(1) 1M x 36

None

8MB

(1) 2M x 36

None

8MB

(1) 1M x 36

(1) 1M 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

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

36MB

(1) 8M x 36

(1) 1M x 36

40MB

(1) 8M x 36

(1) 2M x 36

48MB

(1) 8M x 36

(1) 4M x 36

64MB

(1) 8M x 36

(1) 8M x 36

Note: The location of the banks is unidentified.

CACHE CONFIGURATION

Note: The location of the cache is unidentified.

CACHE JUMPER CONFIGURATION

Size

J27

None

Open

128KB

Open

512KB

Pins 1 & 2, 3 & 4 closed

VIDEO MEMORY CONFIGURATION

Note: The location of the video memory is unidentified.

CPU SPEED SELECTION

Speed

J25

25MHz

Pins 1 & 2 closed

33MHz

Pins 2 & 3 closed

50iMHz

Pins 1 & 2 closed

66iMHz

Pins 2 & 3 closed

75iMHz

Pins 1 & 2 closed

100iMHz

Pins 2 & 3 closed

CPU TYPE SELECTION

Type

J31

80486SX

Pins 5 & 6 closed

80486SX2

Pins 1 & 2, 3 & 4 closed

80486DX

Pins 1 & 2, 3 & 4 closed

80486DX2

Pins 1 & 2, 3 & 4 closed

80486DX4

Pins 1 & 2, 3 & 4 closed

CPU TYPE SELECTION

Type

J28

Standard CPU

Pins 2 & 3 closed

S-series CPU

Pins 1 & 2 closed

P24T

Pins 1 & 2 closed

CPU MULTIPLIER SELECTION

Multiplier

J29

2x

Pins 3 & 4 closed

3x

Open

Other multiplier

Pins 1 & 2 closed

CPU VOLTAGE SELECTION

Voltage

J32

3.3v

Pins 1 & 3, 2 & 4 closed

5v

Pins 3 & 5, 4 & 6 closed

DMA CHANNEL SELECTION

Channel

J15

J16

1

Pins 1 & 2 closed

Pins 1 & 2 closed

»

3

Pins 2 & 3 closed

Pins 2 & 3 closed