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

128MB

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

VGA port

J1

IDE interface 2

J22

PS/2 mouse port

J3

Floppy drive interface

J26

Serial port 1

J4

External battery

J31

Parallel port

J5

Keylock

J38

Ethernet 10BaseT connector

J6

Front panel LEDs

J39

AUI connector

J7

Speaker

J40

Ethernet 10Base2 connector

J11

Chassis fan power

J41

VGA feature connector

J17

Riser slot

SL1

Serial port 2

J20

32-bit PCI slot

PC1

IDE interface 1

J21

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Password normal operation

J8

Open

Password clear

J8

Closed

»

Monitor type select color

J9

Closed

Monitor type select monochrome

J9

Open

»

VGA IRQ9 disabled

J12

Open

VGA IRQ9 enabled

J12

Closed

»

On board I/O enabled

J13

Pins 2 & 3 closed

On board I/O disabled

J13

Pins 1 & 2 closed

»

Boot select normal boot

J14

Pins 2 & 3 closed

Boot select boot block

J14

Pins 1 & 2 closed

»

On board video enabled

J15

Pins 2 & 3 closed

On board video disabled

J15

Pins 1 & 2 closed

Parity enabled

J16

Pins 2 & 3 closed

Parity disabled

J16

Pins 1 & 2 closed

»

Factory configured - do not alter

J30

Unidentified

LDEV# bypass select ISA backplane

J35

Closed

LDEV# bypass select PCI backplane

J35

Open

SIMM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 1M x 36

None

None

None

8MB

(1) 2M x 36

None

None

None

8MB

(1) 1M x 36

(1) 1M x 36

None

None

12MB

(1) 2M x 36

(1) 1M x 36

None

None

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

None

16MB

(1) 4M x 36

None

None

None

16MB

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

None

16MB

(1) 2M x 36

(1) 2M x 36

None

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

SIMM CONFIGURATION (CON'T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

20MB

(1) 4M x 36

(1) 1M x 36

None

None

20MB

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

24MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

None

24MB

(1) 4M x 36

(1) 2M x 36

None

None

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

None

24MB

(1) 2M x 36

(1) 4M x 36

None

None

28MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

28MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 8M x 36

None

None

None

32MB

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

None

32MB

(1) 4M x 36

(1) 4M x 36

None

None

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

36MB

(1) 8M x 36

(1) 1M x 36

None

None

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

None

36MB

(1) 1M x 36

(1) 8M x 36

None

None

40MB

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

None

40MB

(1) 8M x 36

(1) 2M x 36

None

None

40MB

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

40MB

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

None

40MB

(1) 2M x 36

(1) 8M x 36

None

None

44MB

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

48MB

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

None

48MB

(1) 8M x 36

(1) 4M x 36

None

None

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

None

48MB

(1) 4M x 36

(1) 8M x 36

None

None

52MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

56MB

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

56MB

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

None

64MB

(1) 8M x 36

(1) 8M x 36

None

None

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

68MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

None

72MB

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

None

80MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

80MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

None

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

None

100MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

104MB

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

112MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

Note: The location of the banks is unidentified.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

128KB

(4) 32K x 8

None

256KB

(4) 32K x 8

(4) 32K x 8

512KB

(4) 64K x 8

(4) 64K x 8

Note: The location of the banks is unidentified.

CACHE JUMPER CONFIGURATION

Size

J24

J25

None

Open

Open

128KB

Open

Pins 1 & 2 closed

256KB

Pins 1 & 2 closed

Pins 2 & 3 closed

512KB

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

VIDEO MEMORY CONFIGURATION

Note: The location of the video memory is unidentified.

CPU SPEED SELECTION

Speed

J32

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

J33

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

J34

Standard CPU

Pins 2 & 3 closed

S-series CPU

Pins 1 & 2 closed

P24T

Pins 1 & 2 closed

CPU MULTIPLIER SELECTION

Multiplier

J37

2x

Pins 3 & 4 closed

3x

Open

Other multiplier

Pins 1 & 2 closed

CPU VOLTAGE SELECTION

Voltage

J36

3.3v

Pins 1 & 3, 2 & 4 closed

5v

Pins 3 & 5, 4 & 6 closed

DMA CHANNEL SELECTION

Channel

J27

J28

1

Pins 1 & 2 closed

Pins 1 & 2 closed

»

3

Pins 2 & 3 closed

Pins 2 & 3 closed