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Processor

AM486SX/80486SX/AM486SX2/80486SX2/SL AM486DX/CX486DX/ CX486DX2/80486DX/80486DX2/SL80486DX2/AM486DX4/80486DX4/Pentium Overdrive

Processor Speed

25/33/40(internal)/50(internal)/66(internal)/75(internal)/100(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

128MB

Cache

128/256KB

BIOS

Phoenix

Dimensions

241mm x 218mm

I/O Options

PS/2 mouse port, PS/2 mouse interface, parallel port, serial port (2), 32-bit PCI slots (4), floppy drive interface, IDE interfaces (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

IDE interface 2

J25

Turbo switch

J2

Speaker

J31

Turbo LED

J3

Floppy drive interface

J36

Power LED & keylock

J9

Serial port 1

J37

PS/2 mouse interface

J10

Serial port 2

J38

IDE interface 1

J20

Parallel port

J39

IDE interface LED

J21

32-bit PCI slots

PC1 - PC4

Reset switch

J23

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

�

Factory configured - do not alter

J22

N/A

�

Factory configured - do not alter

W19

pins 2 & 3 closed

�

PCI clock speed select CPU clock speed

W20

pins 1 & 2 closed

PCI clock speed select � CPU clock speed

W20

pins 2 & 3 closed

�

PS/2 mouse type select PS/2 version

W33

Closed

PS/2 mouse type select AT version

W33

Open

�

Factory configured - do not alter

W38

pins 2 & 3 closed

DRAM 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) 1M x 36

(1) 1M x 36

(1) 1M x 36

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 4M x 36

NONE

NONE

NONE

16MB

(1) 2M 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) 2M x 36

(1) 1M x 36

(1) 1M x 36

32MB

(1) 8M x 36

NONE

NONE

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

40MB

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

48MB

(1) 4M 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

72MB

(1) 8M x 36

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

80MB

(1) 8M x 36

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

NONE

96MB

(1) 8M x 36

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB (A)

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

256KB (B)

(4) 64K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

W23

W34

W35

W36

None

Open

Open

Open

Open

128KB

Open

1 & 2

1 & 2, 4 & 5

1 & 2

256KB (A)

Closed

2 & 3

2 & 3, 4 & 5

2 & 3

256KB (B)

Closed

1 & 2

1 & 2, 3 & 4

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

W8

AM486SX

12 & 13, 15 & 16, 37 & 38, 42 & 43

80486SX

3 & 4, 12 & 13, 15 & 16, 19 & 20, 21 & 22, 26 & 27, 37 & 38, 42 & 43

AM486SX2

12 & 13, 15 & 16, 37 & 38, 42 & 43

80486SX2

3 & 4, 12 & 13, 15 & 16, 19 & 20, 21 & 22, 26 & 27, 37 & 38, 42 & 43

SL AM486DX

26 & 27, 29 & 30, 33 & 34, 36 & 37, 40 & 41, 42 & 43

CX486DX

24 & 25, 37 & 38, 40 & 41

80486DX

37 & 38, 40 & 41, 42 & 43

CX486DX2

24 & 25, 37 & 38, 40 & 41

80486DX2 (WB)

26 & 27, 29 & 30, 33 & 34, 36 & 37, 40 & 41, 42 & 43

80486DX2

37 & 38, 40 & 41, 42 & 43

AM486DX4

37 & 38, 40 & 41, 42 & 43

80486DX4

37 & 38, 40 & 41, 42 & 43

P24T

23 & 24, 36 & 37, 39 & 40, 42 & 43

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

W15

W16

25MHz

Open

Open

33MHz

Closed

Closed

40MHz

Open

Closed

50iMHz

Open

Open

66iMHz

Closed

Closed

75iMHz

Open

Open

100iMHz

Closed

Closed

CPU VOLTAGE CONFIGURATION

Size

J4

3.3v

Open

4v

Open

5v

pins 3 & 5, 4 & 6, 7 & 9, 8 & 10 closed