Processor

80486SX/SL80486SX/U5S/CX486DX/AM486DX/80486DX/SL80486DX/ AM486DX2/AM486DX2V8T/CX486DX2/CX486DX2V/SL80486DX2/AM486DX4/ 80486DX4/Pentium Overdrive

Processor Speed

25/33/40/50(internal)/66(internal)/75(internal)/80(internal)/100(internal)MHz

Chip Set

Unidentified

Max. Onboard DRAM

128MB

Cache

128/256/512KB

BIOS

Award

Dimensions

254mm x 218mm

I/O Options

32-bit PCI slots (2), floppy drive interface, game port, green PC connector, IDE interfaces (2), parallel port, serial ports (2), VGA feature connector, VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

IDE interface (primary)

CN1

Green PC connector

JP39

IDE interface (secondary)

CN2

Power LED & keylock

JW1

Floppy drive interface

CN3

Speaker

JW2

Parallel port

CN4

Turbo LED

JW3

Serial port 1

J3

Turbo switch

JW4

Serial port 2

J4

Reset switch

JW5

Game interface

J5

IDE interface LED

JW6

External battery

J6

IDE interface LED

JW7

VGA interface

J9

32-bit PCI slots

PC1 & PC2

VGA feature connector

J10

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

J12

N/A

»

Factory configured - do not alter

JP5

N/A

»

Factory configured - do not alter

JP6

N/A

»

Factory configured - do not alter

JP36

N/A

»

Factory configured - do not alter

JP42

pins 2 & 3 closed

»

Factory configured - do not alter

JP43

pins 1 & 2 closed

»

On board VGA enabled

JP69

pins 2 & 3 closed

On board VGA disabled

JP69

pins 1 & 2 closed

»

Factory configured - do not alter

JP70

Open

»

Factory configured - do not alter

JP84

Open

»

Factory configured - do not alter

RN18

N/A

»

Factory configured - do not alter

RN19

N/A

»

Factory configured - do not alter

RN20

N/A

»

Factory configured - do not alter

RN21

N/A

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(1) 256K x 36

NONE

NONE

2MB

(1) 256K x 36

(1) 256K x 36

NONE

2MB

(1) 512K x 36

NONE

NONE

4MB

(1) 256K x 36

(1) 256K x 36

(1) 512K x 36

4MB

(1) 512K x 36

(1) 512K x 36

NONE

4MB

(1) 1M x 36

NONE

NONE

5MB

(1) 256K x 36

(1) 1M x 36

NONE

6MB

(1) 256K x 36

(1) 256K x 36

(1) 1M x 36

6MB

(1) 512K x 36

(1) 1M x 36

NONE

8MB

(1) 512K x 36

(1) 512K x 36

(1) 1M x 36

8MB

(1) 1M x 36

(1) 1M x 36

NONE

8MB

(1) 2M x 36

NONE

NONE

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 2M x 36

(1) 2M x 36

NONE

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

16MB

(1) 4M x 36

NONE

NONE

17MB

(1) 256K x 36

(1) 4M x 36

NONE

18MB

(1) 256K x 36

(1) 256K x 36

(1) 4M x 36

20MB

(1) 512K x 36

(1) 512K x 36

(1) 4M x 36

20MB

(1) 1M x 36

(1) 4M x 36

NONE

24MB

(1) 1M x 36

(1) 1M x 36

(1) 4M x 36

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

32MB

(1) 8M x 36

NONE

NONE

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

36MB

(1) 1M x 36

(1) 8M x 36

NONE

40MB

(1) 1M x 36

(1) 1M x 36

(1) 8M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

48MB

(1) 4M x 36

(1) 8M x 36

NONE

64MB

(1) 16M x 36

NONE

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 8M x 36

64MB

(1) 8M x 36

(1) 8M x 36

NONE

65MB

(1) 256K x 36

(1) 16M x 36

NONE

68MB

(1) 1M x 36

(1) 16M x 36

NONE

68MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

72MB

(1) 1M x 36

(1) 1M x 36

(1) 16M x 36

80MB

(1) 4M x 36

(1) 16M x 36

NONE

80MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

96MB

(1) 4M x 36

(1) 4M x 36

(1) 16M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

128MB

(1) 16M x 36

(1) 16M x 36

NONE

CACHE CONFIGURATION

Size

Bank 0

TAG

128KB

(4) 32K x 8

(1) 32K x 8

256KB

(4) 64K x 8

(1) 32K x 8

512KB

(4) 128K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP20

128KB

pins 1 & 2, 4 & 5 closed

256KB

pins 2 & 3, 4 & 5 closed

512KB

pins 2 & 3, 5 & 6 closed

CPU TYPE CONFIGURATION

Type

JP7

JP10

JP11

JP37

80486SX

Open

Open

1 & 3, 2 & 4

1 & 2

SL80486SX

Open

Open

1 & 3, 2 & 4

Open

U5S

Open

Open

1 & 3, 2 & 4

1 & 2

CX486DX

Open

Open

1 & 3, 2 & 4

Open

AM486DX

Open

Open

1 & 3, 2 & 4

1 & 2

80486DX

Open

Open

1 & 3, 2 & 4

1 & 2

SL80486DX

Open

Open

1 & 3, 2 & 4

Open

AM486DX2

Open

Open

1 & 3, 2 & 4

1 & 2

AM486DX2V8T

Closed

Open

3 & 4, 5 & 6

1 & 2

CX486DX2

Open

Open

1 & 3, 2 & 4

Open

CX486DX2V

Open

Open

3 & 4, 5 & 6

Open

SL80486DX2

Open

Open

1 & 3, 2 & 4

Open

AM486DX4

Open

Open

3 & 5, 4 & 6

1 & 2

80486DX4

Open

Open

3 & 5, 4 & 6

Open

Pentium Overdrive

Open

Open

1 & 3, 2 & 4

Open

Note: Pins designated should be in the closed position. The CX486DX2V, AM486DX4V8T & 80486DX4 are only available on the PV4T mainboard.

CPU TYPE CONFIGURATION (CON’T)

Type

RN1

RN2

RN3

RN4

80486SX

Not installed

Not installed

Not installed

pins 9 - 16 closed

SL80486SX

Not installed

Not installed

Not installed

pins 9 - 16 closed

U5S

Not installed

Not installed

Not installed

pins 9 - 16 closed

CX486DX

Not installed

pins 1 - 8 closed

Not installed

pins 1 - 8 closed

AM486DX

Not installed

Not installed

Not installed

pins 5 - 12 closed

80486DX

Not installed

Not installed

Not installed

pins 5 - 12 closed

SL80486DX

Not installed

Not installed

Not installed

pins 5 - 12 closed

AM486DX2

Not installed

Not installed

Not installed

pins 5 - 12 closed

AM486DX2V8T

Not installed

Not installed

Not installed

pins 5 - 12 closed

CX486DX2

Not installed

pins 1 - 8 closed

Not installed

pins 1 - 8 closed

CX486DX2V

Not installed

pins 1 - 8 closed

Not installed

pins 1 - 8 closed

SL80486DX2

Not installed

Not installed

Not installed

pins 5 - 12 closed

AM486DX4

Not installed

Not installed

Not installed

pins 5 - 12 closed

80486DX4

Not installed

Not installed

Not installed

pins 5 - 12 closed

Pentium Overdrive

Not installed

Not installed

Not installed

Not installed

Note: The CX486DX2V, AM486DX4V8T & 80486DX4 are only available on the PV4T mainboard.

CPU TYPE CONFIGURATION (CON’T)

Type

RN5

RN6

RN7

80486SX

Not installed

Not installed

pins 1 - 8 closed

SL80486SX

Not installed

Not installed

pins 1 - 8 closed

U5S

Not installed

Not installed

pins 1 - 8 closed

CX486DX

Not installed

pins 1 - 8 closed

Not installed

AM486DX

Not installed

pins 1 - 8 closed

pins 1 - 8 closed

80486DX

Not installed

pins 1 - 8 closed

pins 1 - 8 closed

SL80486DX

Not installed

pins 1 - 8 closed

pins 1 - 8 closed

AM486DX2

Not installed

pins 1 - 8 closed

pins 1 - 8 closed

AM486DX2V8T

Not installed

pins 1 - 8 closed

pins 1 - 8 closed

CX486DX2

Not installed

pins 1 - 8 closed

Not installed

CX486DX2V

Not installed

pins 1 - 8 closed

Not installed

SL80486DX2

Not installed

pins 1 - 8 closed

pins 1 - 8 closed

AM486DX4

Not installed

pins 1 - 8 closed

pins 1 - 8 closed

80486DX4

Not installed

pins 1 - 8 closed

pins 1 - 8 closed

Pentium Overdrive

pins 7 & 16 closed

pins 2 & 3 closed

pins 1 & 2 closed

Note: The CX486DX2V, AM486DX4V8T & 80486DX4 are only available on the PV4T mainboard.

CPU SPEED CONFIGURATION

Speed

JP32

JP33

JP34

JP35

25MHz

pins 1 & 2 closed

Open

Open

Closed

33MHz

pins 1 & 2 closed

Closed

Closed

Closed

40MHz

pins 1 & 2 closed

Open

Closed

Closed

50iMHz

pins 1 & 2 closed

Open

Open

Closed

66iMHz

pins 1 & 2 closed

Closed

Closed

Closed

75iMHz

pins 1 & 2 closed

Open

Open

Closed

80iMHz

pins 1 & 2 closed

Open

Closed

Closed

100iMHz

pins 1 & 2 closed

Closed

Closed

Closed

CPU VOLTAGE CONFIGURATION

Voltage

JP1

JP2

JP3

JP4

3.3v

Closed

Open

Open

Open

3.45v

Open

Closed

Open

Open

3.6v

Open

Open

Closed

Open

4.04v

Open

Open

Open

Closed

CMOS CONFIGURATION

Setting

JP60

JP80

CMOS memory normal operation

pins 1 & 2 closed

pins 1 & 2 closed

CMOS memory clear

pins 2 & 3 closed

pins 2 & 3 closed