486AL Motherboard Settings and Configuration

Processor

CX486M6/CX486M7/AM486SXL/AM486SX(PLUS)/80486SX/AM486DXL/ 80486DX/ 80486DX2/AM486DX4(PLUS)/80486DX4/P23S/P24D/Pentium Overdrive

Processor Speed

25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/100(internal)/ 120(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

128MB

Cache

128/256/512/1024KB

BIOS

AMI/Award

Dimensions

280mm x 220mm

I/O Options

32-bit VESA local bus slot, floppy drive interface, green PC connector, IDE interface, parallel port, serial ports (2), VGA feature connector, VGA port, riser slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

CN1

Green PC connector

JP51

Parallel port

CN2

Green PC connector

JP59

Serial port 2

CN3

Turbo LED

JP61 pins 1 & 2

Serial port 1

CN4

Turbo switch

JP61 pins 3 & 4

VGA feature connector

CN5

Reset switch

JP62

IDE interface

CN6

Speaker

JP63

Floppy drive interface

CN7

Power LED & keylock

JP64

Power LED

J1

Riser Card

SL1

External battery

JP16

32-bit VESA local bus slot

SL2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

PS/2 mouse enabled

JP3

Closed

PS/2 mouse disabled

JP3

Open

»

VGA BIOS enabled

JP7

pins 1 & 2 closed

VGA BIOS disabled

JP7

pins 2 & 3 closed

»

Factory configured - do not alter

JP8

N/A

Monitor type select color

JP9

Closed

Monitor type select monochrome

JP9

Open

»

CMOS memory normal operation

JP11

pins 1 & 2 closed

CMOS memory clear

JP11

pins 2 & 3 closed

»

ECP DRQ enabled

JP12

pins 1 & 2 closed

ECP DRQ disabled

JP12

pins 2 & 3 closed

»

ECP A10 enabled

JP15

pins 1 & 2 closed

ECP A10 disabled

JP15

pins 2 & 3 closed

»

Parallel port IRQ select IRQ7

JP17

pins 2 & 3 closed

Parallel port IRQ select IRQ5

JP17

pins 1 & 2 closed

»

Serial port IRQ select IRQ4

JP18

pins 3 & 4 closed

Serial port IRQ select IRQ3

JP18

pins 1 & 2 closed

»

Factory configured - do not alter

JP24

N/A

CPU voltage regulator type select LT1085

JP25

pins 1 & 2 closed

CPU voltage regulator type select LT1085-3.3

JP25

pins 2 & 3 closed

CPU voltage regulator type select auto

JP27

Closed

CPU voltage regulator type select manual

JP27

Open

»

IDE interface enabled

JP32

Open

IDE interface disabled

JP32

Closed

»

CPU clock = CLKIN

JP47

pins 1 & 2 closed

CPU clock delayed for CLKIN

JP47

pins 2 & 3 closed

»

Internal clock select CLKIN

JP50

pins 1 & 2 closed

Internal clock select 1/2 CLKIN

JP50

pins 2 & 3 closed

DRAM CONFIGURATION 1

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

NONE

NONE

2MB

(4) 256K x 9

(1) 256K x 36

NONE

4MB

(4) 1M x 9

NONE

NONE

5MB

(4) 256K x 9

(1) 1M x 36

NONE

6MB

(4) 256K x 9

(1) 256K x 36

(1) 1M x 36

8MB

(4) 1M x 9

(1) 1M x 36

NONE

12MB

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB

(4) 4M x 9

NONE

NONE

17MB

(4) 256K x 9

(1) 4M x 36

NONE

18MB

(4) 256K x 9

(1) 256K x 36

(1) 4M x 36

20MB

(4) 1M x 9

(1) 4M x 36

NONE

24MB

(4) 1M x 9

(1) 1M x 36

(1) 4M x 36

32MB

(4) 4M x 9

(1) 4M x 36

NONE

36MB

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

64MB

(4) 16M x 9

NONE

NONE

65MB

(4) 256K x 9

(1) 16M x 36

NONE

68MB

(4) 1M x 9

(1) 16M x 36

NONE

72MB

(4) 1M x 9

(1) 1M x 36

(1) 16M x 36

80MB

(4) 4M x 9

(1) 16M x 36

NONE

96MB

(4) 4M x 9

(1) 4M x 36

(1) 16M x 36

128MB

(4) 16M x 9

(1) 16M x 36

NONE

DRAM CONFIGURATION 2

Size

Bank 0

Bank 1

Bank 2

1MB

NONE

(1) 256K x 36

NONE

2MB

NONE

(1) 256K x 36

(1) 256K x 36

4MB

NONE

(1) 1M x 36

NONE

5MB

NONE

(1) 256K x 36

(1) 1M x 36

6MB

(4) 1M x 9

(1) 256K x 36

(1) 256K x 36

8MB

NONE

(1) 1M x 36

(1) 1M x 36

12MB

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB

NONE

(1) 4M x 36

NONE

17MB

NONE

(1) 256K x 36

(1) 4M x 36

18MB

(4) 4M x 9

(1) 256K x 36

(1) 256K x 36

20MB

NONE

(1) 1M x 36

(1) 4M x 36

24MB

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

32MB

NONE

(1) 4M x 36

(1) 4M x 36

32MB

NONE

(1) 8M x 36

NONE

36MB

(4) 4M x 9

(1) 1M x 36

(1) 4M x 36

36MB

NONE

(1) 1M x 36

(1) 8M x 36

48MB

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

48MB

NONE

(1) 4M x 36

(1) 8M x 36

DRAM CONFIGURATION 2 (CON'T)

Size

Bank 0

Bank 1

Bank 2

64MB

NONE

(1) 8M x 36

(1) 8M x 36

64MB

NONE

(1) 16M x 36

NONE

65MB

NONE

(1) 256K x 36

(1) 16M x 36

68MB

NONE

(1) 1M x 36

(1) 16M x 36

72MB

(4) 16M x 9

(4) 1M x 9

(4) 1M x 9

80MB

NONE

(4) 4M x 9

(4) 16M x 9

96MB

(4) 16M x 9

(4) 4M x 9

(4) 4M x 9

128MB

NONE

(4) 16M x 9

(4) 16M x 9

DRAM JUMPER CONFIGURATION

Configuration

JP54

JP55

JP56

1

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

2

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

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

512KB (A)

(4) 64K x 8

(4) 64K x 8

(1) 32K x 8

512KB (B)

(4) 128K x 8

NONE

(1) 32K x 8

1MB

(4) 128K x 8

(4) 128K x 8

(1) 64K x 8

Note: The orientation of Banks 0 & 1 and TAG are unidentified.

CACHE JUMPER CONFIGURATION

Size

JP33

JP34

JP35

JP36

JP52

JP53

128KB

1 & 2

1 & 2

Any setting

Any setting

1 & 2

1 & 2

256KB (A)

2 & 3

2 & 3

Any setting

Any setting

1 & 2

2 & 3

256KB (B)

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

512KB (A)

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

512KB (B)

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

1MB

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP19

JP20

JP21

JP22

JP23

CX486M6

N/A

2 & 3

1 & 2

2 & 3

N/A

AM486SXL

1 & 2

N/A

2 & 3

2 & 3

N/A

AM486SX(PLUS)

4 & 5

N/A

1 & 2

2 & 3

2 & 3

80486SX

1 & 2

N/A

1 & 2

2 & 3

N/A

AM486DXL

1 & 2

N/A

2 & 3

2 & 3

N/A

CX486M7

N/A

2 & 3

1 & 2

2 & 3

N/A

80486DX

1 & 2

N/A

1 & 2

2 & 3

N/A

80486DX2

1 & 2

N/A

1 & 2

2 & 3

N/A

AM486DX4(PLUS)

4 & 5

N/A

1 & 2

2 & 3

2 & 3

80486DX4

1 & 2

N/A

1 & 2

2 & 3

N/A

P23S

1 & 2

N/A

1 & 2

2 & 3

N/A

P24D

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

P24T

1 & 2

1 & 2

1 & 2

1 & 2

N/A

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON'T)

Type

JP38

JP39

JP40

JP41

JP42

CX486M6

2 & 3

2 & 3

N/A

1 & 2

2 & 3

AM486SXL

N/A

3 & 4

1 & 2

3 & 4

2 & 3

AM486SX(PLUS)

4 & 5

N/A

N/A

2 & 3

2 & 3

80486SX

4 & 5

N/A

N/A

2 & 3

2 & 3

AM486DXL

N/A

3 & 4

1 & 2, 3 & 4

3 & 4

1 & 2, 3 & 4

CX486M7

2 & 3

2 & 3

3 & 4

1 & 2

1 & 2, 3 & 4

80486DX

4 & 5

N/A

3 & 4

2 & 3

1 & 2, 3 & 4

80486DX2

4 & 5

N/A

3 & 4

2 & 3

1 & 2, 3 & 4

AM486DX4(PLUS)

4 & 5

N/A

3 & 4

2 & 3

1 & 2, 3 & 4

80486DX4

4 & 5

N/A

3 & 4

2 & 3

1 & 2, 3 & 4

P23S

4 & 5

N/A

3 & 4

2 & 3

2 & 3

P24D

4 & 5

N/A

3 & 4

2 & 3

1 & 2, 3 & 4

P24T

1 & 2

1 & 2

2 & 3

2 & 3

1 & 2, 3 & 4

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON'T)

Type

JP43

JP44

JP45

JP46

JP48

JP49

CX486M6

N/A

N/A

2 & 3

N/A

N/A

N/A

AM486SXL

N/A

N/A

4 & 5

N/A

N/A

N/A

AM486SX(PLUS)

N/A

N/A

3 & 4

N/A

N/A

N/A

80486SX

N/A

N/A

3 & 4

N/A

2 & 3

1 & 2

AM486DXL

N/A

N/A

4 & 5

N/A

1 & 2

2 & 3

CX486M7

N/A

N/A

2 & 3

N/A

1 & 2

2 & 3

80486DX

2 & 3

N/A

3 & 4

N/A

2 & 3

1 & 2

80486DX2

2 & 3

N/A

3 & 4

N/A

2 & 3

1 & 2

AM486DX4(PLUS)

2 & 3

N/A

3 & 4

N/A

1 & 2

1 & 2

80486DX4

1 & 2

N/A

3 & 4

N/A

2 & 3

1 & 2

P23S

N/A

N/A

3 & 4

N/A

N/A

N/A

P24D

1 & 2, or 2 & 3

N/A

1 & 2, 3 & 4

N/A

1 & 2

1 & 2

P24T

N/A

N/A

3 & 4

1 & 2, or 2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position. This board also accepts SL-series CPUs & am486dxl2, but no jumper settings are listed.

CPU SPEED CONFIGURATION

Speed

JP37

25MHz

pins 1 & 2, 5 & 6 closed

33MHz

pins 1 & 2, 3 & 4 closed

40MHz

pins 5 & 6 closed

50iMHz

pins 1 & 2, 5 & 6 closed

50MHz

pins 3 & 4 closed

66iMHz

pins 1 & 2, 3 & 4 closed

75iMHz

pins 1 & 2, 5 & 6 closed

80iMHz

pins 5 & 6 closed

100iMHz

pins 1 & 2, 3 & 4 closed

120iMHz

pins 5 & 6 closed

CPU VOLTAGE CONFIGURATION

Voltage

JP26

Auto detect

Open

3.3v

pins 2 & 3 closed

5v

pins 1 & 2 closed

VL BUS WAIT STATE CONFIGURATION

Wait states

JP58

»

0 wait states

pins 1 & 2 closed

»

1 wait state

pins 2 & 3 closed

VL BUS SPEED CONFIGURATION

CPU speed

JP57

»

<= 33MHz

pins 1 & 2 closed

»

> 33MHz

pins 2 & 3 closed

DMA CONFIGURATION

DMA

JP13

JP14

»

DMA 1

pins 2 & 3 closed

pins 2 & 3 closed

»

DMA 3

pins 1 & 2 closed

pins 1 & 2 closed

FLOPPY ENHANCED MODE CONFIGURATION

Setting

JP28

JP29

»

Enabled

Closed

Closed

»

Disabled

Open

Open

KEYBOARD CONFIGURATION

Type

JP1

JP2

JP5

JP6

AT

Open

Open

pins 2 & 3 closed

pins 2 & 3 closed

PS/2

Closed

Closed

pins 1 & 2 closed

pins 1 & 2 closed

MEDIA DETECT CONFIGURATION

Setting

JP30

JP31

»

Enabled

Closed

Closed

»

Disabled

Open

Open

MISCELLANEOUS TECHNICAL NOTE

Note: The location of pin 1 is unidentified.