...because we can't all be on the bleeding edge...





SIS 486-471 VL BUS 5/3.3V

UNIDENTIFIED

SIS 486-471 VL BUS 5/3.3V

Processor

CX486S/80486SX/CX486DX/80486DX/80486DX2/80486DX4/Pentium Overdrive

Processor Speed

20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

128MB

Cache

64/128/256/512KB

BIOS

AMI

Dimensions

254mm x 220mm

I/O Options

32-bit VESA local bus slots (3), green PC connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Reset switch

J6

Green PC connector

J2

Power LED & keylock

J7

Turbo switch

J3

Break switch connector

JP26

Turbo LED

J4

32-bit VESA local bus slots

SL1 - SL3

Speaker

J5

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Turbo switch enabled

J3

pins 1 & 2 closed

 

Turbo switch disabled

J3

pins 2 & 3 closed

 

Use for break switch

J3

pins 4 & 5 closed

»

CMOS memory normal operation

JP16

pins 1 & 2 closed

 

CMOS memory clear

JP16

pins 2 & 3 closed

»

Monitor type select VGA/EGA/monochrome

JP17

Open

 

Monitor type select CGA

JP17

Closed

»

CX486S2 CPU not installed

JP18

Open

 

CX486S2 CPU installed

JP18

Closed

»

RC pin for break switch

JP19

pins 1 & 2 closed

 

RC pin for RC

JP19

pins 2 & 3 closed

»

Factory configured - do not alter

JP20

pins 2 & 3 closed

»

Factory configured - do not alter

JP23

pins 1 & 2 closed

»

J3 set with pins open

JP27

Closed

 

J3 set with pins 4 & 5 closed

JP27

Open

»

Factory configured - do not alter

JP43

pins 1 & 2 closed

DRAM CONFIGURATION (TABLE 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

34MB

(4) 256K x 9

(1) 256K x 36

(1) 8M x 36

36MB

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

(1) 8M x 36

NONE

48MB

(4) 4M x 9

(1) 8M x 36

NONE

52MB

(4) 1M x 9

(1) 4M x 36

(1) 8M x 36

64MB

(4) 4M x 9

(1) 4M x 36

(1) 8M x 36

64MB

(4) 16M x 9

NONE

NONE

68MB

(4) 1M x 9

(1) 8M x 36

(1) 8M x 36

80MB

(4) 4M x 9

(1) 8M x 36

(1) 8M x 36

96MB

(4) 16M x 9

(1) 8M x 36

NONE

128MB

(4) 16M x 9

(1) 8M x 36

(1) 8M x 36

DRAM CONFIGURATION (TABLE 2)

Size

Bank 0

Bank 1

Bank 2

1MB

(1) 256K x 36

NONE

NONE

2MB

(1) 256K x 36

(1) 256K 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

(4) 1M x 9

8MB

(1) 2M x 36

NONE

NONE

12MB

(1) 1M x 36

(1) 1M x 36

(4) 1M x 9

16MB

(1) 2M x 36

(1) 2M x 36

NONE

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

(4) 4M x 9

20MB

(1) 1M x 36

(1) 4M x 36

NONE

24MB

(1) 1M x 36

(1) 1M x 36

(4) 4M x 9

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

(4) 4M x 9

36MB

(1) 1M x 36

(1) 8M x 36

NONE

48MB

(1) 4M x 36

(1) 4M x 36

(4) 4M x 9

48MB

(1) 4M x 36

(1) 8M x 36

NONE

64MB

(1) 8M x 36

(1) 8M x 36

NONE

72MB

(1) 1M x 36

(1) 1M x 36

(4) 16M x 9

96MB

(1) 4M x 36

(1) 4M x 36

(4) 16M x 9

128MB

(1) 8M x 36

(1) 8M x 36

(4) 16M x 9

DRAM JUMPER CONFIGURATION

Configuration

JP36

JP37

Table 1

pins 1 & 2 closed

pins 2 & 3 closed

Table 2

pins 2 & 3 closed

pins 1 & 2 closed

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 4K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 16K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP1

JP2

JP3

JP4

JP33

JP34

JP35

64KB

2 & 3

1 & 2

2 & 3, 4 & 5

1 & 2

1 & 2

1 & 2

Open

128KB

1 & 2

1 & 2

1 & 2, 3 & 4

1 & 2

2 & 3

2 & 3

Open

256KB

2 & 3

Open

2 & 3, 4 & 5

Open

2 & 3

2 & 3

Closed

256KB

2 & 3

2 & 3

2 & 3, 4 & 5

1 & 2

2 & 3

2 & 3

Open

512KB

1 & 2

2 & 3

1 & 2, 3 & 4

2 & 3

2 & 3

2 & 3

Open

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP30

JP31

P24D

Closed

Closed

All other CPU

Open

Open

CPU TYPE CONFIGURATION

Type

JP8

JP9

JP10

JP11

JP12

CX486SX

2 & 3

Closed

2 & 3

Open

2 & 3, 4 & 5

80486SX

2 & 3

Open

2 & 3

Open

Open

SLE486SX

2 & 3

Open

2 & 3

Open

3 & 4

CX486DX

1 & 2

Closed

2 & 3

3 & 4

2 & 3

SLE486DX

1 & 2

Closed

2 & 3

3 & 4

3 & 4

80486DX

1 & 2

Closed

2 & 3

3 & 4

Open

SLE486DX2

1 & 2

Closed

2 & 3

3 & 4

3 & 4

80486DX4

1 & 2

Closed

2 & 3

3 & 4

3 & 4

P24D

1 & 2

Closed

1 & 2

3 & 4

1 & 2, 3 & 4

P24T

1 & 2

Closed

1 & 2

2 & 3

3 & 4

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP13

JP14

JP15

JP21

JP22

CX486SX

Open

1 & 2, 3 & 4

2 & 3

1 & 2

2 & 3

80486SX

Open

Open

Open

2 & 3

1 & 2

SLE486SX

1 & 2

2 & 3

4 & 5

2 & 3

1 & 2

CX486DX

Open

1 & 2, 3 & 4

2 & 3

1 & 2

2 & 3

SLE486DX

1 & 2

2 & 3

4 & 5

2 & 3

1 & 2

80486DX

Open

Open

Open

2 & 3

1 & 2

SLE486DX2

1 & 2

2 & 3

4 & 5

2 & 3

1 & 2

80486DX4

1 & 2

2 & 3

4 & 5

2 & 3

1 & 2

P24D

2 & 3

2 & 3

4 & 5

2 & 3

1 & 2

P24T

Open

2 & 3

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP24

JP25

JP32

JP41

JP42

CX486SX

2 & 3

2 & 3

2 & 3

2 & 3, 5 & 6

Closed

80486SX

Open

Open

1 & 2

2 & 3, 5 & 6

Closed

SLE486SX

Open

Open

2 & 3

2 & 3, 5 & 6

Closed

CX486DX

2 & 3

2 & 3

2 & 3

2 & 3, 5 & 6

Closed

SLE486DX

Open

Open

2 & 3

2 & 3, 5 & 6

Closed

80486DX

Open

Open

1 & 2

2 & 3, 5 & 6

Closed

SLE486DX2

Open

Open

2 & 3

2 & 3, 5 & 6

Closed

80486DX4

Open

Open

2 & 3

1 & 2, 4 & 5

Open

P24D

Open

1 & 2

2 & 3

2 & 3, 5 & 6

Closed

P24T

1 & 2

1 & 2

2 & 3

2 & 3, 5 & 6

Closed

Note: Pins designated should be in the closed position.

CPU VOLTAGE CONFIGURATION

Voltage

JP41

3.3v

pins 1 & 2, 4 & 5 closed

5.0v (DX4)

pins 2 & 3, 5 & 6 closed

Note: If Q4, Q5, and Q6 are installed or Q6 only installed, set JP41 with pins 1 & 2, 4 & 5 closed.

CPU SPEED CONFIGURATION (U16-AVASEM/AV9107-03/KTS0147C)

Speed

JP5

JP6

JP7

20MHz

Closed

Open

Closed

25MHz

Closed

Closed

Open

33MHz

Open

Closed

Closed

40MHz

Closed

Open

Open

50iMHz

Closed

Closed

Open

50MHz

Open

Open

Closed

66iMHz

Open

Closed

Closed

CPU SPEED CONFIGURATION (U17-MX8315)

Speed

JP5

JP6

JP7

20MHz

Open

Open

Open

25MHz

Open

Closed

Open

33MHz

Closed

Closed

Closed

40MHz

Open

Closed

Closed

50iMHz

Open

Closed

Open

50MHz

Closed

Open

Open

66iMHz

Closed

Closed

Closed

VESA WAIT STATE CONFIGURATION

Wait states

JP28

0 wait states

pins 1 & 2 closed

1 wait state

pins 2 & 3 closed

BUS SPEED CONFIGURATION

CPU speed

JP29

<= 33MHz

pins 1 & 2 closed

> 33MHz

pins 2 & 3 closed