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SA-486 VL-BUS M.B. REV. V2C

UNIDENTIFIED

SA-486 VL-BUS M.B. REV. V2C

Processor

CX486SX/80486SX/80487SX/AMD486DXLV/CX486DX/80486DX/80486DX2/ 80486DX4/Pentium Overdrive

Processor Speed

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

Chip Set

ALI

Max. Onboard DRAM

128MB

Cache

128/256/512/1024KB

BIOS

Phoenix

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

Power LED & keylock

CN1

Green PC connector

JG7

Speaker

CN2

Green PC connector

JG8

Reset switch

CN3

Green PC connector

JG9

Turbo switch

CN4

Green PC connector

JG10

Turbo LED

CN5

Green PC connector

JG11

External battery

CN6

32-bit VESA local bus slots

SL1 - SL3

SMI connector

JG6

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Ľ

Turbo switch enabled

CN4

Closed

 

Turbo switch disabled

CN4

Open

Ľ

Factory configured - do not alter

JC12

Open

Ľ

Factory configured - do not alter

JC15

Open

Ľ

Factory configured - do not alter

JG16

Open

Ľ

Factory configured - do not alter

X2

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

NONE

NONE

2MB

NONE

NONE

(1) 512K x 36

2MB

NONE

(1) 512K x 36

NONE

4MB

NONE

(1) 1M x 36

NONE

4MB

(4) 1M x 9

NONE

NONE

4MB

NONE

NONE

(1) 1M x 36

5MB

(4) 256K x 9

(1) 1M x 36

NONE

8MB

(4) 1M x 9

(1) 1M x 36

NONE

8MB

NONE

(1) 2M x 36

NONE

8MB

NONE

NONE

(1) 2M x 36

16MB

(4) 4M x 9

NONE

NONE

16MB

NONE

(1) 4M x 36

NONE

16MB

NONE

NONE

(1) 4M x 36

17MB

(4) 256K x 9

(1) 4M x 36

NONE

20MB

(4) 4M x 9

(1) 1M x 36

NONE

20MB

(4) 1M x 9

(1) 4M x 36

NONE

20MB

NONE

(1) 1M x 36

(1) 4M x 36

20MB

NONE

(1) 4M x 36

(1) 1M x 36

32MB

NONE

(1) 8M x 36

NONE

32MB

NONE

NONE

(1) 8M x 36

32MB

(4) 4M x 9

(1) 4M x 36

NONE

64MB

NONE

(1) 16M x 36

NONE

64MB

NONE

NONE

(1) 16M x 36

64MB

(4) 16M x 9

NONE

NONE

128MB

NONE

(1) 16M x 36

(1) 16M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

256KB

(4) 64K x 8

NONE

(1) 32K x 8

512KB

(4) 64K x 8

(4) 64K x 8

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 64K x 8

1MB

(4) 128K x 8

(4) 128K x 8

(1) 64K or 128K x 8

CACHE JUMPER CONFIGURATION

Size

JS1

JS2

JS3

JS4

128KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 3 closed

256KB

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 4 closed

256KB

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 3 closed

512KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 3 & 5 closed

512KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 3 closed

1MB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 4 & 6 closed

CPU TYPE CONFIGURATION

Type

JC1

JC2

JC3

JC4

JC5

JC6

JC20

CX486SX

Open

2 & 3

1 & 2

1 & 2

2 & 3

Open

Open

80486SX

Open

2 & 3

1 & 2

1 & 2

Open

Closed

Closed

80487SX

1 & 2

1 & 2, 3 & 4

1 & 2

1 & 2

Open

Closed

Open

CX486DX

2 & 3

1 & 2, 3 & 4

1 & 2

1 & 2

2 & 3

Closed

Open

AMD486DX

2 & 3

1 & 2, 3 & 4

1 & 2

1 & 2

Open

Closed

Open

80486DX/DX2

2 & 3

1 & 2, 3 & 4

1 & 2

1 & 2

Open

Closed

Closed

80486DX4

2 & 3

1 & 2, 3 & 4

1 & 2

1 & 2

Open

Closed

Closed

P4S/P24S

2 & 3

1 & 2, 3 & 4

1 & 2

1 & 2

Open

Closed

Closed

P23S

Open

2 & 3

1 & 2

1 & 2

Open

Closed

Open

P24T

1 & 2

1 & 2, 3 & 4

2 & 3

2 & 3

1 & 2

Closed

Closed

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CONíT)

Type

JC22

JG2

JG3

JG4

JG5

JG19

JG20

CX486SX

Closed

1 & 2

1 & 2

1 & 2

1 & 2

Closed

1 & 2

80486SX

Open

1 & 2

1 & 2

1 & 2

1 & 2

Open

Open

80487SX

Open

1 & 2

1 & 2

1 & 2

1 & 2

Open

2 & 3

CX486DX

Closed

1 & 2

1 & 2

1 & 2

1 & 2

Closed

1 & 2

AMD486DX

Open

2 & 3

2 & 3

2 & 3

2 & 3

Open

Open

80486DX/DX2

Open

1 & 2

1 & 2

1 & 2

1 & 2

Open

Open

80486DX4

Open

2 & 3

2 & 3

2 & 3

Open

Open

2 & 3

P4S/P24S

Open

2 & 3

2 & 3

2 & 3

2 & 3

Open

2 & 3

P23S

Open

2 & 3

2 & 3

2 & 3

2 & 3

Open

2 & 3

P24T

Open

2 & 3

2 & 3

2 & 3

2 & 3

Open

Open

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CONíT)

Type

JC7

JC8

JC9

CX486SX

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

CX486DX

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

80486DX/DX2/DX4

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

Pentium Overdrive

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

JF1

JF2

JF3

JG13

20MHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

25MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

Open

33MHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

Open

40MHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

50iMHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

Open

50MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

Open

66iMHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

Open

CPU SPEED CONFIGURATION (CONíT)

Speed

JG14

JG15

JC10

JC11

JC13

20MHz

Open

Open

1 & 2

1 & 2

1 & 2

25MHz

1 & 2

Open

1 & 2

1 & 2

1 & 2

33MHz

Open

1 & 2

1 & 2

1 & 2

1 & 2

40MHz

Open

Open

2 & 3

2 & 3

2 & 3

50iMHz

1 & 2

Open

1 & 2

1 & 2

1 & 2

50MHz

1 & 2

Open

2 & 3

2 & 3

2 & 3

66iMHz

Open

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION (DX4)

Speed

JX3

JX4

2x

pins 2 & 3 closed

Open

2.5x

Open

Closed

3x

pins 1 & 2 closed

Open

CPU VOLTAGE CONFIGURATION

Voltage

JX1

JX2

3.3v

pins 2 & 3 closed

Open

3.45v

pins 1 & 2 closed

Open

5v

Open

pins 1 & 2, 3 & 4 closed

BUS SPEED CONFIGURATION

CPU speed

J1

<=33MHz

Open

>33MHz

Closed

VESA WAIT STATE CONFIGURATION

Wait states

J2

0 wait states

Open

1 wait state

Closed