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486SX/DX/DX2

UNIDENTIFIED

486SX/DX/DX2

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

16/20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

UMC

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

Award

Dimensions

254mm x 220mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J2

Reset switch

J6

Power LED & keylock

J3

External battery

J11

Turbo switch

J4

32-bit VESA local bus slots

SL1 & SL2

Turbo LED

J5

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

PQFP CPU disabled

JP8

Open

 

PQFP CPU enabled

JP8

Closed

VESA video card select normal

JP16

pins 1 & 2 closed

 

VESA video card select Power A9000

JP16

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

1MB

NONE

(1) 256K x 36

2MB

(4) 256K x 9

(1) 256K x 36

4MB

(4) 1M x 9

NONE

4MB

NONE

(1) 1M x 36

5MB

(4) 1M x 9

(1) 256K x 36

8MB

(4) 1M x 9

(1) 1M x 36

16MB

(4) 4M x 9

NONE

16MB

NONE

(1) 4M x 36

17MB

(4) 4M x 9

(1) 256K x 36

20MB

(4) 4M x 9

(1) 1M x 36

32MB

(4) 4M x 9

(1) 4M x 36

64MB

(4) 16M x 9

NONE

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP1

JP2

JP4

JP5

64KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

128KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP6

JP7

80486SX

pins 2 & 3 closed

Open

80487SX

pins 1 & 2, 3 & 4 closed

pins 2 & 3 closed

80486DX

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

80486DX2

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

JP9

JP10

JP11

JP12

16MHz

Closed

Closed

Closed

Closed

20MHz

Open

Closed

Closed

Open

25MHz

Closed

Open

Closed

Open

33MHz

Closed

Closed

Open

Open

40MHz

Open

Open

Closed

Open

50iMHz

Closed

Open

Closed

Open

50MHz

Open

Closed

Open

Open

66iMHz

Closed

Closed

Open

Open

BUS SPEED CONFIGURATION

CPU speed

ID3

<= 33MHz

Open

> 33MHz

Closed