Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Reset switch

J4

Speaker

J2

Turbo LED

J5

Turbo switch

J3

External battery

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Battery type select - internal

W22

Closed

Battery type select - external

W22

Open

»

Monitor type select monochrome/EGA/VGA

W18

Open

Monitor type select CGA

W18

Closed

DRAM CONFIGURATION

Size

A

B

C

D

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

3MB

(4) 256K x 9

(4) 256K x 9

(1) 256K x 36

NONE

4MB

(4) 256K x 9

(4) 256K x 9

(1) 256K x 36

(1) 256K x 36

4MB

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

(4) 256K x 9

(4) 1M x 9

(1) 1M x 36

NONE

10MB

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

(1) 1M x 36

12MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(4) 1M x 9

16MB

(4) 4M x 9

NONE

NONE

NONE

20MB

(4) 1M x 9

(4) 4M x 9

NONE

NONE

24MB

(4) 1M x 9

(4) 4M x 9

(1) 1M x 36

NONE

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

40MB

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

DRAM JUMPER CONFIGURATION

Bank

W12

W13

W15

W16

Bank 0 = A, Bank 1 = B, Bank 2 = C, Bank 3 = D

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 1 & 2

Bank 0 = C, Bank 1 = D, Bank 2 = A, Bank 3 = B

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

Note:Pins designated should be in the closed position.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

U10 (Dirty Bit)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 16K x 4

128KB

(4) 32K x 8

NONE

(1) 8K x 8

(1) 16K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

(1) 16K x 4

CACHE JUMPER CONFIGURATION

Size

W2

W3

W4

W5

W6

W7

W8

W9

64KB

1 & 2

1 & 2

Open

1 & 2

Open

Open

Open

Open

128KB

2 & 3

1 & 2

1 & 2

2 & 3

Closed

Open

Open

Closed

256KB

2 & 3

2 & 3

2 & 3

1 & 2

Closed

Closed

Closed

Closed

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

W10

W11

80486SX

Open

pins 2 & 3 closed

80487SX

pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

80486DX

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed

80486DX2

pins 1 & 2 closed

pins 1 & 2, 3 & 4 closed