Processor

80486SX/CX487S/80486DX/80486DX2

Processor Speed

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

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J3

Reset switch

J7

Speaker

J4

32-bit VESA local bus slot

S1

Turbo LED

J5

32-bit VESA local bus slot

S2

Turbo switch

J6

32-bit VESA local bus slot

S3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

J8

N/A

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 4M x 9

(4) 256K x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

32KB

(4) 32K x 8

NONE

(1) 8K x 8

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

JP4

JP5

JP6

JP7

JP8

32KB

None

None

None

None

None

64KB

Open

pins 1 & 2

Open

Closed

Closed

128KB

pins 2 & 3

pins 2 & 3

Open

Closed

Closed

256KB

pins 1 & 2

pins 1 & 2

Open

Closed

Closed

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP3

JP13

JP14

80486SX

N/A

pins 1 & 2 closed

pins 1 & 2 and 3 & 4

CX487S

Closed

N/A

N/A

80487SX

N/A

Open

pins 2 & 3 closed

80486DX

N/A

pins 1 & 2 closed

pins 1 & 2 and 3 & 4

80486DX2

N/A

pins 1 & 2 closed

pins 1 & 2 and 3 & 4

ODP486SX

N/A

pins 2 & 3 closed

pins 1 & 2 and 3 & 4

Note:Pins designated should be in the closed position.

VESA BUS SPEED CONFIGURATION

Speed

JP9

JP16

< 33MHz

Open

pins 1 & 2 closed

> 33MHz

Closed

pins 2 & 3 closed