Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2/ODP586SX

Processor Speed

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

Chip Set

C & T

Max. onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

220mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

JP10

External battery

JP17

Speaker

JP11

Turbo switch

JP32

Power LED & keylock

JP13

32-bit VESA local bus slot

S1

Reset switch

JP15

32-bit VESA local bus slot

S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Factory configured - do not alter

JP1

Closed

»

Factory configured - do not alter

JP9

pins 2 & 3 closed

»

Monitor type select color

JP12

Closed

Monitor type select monochrome

JP12

Open

»

CMOS memory normal operation

JP16

pins 1 & 2 closed

CMOS memory clear

JP16

pins 2 & 3 closed

»

Factory configured - do not alter

JP29

pins 2 & 3 closed

»

Factory configured - do not alter

JP36

pins 1 & 2 closed

»

VESA video card chipset type select S3 or Western Digital

JP37

pins 1 & 2 closed

VESA video card chipset type select other

JP37

pins 2 & 3 closed

»

Factory configured - do not alter

JP38

pins 1 & 2 closed

»

Factory configured - do not alter

JP100

Open

»

Factory configured - do not alter

JP101

Open

»

Factory configured - do not alter

JP102

pins 2 & 3 closed

Note: JP37 is present only on the Rev.1 system boards.

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) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

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

JP6

JP7

JP8

64KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 4 closed

128KB

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

256KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

VESA WAIT STATE (ID2) CONFIGURATION

Wait states

CPU speed

ID2

0 wait states

£ 33MHz

Closed

1 wait state

> 33MHz

Open

VESA BUS SPEED (ID3) CONFIGURATION

CPU speed

ID3

£ 33MHz

Open

> 33MHz

Closed

CPU SPEED CONFIGURATION

Speed

JP30

20MHz

pins 2 & 3 closed

25MHz

pins 2 & 3 closed

33MHz

pins 1 & 2 closed

40i MHz

pins 2 & 3 closed

50i MHz

pins 2 & 3 closed

50MHz

pins 1 & 2 closed

66i MHz

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

JP2

JP3

JP4

JP5

80486SX

pins 1 & 2 closed

Open

Open

Open

80487SX

pins 2 & 3 closed

Closed

pins 1 & 2 closed

Closed

80486DX

pins 2 & 3 closed

Closed

pins 2 & 3 closed

Open

ODP486SX

pins 2 & 3 closed

Closed

pins 1 & 2 closed

Closed

80486DX2

pins 2 & 3 closed

Closed

pins 2 & 3 closed

Open

ODP586SX

pins 2 & 3 closed

Closed

pins 1 & 2 closed

Closed