Processor

80486SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

SIS

Max. Onboard DRAM

128MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

J3

Speaker

J6

Turbo switch

J4

Power LED & keylock

JP7

Reset switch

J5

32-bit VESA Local bus slots

S1 & S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

JP14

Open

Monitor type select monochrome

JP14

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

128MB

(4) 16M x 9

(4) 16M x 9

CACHE CONFIGURATION

Size

Max Cachable

Bank 0

Bank 1

TAG

Dirty Bit

64KB

16MB

(4) 8K x 8

(4) 8K x 8

(2) 16K x 4

(1) 16K x 4

128KB

32MB

(4) 32K x 8

NONE

(2) 16K x 4

(1) 16K x 4

256KB

64KB

(4) 32K x 8

(4) 32K x 8

(2) 16K x 4

(1) 16K x 4

CACHE JUMPER CONFIGURATION

Size

JP3

JP4

JP10

JP11

JP12

JP13

64KB

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

128KB

pins 2 & 3

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 2 & 3

256KB

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 4 & 5

pins 2 & 3

pins 2 & 3

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP8

JP9

80486SX

pins 2 & 3 closed

Open

80486DX

pins 1 & 2 and 3 & 4 closed

pins 1 & 2 closed

ODP486SX

pins 1 & 2 and 3 & 4 closed

pins 2 & 3 closed

80486DX2

pins 1 & 2 and 3 & 4 closed

pins 1 & 2 closed

VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION

CPU speed

Wait states

JP5 (ID3)

JP6 (ID2)

£ 33MHz

0 wait states

Open

Open

> 33MHz

1 wait state

Closed

Closed