Processor

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

Processor Speed

25/33/50(internal)/50MHz

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

220mm x 220mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Speaker

J7

Turbo LED

J4

Power LED & keylock

J8

Turbo switch

J5

32-bit VESA Local bus slot

S1

Reset switch

J6

32-bit VESA Local bus slot

S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

JP1

pins 2 & 3 closed

Monitor type select monochrome

JP1

pins 1 & 2 closed

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

(2) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP8

JP9

JP10

JP11

64KB

Open

Open

pins 1 & 2 closed

pins 1 & 2 closed

128KB

Open

Closed

pins 2 & 3 closed

pins 2 & 3 closed

256KB

Closed

Closed

pins 2 & 3 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

JP14

JP15

80486SX

pins 2 & 3 closed

Open

80487SX

pins 1 & 2 and 3 & 4 closed

pins 2 & 3 closed

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

CPU SPEED CONFIGURATION

Speed

JP4

JP5

JP6

JP7

25MHz

Closed

Closed

Open

Open

33MHz

Closed

Open

Open

Open

50i MHz

Closed

Closed

Open

Open

50MHz

Open

Open

Open

Open

VESA WAIT STATE/BUS SPEED CONFIGURATION

CPU speed

Wait states

JP12

JP13

£ 33MHz

0 wait states

Open

Open

> 33MHz

1 wait state

Closed

Closed