Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

None

BIOS

AMI

Dimensions

220mm x 220mm

I/O Options

Local bus slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

CR1

Turbo switch

JP6

External battery

J1

Local bus

S1

Power LED & keylock

J19

Reset switch

SW1

Speaker

J20

Note: The location of J20 is unidentified.

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

CMOS memory normal operation

JP4

pins 1 & 2 closed

CMOS memory clear

JP4

pins 2 & 3 closed

»

Monitor type select color

JP5

Closed

Monitor type select monochrome

JP5

Open

Note: These settings are unverified.

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

32MB

(4) 4M x 9

(4) 4M x 9

CPU TYPE CONFIGURATION

Type

JP1

JP2

JP3

80486SX

Open

Open

pins 2 & 3 closed

80487SX

pins 2 & 3 closed

Closed

pins 1 & 2 closed

80486DX

pins 1 & 2 closed

Closed

pins 1 & 2 closed

80486DX2

pins 1 & 2 closed

Closed

pins 1 & 2 closed