SOYO COMPUTER CO., LTD.

486DX/SX BOARD

Processor

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

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

64MB

Cache

None

BIOS

Award

Dimensions

330mm x 220mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J17

External battery

J20

Speaker

J18

Turbo switch

J21

Reset switch

J19

Turbo LED

J22

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select monochrome

JP3

Open

 

Monitor type select color

JP3

Closed

»

CMOS memory normal operation

JP5

pins 1 & 2 closed

 

CMOS memory clear

JP5

pins 2 & 3 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

32MB

(4) 4M x 9

(4) 4M x 9

CPU CONFIGURATION

Type

JP101

JP102

JP103

JP104

80486SX

Open

pins 2 & 3 closed

Open

pins 2 & 3 closed

80487SX

Closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

ODP486SX

Closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

80486DX

Closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

80486DX2

Closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

Note:Board may be factory configured with a surface mounted 80486SX.