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GA-486QS

GIGA-BYTE TECHNOLOGY CO., LTD.

GA-486QS

Processor

80486SX/80486DX

Processor Speed

20/25/33MHz

Chip Set

ETEQ

Max. Onboard DRAM

32MB

Cache

64/256KB

BIOS

AMI/MR

Dimensions

330.2mm x 218.4mm

I/O Options

32-bit external memory card slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

J3

Turbo LED

JP7

Turbo switch

J4

External battery

JP9

Speaker

JP2

32-bit external memory card

S1

Power LED & keylock

JP6

 

 

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP8

Closed

 

CMOS memory clear

JP8

Open

Monitor type select color

JP26

pins 1 & 2 closed

 

Monitor type select monochrome

JP26

pins 2 & 3 closed

CPU type select 80486SX

JP31

pins 2 & 3 closed

 

CPU type select 80486DX

JP31

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

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

TAG

64KB

(8) 8K x 8

(2) 16K x 4

256KB

(8) 32K x 8

(2) 16K x 4

CACHE JUMPER CONFIGURATION

Size

JP18

JP19

JP20

JP21

JP22

64KB

Open

Open

pins 2 & 3 closed

pins 2 & 3 closed

Open

256KB

Closed

Closed

pins 1 & 2 closed

pins 1 & 2 closed

Closed

Note: Main board may be factory configured with 256KB cache in which case JP18 - JP22 will not be present