GIGA-BYTE TECHNOLOGY CO., LTD.

GA-486PA

Processor

80486SX/80486DX/80486DX2

Processor Speed

16/20/25/33/50(internal)/50/66(internal)MHz

Chip Set

OPTi

Max. Onboard DRAM

32MB

Cache

64/128/256/512KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo switch

J4

Reset switch

J2

Turbo LED

J5

Speaker

J3

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select color

J23

Closed

 

Monitor type select monochrome

J23

Open

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

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

(2) 32K x 1

128KB

(4) 32K x 8

NONE

(2) 32K x 1

256KB

(4) 32K x 8

(4) 32K x 8

(2) 32K x 1

512KB

(4) 128K x 8

NONE

(2) 32K x 1

CACHE JUMPER CONFIGURATION

Size

JP8

JP17

JP18

JP19

64KB

pins 2 & 3 closed

Open

Open

Open

128KB

pins 1 & 2 closed

Closed

Open

Open

256KB

pins 2 & 3 closed

Closed

Closed

Open

512KB

pins 1 & 2 closed

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

J7

80486SX

pins 1 & 2 closed

80486DX

pins 2 & 3 closed

80486DX2

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

J6

16MHz

Closed

20MHz

Closed

25MHz

Open

33MHz

Open

50iMHz

Open

50MHz

Open

66iMHz

Open