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GA-486SA

GIGA-BYTE TECHNOLOGY CO., LTD.

GA-486SA

Processor

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

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

128MB

Cache

64/128/256/512KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit local bus card slots (2)

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo switch

J4

Reset

J2

Turbo LED

J5

Speaker

J3

32-bit local bus cards (2)

S1 & S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CPU type select 80486DX

J6

pins 1 & 2 closed

 

CPU type select 80486SX

J6

pins 2 & 3 closed

Monitor type select color

J14

Closed

 

Monitor type select monochrome

J14

Open

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

64MB

(4) 16M x 9

NONE

128MB

(4) 16M x 9

(4) 16M 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

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

J8

J9

J10

J11

64KB

Open

Open

Open

Open

128KB

Open

Closed

Open

pins 1 & 2 closed

256KB

Open

Closed

Closed

pins 2 & 3 closed

512KB

Closed

Closed

Closed

pins 1 & 2 closed