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AS420N/AS425N/AS433N/AS455N Motherboard Settings and Configuration






ABIT COMPUTER CORPORATION

AS420N/AS425N/AS433N/AS455N

Processor

80486SX/80486DX

Processor Speed

20/25/33/40MHz

Chip Set

SIS

Max. Onboard DRAM

32MB

Cache

None

BIOS

AMI

Dimensions

355mm x 304mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

D6

Reset

JP20

External battery

JP15

Speaker

JP21

Turbo switch

JP19

Power LED & keylock

JP22

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Factory configured - do not alter

JP2

Open

Monitor type select monochrome

JP4

Open

 

Monitor type select color

JP4

Closed

CMOS memory normal operation

JP5

pins 1 & 2 closed

 

CMOS memory clear

JP5

pins 2 & 3 closed

Factory configured - do not alter

JP6

pins 1 & 2 closed

Factory configured - do not alter

JP8

pins 1 & 2 closed

Factory configured - do not alter

JP14

pins 1 & 2 closed

Factory configured - do not alter

JP17

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

CPU TYPE CONFIGURATION

Type

JP26

JPX5

80486SX

Closed

Open

80486DX

Open

Closed










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