...because we can't all be on the bleeding edge...





AR4

ABIT COMPUTER CORPORATION

AR4

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

40/50(internal)/60/66(internal)MHz

Chip Set

ALI

Max. Onboard DRAM

32MB

Cache

None

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J4

Turbo switch/LED

J21

Reset switch

J19

Keylock

J22

Speaker

J20

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP1

pins 2 & 3 closed

 

Monitor type select monochrome

JP1

pins 1 & 2 closed

 

Factory configured - do not alter

JP2

on

 

CPU set at 80486SX (PQFP)

JP7

pins 1 & 2 closed

 

CPU set at 80486SX (PGA)

JP7

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

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

CPU Type

JP4

JP5

80486SX

Open

pin 1 & 2 closed

80487SX

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

80486DX2

pins 2 & 3 closed

pins 2 & 3 closed

AT BUS CLOCK CONFIGURATION

Speed

JP3

JP6

40MHz

pins 2 & 3 closed

pins 1 & 2 closed

50MHz

pins 1 & 2 closed

pins 2 & 3 closed

66MHz

pins 1 & 2 closed

pins 1 & 2 closed