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AIM486CQ

AIM MOTHERBOARD COMPANY

AIM486CQ

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33/50MHz

Chip Set

VLSI

Max. onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP5

Reset switch

JP32

Turbo switch

JP30

Speaker

JP33

Turbo LED

JP31

Power LED & keylock

JP34

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Monitor type select color

JP1

Closed

 

Monitor type select monochrome

JP1

Open

CMOS memory normal operation

JP6

pins 1 & 2 closed

 

CMOS memory clear

JP6

pins 2 & 3 closed

NPU select 0 wait states

JP18

Open

 

NPU select 1 wait state

JP18

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

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

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

(1) 8K x 4

128KB

(4) 32K x 8

NONE

(1) 8K x 4

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 4

CACHE JUMPER CONFIGURATION

Size

JP11

JP12

JP13

JP14

JP40

JP41

64KB

Open

Open

Open

Open

Open

pins 2 & 3

128KB

Open

pins 1 & 2

pins 2 & 3

Closed

Open

pins 1 & 2

256KB

Closed

pins 1 & 2

pins 1 & 2

Closed

Closed

pins 2 & 3

Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JP15

JP22

JP23

20MHz

pins 2 & 3 closed

Open

Open

25MHz

pins 1 & 2 closed

Closed

Open

33MHz

pins 1 & 2 closed

Open

Closed

50MHz

pins 1 & 2 closed

Closed

Closed

CPU TYPE CONFIGURATION

TYPE

JP2

JP3

JP7

JP8

80486SX

Open

pins 2 & 3 closed

Open

Closed

80487SX

pins 1 & 2 closed

pins 1 & 2 closed

Closed

Open

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

Open

Closed