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





ALI 486 NONCACHE

COMPUTREND SYSTEMS, INC.

ALI 486 NONCACHE

Processor

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

Processor Speed

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

Chip Set

ALI

Max. Onboard DRAM

32MB

SRAM Cache

None

BIOS

AMI

Dimensions

220mm x 220mm

I/O Options

Auxiliary keyboard connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Auxiliary keyboard

J1

Turbo switch

J4/pins 15 - 17

Power LED & keylock

J4/pins 1 - 5

Turbo LED

J4/pins 12 & 13

Speaker

J4/pins 7 - 10

External battery

J3

Reset switch

J4/pins 19 & 20

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

J3

connected

 

CMOS memory clear

J3

pins 3 & 4 closed

Factory configured - do not alter

JP1

open

Monitor type select monochrome

JP2

pins 1 & 2 closed

 

Monitor type select color

JP2

pins 2 & 3 closed

CPU JUMPER CONFIGURATION

CPU

Location

JP3

JP4

JP5

JP6

JP7

80486DX2

PGA

open

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

ODP486SX

PGA

open

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 2 & 3

80486DX

PGA

open

pins 2 & 3

pins 2 & 3

pins 2 & 3

pins 2 & 3

80487SX

PGA

open

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 2 & 3

80486SX

PQFP

closed

pins 1 & 2

pins 1 & 2

open

pins 1 & 2

Note:Pins designated should be in the closed position.

CPU SPEED/BUS SPEED CONFIGURATION

CPU Speed

Bus Clock

JP8

JP9

JP10

JP11

16MHz

SYS/4

pins 2 & 3

pins 2 & 3

pins 1 & 2

pins 2 & 3

20MHz

SYS/5

pins 2 & 3

pins 1 & 2

pins 1 & 2

pins 2 & 3

25MHz

SYS/6

pins 1 & 2

pins 2 & 3

pins 1 & 2

pins 2 & 3

33MHz

SYS/8

pins 1 & 2

pins 1 & 2

pins 1 & 2

pins 2 & 3

40MHz

SYS/5

pins 2 & 3

pins 1 & 2

pins 2 & 3

pins 1 & 2

Note:Pins designated should be in the closed position.

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

32MB

(4) 4M x 9

(4) 4M x 9