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





286-12/16/20

UNIDENTIFIED

286-12/16/20

Processor

80286

Processor Speed

12/16/20MHz

Chip Set

Acer

Max. Onboard DRAM

4MB

Cache

None

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Reset switch

CN3

Speaker

CN1

Turbo switch

CN4

Turbo LED

CN2

Power LED & keylock

CN5

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

 

Coprocessor synchronous with CPU

J2

pins 2 & 3 closed

 

Coprocessor asynchronous with CPU (need extra OSC)

J2

pins 1 & 2 closed

8 bit BIOS enabled

J3

Closed

 

16 bit BIOS enabled

J3

Open

Bus speed select AT clock

J4

Closed

 

Bus speed select 1/2 CPU clock

J4

Open

Parity check enabled

J5

Open

 

Parity check disabled

J5

Closed

CMOS memory normal operation

J7

Open

 

CMOS memory clear

J7

Closed

Monitor type select monochrome

J8

pins 1 & 2 closed

 

Monitor type select color

J8

pins 2 & 3 closed

Internal battery enabled

J9

pins 2 & 3 closed

 

External battery enabled

J9

pins 1 & 2 closed

Note:The exact location of jumper J7 is unidentified by the manufacturer.

DRAM CONFIGURATION

Size

Bank 0

Parity 0

Bank 1

Parity 1

512KB

(4) 44256

(2) 41256

NONE

NONE

640KB

(4) 44256

(2) 41256

(4) 4464

(2) 4164

640KB

(2) 256K x 9

(2) 41256

(4) 4464

(2) 4164

1024KB

(4) 44256

(2) 41256

(4) 44256

(2) 4164

1024KB

(2) 256K x 9

NONE

(2) 256K x 9

NONE

2048KB

(2) 1M x 9

NONE

NONE

NONE

4096KB

(2) 1M x 9

NONE

(2) 1M x 9

NONE