PA286 Motherboard Settings and Configuration

Processor

80286

Processor Speed

12/16MHz

Chip Set

Peaktron

Max. Onboard DRAM

4MB

Cache

None

BIOS

AMI

Dimensions

330mm x 220mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

J1

Speaker

J12

Reset switch

J2

Turbo switch

J13

Power LED & keylock

J9

External battery

JP1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

NPU mode select synchronous with CPU

J3

pins 2 & 3 closed

NPU mode select asynchronous with CPU

J3

pins 1 & 2 closed

»

Parity check enabled

J4

Closed

Parity check disabled

J4

Open

»

Shadow BIOS ROM enabled

J5

Open

Shadow BIOS ROM disabled

J5

Closed

»

DRAM select 0 wait states

J7

Closed

DRAM select 1 wait state

J7

Open

»

Bus speed select ATCLK/2

J8

Open

Bus speed select ATCLK/3

J8

Closed

»

CPU speed select switchable at turbo switch

J14

Open

CPU speed select switchable at keyboard

J14

pins 1 & 2 closed

»

Monitor type select monochrome

J15

Open

Monitor type select color

J15

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(4) 44256

NONE

NONE

NONE

1MB

(4) 44256

(4) 44256

NONE

NONE

2MB

NONE

NONE

(16) 441000

NONE

4MB

NONE

NONE

(16) 441000

(16) 441000

Note: Bank 0 = U65, U69, U74, U78, Bank 1 = U39, U43, U50, U54, Bank 2 = U65 - U72, U74 - U81, Bank 3 = U39 - U46, U50 - U57

DRAM PARITY CONFIGURATION

Size

U38

U49

U64

U73

512KB

NONE

NONE

(1) 41256

(1) 41256

1MB

(1) 41256

(1) 41256

(1) 41256

(1) 41256

2MB

NONE

NONE

(1) 411000

(1) 411000

4MB

(1) 411000

(1) 411000

(1) 411000

(1) 411000

DRAM JUMPER CONFIGURATION

Size

J6

J10

512KB

Open

pins 2 & 3 closed

1MB

Open

pins 2 & 3 closed

2MB

Closed

pins 1 & 2 closed

4MB

Closed

pins 1 & 2 closed