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S 286 SYSTEM BOARD

UNIDENTIFIED

S 286 SYSTEM BOARD

Processor

80286

Processor Speed

6/10/12/16MHz

Chip Set

VLSI

Video Chip Set

None

Maximum Onboard Memory

4MB

Maximum Video Memory

None

Cache

None

BIOS

Award/Phoenix

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J19

Turbo switch

JP4

Power LED & keylock

J20

Turbo LED

JP5

External battery

J21

Reset switch

JP6

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

DSP/2

On

 

EMS port address select 0E8H - 0EFH

DSP/4

On

 

EMS port address select 098H - 09FH

DSP/4

Off

Factory configured - do not alter

JP2

Unidentified

 

BIOS type select Phoenix

JP7

Pins 1 & 2 closed

 

BIOS type select Award

JP7

Pins 2 & 3 closed

 

EMS type select extended mode

JP8

Open

 

EMS type select expanded mode

JP8

Closed

Factory configured - do not alter

JP10

Unidentified

 

Wait state select 1 wait state

JP11

Pins 1 & 2 closed

 

Wait state select 0 wait states

JP11

Pins 2 & 3 closed

 

Monitor type select monochrome

SW1

Pins 1 & 2 closed

 

Monitor type select color

SW1

Pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

512KB

(18) 41256

None

640KB

(18) 41256

(18) 4164

1MB

(18) 41256

(18) 41256

1MB (EMS)

(18) 41256

(18) 41256

2MB

(18) 411000

None

2MB (EMS)

(18) 411000

None

4MB

(18) 411000

(18) 411000

4MB (EMS)

(18) 411000

(18) 411000

DRAM SWITCH CONFIGURATION

Size

DSP/6

DSP/7

DSP/8

512KB

On

On

On

640KB

On

On

Off

1MB

On

Off

On

1MB (EMS)

On

Off

Off

2MB

Off

On

On

2MB (EMS)

Off

On

Off

4MB

Off

Off

On

4MB (EMS)

Off

Off

Off

DRAM JUMPER CONFIGURATION

Size

J18

256KB

Pins 1 & 2 closed

512KB

Pins 2 & 3 closed

CLOCK SPEED SELECTION

Speed

DSP/1

JP1

Low

On

Pins 2 & 3 closed

High

Off

Pins 2 & 3 closed

Keyboard controlled

N/A

Pins 1 & 2 closed

BIOS SELECTION

Size

JP9

DSP/5

27128

Pins 1 & 2 closed

On

27256

Pins 2 & 3 closed

Off

I/O WAIT STATE SELECTION

Wait states

DSP/3

JP3

4

On

Pins 2 & 3 closed

6

Off

Pins 2 & 3 closed

Keyboard controlled

N/A

Pins 1 & 2 closed