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286/SUPRA (MODEL C) Motherboard Settings and Configuration






INFORMTECH INTERNATIONAL, INC.

286/SUPRA (MODEL C)

Processor

80286

Processor Speed

6/8/10/12/16/20MHz

Chip Set

C & T

Max. Onboard DRAM

2MB

SRAM Cache

None

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

16-bit external memory card slot, auxillary keyboard connector

NPU Options

80287

CONNECTIONS

Purpose

Location

Purpose

Location

Auxiliary keyboard

J9

Power LED & keylock

P5

Turbo LED

P2

External battery

P8

Speaker

P3

16-bit external memory card

S1

Reset switch

P4

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

 

BIOS type select 27256

J4

pins 2 & 3 closed

 

BIOS type select 27128

J4

pins 1 & 2 closed

Keyboard controller clock speed select 6MHz

J5

pins 1 & 2 closed

 

Keyboard controller clock speed select 12MHz

J5

pins 2 & 3 closed

 

Battery type select Alkaline 4.5VDC

J7

closed

 

Battery type select Lithium 6VDC

J7

open

Power good signal detect from power supply

J8

pins 2 & 3 closed

 

Power good signal detect from board

J8

pins 1 & 2 closed

 

Monitor type select color

SW1/Switch 3

closed

 

Monitor type select monochrome

SW1/Switch 3

open

CPU SPEED/BUS CLOCK CONFIGURATION

CPU Speed

AT Bus Speed

J2

J3

J10

J13

J14

20MHz

8MHz

pins 1 & 2

pins 1 & 2

pins 2 & 3

open

open

20MHz

10MHz

N/A

pins 1 & 2

pins 2 & 3

closed

open

20MHz

12MHz

pins 2 & 3

pins 1 & 2

pins 2 & 3

open

open

16MHz

8MHz

pins 1 & 2

pins 1 & 2

pins 1 & 2

open

open

16MHz

12MHz

pins 2 & 3

pins 1 & 2

pins 1 & 2

open

open

12MHz

6MHz

N/A

pins 2 & 3

N/A

closed

open

12MHz

8MHz

pins 1 & 2

pins 2 & 3

N/A

open

open

12MHz

12MHz

pins 2 & 3

N/A

N/A

open

closed

10MHz

10MHz

N/A

pins 1 & 2

pins 2 & 3

closed

closed

8MHz

8MHz

pins 1 & 2

N/A

N/A

open

closed

6MHz

6MHz

N/A

pins 2 & 3

N/A

closed

closed

Note:Pins designated should be in the closed position.

NPU CLOCK RATE CONFIGUARATION

NPU

Clock Rate

SW1/Switch 1

SW1/Switch 2

80287-8

6MHz

closed

closed

80287-8

8MHz

open

closed

80287-10

10MHz

closed

open

80287-12

12MHz

open

open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

J11

J12

512KB

(18) 41256

NONE

open

open

1MB

(18) 41256

(18) 41256

closed

open

2MB

(18) 411000

NONE

open

closed

4MB

(18) 411000

(18) 411000

closed

closed








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