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SUPER 486 REV: D2

PRECISION AMERICA, INC.

SUPER 486 REV: D2

Processor

80486SX/80486DX

Processor Speed

20/25/33MHz

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

64/128/256/1024KB

BIOS

AM/MR/Phoenix

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

JP1

Turbo switch

JP10

Reset switch

JP2

Turbo LED

JP11

Power LED & keylock

JP5

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Ľ

Factory configured - do not alter

JP3

Pins 2 & 3 closed

Ľ

Monitor type select monochrome/EGA

JP6

Open

 

Monitor type select color

JP6

Closed

 

CPU frequency select 1x

JP27

Closed

 

CPU frequency select 2x

JP27

Open

 

Wait state select 0 wait states

JP32

Closed

 

Wait state select 1 wait state

JP32

Open

Ľ

Factory configured - do not alter

JP33

Pins 2 & 3 closed

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

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 256K x 9

(4) 4M x 9

17MB

(4) 4M x 9

(4) 256K x 9

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

None

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

1MB

(4) 128K x 8

(4) 128K x 8

(1) 128K x 8

CACHE JUMPER CONFIGURATION

Size

JP22

JP23

JP24

JP25

JP26

64KB

1 & 2

1 & 2

1 & 2

1 & 2

Open

128KB

2 & 3

1 & 2

1 & 2

1 & 2

Closed

256KB

2 & 3

2 & 3

1 & 2

1 & 2

Open

1MB

2 & 3

2 & 3

2 & 3

2 & 3

Open

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CONíT)

Size

JP28

JP34

JP35

JP36

JP37

64KB

Closed

1 & 2

2 & 3

2 & 3

2 & 3

128KB

Open

Open

1 & 2

1 & 2

1 & 2

256KB

Closed

2 & 3

2 & 3

2 & 3

2 & 3

1MB

Closed

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CONíT)

Size

JP38

JP39

JP40

JP41

JP42

64KB

Open

2 & 3

2 & 3

Open

2 & 3

128KB

Closed

Open

1 & 2

Closed

2 & 3

256KB

Open

2 & 3

2 & 3

Open

2 & 3

1MB

Open

2 & 3

2 & 3

Open

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

J12

JP13

JP14

80486SX

Open

Pins 2 & 3 closed

Open

80486DX

Closed

Pins 1 & 2 closed

Closed