JPN CORPORATION

MB-486 DX-33 UM

   

Processor

80486SX/80487SX/80486DX

Processor Speed

33MHz

Chip Set

UMC

Max. Onboard DRAM

40MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

   

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Reset switch

J4

Speaker

J2

Turbo LED

J5

Turbo switch

J3

External battery

J6

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select CGA

W18

Closed

 

Monitor type select monochrome/EGA/VGA

W18

Open

»

Battery select internal

W22

Closed

 

Battery select external

W22

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB 1

(4) 256K x 9

NONE

NONE

NONE

1MB 2

NONE

NONE

(1) 256K x 36

NONE

2MB 1

(4) 256K x 9

(4) 256K x 9

NONE

NONE

2MB 2

NONE

NONE

(1) 256K x 36

(1) 256K x 36

3MB 1

(4) 256K x 9

(4) 256K x 9

(1) 256K x 36

NONE

3MB 2

(4) 256K x 9

NONE

(1) 256K x 36

(1) 256K x 36

4MB 1

(4) 256K x 9

(4) 256K x 9

(1) 256K x 36

(1) 256K x 36

4MB 2

(4) 256K x 9

(4) 256K x 9

(1) 256K x 36

(1) 256K x 36

4MB 1

(4) 1M x 9

NONE

NONE

NONE

4MB 2

NONE

NONE

(1) 1M x 36

NONE

5MB 1

(4) 256K x 9

(4) 1M x 9

NONE

NONE

5MB 2

NONE

NONE

(1) 256K x 36

(1) 1M x 36

6MB 1

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

NONE

6MB 2

(4) 1M x 9

NONE

(1) 256K x 36

(1) 256K x 36

8MB 1

(4) 1M x 9

(4) 1M x 9

NONE

NONE

8MB 2

NONE

NONE

(1) 1M x 36

(1) 1M x 36

9MB 1

(4) 256K x 9

(4) 1M x 9

(1) 1M x 36

NONE

9MB 2

(4) 1M x 9

NONE

(1) 256K x 36

(1) 1M x 36

10MB 1

(4) 256K x 9

(4) 256K x 9

(1) 1M x 36

(1) 1M x 36

10MB 2

(4) 1M x 9

(4) 1M x 9

(1) 256K x 36

(1) 256K x 36

12MB 1

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

NONE

12MB 2

(4) 1M x 9

NONE

(1) 1M x 36

(1) 1M x 36

16MB 1

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB 2

(4) 1M x 9

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

16MB 1

(4) 4M x 9

NONE

NONE

NONE

16MB 2

NONE

NONE

(1) 4M x 36

NONE

20MB 1

(4) 1M x 9

(4) 4M x 9

NONE

NONE

20MB 2

NONE

NONE

(1) 1M x 36

(1) 4M x 36

24MB 1

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

NONE

24MB 2

(4) 4M x 9

NONE

(1) 1M x 36

(1) 1M x 36

32MB 1

(4) 4M x 9

(4) 4M x 9

NONE

NONE

32MB 2

NONE

NONE

(1) 4M x 36

(1) 4M x 36

40MB 1

(4) 1M x 9

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

40MB 2

(4) 4M x 9

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

Note 1 :On jumpers W12, W13, W15, and W16 - pins 1 & 2 should be in the closed position.

Note 2 :On jumpers W12, W13, W15, and W16 - pins 2 & 3 should be in the closed position.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

Dirty Bit (U10)

TAG (U11)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 16K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 16K x 8

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 16K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

W2

W3

W4

W5

W6

W7

W8

W9

64KB

1 & 2

1 & 2

Open

1 & 2

Open

Open

Open

Open

128KB

2 & 3

1 & 2

1 & 2

2 & 3

Closed

Open

Open

Open

256KB

2 & 3

2 & 3

2 & 3

1 & 2

Closed

Closed

Closed

Closed

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

W10

W11

80486SX

Open

pins 2 & 3 closed

80487SX

pins 2 & 3 closed

pins 1 & 2 and 3 & 4 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 and 3 & 4 closed