...because we can't all be on the bleeding edge...





B800/B820 (REV. A)

MECER CORPORATION

B800/B820 (REV. A)

Processor

80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP2

Speaker

JP34 pins 6 - 10

External battery

JP31

Turbo LED

JP34 pins 11 - 15

Auxiliary keyboard connector

JP33

Turbo switch

JP34 pins 16 - 17

Power LED & keylock

JP34 pins 1 - 5

Reset switch

JP34 pins 19 - 20

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Ľ

Monitor type select color

JP3

Open

 

Monitor type select monochrome

JP3

Closed

Ľ

CMOS memory normal operation

JP6

pins 1 & 2 closed

 

CMOS memory clear

JP6

pins 2 & 3 closed

Ľ

Factory configured - do not alter

JP20

N/A

Ľ

Internal battery enabled

JP32

Closed

 

Internal battery disabled

JP32

Open

Ľ

Factory configured - do not alter

JP41

N/A

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

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TG1

TG2

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

(4) 32K x 8

NONE

(1) 8K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

CACHE JUMPER CONFIGURATION (80386DX-40)

Size

JP8A

JP8B

JP8C

JP8E

JP8F

JP12

JP13

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80386DX-40 CONíT)

Size

JP30

JP40

W1A

W1B

W1C

W2A

W2C

64KB

1 & 2

1 & 2, 7 & 8

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

128KB

1 & 2

1 & 2, 7 & 8

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

256KB

1 & 2

1 & 2, 7 & 8

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80386DX-40 CONíT)

Size

W2D

W2E

W2G

W2H

W3A

W3B

W4

64KB

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

128KB

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

256KB

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CX486DLC-33)

Size

JP8A

JP8B

JP8C

JP8E

JP8F

JP12

JP13

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CX486DLC-33 CONíT)

Size

JP30

JP40

W1A

W1B

W1C

W2A

W2C

64KB

1 & 2

1 & 2, 5 & 6

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

128KB

1 & 2

1 & 2, 5 & 6

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

256KB

1 & 2

1 & 2, 5 & 6

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (CX486DLC-33 CONíT)

Size

W2D

W2E

W2G

W2H

W3A

W3B

W4

64KB

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

1 & 2

2 & 3

128KB

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

1 & 2

2 & 3

256KB

2 & 3

2 & 3

2 & 3

2 & 3

1 & 2

1 & 2

2 & 3

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486SX-20)

Size

JP8A

JP8B

JP8C

JP8E

JP8F

JP12

JP13

JP30

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

2 & 3

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

256KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486SX-20 CONíT)

Size

JP40

W1A

W1B

W1C

W2A

64KB

1 & 2, 3 & 4, 5 & 6, 7 & 8

1 & 2

1 & 2

1 & 2

1 & 2

128KB

1 & 2, 3 & 4, 5 & 6, 7 & 8

1 & 2

1 & 2

1 & 2

1 & 2

256KB

1 & 2, 3 & 4, 5 & 6, 7 & 8

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486SX-20 CONíT)

Size

W2C

W2D

W2E

W2G

W2H

W3A

W3B

W4

64KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

128KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

256KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486SX-25)

Size

JP8A

JP8B

JP8C

JP8E

JP8F

JP12

JP13

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

2 & 3

2 & 3

256KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486SX-25 CONíT)

Size

JP30

JP40

W1A

W1B

W1C

W2A

W2C

64KB

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

128KB

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486SX-25 CONíT)

Size

W2D

W2E

W2G

W2H

W3A

W3B

W4

64KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

128KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

256KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80487SX-20)

Size

JP8A

JP8B

JP8C

JP8E

JP8F

JP12

JP13

JP30

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

256KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

2 & 3

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80487SX-20 CONíT)

Size

JP40

W1A

W1B

W1C

W2A

64KB

1 & 2, 3 & 4, 5 & 6, 7 & 8

1 & 2

1 & 2

1 & 2

1 & 2

128KB

1 & 2, 3 & 4, 5 & 6, 7 & 8

1 & 2

1 & 2

1 & 2

1 & 2

256KB

1 & 2, 3 & 4, 5 & 6, 7 & 8

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80487SX-20 CONíT)

Size

W2C

W2D

W2E

W2G

W2H

W3A

W3B

W4

64KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

128KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

256KB

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX-33)

Size

JP8A

JP8B

JP8C

JP8E

JP8F

JP12

JP13

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX-33 CONíT)

Size

JP30

JP40

W1A

W1B

W1C

W2A

W2C

64KB

1 & 2

5 & 6

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

128KB

1 & 2

5 & 6

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

256KB

1 & 2

5 & 6

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX-33 CONíT)

Size

W2D

W2E

W2G

W2H

W3A

W3B

W4

64KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

128KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

256KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX-50)

Size

JP8A

JP8B

JP8C

JP8E

JP8F

JP12

JP13

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX-50 CONíT)

Size

JP30

JP40

W1A

W1B

W1C

W2A

W2C

64KB

1 & 2

Open

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

128KB

1 & 2

Open

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

256KB

1 & 2

Open

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX-50 CONíT)

Size

W2D

W2E

W2G

W2H

W3A

W3B

W4

64KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

128KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

256KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX2-50)

Size

JP8A

JP8B

JP8C

JP8E

JP8F

JP12

JP13

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX2-50 CONíT)

Size

JP30

JP40

W1A

W1B

W1C

W2A

W2C

64KB

1 & 2

5 & 6, 7 & 8

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

128KB

1 & 2

5 & 6, 7 & 8

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

256KB

1 & 2

5 & 6, 7 & 8

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX2-50 CONíT)

Size

W2D

W2E

W2G

W2H

W3A

W3B

W4

64KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

128KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

256KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX2-66)

Size

JP8A

JP8B

JP8C

JP8E

JP8F

JP12

JP13

64KB

2 & 3

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

1 & 2

128KB

1 & 2

2 & 3

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

256KB

2 & 3

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX2-66 CONíT)

Size

JP30

JP40

W1A

W1B

W1C

W2A

W2C

64KB

1 & 2

5 & 6

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

128KB

1 & 2

5 & 6

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

256KB

1 & 2

5 & 6

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (80486DX2-66 CONíT)

Size

W2D

W2E

W2G

W2H

W3A

W3B

W4

64KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

128KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

256KB

1 & 2

1 & 2

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.