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B815B (VER. B)

MECER CORPORATION

B815B (VER. B)

Processor

80386DX/CX486DLC/CX486M6/80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

128MB

Cache

128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

None

NPU Options

80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

Auxiliary keyboard connector

JP1

Turbo LED

JP27 pins 11 - 12

External battery

JP12

Turbo switch

JP27 pins 16 - 17

Power LED & keylock

JP27 pins 1 - 5

Reset switch

JP27 pins 19 - 20

Speaker

JP27 pins 7 - 10

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

Monitor type select monochrome

JP10

pins 1 & 2 closed

 

Monitor type select color

JP10

pins 2 & 3 closed

»

Battery enabled

JP13

Closed

 

Battery disabled

JP13

Open

»

Factory configured - do not alter

JP17

N/A

»

Factory configured - do not alter

JP18

N/A

»

Factory configured - do not alter

JP21

N/A

»

Factory configured - do not alter

JP22

N/A

»

Factory configured - do not alter

JP28

pins 1 & 2 closed

»

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

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 256K x 9

(4) 4M x 9

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

65MB

(4) 256K x 9

(4) 16M x 9

68MB

(4) 1M x 9

(4) 16M x 9

80MB

(4) 4M x 9

(4) 16M x 9

128MB

(4) 16M x 9

(4) 16M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP24

JP25

128KB

Open

pins 2 & 3 closed

256KB

Closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

J1

JP2

JP3

JP4

80386DX-40 (80MHz)

6 & 8

2 & 3

1 & 2

2 & 3

CX486DLC-40 (80MHz)

6 & 8

2 & 3

2 & 3

2 & 3

CX486M6-33 (33MHz)

5 & 7

2 & 3

2 & 3

1 & 2

CX486M6-33 (66MHz)

1 & 2

2 & 3

2 & 3

1 & 2

CX486M6-40 (40MHz)

1 & 2, 3 & 4

2 & 3

2 & 3

1 & 2

CX486M6-33 (33MHz) C6

5 & 7

2 & 3

2 & 3

1 & 2

CX486M6-33 (66MHz) C6

1 & 2

2 & 3

2 & 3

1 & 2

CX486M6-40 (40MHz) C6

1 & 2, 3 & 4

2 & 3

2 & 3

1 & 2

80486SX-25 (25MHz)

3 & 4, 5 & 7

1 & 2

2 & 3

2 & 3

80486SX-25 (50MHz)

3 & 4

1 & 2

2 & 3

2 & 3

80486SX-33 (33MHz)

5 & 7

1 & 2

2 & 3

2 & 3

80486SX-33 (66MHz)

1 & 2

1 & 2

2 & 3

2 & 3

80486DX-33 (33MHz)

5 & 7

1 & 2

2 & 3

2 & 3

80486DX-33 (66MHz)

1 & 2

1 & 2

2 & 3

2 & 3

80486DX-40 (40MHz)

1 & 2, 3 & 4

1 & 2

2 & 3

2 & 3

80486DX-50 (50MHz)

3 & 4

1 & 2

2 & 3

2 & 3

80486DX2-50 (25MHz)

3 & 4

1 & 2

2 & 3

2 & 3

80486DX2-50 (50MHz)

3 & 4, 5 & 7

1 & 2

2 & 3

2 & 3

80486DX2-66 (33MHz)

5 & 7

1 & 2

2 & 3

2 & 3

80486DX2-66 (66MHz)

1 & 2

1 & 2

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP11

JP14

JP15

JP16

JP19

80386DX-40 (80MHz)

1 & 2

1 & 2

1 & 2

2 & 3

2 & 3

CX486DLC-40 (80MHz)

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

CX486M6-33 (33MHz)

2 & 3

2 & 3

Open

1 & 2

1 & 2

CX486M6-33 (66MHz)

1 & 2

2 & 3

Open

1 & 2

2 & 3

CX486M6-40 (40MHz)

2 & 3

2 & 3

Open

1 & 2

1 & 2

CX486M6-33 (33MHz) C6

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

CX486M6-33 (66MHz) C6

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

CX486M6-40 (40MHz) C6

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

80486SX-25 (25MHz)

2 & 3

2 & 3

Open

1 & 2

1 & 2

80486SX-25 (50MHz)

1 & 2

2 & 3

Open

1 & 2

2 & 3

80486SX-33 (33MHz)

2 & 3

2 & 3

Open

1 & 2

1 & 2

80486SX-33 (66MHz)

1 & 2

2 & 3

Open

1 & 2

2 & 3

80486DX-33 (33MHz)

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

80486DX-33 (66MHz)

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

80486DX-40 (40MHz)

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

80486DX-50 (50MHz)

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

80486DX2-50 (25MHz)

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

80486DX2-50 (50MHz)

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

80486DX2-66 (33MHz)

2 & 3

2 & 3

1 & 2

2 & 3

1 & 2

80486DX2-66 (66MHz)

1 & 2

2 & 3

1 & 2

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP29

JP30

JP31

JP32

JP34

80386DX-40 (80MHz)

Open

Open

Closed

Closed

Open

CX486DLC-40 (80MHz)

Open

Open

Closed

Closed

Closed

CX486M6-33 (33MHz)

Closed

Closed

Open

Open

Open

CX486M6-33 (66MHz)

Closed

Closed

Open

Open

Open

CX486M6-40 (40MHz)

Closed

Closed

Open

Open

Open

CX486M6-33 (33MHz) C6

Open

Open

Closed

Closed

Open

CX486M6-33 (66MHz) C6

Open

Open

Closed

Closed

Open

CX486M6-40 (40MHz) C6

Open

Open

Closed

Closed

Open

80486SX-25 (25MHz)

Open

Open

Closed

Closed

Open

80486SX-25 (50MHz)

Open

Open

Closed

Closed

Open

80486SX-33 (33MHz)

Open

Open

Closed

Closed

Open

80486SX-33 (66MHz)

Open

Open

Closed

Closed

Open

80486DX-33 (33MHz)

Open

Open

Closed

Closed

Open

80486DX-33 (66MHz)

Open

Open

Closed

Closed

Open

80486DX-40 (40MHz)

Open

Open

Closed

Closed

Open

80486DX-50 (50MHz)

Open

Open

Closed

Closed

Open

80486DX2-50 (25MHz)

Open

Open

Closed

Closed

Open

80486DX2-50 (50MHz)

Open

Open

Closed

Closed

Open

80486DX2-66 (33MHz)

Open

Open

Closed

Closed

Open

80486DX2-66 (66MHz)

Open

Open

Closed

Closed

Open