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MB4D33L

UNIDENTIFIED

MB4D33L

Processor

80386DX/TI486DLC/80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI/Award

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP4

Turbo switch

JP18

Speaker

JP15

Reset switch

JP25

Power LED & keylock

JP16

32-bit VESA local bus slots

SL1 & SL2

Turbo LED

JP17

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

I/O bus speed select CLKIN/4

JP5

Closed

 

I/O bus speed select CLKIN/5

JP5

Open

Monitor type select color

JP6

Closed

 

Monitor type select monochrome

JP6

Open

CMOS memory normal operation

JP14

pins 1 & 2 closed

 

CMOS memory clear

JP14

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

20MB

(4) 1M x 9

(4) 4M 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) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP1

JP2

JP3

64KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

128KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

JP7

JP8

JP11

JP13

80386DX

Open

Open

pins 2 & 3 closed

Open

TI486DLC

Closed

Closed

pins 2 & 3 closed

Open

80486SX

Open

Open

pins 1 & 2 closed

Closed

80486DX

Open

Open

pins 1 & 2 closed

Closed

80486DX2

Open

Open

pins 1 & 2 closed

Closed

CPU TYPE CONFIGURATION (80486 ONLY)

Type

JP9

JP10

80486SX

pins 2 & 3 closed

pins 2 & 3 closed

80486DX

pins 1 & 2 closed

pins 1 & 2 closed

80486DX2

pins 1 & 2 closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION (80386 ONLY)

Speed

JP12

JP19

JP20

JP21

JP22

JP23

JP24

25MHz

1 & 2

Open

2 & 3

1 & 2

Open

Closed

Open

33MHz

1 & 2

Open

2 & 3

1 & 2

Open

Open

Closed

40MHz

1 & 2

Closed

2 & 3

1 & 2

Closed

Open

Open

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION (80486 ONLY)

Speed

JP12

JP19

JP20

JP21

JP22

JP23

JP24

20MHz

1 & 2

Open

1 & 2

1 & 2

Open

Closed

Closed

25MHz

1 & 2

Open

1 & 2

1 & 2

Open

Closed

Open

33MHz

1 & 2

Open

1 & 2

1 & 2

Open

Open

Closed

40MHz

2 & 3

Closed

2 & 3

2 & 3

Closed

Closed

Closed

50iMHz

1 & 2

Open

1 & 2

1 & 2

Open

Closed

Open

50MHz

2 & 3

Closed

2 & 3

2 & 3

Closed

Closed

Open

66iMHz

1 & 2

Open

1 & 2

1 & 2

Open

Open

Closed

Note: Pins designated should be in the closed position.

VESA SLOT ID CONFIGURATION

Type

jp26

jp27

80386 serials

Open

Closed

80486 serials

Closed

Open