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MB1433FA

UNIDENTIFIED

MB1433FA

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

254mm x 220mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Reset switch

J4

Speaker

J2

Turbo switch

J5

Turbo LED

J3

External battery

JP17

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Keyboard BIOS pin size select 23

JP3

pins 1 & 3 closed

 

Keyboard BIOS pin size select 30

JP3

pins 2 & 4 closed

Monitor type select monochrome

JP4

Open

 

Monitor type select color

JP4

Closed

Chip type select 146818

JP7

Open

 

Chip type select Dallas

JP7

Closed

CMOS memory normal operation

JP11

pins 2 & 4 closed

 

CMOS memory clear

JP11

pins 1 & 3 closed

Fuse enabled

JPE

Open

 

Fuse disabled

JPE

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

32KB

(4) 8K x 8

NONE

(1) 8K x 8

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

jp2

jp13

jp16

jp18

jp20

32KB

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

1 & 4

1 & 4

Open

Open

64KB

1 & 8, 2 & 7, 4 & 5

2 & 3

1 & 4

1 & 4

Open

128KB

1 & 8, 2 & 7, 3 & 6

1 & 4

1 & 4

1 & 4, 2 & 3

1 & 8, 2 & 7

256KB

1 & 8, 2 & 7

2 & 3

1 & 4, 2 & 3

1 & 4, 2 & 3

3 & 6, 4 & 5

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP10

80486SX

pins 3 & 10 closed

80487SX

pins 1 & 12, 2 & 11, 5 & 8 closed

80486DX

pins 1 & 12, 2 & 11, 3 & 10 closed

80486DX2

pins 1 & 12, 2 & 11, 3 & 10 closed