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