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





MB-1425/1433/1440/1450UIV (REV. 1)

BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1425/1433/1440/1450UIV (REV. 1)

Processor

CX486M6/80486SX/SL80486SX/CX486DX/AM486DX/UMC U5/80486DX/ SL80486DX/CX486DX2/AM486DX2/80486DX2/SL80486DX2/AM486DX4/ 80486DX4/P24D/Pentium Overdrive

Processor Speed

25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)/120(internal)MHz

Chip Set

Unidentified

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI/Award

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (3), floppy drive interface, green PC connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

JP15 pins 1 - 4

+5v ground

JP15 pins 17 & 18

Power LED & keylock

JP15 pins 5 - 9

External battery

JP8

Turbo LED

JP15 pins 10 & 11

Green PC LED

JP24

Reset switch

JP15 pins 12 & 13

Green PC connector

JP25

Turbo switch

JP15 pins 14 & 15

32-bit VESA local bus slots

SL1 - SL3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Ľ

CMOS memory normal operation

JP8

pins 2 & 3 closed

 

CMOS memory clear

JP8

pins 3 & 4 closed

Ľ

Factory configured - do not alter

JP31

N/A

Ľ

DS12887 normal operation

JP32

Open

 

DS12887 clear

JP32

Closed

Ľ

VESA bus slot select synchronous

JP36

pins 1 & 2 closed

 

VESA bus slot select asynchronous

JP36

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

NONE

NONE

1MB

NONE

(1) 256K x 36

NONE

1MB

NONE

NONE

(1) 256K x 36

2MB

(4) 256K x 9

(1) 256K x 36

NONE

2MB

(4) 256K x 9

NONE

(1) 256K x 36

2MB

NONE

(1) 256K x 36

(1) 256K x 36

2MB

NONE

(1) 512K x 36

NONE

2MB

NONE

NONE

(1) 512K x 36

3MB

(4) 256K x 9

(1) 256K x 36

(1) 256K x 36

3MB

(4) 256K x 9

NONE

(1) 512K x 36

3MB

NONE

(1) 256K x 36

(1) 512K x 36

3MB

NONE

(1) 512K x 36

(1) 256K x 36

4MB

(4) 256K x 9

(1) 256K x 36

(1) 512K x 36

4MB

(4) 1M x 9

NONE

NONE

4MB

NONE

(1) 512K x 36

(1) 512K x 36

4MB

NONE

(1) 1M x 36

NONE

4MB

NONE

NONE

(1) 1M x 36

5MB

(4) 256K x 9

(1) 1M x 36

NONE

5MB

(4) 256K x 9

NONE

(1) 1M x 36

5MB

(4) 1M x 9

(1) 256K x 36

NONE

5MB

(4) 1M x 9

NONE

(1) 256K x 36

5MB

NONE

(1) 256K x 36

(1) 1M x 36

5MB

NONE

(1) 1M x 36

(1) 256K x 36

6MB

(4) 1M x 9

NONE

(1) 512K x 36

6MB

NONE

(1) 1M x 36

(1) 512K x 36

6MB

NONE

(1) 512K x 36

(1) 1M x 36

7MB

(4) 256K x 9

(1) 1M x 36

(1) 512K x 36

7MB

(4) 1M x 9

(1) 256K x 36

(1) 512K x 36

8MB

(4) 1M x 9

(1) 1M x 36

NONE

8MB

(4) 1M x 9

NONE

(1) 1M x 36

8MB

NONE

(1) 1M x 36

(1) 1M x 36

8MB

NONE

(1) 2M x 36

NONE

8MB

NONE

NONE

(1) 2M x 36

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

9MB

(4) 256K x 9

(1) 1M x 36

(1) 1M x 36

9MB

(4) 1M x 9

(1) 1M x 36

(1) 256K x 36

9MB

(4) 1M x 9

(1) 256K x 36

(1) 1M x 36

10MB

(4) 1M x 9

(1) 1M x 36

(1) 512K x 36

12MB

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

12MB

(4) 1M x 9

NONE

(1) 2M x 36

12MB

NONE

(1) 1M x 36

(1) 2M x 36

12MB

NONE

(1) 2M x 36

(1) 1M x 36

16MB

(4) 4M x 9

NONE

NONE

16MB

NONE

(1) 4M x 36

NONE

16MB

NONE

NONE

(1) 4M x 36

17MB

(4) 256K x 9

(1) 4M x 36

NONE

17MB

(4) 256K x 9

NONE

(1) 4M x 36

17MB

(4) 4M x 9

(1) 256K x 36

NONE

17MB

(4) 4M x 9

NONE

(1) 256K x 36

18MB

(4) 256K x 9

(1) 256K x 36

(1) 4M x 36

18MB

(4) 256K x 9

(1) 4M x 36

(1) 256K x 36

19MB

(4) 256K x 9

(1) 4M x 36

(1) 512K x 36

20MB

(4) 1M x 9

(1) 4M x 36

NONE

20MB

(4) 1M x 9

NONE

(1) 4M x 36

20MB

(4) 4M x 9

(1) 1M x 36

NONE

20MB

(4) 4M x 9

NONE

(1) 1M x 36

21MB

(4) 256K x 9

(1) 1M x 36

(1) 4M x 36

21MB

(4) 256K x 9

(1) 4M x 36

(1) 1M x 36

24MB

(4) 1M x 9

(1) 1M x 36

(1) 4M x 36

24MB

(4) 1M x 9

(1) 4M x 36

(1) 1M x 36

32MB

(4) 4M x 9

(1) 4M x 36

NONE

32MB

(4) 4M x 9

NONE

(1) 4M x 36

32MB

NONE

(1) 4M x 36

(1) 4M x 36

32MB

NONE

NONE

(1) 8M x 36

33MB

(4) 256K x 9

NONE

(1) 8M x 36

33MB

(4) 256K x 9

(1) 4M x 36

(1) 4M x 36

33MB

(4) 4M x 9

(1) 4M x 36

(1) 256K x 36

33MB

(4) 4M x 9

(1) 256K x 36

(1) 4M x 36

34MB

(4) 4M x 9

(1) 4M x 36

(1) 512K x 36

36MB

(4) 4M x 9

(1) 4M x 36

(1) 1M x 36

36MB

(4) 4M x 9

(1) 1M x 36

(1) 4M x 36

36MB

(4) 1M x 9

NONE

(1) 8M x 36

36MB

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

NONE

(1) 8M x 36

48MB

NONE

(1) 4M x 36

(1) 8M x 36

48MB

NONE

(1) 8M x 36

(1) 4M x 36

64MB

NONE

(1) 8M x 36

(1) 8M x 36

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 (A)

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

256KB (B)

(4) 64K x 8

NONE

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP7

JP9

JP10

JP33

64KB

Open

Open

pins 2 & 3 closed

Open

128KB

Open

pins 1 & 2 closed

pins 1 & 2 closed

Closed

256KB (A)

Closed

pins 2 & 3 closed

pins 2 & 3 closed

Closed

256KB (B)

Closed

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

Closed

CPU TYPE CONFIGURATION

Type

JP11

JP12

JP13

JP17

JP18

CX486SX

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

2 & 3

Open

2 & 3, 4 & 5

80486SX

Open

2 & 3

2 & 3

Open

Open

SL80486SX

1 & 2

2 & 3

2 & 3

1 & 2

5 & 6

CX486DX

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4

1 & 2

2 & 3, 4 & 5

AM486DX

Open

2 & 3

1 & 2, 3 & 4

2 & 3

Open

80486DX

Open

2 & 3

1 & 2, 3 & 4

1 & 2

Open

SL80486DX

1 & 2, 4 & 5

1 & 2, 4 & 5

1 & 2, 3 & 4

1 & 2

3 & 4, 5 & 6

UMC U5S

2 & 3

2 & 3

2 & 3

3 & 4

1 & 2

CX486DX2

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4

1 & 2

2 & 3, 4 & 5

AM486DX2

Open

2 & 3

1 & 2, 3 & 4

2 & 3

Open

SLAM486DX2

1 & 2

1 & 2, 4 & 5

1 & 2, 3 & 4

1 & 2

3 & 4, 5 & 6

80486DX2

Open

2 & 3

1 & 2, 3 & 4

1 & 2

Open

SL80486DX2

1 & 2, 4 & 5

1 & 2, 4 & 5

1 & 2, 3 & 4

1 & 2

3 & 4, 5 & 6

CX486DX4

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4, 5 & 6

1 & 2, 3 & 4

1 & 2

2 & 3, 4 & 5

AM486DX4

Open

2 & 3

1 & 2, 3 & 4

2 & 3

Open

SLAM486DX4

1 & 2

1 & 2, 4 & 5

1 & 2, 3 & 4

1 & 2

3 & 4, 5 & 6

80486DX4

1 & 2, 4 & 5

1 & 2, 4 & 5

1 & 2, 3 & 4

1 & 2

3 & 4, 5 & 6

P24D

1 & 2, 4 & 5

1 & 2, 4 & 5

1 & 2, 3 & 4

1 & 2

3 & 4, 5 & 6

P24T

1 & 2

1 & 2

1 & 2, 3 & 4

2 & 3

5 & 6

Note: Pins designated should be in the closed position. All jumpers may not be present on all revisions.

CPU TYPE CONFIGURATION (CONíT)

Type

JP19

JP20

JP23

JP35

JP40

CX486SX

2 & 3, 4 & 5

Open

Open

Open

Open

80486SX

Open

Open

Open

Closed

Open

SL80486SX

1 & 2, 3 & 4

Open

Open

Closed

Open

CX486DX

2 & 3

Open

Open

Open

Open

AM486DX

Open

1 & 2

Open

Closed

Open

80486DX

Open

Open

Open

Closed

Open

SL80486DX

1 & 2, 3 & 4

Open

Open

Open

Open

UMC U5S

Open

Open

Open

Closed

Open

CX486DX2

2 & 3

Open

Open

Open

Open

AM486DX2

Open

1 & 2

Open

Closed

Open

SL AM486DX2

1 & 2, 3 & 4

Open

Open

Open

Closed

80486DX2

Open

Open

Open

Closed

Open

SL80486DX2

1 & 2, 3 & 4

Open

Open

Open

Open

CX486DX4

2 & 3

Open

Open

Open

Open

AM486DX4

Open

1 & 2

Open

Closed

Open

SL AM486DX4

1 & 2, 3 & 4

Open

Open

Open

Closed

80486DX4

1 & 2, 3 & 4

Open

Open

Open

Open

P24D

1 & 2, 3 & 4

Open

Open

Open

Open

P24T

1 & 2, 3 & 4

Open

Open

Open

Open

Note: Pins designated should be in the closed position. All jumpers may not be present on all revisions.

CPU SPEED CONFIGURATION

Speed

JP4

JP5

JP6

25MHz

Open

Open

Closed

33MHz

Closed

Closed

Closed

40MHz

Open

Closed

Closed

50iMHz

Open

Open

Closed

50MHz

Closed

Open

Open

66iMHz

Closed

Closed

Closed

75iMHz

Open

Open

Closed

80iMHz

Open

Closed

Closed

100iMHz

Closed

Closed

Closed

CPU VOLTAGE CONFIGURATION

Voltage

JP14

JP16

JP27

JP38

JP39

3.3v - 3.6v

1 & 2

1 & 2

1 & 2

1 & 2

Open

4v

1 & 2

1 & 2

1 & 2

2 & 3

Closed

5v

2 & 3

2 & 3

2 & 3

1 & 2

Open

Note: Pins designated should be in the closed position.

VESA WAIT STATE CONFIGURATION

Wait states

JP22

0 wait states

Open

1 wait state

Closed

BUS SPEED CONFIGURATION

CPU speed

JP21

<= 33MHz

Open

> 33MHz

Closed