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MB-1425/1433/1440/1450UHT VER. 3 & ABOVE

BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1425/1433/1440/1450UHT VER. 3 & ABOVE

Processor

CX486M6/80486SX/CX486M7/UMC486/80486DX/80486DX2/80486DX4/ Pentium Overdrive

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

128MB

Cache

128/256/512/1024KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2), 32-bit PCI slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP8

Turbo switch

JP15 (pins 14 - 15)

Speaker

JP15 (pins 1 - 4)

+5v ground

JP15 (pins 17 - 18)

Power LED & keylock

JP15 (pins 5 - 9)

32-bit PCI slots

PC1 - PC3

Turbo LED

JP15 (pins 10 - 11)

32-bit VESA local bus slots

SL1 & SL2

Reset switch

JP15 (pins 12 - 13)

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP8

Open

 

CMOS memory clear

JP8

pins 3 & 4 closed

 

Battery type select external

JP8

Closed

Power good signal detect from power supply

JP10

pins 1 & 2 closed

 

Power good signal detect from board

JP10

pins 2 & 3 closed

Password select normal

JP16

Open

 

Password select clear

JP16

Closed

Factory configured - do not alter

JP23

Open

Factory configured - do not alter

JP24

Open

Factory configured - do not alter

JP25

Open

Factory configured - do not alter

JP30

Open

Factory configured - do not alter

JP31

Open

Factory configured - do not alter

JP32

Open

Hardware management select normal operation

JP40

Open

 

Hardware management select trigger for SMM mode

JP40

Closed

Cyrix CPU clock speed select 2x

JP43

Open

 

Cyrix CPU clock speed select 1x

JP43

Closed

CPU type select all

JP60

Open

 

CPU type select AMD 80486DX2-66/80 only

JP60

Closed

Note: The location of JP60 is unidentified.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

2MB

(4) 512K x 9

NONE

NONE

2MB

NONE

(1) 512K x 36

NONE

2MB

NONE

NONE

(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

NONE

6MB

(4) 1M x 9

(1) 512 x 36

NONE

6MB

(4) 1M x 9

NONE

(1) 512 x 36

8MB

(4) 1M x 9

(1) 512K 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

16MB

(4) 4M x 9

NONE

NONE

16MB

NONE

(1) 2M x 36

(1) 2M x 36

16MB

NONE

(1) 4M x 36

NONE

16MB

NONE

NONE

(1) 4M x 36

24MB

(4) 4M x 9

(1) 1M x 36

(1) 1M x 36

DRAM CONFIGURATION (CONT)

Size

Bank 0

Bank 1

Bank 2

24MB

(4) 4M x 9

(1) 2M x 36

NONE

24MB

(4) 4M x 9

NONE

(1) 2M x 36

32MB

(4) 4M x 9

(1) 2M x 36

(1) 2M x 36

32MB

(4) 4M x 9

(1) 4M x 36

NONE

32MB

(4) 4M x 9

NONE

(1) 4M x 36

32MB

(4) 8M x 9

NONE

NONE

32MB

NONE

(1) 4M x 36

(1) 4M x 36

32MB

NONE

(1) 8M x 36

NONE

32MB

NONE

NONE

(1) 8M x 36

64MB

(4) 16M x 9

NONE

NONE

64MB

NONE

(1) 8M x 36

(1) 8M x 36

128MB

(4) 16M x 9

(1) 8M x 36

(1) 8M x 36

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

512KB

(4) 64K x 8

(4) 64K x 8

(1) 32K x 8

1MB

(4) 128K x 8

(4) 128K x 8

(1) 64K x 8

CACHE JUMPER CONFIGURATION

Size

JP22

JP34

JP35

JP36

128KB

1 & 2

Open

1 & 2

2 & 3

256KB

1 & 2, 3 & 4

Open

2 & 3

1 & 2

512KB

1 & 2, 3 & 4, 5 & 6

3 & 4

2 & 3

1 & 2

1MB

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

1 & 2, 3 & 4

2 & 3

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP19

JP20

AMD

pins 2 & 3 closed

pins 1 & 2 closed

Cyrix

pins 1 & 2 closed

pins 2 & 3 closed

Intel

pins 1 & 2 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

Type

JP37

JP38

JP39

JP41

JP42

CX486M6

1 & 2, 3 & 4

1 & 2, 3 & 4

3 & 4

2 & 3

2 & 3

AM486

Open

2 & 3

1 & 2

1 & 2

Open

80486SX

Open

2 & 3

1 & 2

Open

Open

CX486M7

1 & 2, 3 & 4

1 & 2, 3 & 4

3 & 4

2 & 3

2 & 3

UMC486

Open

2 & 3

1 & 2

1 & 2

Open

SL80486

1 & 2, 3 & 4

1 & 2, 3 & 4

3 & 4

2 & 3

2 & 3

80486DX

Open

1 & 2, 3 & 4

1 & 2

2 & 3

Open

80486DX2

Open

1 & 2, 3 & 4

1 & 2

2 & 3

Open

80486DX4

2 & 3, 4 & 5

1 & 2, 3 & 4

3 & 4

2 & 3

1 & 2, 3 & 4

Pentium Overdrive

2 & 3, 4 & 5

1 & 2, 3 & 4

3 & 4, 5 & 6

2 & 3

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP44

JP45

JP46

JP47

CX486M6

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

AM486

Open

pins 2 & 3 closed

pins 3 & 4 closed

Open

80486SX

Open

Open

Open

Open

CX486M7

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

UMC486

Open

pins 2 & 3 closed

pins 3 & 4 closed

Open

SL80486

Open

pins 1 & 2 closed

Open

Open

80486DX

Open

Open

Open

Open

80486DX2

Open

Open

Open

Open

80486DX4

pins 3 & 4 closed

pins 1 & 2 closed

Open

Open

Pentium Overdrive

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

JP33

25MHz

pins 1 & 2 closed

33MHz

pins 1 & 2, 3 & 4, 5 & 6 closed

40MHz

pins 1 & 2, 3 & 4 closed

50iMHz

pins 1 & 2 closed

50MHz

pins 5 & 6 closed

66iMHz

pins 1 & 2, 3 & 4, 5 & 6 closed

75iMHz

pins 1 & 2 closed

100iMHz

pins 1 & 2, 3 & 4, 5 & 6 closed

CPU CLOCK CONFIGURATION

Speed

JP48

2x

pins 2 & 3 closed

2.5x

pins 1 & 2 closed

3x

Open

CPU VOLTAGE CONFIGURATION

Voltage

JP29

JP49

JP50

JP51

JP52

3.3v

Open

Open

Open

Closed

Closed

5v

pins 1 & 2, 3 & 4 closed

Closed

Closed

Open

Open

VESA WAIT STATE CONFIGURATION

Wait states

JP53

0 wait states

Open

1 wait state

Closed

BUS SPEED CONFIGURATION

CPU speed

JP54

<= 33MHz

Open

> 33MHz

Closed