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





MB-8425UUD-A, MB-8433UUD-A, MB-8440UUD-A (VER. 1 & 2, ALL MODELS)

BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-8425UUD-A, MB-8433UUD-A, MB-8440UUD-A (VER. 1 & 2, ALL MODELS)

Processor

UMCU5S/CX486DX/AM486DX/(SL)AM486DX(SV8B)/(SL)AM486DX(SV8T)/80486DX/CX486DX2/AM486DX2/9SL)AM486DX2(SV8B)/ (SL)AM486DX2(SV8T)/80486DX2/CX486DX4/(SL)CX486DX4/AM486DX4/(SL)AM486DX4(SV8B)/(SL)AM486DX4(SV8T)/80486DX4/P24D/P24T/ CX5X86/AM5X86

Processor Speed

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

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

128MB

Maximum Video Memory

None

Cache

128/256/512KB

BIOS

Award

Dimensions

220mm x 220mm

I/O Options

32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

CN1

Green PC LED

JP1 pins 14 & 15

Serial port 2

CN2

Reset switch

JP1 pins12 & 13

Parallel port

CN3

Green PC connector

JP1 pins 17 & 18

Floppy drive interface

CN4

IDE interface LED

JP1 pins 20 & 21

IDE interface 1

CN5

Turbo switch

JP1 pins 23 & 24

IDE interface 2

CN6

+12v ground

JP1 pins 25 & 26

PS/2 mouse port

CN7

External battery

JP42

Speaker

JP1 pins 1- 4

PS/2 mouse interface

JP47

Power LED & keylock

JP1 pins 5 - 9

32-bit PCI slots

PC1 - PC3

Turbo LED

JP1 pins 10 & 11

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

Ľ

Dallas DS12887A normal operation

JP12

Pins 3 & 4 open

 

Dallas DS12887A clear

JP12

Pins 3 & 4 closed

 

Flash BIOS voltage select 12v

JP13

Pins 2 & 3 closed

 

Flash BIOS voltage select 5v

JP13

Pins 1 & 2 closed

 

EPROM BIOS used

JP13

Open

Ľ

CMOS memory normal operation

JP42

Pins 2 & 3 closed

 

CMOS memory clear

JP42

Pins 3 & 4 closed

 

Battery type select external

JP42

Closed

Note: JP12 is only present if the Dallas DS12887A(BQ3287A)/OEC12C887A clock is installed.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

None

None

None

2MB

(1) 512K x 36

None

None

None

2MB

(1) 256K x 36

(1) 256K x 36

None

None

3MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

None

4MB

(1) 1M x 36

None

None

None

4MB

(1) 512K x 36

(1) 256K x 36

(1) 256K x 36

None

4MB

(1) 512K x 36

(1) 512K x 36

None

None

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

5MB

(1) 1M x 36

(1) 256K x 36

None

None

5MB

(1) 512K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

5MB

(1) 256K x 36

(1) 512K x 36

(1) 512K x 36

None

5MB

(1) 256K x 36

(1) 1M x 36

None

None

6MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

None

6MB

(1) 1M x 36

(1) 512K x 36

None

None

7MB

(1) 256K x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

8MB

(1) 2M x 36

None

None

None

8MB

(1) 1M x 36

(1) 512K x 36

(1) 512K x 36

None

8MB

(1) 1M x 36

(1) 1M x 36

None

None

9MB

(1) 256K x 36

(1) 2M x 36

None

None

10MB

(1) 2M x 36

(1) 256K x 36

(1) 256K x 36

None

10MB

(1) 2M x 36

(1) 512K x 36

None

None

10MB

(1) 1M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

11MB

(1) 2M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

12MB

(1) 2M x 36

(1) 512K x 36

(1) 512K x 36

None

12MB

(1) 2M x 36

(1) 1M x 36

None

None

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

None

12MB

(1) 1M x 36

(1) 2M x 36

None

None

13MB

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

14MB

(1) 2M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

16MB

(1) 4M x 36

None

None

None

16MB

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

None

16MB

(1) 2M x 36

(1) 2M x 36

None

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

17MB

(1) 4M x 36

(1) 256K x 36

None

None

17MB

(1) 256K x 36

(1) 2M x 36

(1) 2M x 36

None

17MB

(1) 256K x 36

(1) 4M x 36

None

None

18MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

None

18MB

(1) 4M x 36

(1) 512K x 36

None

None

20MB

(1) 4M x 36

(1) 1M x 36

None

None

20MB

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

20MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

None

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

None

24MB

(1) 2M x 36

(1) 4M x 36

None

None

25MB

(1) 256K x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

26MB

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

28MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

28MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 8M x 36

None

None

None

32MB

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

None

32MB

(1) 4M x 36

(1) 4M x 36

None

None

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

33MB

(1) 8M x 36

(1) 256K x 36

None

None

33MB

(1) 256K x 36

(1) 8M x 36

None

None

34MB

(1) 8M x 36

(1) 256K x 36

(1) 256K x 36

None

34MB

(1) 8M x 36

(1) 512K x 36

None

None

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

34MB

(1) 512K x 36

(1) 4M x 36

(1) 4M x 36

None

34MB

(1) 512K x 36

(1) 8M x 36

None

None

35MB

(1) 8M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

36MB

(1) 8M x 36

(1) 512K x 36

(1) 512K x 36

None

36MB

(1) 8M x 36

(1) 1M x 36

None

None

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

None

38MB

(1) 8M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

40MB

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

None

40MB

(1) 8M x 36

(1) 2M x 36

None

None

40MB

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

40MB

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

None

40MB

(1) 2M x 36

(1) 8M x 36

None

None

48MB

(1) 8M x 36

(1) 4M x 36

None

None

48MB

(1) 4M x 36

(1) 8M x 36

None

None

49MB

(1) 256K x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

50MB

(1) 512K x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

52MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

56MB

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

56MB

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

None

64MB

(1) 8M x 36

(1) 8M x 36

None

None

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

65MB

(1) 256K x 36

(1) 8M x 36

(1) 8M x 36

None

66MB

(1) 512K x 36

(1) 8M x 36

(1) 8M x 36

None

68MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

None

72MB

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

None

80MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

None

97MB

(1) 256K x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

98MB

(1) 512K x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

100MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

104MB

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

112MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

Note: Not all configurations are shown. Any SIMM can be installed in any bank.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

None

(1) 8K x 8

256KB (A)

(4) 64K x 8

None

(1) 32K x 8

256KB (B)

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

512KB

(4) 128K x 8

None

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP5

JP6

JP7

128KB

Pins 1 & 2 closed

Open

Open

256KB (A)

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

256KB (B)

Pins 2 & 3 closed

Pins 1 & 2 closed

Open

512KB

Pins 1 & 2 closed

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2, 3 & 4 closed

CPU SPEED SELECTION

Speed

JP15

JP16

JP17

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

100iMHz

Closed

Closed

Closed

Note: JP17 may not be present on all boards.

CPU TYPE SELECTION

Type

JP10

JP11

JP31

JP45

JP46

UMC U5S

1 & 2

2 & 3

Open

2 & 3

Open

CX486DX

2 & 3

1 & 2

Open

1 & 2

1 & 2, 4 & 5

AM486DX

1 & 2

1 & 2

Open

2 & 3

1 & 2, 4 & 5

(SL)AM486DX(SV8B)

1 & 2

1 & 2

Open

1 & 2

1 & 2, 4 & 5

(SL)AM486DX(SV8T)

1 & 2

1 & 2

Open

1 & 2

1 & 2, 4 & 5

80486DX

1 & 2

1 & 2

Open

2 & 3

1 & 2, 4 & 5

CX486DX2

2 & 3

1 & 2

Open

1 & 2

1 & 2, 4 & 5

AM486DX2

1 & 2

1 & 2

Open

2 & 3, 5 & 6

1 & 2, 4 & 5

(SL)AM486DX2(SV8B)

1 & 2

1 & 2

Open

1 & 2, 4 & 5

1 & 2, 4 & 5

(SL)AM486DX2(SV8T)

1 & 2

1 & 2

Open

1 & 2, 4 & 5

1 & 2, 4 & 5

80486DX2

1 & 2

1 & 2

Open

2 & 3

1 & 2, 4 & 5

CX486DX4

2 & 3

1 & 2

Open

1 & 2

1 & 2, 4 & 5

(SL)CX486DX4

2 & 3

1 & 2

Closed

1 & 2

1 & 2, 4 & 5

AM486DX4

1 & 2

1 & 2

Open

2 & 3

1 & 2, 4 & 5

(SL)AM486DX4(SV8B)

1 & 2

1 & 2

Open

1 & 2

1 & 2, 4 & 5

(SL)AM486DX4(SV8T)

1 & 2

1 & 2

Open

1 & 2

1 & 2, 4 & 5

80486DX4

1 & 2

1 & 2

Open

1 & 2

1 & 2, 4 & 5

P24D

1 & 2

1 & 2

Open

1 & 2

1 & 2, 4 & 5

P24T

1 & 2

1 & 2

Open

1 & 2

2 & 3, 4 & 5

CX5X86

1 & 2

1 & 2

Open

1 & 2

1 & 2, 4 & 5

AM5X86-P75

1 & 2

1 & 2

Open

1 & 2, 4 & 5

1 & 2, 4 & 5

AM5X86-P75+

1 & 2

1 & 2

Open

1 & 2

1 & 2, 4 & 5

AM5X86-P90

1 & 2

1 & 2

Open

1 & 2, 4 & 5

1 & 2, 4 & 5

Note: Pins designated should be in the closed position. Ver. 2 does not support the UMC U5S.

CPU TYPE SELECTION (CONíT)

Type

RN11

RN12

RN13

RN14

RN15

UMC U5S

Installed

Not installed

Not installed

Not installed

Not installed

CX486DX

Not installed

Installed

Installed

Not installed

Not installed

AM486DX

Not installed

Not installed

Not installed

Installed

Installed

(SL)AM486DX(SV8B)

Not installed

Not installed

Not installed

Installed

Installed

(SL)AM486DX(SV8T)

Not installed

Not installed

Not installed

Installed

Installed

80486DX

Not installed

Not installed

Not installed

Installed

Installed

CX486DX2

Not installed

Installed

Installed

Not installed

Not installed

AM486DX2

Not installed

Not installed

Not installed

Installed

Installed

(SL)AM486DX2(SV8B)

Not installed

Not installed

Not installed

Installed

Installed

(SL)AM486DX2(SV8T)

Not installed

Not installed

Not installed

Installed

Installed

80486DX2

Not installed

Not installed

Not installed

Installed

Installed

CX486DX4

Not installed

Installed

Installed

Not installed

Not installed

(SL)CX486DX4

Not installed

Not installed

Not installed

Installed

Installed

AM486DX4

Not installed

Not installed

Not installed

Installed

Installed

(SL)AM486DX4(SV8B)

Not installed

Not installed

Not installed

Installed

Installed

(SL)AM486DX4(SV8T)

Not installed

Not installed

Not installed

Installed

Installed

80486DX4

Not installed

Not installed

Not installed

Installed

Installed

P24D

Not installed

Not installed

Not installed

Installed

Installed

P24T

Not installed

Not installed

Not installed

Installed

Installed

CX5X86

Not installed

Not installed

Not installed

Installed

Installed

AM5X86-P75

Not installed

Not installed

Not installed

Installed

Installed

AM5X86-P75+

Not installed

Not installed

Not installed

Installed

Installed

AM5X86-P90

Not installed

Not installed

Not installed

Installed

Installed

Note: RN11 is not present on Ver. 2 Ver. 2 does not support the UMC U5S.

CPU VOLTAGE SELECTION

Voltage

JP36

JP37

JP39

3.45v

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

4v

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

5v

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

DMA CHANNEL SELECTION

Channel

JP8

JP9

1

Pins 1 & 2 closed

Pins 1 & 2 closed

3

Pins 2 & 3 closed

Pins 2 & 3 closed