MB-8425/33/40/50UUC

BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-8425/33/40/50UUC

Processor

CXM1/80486SX/UMCU5/CX486M6/AM486DX/80486DX/SL80486DX/CX487M7AM486DX2/SL AM486DX2/80486DX2/SL80486DX2/AM486DX4/SL AM486DX4 SL80486DX4/P24D/Pentium Overdrive

Processor Speed

20/25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)MHz

Chip Set

Unidentified

Max. Onboard DRAM

128MB

Cache

128/256KB

BIOS

Award

Dimensions

260mm x 220mm

I/O Options

Parallel port, serial ports (2), game port, 32-bit PCI slots (3), green PC connector, floppy drive interface, IDE interfaces (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

CN1

IDE interface LED

D9

IDE interface 1

CN2

Green PC connector

JP13

Parallel port

CN3

Speaker

JP15 pins 1 - 4

Game port

CN4

Power LED & keylock

JP15 pins 5 - 9

Floppy drive interface

CN5

Turbo LED

JP15 pins 10 - 11

Serial port 1

CN6

Reset switch

JP15 pins 12 - 13

Serial port 2

CN7

Turbo switch

JP15 pins 14 - 16

IDE interface 2

CN8

+5v ground

JP15 pins 17 - 18

+5v ground

D8

32-bit PCI slots

PC1 - PC3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

»

BIOS type select 12v flash

JP3

pins 1 & 2 closed

BIOS type select 5v flash

JP3

pins 2 & 3 closed

BIOS type select EPROM

JP3

Open

»

CMOS memory normal operation

JP6

pins 1 & 2 closed

CMOS memory clear

JP6

pins 1 & 2, 3 & 4 closed

»

Factory configured - do not alter

JP9

N/A

»

Factory configured - do not alter

JP10

N/A

»

Factory configured - do not alter

JP11

N/A

»

Factory configured - do not alter

JP12

N/A

»

Factory configured - do not alter

JP20

N/A

»

Factory configured - do not alter

JP21

N/A

»

Factory configured - do not alter

JP46

N/A

»

Factory configured - do not alter

JP49

N/A

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

2MB

(1) 256K x 36

(1) 256K x 36

NONE

NONE

2MB

(1) 512K x 36

NONE

NONE

NONE

3MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

NONE

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

4MB

(1) 512K x 36

(1) 512K x 36

NONE

NONE

4MB

(1) 1M x 36

NONE

NONE

NONE

6MB

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

NONE

8MB

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

8MB

(1) 2M x 36

NONE

NONE

NONE

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 2M x 36

(1) 2M x 36

NONE

NONE

16MB

(1) 4M x 36

NONE

NONE

NONE

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

NONE

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

32MB

(1) 8M x 36

NONE

NONE

NONE

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 8M x 36

(1) 8M x 36

NONE

NONE

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

NONE

128MB

(1) 8M x 36

(1) 8M x 36

(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 (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

JP24

JP25

JP26

128KB

Open

pins 1 & 2 closed

Open

256KB (A)

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

256KB (B)

pins 1 & 2 closed

pins 2 & 3 closed

Open

CPU TYPE CONFIGURATION

Type

JP27

JP28

JP29

JP30

JP31

CX M1

Closed

Open

Closed

3 & 4

Closed

80486SX

Open

Closed

Closed

Open

Closed

UMC-U5

Open

Open

Open

1 & 2

Open

CX486M6

Open

Open

Open

Open

Open

AM486DX

Open

Closed

Closed

3 & 4

Closed

80486DX

Open

Closed

Closed

3 & 4

Closed

SL80486DX

Open

Closed

Closed

3 & 4

Closed

CX486M7

Open

Open

Open

3 & 4

Open

AM486DX2

Open

Closed

Closed

3 & 4

Closed

SL AM486DX2 WT

Open

Closed

Closed

3 & 4

Closed

SL AM486DX2 WB

Open

Closed

Closed

3 & 4

Closed

80486DX2

Open

Closed

Closed

3 & 4

Closed

SL80486DX2

Open

Closed

Closed

3 & 4

Closed

AM486DX4

Open

Closed

Closed

3 & 4

Closed

SL AM486DX4 WT

Open

Closed

Closed

3 & 4

Closed

SL AM486DX4 WB

Open

Closed

Closed

3 & 4

Closed

SL80486DX4

Open

Closed

Closed

3 & 4

Closed

P24D

Open

Closed

Closed

3 & 4

Closed

Pentium Overdrive

Open

Open

Open

2 & 3

Open

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP32

JP33

JP34

JP35

JP36

CX M1

2 & 3, 4 & 5

Open

Open

Open

1 & 2

80486SX

2 & 3, 4 & 5

Open

Open

Open

1 & 2

UMC-U5

Open

Open

Open

Open

Open

CX486M6

1 & 2, 3 & 4

Open

1 & 2

2 & 3

2 & 3

AM486DX

2 & 3, 4 & 5

Open

Open

Open

1 & 2

80486DX

2 & 3, 4 & 5

Open

Open

Open

1 & 2

SL80486DX

2 & 3, 4 & 5

Open

Open

Open

1 & 2

CX486M7

1 & 2, 3 & 4

Open

1 & 2

2 & 3

2 & 3

AM486DX2

2 & 3, 4 & 5

Open

Open

Open

1 & 2

SL AM486DX2 WT

2 & 3, 4 & 5

2 & 3

Open

Open

1 & 2

SL AM486DX2 WB

2 & 3, 4 & 5

2 & 3

Open

Open

1 & 2

80486DX2

2 & 3, 4 & 5

Open

Open

Open

1 & 2

SL80486DX2

2 & 3, 4 & 5

Open

Open

Open

1 & 2

AM486DX4

2 & 3, 4 & 5

Open

Open

Open

1 & 2

SL AM486DX4 WT

2 & 3, 4 & 5

Open

Open

Open

1 & 2

SL AM486DX4 WB

2 & 3, 4 & 5

Open

Open

Open

1 & 2

SL80486DX4

2 & 3, 4 & 5

Open

Open

Open

1 & 2

P24D

2 & 3, 4 & 5

Open

Open

Open

1 & 2

Pentium Overdrive

2 & 3, 4 & 5

Open

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)

Type

JP37

JP38

JP39

JP40

JP41

JP42

CX M1

Open

2 & 3

1 & 2

3 & 4

Open

1 & 2, 3 & 4

80486SX

2 & 3

2 & 3

1 & 2

1 & 2

Open

2 & 3

UMC-U5

2 & 3

2 & 3

2 & 3

1 & 2

3 & 4

2 & 3

CX486M6

2 & 3

1 & 2

1 & 2

3 & 4

1 & 2

2 & 3

AM486DX

2 & 3

2 & 3

1 & 2

1 & 2

Open

1 & 2, 3 & 4

80486DX

2 & 3

2 & 3

1 & 2

1 & 2

Open

1 & 2, 3 & 4

SL80486DX

2 & 3

2 & 3

1 & 2

3 & 4

Open

1 & 2, 3 & 4

CX486M7

2 & 3

2 & 3

1 & 2

3 & 4

2 & 3

1 & 2, 3 & 4

AM486DX2

2 & 3

2 & 3

1 & 2

1 & 2

Open

1 & 2, 3 & 4

SL AM486DX2 WT

2 & 3

1 & 2

1 & 2

3 & 4

Open

1 & 2, 3 & 4

SL AM486DX2 WB

2 & 3

2 & 3

1 & 2

3 & 4

Open

1 & 2, 3 & 4

80486DX2

2 & 3

2 & 3

1 & 2

1 & 2

Open

1 & 2, 3 & 4

SL80486DX2

2 & 3

2 & 3

1 & 2

3 & 4

Open

1 & 2, 3 & 4

AM486DX4

2 & 3

2 & 3

1 & 2

1 & 2

Open

1 & 2, 3 & 4

SL AM486DX4 WT

2 & 3

1 & 2

1 & 2

3 & 4

Open

1 & 2, 3 & 4

SL AM486DX4 WB

2 & 3

2 & 3

1 & 2

3 & 4

Open

1 & 2, 3 & 4

SL80486DX4

2 & 3

2 & 3

1 & 2

3 & 4

Open

1 & 2, 3 & 4

P24D

2 & 3

2 & 3

1 & 2

3 & 4

Open

1 & 2, 3 & 4

Pentium Overdrive

2 & 3

2 & 3

1 & 2

3 & 4, 5 & 6

1 & 2

1 & 2, 3 & 4

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP22

JP23

Cyrix

pins 2 & 3 closed

pins 1 & 2 closed

AMD

pins 1 & 2 closed

pins 1 & 2 closed

UMC

pins 1 & 2 closed

pins 2 & 3 closed

Intel

pins 1 & 2 closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

JP5

JP7

JP8

20MHz

Open

Open

Open

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

JP18

JP19

3.3v

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

4v

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

5v

Open

pins 2 & 3 closed

pins 2 & 3 closed

DMA CONFIGURATION

DMA

JP47

JP48

DMA 1

pins 1 & 2 closed

pins 1 & 2 closed

DMA 3

pins 2 & 3 closed

pins 2 & 3 closed

Processor	CXM1/80486SX/UMCU5/CX486M6/AM486DX/80486DX/SL80486DX/CX487M7AM486DX2/SL AM486DX2/80486DX2/SL80486DX2/AM486DX4/SL AM486DX4 SL80486DX4/P24D/Pentium Overdrive
Processor Speed	20/25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)MHz
Chip Set	Unidentified
Max. Onboard DRAM	128MB
Cache	128/256KB
BIOS	Award
Dimensions	260mm x 220mm
I/O Options	Parallel port, serial ports (2), game port, 32-bit PCI slots (3), green PC connector, floppy drive interface, IDE interfaces (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	CN1	IDE interface LED	D9
IDE interface 1	CN2	Green PC connector	JP13
Parallel port	CN3	Speaker	JP15 pins 1 - 4
Game port	CN4	Power LED & keylock	JP15 pins 5 - 9
Floppy drive interface	CN5	Turbo LED	JP15 pins 10 - 11
Serial port 1	CN6	Reset switch	JP15 pins 12 - 13
Serial port 2	CN7	Turbo switch	JP15 pins 14 - 16
IDE interface 2	CN8	+5v ground	JP15 pins 17 - 18
+5v ground	D8	32-bit PCI slots	PC1 - PC3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	BIOS type select 12v flash	JP3	pins 1 & 2 closed
	BIOS type select 5v flash	JP3	pins 2 & 3 closed
	BIOS type select EPROM	JP3	Open
»	CMOS memory normal operation	JP6	pins 1 & 2 closed
	CMOS memory clear	JP6	pins 1 & 2, 3 & 4 closed
»	Factory configured - do not alter	JP9	N/A
»	Factory configured - do not alter	JP10	N/A
»	Factory configured - do not alter	JP11	N/A
»	Factory configured - do not alter	JP12	N/A
»	Factory configured - do not alter	JP20	N/A
»	Factory configured - do not alter	JP21	N/A
»	Factory configured - do not alter	JP46	N/A
»	Factory configured - do not alter	JP49	N/A

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
2MB	(1) 256K x 36	(1) 256K x 36	NONE	NONE
2MB	(1) 512K x 36	NONE	NONE	NONE
3MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	NONE
4MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
4MB	(1) 512K x 36	(1) 512K x 36	NONE	NONE
4MB	(1) 1M x 36	NONE	NONE	NONE
6MB	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36	NONE
8MB	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36	(1) 512K x 36
8MB	(1) 1M x 36	(1) 1M x 36	NONE	NONE
8MB	(1) 2M x 36	NONE	NONE	NONE
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	NONE
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 2M x 36	(1) 2M x 36	NONE	NONE
16MB	(1) 4M x 36	NONE	NONE	NONE
24MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	NONE

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
32MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
32MB	(1) 4M x 36	(1) 4M x 36	NONE	NONE
32MB	(1) 8M x 36	NONE	NONE	NONE
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	NONE
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
64MB	(1) 8M x 36	(1) 8M x 36	NONE	NONE
96MB	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36	NONE
128MB	(1) 8M x 36	(1) 8M x 36	(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 (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	JP24	JP25	JP26
128KB	Open	pins 1 & 2 closed	Open
256KB (A)	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
256KB (B)	pins 1 & 2 closed	pins 2 & 3 closed	Open

CPU TYPE CONFIGURATION
Type	JP27	JP28	JP29	JP30	JP31
CX M1	Closed	Open	Closed	3 & 4	Closed
80486SX	Open	Closed	Closed	Open	Closed
UMC-U5	Open	Open	Open	1 & 2	Open
CX486M6	Open	Open	Open	Open	Open
AM486DX	Open	Closed	Closed	3 & 4	Closed
80486DX	Open	Closed	Closed	3 & 4	Closed
SL80486DX	Open	Closed	Closed	3 & 4	Closed
CX486M7	Open	Open	Open	3 & 4	Open
AM486DX2	Open	Closed	Closed	3 & 4	Closed
SL AM486DX2 WT	Open	Closed	Closed	3 & 4	Closed
SL AM486DX2 WB	Open	Closed	Closed	3 & 4	Closed
80486DX2	Open	Closed	Closed	3 & 4	Closed
SL80486DX2	Open	Closed	Closed	3 & 4	Closed
AM486DX4	Open	Closed	Closed	3 & 4	Closed
SL AM486DX4 WT	Open	Closed	Closed	3 & 4	Closed
SL AM486DX4 WB	Open	Closed	Closed	3 & 4	Closed
SL80486DX4	Open	Closed	Closed	3 & 4	Closed
P24D	Open	Closed	Closed	3 & 4	Closed
Pentium Overdrive	Open	Open	Open	2 & 3	Open
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP32	JP33	JP34	JP35	JP36
CX M1	2 & 3, 4 & 5	Open	Open	Open	1 & 2
80486SX	2 & 3, 4 & 5	Open	Open	Open	1 & 2
UMC-U5	Open	Open	Open	Open	Open
CX486M6	1 & 2, 3 & 4	Open	1 & 2	2 & 3	2 & 3
AM486DX	2 & 3, 4 & 5	Open	Open	Open	1 & 2
80486DX	2 & 3, 4 & 5	Open	Open	Open	1 & 2
SL80486DX	2 & 3, 4 & 5	Open	Open	Open	1 & 2
CX486M7	1 & 2, 3 & 4	Open	1 & 2	2 & 3	2 & 3
AM486DX2	2 & 3, 4 & 5	Open	Open	Open	1 & 2
SL AM486DX2 WT	2 & 3, 4 & 5	2 & 3	Open	Open	1 & 2
SL AM486DX2 WB	2 & 3, 4 & 5	2 & 3	Open	Open	1 & 2
80486DX2	2 & 3, 4 & 5	Open	Open	Open	1 & 2
SL80486DX2	2 & 3, 4 & 5	Open	Open	Open	1 & 2
AM486DX4	2 & 3, 4 & 5	Open	Open	Open	1 & 2
SL AM486DX4 WT	2 & 3, 4 & 5	Open	Open	Open	1 & 2
SL AM486DX4 WB	2 & 3, 4 & 5	Open	Open	Open	1 & 2
SL80486DX4	2 & 3, 4 & 5	Open	Open	Open	1 & 2
P24D	2 & 3, 4 & 5	Open	Open	Open	1 & 2
Pentium Overdrive	2 & 3, 4 & 5	Open	2 & 3	1 & 2	1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP37	JP38	JP39	JP40	JP41	JP42
CX M1	Open	2 & 3	1 & 2	3 & 4	Open	1 & 2, 3 & 4
80486SX	2 & 3	2 & 3	1 & 2	1 & 2	Open	2 & 3
UMC-U5	2 & 3	2 & 3	2 & 3	1 & 2	3 & 4	2 & 3
CX486M6	2 & 3	1 & 2	1 & 2	3 & 4	1 & 2	2 & 3
AM486DX	2 & 3	2 & 3	1 & 2	1 & 2	Open	1 & 2, 3 & 4
80486DX	2 & 3	2 & 3	1 & 2	1 & 2	Open	1 & 2, 3 & 4
SL80486DX	2 & 3	2 & 3	1 & 2	3 & 4	Open	1 & 2, 3 & 4
CX486M7	2 & 3	2 & 3	1 & 2	3 & 4	2 & 3	1 & 2, 3 & 4
AM486DX2	2 & 3	2 & 3	1 & 2	1 & 2	Open	1 & 2, 3 & 4
SL AM486DX2 WT	2 & 3	1 & 2	1 & 2	3 & 4	Open	1 & 2, 3 & 4
SL AM486DX2 WB	2 & 3	2 & 3	1 & 2	3 & 4	Open	1 & 2, 3 & 4
80486DX2	2 & 3	2 & 3	1 & 2	1 & 2	Open	1 & 2, 3 & 4
SL80486DX2	2 & 3	2 & 3	1 & 2	3 & 4	Open	1 & 2, 3 & 4
AM486DX4	2 & 3	2 & 3	1 & 2	1 & 2	Open	1 & 2, 3 & 4
SL AM486DX4 WT	2 & 3	1 & 2	1 & 2	3 & 4	Open	1 & 2, 3 & 4
SL AM486DX4 WB	2 & 3	2 & 3	1 & 2	3 & 4	Open	1 & 2, 3 & 4
SL80486DX4	2 & 3	2 & 3	1 & 2	3 & 4	Open	1 & 2, 3 & 4
P24D	2 & 3	2 & 3	1 & 2	3 & 4	Open	1 & 2, 3 & 4
Pentium Overdrive	2 & 3	2 & 3	1 & 2	3 & 4, 5 & 6	1 & 2	1 & 2, 3 & 4
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP22	JP23
Cyrix	pins 2 & 3 closed	pins 1 & 2 closed
AMD	pins 1 & 2 closed	pins 1 & 2 closed
UMC	pins 1 & 2 closed	pins 2 & 3 closed
Intel	pins 1 & 2 closed	pins 1 & 2 closed

CPU SPEED CONFIGURATION
Speed	JP5	JP7	JP8
20MHz	Open	Open	Open
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	JP18	JP19
3.3v	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
4v	pins 2 & 3 closed	pins 1 & 2 closed	pins 1 & 2 closed
5v	Open	pins 2 & 3 closed	pins 2 & 3 closed

DMA CONFIGURATION
DMA	JP47	JP48
DMA 1	pins 1 & 2 closed	pins 1 & 2 closed
DMA 3	pins 2 & 3 closed	pins 2 & 3 closed