MB-8425/33/40/50UUC Motherboard Settings and Configuration

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

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MB-8425/33/40/50UUC Motherboard Settings and Configuration

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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