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

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
»
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
»
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 (CON’T)
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 (CON’T)
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 (CON’T)
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

Headaches Begone! A Systemic Approach To Healing Your Headaches

Don't Let Your Bike Seat Ruin Your Sex Life Book

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

Search

My Books

Discover

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
»	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
»	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 (CON’T)
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

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 (CON’T)
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