MB557 Motherboard Settings and Configuration

ANTEC, INC.

MB557

Processor
CX M1/IBM/AM K5/AM K6/Pentium
Processor Speed
75/90/100/120/125/133/150/166/200MHz
Chip Set
Intel
Video Chip Set
None
Maximum Onboard Memory
128MB (EDO supported)
Maximum Video Memory
1MB
Cache
256/512KB
BIOS
Award
Dimensions
280mm x 220mm
I/O Options
32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), cache slot, IR connector, USB connectors (2)
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Floppy drive interface
CN1
PS/2 mouse interface
J99
Serial port 1
CN2
Chassis fan power
JP1
Serial port 2
CN3
IR connector
JP3
Parallel port
CN4
Reset switch
JP12
IDE interface 1
J6
Green PC connector
JP15
IDE interface 2
J7
IDE interface LED
JP22
USB connector
J10
Green PC LED
JP33
USB connector
J11
32-bit PCI slots
PC1 – PC4
Speaker
J12
Cache slot
SL1
Power LED & keylock
J14

USER CONFIGURABLE SETTINGS
Function
Label
Position

Monitor type select CGA40/CGA80
JP7
Closed

Monitor type select monochrome
JP7
Open

Monitor type select color
JP7
Any setting
»
Password normal operation
JP9
Open

Password clear
JP9
Closed

Flash BIOS voltage select 12v
JP19
Pins 1 & 2 closed

Flash BIOS voltage select 5v
JP19
Pins 2 & 3 closed
»
CMOS memory normal operation
JP21
Open

CMOS memory clear
JP21
Closed
»
Factory configured - do not alter
JP39
Pins 2 & 3 closed
»
Factory configured - do not alter
JP43
Closed
»
Factory configured - do not alter
JP44
Open
Note: If Cyrix 6x86 or AMD K5 processor is installed, JP9 is not available.

DRAM CONFIGURATION
Size
Bank 0
Bank 1
8MB
(2) 1M x 36
None
16MB
(2) 2M x 36
None
16MB
(2) 1M x 36
(2) 1M x 36
24MB
(2) 2M x 36
(2) 1M x 36
32MB
(2) 4M x 36
None
32MB
(2) 2M x 36
(2) 2M x 36
40MB
(2) 4M x 36
(2) 1M x 36
48MB
(2) 4M x 36
(2) 2M x 36
64MB
(2) 8M x 36
None
64MB
(2) 4M x 36
(2) 4M x 36

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
72MB
(2) 8M x 36
(2) 1M x 36
80MB
(2) 8M x 36
(2) 2M x 36
96MB
(2) 8M x 36
(2) 4M x 36
128MB
(2) 8M x 36
(2) 8M x 36
Note: Board accepts EDO memory. Banks are interchangeable. Do not install SIMMs & DIMMs at the same time.

DIMM CONFIGURATION
Size
Bank 0
Bank 1
8MB
(1) 1M x 64
None
16MB
(1) 2M x 64
None
16MB
(1) 1M x 64
(1) 1M x 64
24MB
(1) 2M x 64
(1) 1M x 64
32MB
(1) 4M x 64
None
32MB
(1) 2M x 64
(1) 2M x 64
40MB
(1) 4M x 64
(1) 1M x 64
48MB
(1) 4M x 64
(1) 2M x 64
64MB
(1) 4M x 64
(1) 4M x 64

CACHE CONFIGURATION
Size
Bank 0
SL1
256KB
(2) 32K x 32
Not installed
512KB
(2) 32K x 32
256KB module installed

CACHE JUMPER CONFIGURATION
Size
JP29
JP30
256KB
Pins 2 & 3 closed
Pins 2 & 3 closed
512KB
Pins 1 & 2 closed
Pins 1 & 2 closed

CPU SPEED SELECTION (CYRIX)
CPU speed
Clock speed
Multiplier
JP23
JP24
JP36
120MHz
50MHz
2x
1 & 2
2 & 3
1 & 2, 3 & 4, 5 & 6
133MHz
55MHz
2x
1 & 2
2 & 3
1 & 2, 5 & 6
150MHz
60MHz
2x
1 & 2
2 & 3
1 & 2, 3 & 4
166MHz
66MHz
2x
1 & 2
2 & 3
3 & 4, 5 & 6
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (IBM)
CPU speed
Clock speed
Multiplier
JP23
JP24
JP36
120MHz
50MHz
2x
1 & 2
2 & 3
1 & 2, 3 & 4, 5 & 6
133MHz
55MHz
2x
1 & 2
2 & 3
1 & 2, 5 & 6
150MHz
60MHz
2x
1 & 2
2 & 3
1 & 2, 3 & 4
166MHz
66MHz
2x
1 & 2
2 & 3
3 & 4, 5 & 6
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (AMD)
CPU speed
Clock speed
Multiplier
JP23
JP24
JP36
75MHz
50MHz
1.5x
2 & 3
2 & 3
1 & 2, 3 & 4, 5 & 6
90MHz
60MHz
1.5x
2 & 3
2 & 3
1 & 2, 3 & 4
100MHz
66MHz
1.5x
2 & 3
2 & 3
3 & 4, 5 & 6
120MHz
60MHz
1.5x
2 & 3
2 & 3
1 & 2, 3 & 4
133MHz
66MHz
1.5x
2 & 3
2 & 3
3 & 4, 5 & 6
150MHz
60MHz
1.75x
1 & 2
1 & 2
1 & 2, 3 & 4
166MHz
66MHz
1.75x
1 & 2
1 & 2
3 & 4, 5 & 6
166MHz
66MHz
2.5x
1 & 2
1 & 2
3 & 4, 5 & 6
200MHz
66MHz
3x
2 & 3
1 & 2
3 & 4, 5 & 6
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)
CPU speed
Clock speed
Multiplier
JP23
JP24
JP36
75MHz
50MHz
1.5x
2 & 3
2 & 3
1 & 2, 3 & 4, 5 & 6
90MHz
60MHz
1.5x
2 & 3
2 & 3
1 & 2, 3 & 4
100MHz
66MHz
1.5x
2 & 3
2 & 3
3 & 4, 5 & 6
120MHz
60MHz
2x
1 & 2
2 & 3
1 & 2, 3 & 4
125MHz
50MHz
2.5x
1 & 2
1 & 2
1 & 2, 3 & 4, 5 & 6
133MHz
66MHz
2x
1 & 2
2 & 3
3 & 4, 5 & 6
150MHz
60MHz
2.5x
1 & 2
1 & 2
1 & 2, 3 & 4
166MHz
66MHz
2.5x
1 & 2
1 & 2
3 & 4, 5 & 6
200MHz
66MHz
3x
2 & 3
1 & 2
3 & 4, 5 & 6
Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION (SINGLE)
Voltage
J100
J105
J107
J108
2.82v
Open
3 & 4
Open
1 & 3, 2 & 4
2.94v
2 & 4
3 & 4
Open
1 & 3, 2 & 4
3.10v
3 & 4
3 & 4
Open
1 & 3, 2 & 4
3.33v
1 & 3
3 & 4
Open
1 & 3, 2 & 4
3.53v
1 & 3, 2 & 4
3 & 4
Open
1 & 3, 2 & 4
Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION (DUAL)
Voltage
V core
J100
J105
J107
J108
3.33v
2.82v
Open
3 & 4
1 & 3, 2 & 4
Open
3.33v
2.94v
2 & 4
3 & 4
1 & 3, 2 & 4
Open
3.33v
3.10v
3 & 4
3 & 4
1 & 3, 2 & 4
Open
3.44v
2.82v
Open
2 & 4
1 & 3, 2 & 4
Open
3.44v
2.94v
2 & 4
2 & 4
1 & 3, 2 & 4
Open
3.44v
3.10v
3 & 4
2 & 4
1 & 3, 2 & 4
Open
Note: Pins designated should be in the closed position.

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Processor	CX M1/IBM/AM K5/AM K6/Pentium
Processor Speed	75/90/100/120/125/133/150/166/200MHz
Chip Set	Intel
Video Chip Set	None
Maximum Onboard Memory	128MB (EDO supported)
Maximum Video Memory	1MB
Cache	256/512KB
BIOS	Award
Dimensions	280mm x 220mm
I/O Options	32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), cache slot, IR connector, USB connectors (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Floppy drive interface	CN1	PS/2 mouse interface	J99
Serial port 1	CN2	Chassis fan power	JP1
Serial port 2	CN3	IR connector	JP3
Parallel port	CN4	Reset switch	JP12
IDE interface 1	J6	Green PC connector	JP15
IDE interface 2	J7	IDE interface LED	JP22
USB connector	J10	Green PC LED	JP33
USB connector	J11	32-bit PCI slots	PC1 – PC4
Speaker	J12	Cache slot	SL1
Power LED & keylock	J14

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Monitor type select CGA40/CGA80	JP7	Closed
	Monitor type select monochrome	JP7	Open
	Monitor type select color	JP7	Any setting
»	Password normal operation	JP9	Open
	Password clear	JP9	Closed
	Flash BIOS voltage select 12v	JP19	Pins 1 & 2 closed
	Flash BIOS voltage select 5v	JP19	Pins 2 & 3 closed
»	CMOS memory normal operation	JP21	Open
	CMOS memory clear	JP21	Closed
»	Factory configured - do not alter	JP39	Pins 2 & 3 closed
»	Factory configured - do not alter	JP43	Closed
»	Factory configured - do not alter	JP44	Open
Note: If Cyrix 6x86 or AMD K5 processor is installed, JP9 is not available.

DRAM CONFIGURATION
Size	Bank 0	Bank 1
8MB	(2) 1M x 36	None
16MB	(2) 2M x 36	None
16MB	(2) 1M x 36	(2) 1M x 36
24MB	(2) 2M x 36	(2) 1M x 36
32MB	(2) 4M x 36	None
32MB	(2) 2M x 36	(2) 2M x 36
40MB	(2) 4M x 36	(2) 1M x 36
48MB	(2) 4M x 36	(2) 2M x 36
64MB	(2) 8M x 36	None
64MB	(2) 4M x 36	(2) 4M x 36

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1
72MB	(2) 8M x 36	(2) 1M x 36
80MB	(2) 8M x 36	(2) 2M x 36
96MB	(2) 8M x 36	(2) 4M x 36
128MB	(2) 8M x 36	(2) 8M x 36
Note: Board accepts EDO memory. Banks are interchangeable. Do not install SIMMs & DIMMs at the same time.

DIMM CONFIGURATION
Size	Bank 0	Bank 1
8MB	(1) 1M x 64	None
16MB	(1) 2M x 64	None
16MB	(1) 1M x 64	(1) 1M x 64
24MB	(1) 2M x 64	(1) 1M x 64
32MB	(1) 4M x 64	None
32MB	(1) 2M x 64	(1) 2M x 64
40MB	(1) 4M x 64	(1) 1M x 64
48MB	(1) 4M x 64	(1) 2M x 64
64MB	(1) 4M x 64	(1) 4M x 64

CACHE CONFIGURATION
Size	Bank 0	SL1
256KB	(2) 32K x 32	Not installed
512KB	(2) 32K x 32	256KB module installed

CACHE JUMPER CONFIGURATION
Size	JP29	JP30
256KB	Pins 2 & 3 closed	Pins 2 & 3 closed
512KB	Pins 1 & 2 closed	Pins 1 & 2 closed

CPU SPEED SELECTION (CYRIX)
CPU speed	Clock speed	Multiplier	JP23	JP24	JP36
120MHz	50MHz	2x	1 & 2	2 & 3	1 & 2, 3 & 4, 5 & 6
133MHz	55MHz	2x	1 & 2	2 & 3	1 & 2, 5 & 6
150MHz	60MHz	2x	1 & 2	2 & 3	1 & 2, 3 & 4
166MHz	66MHz	2x	1 & 2	2 & 3	3 & 4, 5 & 6
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (IBM)
CPU speed	Clock speed	Multiplier	JP23	JP24	JP36
120MHz	50MHz	2x	1 & 2	2 & 3	1 & 2, 3 & 4, 5 & 6
133MHz	55MHz	2x	1 & 2	2 & 3	1 & 2, 5 & 6
150MHz	60MHz	2x	1 & 2	2 & 3	1 & 2, 3 & 4
166MHz	66MHz	2x	1 & 2	2 & 3	3 & 4, 5 & 6
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (AMD)
CPU speed	Clock speed	Multiplier	JP23	JP24	JP36
75MHz	50MHz	1.5x	2 & 3	2 & 3	1 & 2, 3 & 4, 5 & 6
90MHz	60MHz	1.5x	2 & 3	2 & 3	1 & 2, 3 & 4
100MHz	66MHz	1.5x	2 & 3	2 & 3	3 & 4, 5 & 6
120MHz	60MHz	1.5x	2 & 3	2 & 3	1 & 2, 3 & 4
133MHz	66MHz	1.5x	2 & 3	2 & 3	3 & 4, 5 & 6
150MHz	60MHz	1.75x	1 & 2	1 & 2	1 & 2, 3 & 4
166MHz	66MHz	1.75x	1 & 2	1 & 2	3 & 4, 5 & 6
166MHz	66MHz	2.5x	1 & 2	1 & 2	3 & 4, 5 & 6
200MHz	66MHz	3x	2 & 3	1 & 2	3 & 4, 5 & 6
Note: Pins designated should be in the closed position.

CPU SPEED SELECTION (INTEL)
CPU speed	Clock speed	Multiplier	JP23	JP24	JP36
75MHz	50MHz	1.5x	2 & 3	2 & 3	1 & 2, 3 & 4, 5 & 6
90MHz	60MHz	1.5x	2 & 3	2 & 3	1 & 2, 3 & 4
100MHz	66MHz	1.5x	2 & 3	2 & 3	3 & 4, 5 & 6
120MHz	60MHz	2x	1 & 2	2 & 3	1 & 2, 3 & 4
125MHz	50MHz	2.5x	1 & 2	1 & 2	1 & 2, 3 & 4, 5 & 6
133MHz	66MHz	2x	1 & 2	2 & 3	3 & 4, 5 & 6
150MHz	60MHz	2.5x	1 & 2	1 & 2	1 & 2, 3 & 4
166MHz	66MHz	2.5x	1 & 2	1 & 2	3 & 4, 5 & 6
200MHz	66MHz	3x	2 & 3	1 & 2	3 & 4, 5 & 6
Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION (SINGLE)
Voltage	J100	J105	J107	J108
2.82v	Open	3 & 4	Open	1 & 3, 2 & 4
2.94v	2 & 4	3 & 4	Open	1 & 3, 2 & 4
3.10v	3 & 4	3 & 4	Open	1 & 3, 2 & 4
3.33v	1 & 3	3 & 4	Open	1 & 3, 2 & 4
3.53v	1 & 3, 2 & 4	3 & 4	Open	1 & 3, 2 & 4
Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION (DUAL)
Voltage	V core	J100	J105	J107	J108
3.33v	2.82v	Open	3 & 4	1 & 3, 2 & 4	Open
3.33v	2.94v	2 & 4	3 & 4	1 & 3, 2 & 4	Open
3.33v	3.10v	3 & 4	3 & 4	1 & 3, 2 & 4	Open
3.44v	2.82v	Open	2 & 4	1 & 3, 2 & 4	Open
3.44v	2.94v	2 & 4	2 & 4	1 & 3, 2 & 4	Open
3.44v	3.10v	3 & 4	2 & 4	1 & 3, 2 & 4	Open
Note: Pins designated should be in the closed position.