SQ578 Motherboard Settings and Configuration

BCM ADVANCED RESEARCH, INC.

SQ578

Processor
CX 6X86/CX 6X86L/CX 686MX/IDT-C6/AM K5/Pentium
Processor Speed
75/90/100/120/133/150/166/200/233/266/300MHz
Chip Set
SIS
Video Chip Set
Unidentified
Maximum Onboard Memory
256MB
Maximum Video Memory
Unidentified
Cache
256/512KB
BIOS
Unidentified
Dimensions
270mm 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), VGA feature connector, VGA interface, IR connector, USB connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
PS/2 mouse interface
J1
External battery
J29
Serial port 1
J5
Chassis fan power
J30
USB connector
J6
Power LED & keylock
J31/pins 1 - 5
Serial port 2
J9
Speaker
J31/pins 7 - 10
Floppy drive interface
J21
IDE interface LED
J31/pins 12 & 24
Parallel port
J22
Reset switch
J31/pins 21 & 22
VGA feature connector
J25
Green PC connector
J32
IDE interface 2
J26
Green PC LED
J33
VGA interface
J27
IR connector
J34
IDE interface 1
J28
32-bit PCI slots
PC1 – PC4

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
CMOS memory normal operation
JP1
Pins 1 & 2 closed

CMOS memory clear
JP1
Pins 2 & 3 closed

Cyrix linear bust mode select interleave burst
JP18
Open

Cyrix linear bust mode select linear burst
JP18
Closed

SIMM 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
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
128MB
(2) 16M x 36
None
136MB
(2) 16M x 36
(2) 1M x 36
144MB
(2) 16M x 36
(2) 2M x 36
160MB
(2) 16M x 36
(2) 4M x 36
192MB
(2) 16M x 36
(2) 8M x 36
256MB
(2) 16M x 36
(2) 16M x 36
Note: Board accepts EDO memory.

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) 8M x 64
None
64MB
(1) 4M x 64
(1) 4M x 64
72MB
(1) 8M x 64
(1) 1M x 64
80MB
(1) 8M x 64
(1) 2M x 64
96MB
(1) 8M x 64
(1) 4M x 64
128MB
(1) 16M x 64
None
128MB
(1) 8M x 64
(1) 8M x 64
136MB
(1) 16M x 64
(1) 1M x 64
144MB
(1) 16M x 64
(1) 2M x 64
160MB
(1) 16M x 64
(1) 4M x 64
192MB
(1) 16M x 64
(1) 8M x 64
256MB
(1) 16M x 64
(1) 16M x 64

DIMM VOLTAGE CONFIGURATION
Voltage
JP2
3.3v
Pins 2 & 3 closed
5v
Pins 1 & 2 closed

CACHE CONFIGURATION
Size
Bank 0
256KB
(2) 32K x 32
512KB
(2) 64K x 32

CPU SPEED SELECTION (CX 6X86/6X86L)
CPU speed
Clock speed
Multiplier
JP4
JP5
JP6
JP7
JP8
JP9
120MHz
50MHz
2x
Closed
Closed
Open
Closed
Open
Open
133MHz
55MHz
2x
Open
Open
Open
Closed
Open
Open
150MHz
60MHz
2x
Open
Closed
Open
Closed
Open
Open
166MHz
66MHz
2x
Closed
Open
Open
Closed
Open
Open
200MHz
75MHz
2x
Closed
Closed
Closed
Closed
Open
Open

CPU SPEED SELECTION (CX 6X86MX)
CPU speed
Clock speed
Multiplier
JP4
JP5
JP6
JP7
JP8
JP9
133MHz
50MHz
2x
Closed
Closed
Open
Closed
Open
Open
133MHz
55MHz
2x
Open
Open
Open
Closed
Open
Open
150MHz
60MHz
2x
Open
Closed
Open
Closed
Open
Open
150MHz
50MHz
2.5x
Closed
Closed
Open
Closed
Closed
Open
166MHz
66MHz
2x
Closed
Open
Open
Closed
Open
Open
166MHz
75MHz
2.5x
Open
Open
Open
Closed
Closed
Open
166MHz
50MHz
3x
Closed
Closed
Open
Open
Closed
Open
166MHz
60MHz
2.5x
Open
Closed
Open
Closed
Closed
Open
200MHz
75MHz
2x
Closed
Closed
Closed
Closed
Open
Open
200MHz
75MHz
3x
Open
Open
Open
Open
Closed
Open
200MHz
55MHz
2.5x
Closed
Open
Open
Closed
Closed
Open
200MHz
60MHz
3x
Open
Closed
Open
Open
Closed
Open
233MHz
75MHz
2.5x
Closed
Closed
Closed
Closed
Closed
Open
233MHz
66MHz
3x
Closed
Open
Open
Open
Closed
Open
266MHz
66MHz
3.5x
Closed
Open
Open
Open
Open
Open
266MHz
75MHz
3x
Closed
Closed
Closed
Open
Closed
Open

CPU SPEED SELECTION (AMD)
CPU speed
Clock speed
Multiplier
JP4
JP5
JP6
JP7
JP8
JP9
75MHz
50MHz
1.5x
Closed
Closed
Open
Open
Open
Open
90MHz
60MHz
1.5x
Open
Closed
Open
Open
Open
Open
100MHz
66MHz
1.5x
Closed
Open
Open
Open
Open
Open
120MHz
60MHz
2x
Open
Closed
Open
Closed
Open
Open
133MHz
66MHz
2x
Closed
Open
Open
Closed
Open
Open
150MHz
60MHz
2.5x
Open
Closed
Open
Closed
Closed
Open
166MHz
66MHz
2.5x
Closed
Open
Open
Closed
Closed
Open
200MHz
66MHz
3x
Closed
Open
Open
Open
Closed
Open
233MHz
66MHz
3.5x
Closed
Open
Open
Open
Open
Open
266MHz
66MHz
4x
Closed
Open
Open
Closed
Open
Closed
300MHz
66MHz
4.5x
Closed
Open
Open
Closed
Closed
Closed

CPU SPEED SELECTION (IDT-C6)
CPU speed
Clock speed
Multiplier
JP4
JP5
JP6
JP7
JP8
JP9
150MHz
50MHz
3x
Closed
Closed
Open
Open
Closed
Open
150MHz
75MHz
2x
Closed
Closed
Closed
Closed
Open
Open
180MHz
60MHz
3x
Open
Closed
Open
Open
Closed
Open
200MHz
66MHz
3x
Closed
Open
Open
Open
Closed
Open

CPU SPEED SELECTION (INTEL)
CPU speed
Clock speed
Multiplier
JP4
JP5
JP6
JP7
JP8
JP9
75MHz
50MHz
1.5x
Closed
Closed
Open
Open
Open
Open
90MHz
60MHz
1.5x
Open
Closed
Open
Open
Open
Open
100MHz
66MHz
1.5x
Closed
Open
Open
Open
Open
Open
120MHz
60MHz
2x
Open
Closed
Open
Closed
Open
Open
133MHz
66MHz
2x
Closed
Open
Open
Closed
Open
Open
150MHz
60MHz
2.5x
Open
Closed
Open
Closed
Closed
Open
166MHz
66MHz
2.5x
Closed
Open
Open
Closed
Closed
Open
200MHz
66MHz
3x
Closed
Open
Open
Open
Closed
Open
233MHz
66MHz
3.5x
Closed
Open
Open
Open
Open
Open
266MHz
66MHz
4x
Closed
Open
Open
Closed
Open
Closed
300MHz
66MHz
4.5x
Closed
Open
Open
Closed
Closed
Closed

CPU VOLTAGE SELECTION (SINGLE)
Voltage
JP10
JP11
JP12
JP13
JP14
JP15
JP16
3.38v
Open
Open
Open
Closed
Open
1 & 2
1 & 2
3.52v
Open
Open
Open
Open
Closed
1 & 2
1 & 2
Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION (DUAL)
Voltage
V core
JP10
JP11
JP12
JP13
JP14
JP15
JP16
3.3v
2.1
Open
Open
Open
Open
Open
2 & 3
2 & 3
3.3v
2.8
Closed
Open
Open
Open
Open
2 & 3
2 & 3
3.3v
2.9
Open
Closed
Open
Open
Open
2 & 3
2 & 3
3.3v
3.2
Open
Open
Closed
Open
Open
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

ON BOARD VGA SELECTION
Setting
JP3
JP17
Enabled
Pins 2 & 3 closed
Open
Disabled
Pins 1 & 2 closed
Closed
Note: these jumpers are optional and may not be present.

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SQ578 Motherboard Settings and Configuration

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Processor	CX 6X86/CX 6X86L/CX 686MX/IDT-C6/AM K5/Pentium
Processor Speed	75/90/100/120/133/150/166/200/233/266/300MHz
Chip Set	SIS
Video Chip Set	Unidentified
Maximum Onboard Memory	256MB
Maximum Video Memory	Unidentified
Cache	256/512KB
BIOS	Unidentified
Dimensions	270mm 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), VGA feature connector, VGA interface, IR connector, USB connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
PS/2 mouse interface	J1	External battery	J29
Serial port 1	J5	Chassis fan power	J30
USB connector	J6	Power LED & keylock	J31/pins 1 - 5
Serial port 2	J9	Speaker	J31/pins 7 - 10
Floppy drive interface	J21	IDE interface LED	J31/pins 12 & 24
Parallel port	J22	Reset switch	J31/pins 21 & 22
VGA feature connector	J25	Green PC connector	J32
IDE interface 2	J26	Green PC LED	J33
VGA interface	J27	IR connector	J34
IDE interface 1	J28	32-bit PCI slots	PC1 – PC4

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	CMOS memory normal operation	JP1	Pins 1 & 2 closed
	CMOS memory clear	JP1	Pins 2 & 3 closed
	Cyrix linear bust mode select interleave burst	JP18	Open
	Cyrix linear bust mode select linear burst	JP18	Closed

SIMM 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
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
128MB	(2) 16M x 36	None
136MB	(2) 16M x 36	(2) 1M x 36
144MB	(2) 16M x 36	(2) 2M x 36
160MB	(2) 16M x 36	(2) 4M x 36
192MB	(2) 16M x 36	(2) 8M x 36
256MB	(2) 16M x 36	(2) 16M x 36
Note: Board accepts EDO memory.

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) 8M x 64	None
64MB	(1) 4M x 64	(1) 4M x 64
72MB	(1) 8M x 64	(1) 1M x 64
80MB	(1) 8M x 64	(1) 2M x 64
96MB	(1) 8M x 64	(1) 4M x 64
128MB	(1) 16M x 64	None
128MB	(1) 8M x 64	(1) 8M x 64
136MB	(1) 16M x 64	(1) 1M x 64
144MB	(1) 16M x 64	(1) 2M x 64
160MB	(1) 16M x 64	(1) 4M x 64
192MB	(1) 16M x 64	(1) 8M x 64
256MB	(1) 16M x 64	(1) 16M x 64

DIMM VOLTAGE CONFIGURATION
Voltage	JP2
3.3v	Pins 2 & 3 closed
5v	Pins 1 & 2 closed

CACHE CONFIGURATION
Size	Bank 0
256KB	(2) 32K x 32
512KB	(2) 64K x 32

CPU SPEED SELECTION (CX 6X86/6X86L)
CPU speed	Clock speed	Multiplier	JP4	JP5	JP6	JP7	JP8	JP9
120MHz	50MHz	2x	Closed	Closed	Open	Closed	Open	Open
133MHz	55MHz	2x	Open	Open	Open	Closed	Open	Open
150MHz	60MHz	2x	Open	Closed	Open	Closed	Open	Open
166MHz	66MHz	2x	Closed	Open	Open	Closed	Open	Open
200MHz	75MHz	2x	Closed	Closed	Closed	Closed	Open	Open

CPU SPEED SELECTION (CX 6X86MX)
CPU speed	Clock speed	Multiplier	JP4	JP5	JP6	JP7	JP8	JP9
133MHz	50MHz	2x	Closed	Closed	Open	Closed	Open	Open
133MHz	55MHz	2x	Open	Open	Open	Closed	Open	Open
150MHz	60MHz	2x	Open	Closed	Open	Closed	Open	Open
150MHz	50MHz	2.5x	Closed	Closed	Open	Closed	Closed	Open
166MHz	66MHz	2x	Closed	Open	Open	Closed	Open	Open
166MHz	75MHz	2.5x	Open	Open	Open	Closed	Closed	Open
166MHz	50MHz	3x	Closed	Closed	Open	Open	Closed	Open
166MHz	60MHz	2.5x	Open	Closed	Open	Closed	Closed	Open
200MHz	75MHz	2x	Closed	Closed	Closed	Closed	Open	Open
200MHz	75MHz	3x	Open	Open	Open	Open	Closed	Open
200MHz	55MHz	2.5x	Closed	Open	Open	Closed	Closed	Open
200MHz	60MHz	3x	Open	Closed	Open	Open	Closed	Open
233MHz	75MHz	2.5x	Closed	Closed	Closed	Closed	Closed	Open
233MHz	66MHz	3x	Closed	Open	Open	Open	Closed	Open
266MHz	66MHz	3.5x	Closed	Open	Open	Open	Open	Open
266MHz	75MHz	3x	Closed	Closed	Closed	Open	Closed	Open

CPU SPEED SELECTION (AMD)
CPU speed	Clock speed	Multiplier	JP4	JP5	JP6	JP7	JP8	JP9
75MHz	50MHz	1.5x	Closed	Closed	Open	Open	Open	Open
90MHz	60MHz	1.5x	Open	Closed	Open	Open	Open	Open
100MHz	66MHz	1.5x	Closed	Open	Open	Open	Open	Open
120MHz	60MHz	2x	Open	Closed	Open	Closed	Open	Open
133MHz	66MHz	2x	Closed	Open	Open	Closed	Open	Open
150MHz	60MHz	2.5x	Open	Closed	Open	Closed	Closed	Open
166MHz	66MHz	2.5x	Closed	Open	Open	Closed	Closed	Open
200MHz	66MHz	3x	Closed	Open	Open	Open	Closed	Open
233MHz	66MHz	3.5x	Closed	Open	Open	Open	Open	Open
266MHz	66MHz	4x	Closed	Open	Open	Closed	Open	Closed
300MHz	66MHz	4.5x	Closed	Open	Open	Closed	Closed	Closed

CPU SPEED SELECTION (IDT-C6)
CPU speed	Clock speed	Multiplier	JP4	JP5	JP6	JP7	JP8	JP9
150MHz	50MHz	3x	Closed	Closed	Open	Open	Closed	Open
150MHz	75MHz	2x	Closed	Closed	Closed	Closed	Open	Open
180MHz	60MHz	3x	Open	Closed	Open	Open	Closed	Open
200MHz	66MHz	3x	Closed	Open	Open	Open	Closed	Open

CPU SPEED SELECTION (INTEL)
CPU speed	Clock speed	Multiplier	JP4	JP5	JP6	JP7	JP8	JP9
75MHz	50MHz	1.5x	Closed	Closed	Open	Open	Open	Open
90MHz	60MHz	1.5x	Open	Closed	Open	Open	Open	Open
100MHz	66MHz	1.5x	Closed	Open	Open	Open	Open	Open
120MHz	60MHz	2x	Open	Closed	Open	Closed	Open	Open
133MHz	66MHz	2x	Closed	Open	Open	Closed	Open	Open
150MHz	60MHz	2.5x	Open	Closed	Open	Closed	Closed	Open
166MHz	66MHz	2.5x	Closed	Open	Open	Closed	Closed	Open
200MHz	66MHz	3x	Closed	Open	Open	Open	Closed	Open
233MHz	66MHz	3.5x	Closed	Open	Open	Open	Open	Open
266MHz	66MHz	4x	Closed	Open	Open	Closed	Open	Closed
300MHz	66MHz	4.5x	Closed	Open	Open	Closed	Closed	Closed

CPU VOLTAGE SELECTION (SINGLE)
Voltage	JP10	JP11	JP12	JP13	JP14	JP15	JP16
3.38v	Open	Open	Open	Closed	Open	1 & 2	1 & 2
3.52v	Open	Open	Open	Open	Closed	1 & 2	1 & 2
Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION (DUAL)
Voltage	V core	JP10	JP11	JP12	JP13	JP14	JP15	JP16
3.3v	2.1	Open	Open	Open	Open	Open	2 & 3	2 & 3
3.3v	2.8	Closed	Open	Open	Open	Open	2 & 3	2 & 3
3.3v	2.9	Open	Closed	Open	Open	Open	2 & 3	2 & 3
3.3v	3.2	Open	Open	Closed	Open	Open	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

ON BOARD VGA SELECTION
Setting	JP3	JP17
Enabled	Pins 2 & 3 closed	Open
Disabled	Pins 1 & 2 closed	Closed
Note: these jumpers are optional and may not be present.