V55LA-2 Motherboard Settings and Configuration

ACER, INC.

V55LA-2

Device Type
Mainboard
Processor
CX 6X86/CX 6X86L/CX 6X86MX/AM K5/AM K6/Pentium/Pentium MMX
Processor Speed
75/90/100/120/133/150/166/180/200/233MHz
Chip Set
Unidentified
Video Chip Set
Unidentified
Maximum Onboard Memory
128MB (EDO supported)
Maximum Video Memory
2MB
Cache
256/512/1024KB
BIOS
Acer
Dimensions
254mm x 218mm
I/O Options
Floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot, USB connector, line in, wavetable connector, audio in – CD-ROM

CONNECTIONS
Purpose
Location
Purpose
Location
Ethernet/multimedia connector
CN1
CPU fan power
CN18
Audio in – CD-ROM
CN2
Front panel connector
CN19
USB connector
CN5
VGA port
CN21
Wavetable connector
CN6
Modem connector
CN22
PS/2 mouse port
CN8
ATI media connector
CN23
Audio connector
CN9
Line in
CN31
Floppy drive interface
CN10
Green PC connector
JP15
IDE interface 2
CN11
External battery
JP30
IDE interface 1
CN12
IDE interface LED
JP48/pins 1/3/5
Serial port 1
CN13
Power LED
JP48/pins 2/4/6
Serial port 2
CN14
Power on connector
JP50
Parallel port
CN17
Riser slot
SL1
Note: The location of CN1 is unidentified.

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
Factory configured - do not alter
CN30
Unidentified

BIOS type select Acer
JP1
Pins 1 & 2 closed

BIOS type select OEM
JP1
Pins 2 & 3 closed

LED select IDE LED only
JP2
Pins 2 & 3 closed

LED select IDE & floppy
JP2
Pins 1 & 2 closed

CN19/pins 19 & 20 supports green PC
JP11
Pins 1 & 2 closed

UPS enabled
JP16
Pins 1 & 2 closed

UPS disabled
JP16
Pins 2 & 3 closed
»
Factory configured - do not alter
JP42
Unidentified

On board sound enabled
SW2/5
Off

On board sound disabled
SW2/5
On

Password disabled
SW2/6
On

Password enabled
SW2/6
Off

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
Note: Board accepts EDO memory.

CACHE CONFIGURATION
Size
Bank 0
TAG
256KB
(2) 32K x 32
Unidentified
512KB
(2) 64K x 32
Unidentified
1MB
(2) 128K x 32
Unidentified

CACHE JUMPER CONFIGURATION
Size
JP3
JP4
256KB
Pins 1 & 2 closed
Pins 1 & 2 closed
512KB
Pins 1 & 2 closed
Pins 2 & 3 closed
1MB
Pins 2 & 3 closed
Pins 2 & 3 closed

VIDEO MEMORY CONFIGURATION
Size
Bank 0
Bank 1
1MB
(2) 256K x 16
None
2MB
(2) 256K x 16
(2) 256K x 16

CPU SPEED SELECTION (CX 6X86)
CPU speed
Clock speed
Multiplier
SW2/1
SW2/2
SW2/3
SW2/4
120MHz
50MHz
2x
On
On
On
Off
150MHz
60MHz
2x
On
Off
On
Off
166MHz
66MHz
2x
Off
On
On
Off

CPU SPEED SELECTION (CX 6X86L)
CPU speed
Clock speed
Multiplier
SW2/1
SW2/2
SW2/3
SW2/4
120MHz
50MHz
2x
On
On
On
Off
150MHz
60MHz
2x
On
Off
On
Off
166MHz
66MHz
2x
Off
On
On
Off

CPU SPEED SELECTION (CX 6X86MX)
CPU speed
Clock speed
Multiplier
SW2/1
SW2/2
SW2/3
SW2/4
166MHz
66MHz
2.5x
Off
On
On
On
180MHz
60MHz
3x
On
Off
Off
On
200MHz
66MHz
3x
Off
On
Off
On

CPU SPEED SELECTION (AM K5)
CPU speed
Clock speed
Multiplier
SW2/1
SW2/2
SW2/3
SW2/4
75MHz
50MHz
1.5x
On
On
Off
Off
90MHz
60MHz
1.5x
On
Off
Off
Off
100MHz
66MHz
1.5x
Off
On
Off
Off
120MHz
60MHz
2x
On
Off
On
Off
133MHz
66MHz
2x
Off
On
On
Off
166MHz
66MHz
2.5x
Off
On
On
On

CPU SPEED SELECTION (AM K6)
CPU speed
Clock speed
Multiplier
SW2/1
SW2/2
SW2/3
SW2/4
166MHz
66MHz
2.5x
Off
On
On
On
200MHz
66MHz
3x
Off
On
Off
On
233MHz
66MHz
3.5x
Off
On
Off
Off

CPU SPEED SELECTION (INTEL)
CPU speed
Clock speed
Multiplier
SW2/1
SW2/2
SW2/3
SW2/4
75MHz
50MHz
1.5x
On
On
Off
Off
90MHz
60MHz
1.5x
On
Off
Off
Off
100MHz
66MHz
1.5x
Off
On
Off
Off
120MHz
60MHz
2x
On
Off
On
Off
133MHz
66MHz
2x
Off
On
On
Off
150MHz
60MHz
2.5x
On
Off
On
On
166MHz
66MHz
2.5x
Off
On
On
On
200MHz
66MHz
3x
Off
On
Off
On

CPU SPEED SELECTION (INTEL MMX)
CPU speed
Clock speed
Multiplier
SW2/1
SW2/2
SW2/3
SW2/4
150MHz
60MHz
2.5x
On
Off
On
On
166MHz
66MHz
2.5x
Off
On
On
On
200MHz
66MHz
3x
Off
On
Off
On

CPU TYPE SELECTION
Type
JP7
Single voltage
Closed
Dual voltage
Open

CPU VOLTAGE SELECTION
Voltage
V core
JP43
JP44
3.3v
2.8v
Pins 2 & 3 closed
Pins 2 & 3 closed
3.3v
3.2v
Pins 2 & 3 closed
Pins 1 & 2 closed
3.5v
2.8v
Pins 1 & 2 closed
Pins 2 & 3 closed
3.5v
3.2v
Pins 1 & 2 closed
Pins 1 & 2 closed

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Device Type	Mainboard
Processor	CX 6X86/CX 6X86L/CX 6X86MX/AM K5/AM K6/Pentium/Pentium MMX
Processor Speed	75/90/100/120/133/150/166/180/200/233MHz
Chip Set	Unidentified
Video Chip Set	Unidentified
Maximum Onboard Memory	128MB (EDO supported)
Maximum Video Memory	2MB
Cache	256/512/1024KB
BIOS	Acer
Dimensions	254mm x 218mm
I/O Options	Floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot, USB connector, line in, wavetable connector, audio in – CD-ROM

CONNECTIONS
Purpose	Location	Purpose	Location
Ethernet/multimedia connector	CN1	CPU fan power	CN18
Audio in – CD-ROM	CN2	Front panel connector	CN19
USB connector	CN5	VGA port	CN21
Wavetable connector	CN6	Modem connector	CN22
PS/2 mouse port	CN8	ATI media connector	CN23
Audio connector	CN9	Line in	CN31
Floppy drive interface	CN10	Green PC connector	JP15
IDE interface 2	CN11	External battery	JP30
IDE interface 1	CN12	IDE interface LED	JP48/pins 1/3/5
Serial port 1	CN13	Power LED	JP48/pins 2/4/6
Serial port 2	CN14	Power on connector	JP50
Parallel port	CN17	Riser slot	SL1
Note: The location of CN1 is unidentified.

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured - do not alter	CN30	Unidentified
	BIOS type select Acer	JP1	Pins 1 & 2 closed
	BIOS type select OEM	JP1	Pins 2 & 3 closed
	LED select IDE LED only	JP2	Pins 2 & 3 closed
	LED select IDE & floppy	JP2	Pins 1 & 2 closed
	CN19/pins 19 & 20 supports green PC	JP11	Pins 1 & 2 closed
	UPS enabled	JP16	Pins 1 & 2 closed
	UPS disabled	JP16	Pins 2 & 3 closed
»	Factory configured - do not alter	JP42	Unidentified
	On board sound enabled	SW2/5	Off
	On board sound disabled	SW2/5	On
	Password disabled	SW2/6	On
	Password enabled	SW2/6	Off

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
Note: Board accepts EDO memory.

CACHE CONFIGURATION
Size	Bank 0	TAG
256KB	(2) 32K x 32	Unidentified
512KB	(2) 64K x 32	Unidentified
1MB	(2) 128K x 32	Unidentified

CACHE JUMPER CONFIGURATION
Size	JP3	JP4
256KB	Pins 1 & 2 closed	Pins 1 & 2 closed
512KB	Pins 1 & 2 closed	Pins 2 & 3 closed
1MB	Pins 2 & 3 closed	Pins 2 & 3 closed

VIDEO MEMORY CONFIGURATION
Size	Bank 0	Bank 1
1MB	(2) 256K x 16	None
2MB	(2) 256K x 16	(2) 256K x 16

CPU SPEED SELECTION (CX 6X86)
CPU speed	Clock speed	Multiplier	SW2/1	SW2/2	SW2/3	SW2/4
120MHz	50MHz	2x	On	On	On	Off
150MHz	60MHz	2x	On	Off	On	Off
166MHz	66MHz	2x	Off	On	On	Off

CPU SPEED SELECTION (CX 6X86L)
CPU speed	Clock speed	Multiplier	SW2/1	SW2/2	SW2/3	SW2/4
120MHz	50MHz	2x	On	On	On	Off
150MHz	60MHz	2x	On	Off	On	Off
166MHz	66MHz	2x	Off	On	On	Off

CPU SPEED SELECTION (CX 6X86MX)
CPU speed	Clock speed	Multiplier	SW2/1	SW2/2	SW2/3	SW2/4
166MHz	66MHz	2.5x	Off	On	On	On
180MHz	60MHz	3x	On	Off	Off	On
200MHz	66MHz	3x	Off	On	Off	On

CPU SPEED SELECTION (AM K5)
CPU speed	Clock speed	Multiplier	SW2/1	SW2/2	SW2/3	SW2/4
75MHz	50MHz	1.5x	On	On	Off	Off
90MHz	60MHz	1.5x	On	Off	Off	Off
100MHz	66MHz	1.5x	Off	On	Off	Off
120MHz	60MHz	2x	On	Off	On	Off
133MHz	66MHz	2x	Off	On	On	Off
166MHz	66MHz	2.5x	Off	On	On	On

CPU SPEED SELECTION (AM K6)
CPU speed	Clock speed	Multiplier	SW2/1	SW2/2	SW2/3	SW2/4
166MHz	66MHz	2.5x	Off	On	On	On
200MHz	66MHz	3x	Off	On	Off	On
233MHz	66MHz	3.5x	Off	On	Off	Off

CPU SPEED SELECTION (INTEL)
CPU speed	Clock speed	Multiplier	SW2/1	SW2/2	SW2/3	SW2/4
75MHz	50MHz	1.5x	On	On	Off	Off
90MHz	60MHz	1.5x	On	Off	Off	Off
100MHz	66MHz	1.5x	Off	On	Off	Off
120MHz	60MHz	2x	On	Off	On	Off
133MHz	66MHz	2x	Off	On	On	Off
150MHz	60MHz	2.5x	On	Off	On	On
166MHz	66MHz	2.5x	Off	On	On	On
200MHz	66MHz	3x	Off	On	Off	On

CPU SPEED SELECTION (INTEL MMX)
CPU speed	Clock speed	Multiplier	SW2/1	SW2/2	SW2/3	SW2/4
150MHz	60MHz	2.5x	On	Off	On	On
166MHz	66MHz	2.5x	Off	On	On	On
200MHz	66MHz	3x	Off	On	Off	On

CPU TYPE SELECTION
Type	JP7
Single voltage	Closed
Dual voltage	Open

CPU VOLTAGE SELECTION
Voltage	V core	JP43	JP44
3.3v	2.8v	Pins 2 & 3 closed	Pins 2 & 3 closed
3.3v	3.2v	Pins 2 & 3 closed	Pins 1 & 2 closed
3.5v	2.8v	Pins 1 & 2 closed	Pins 2 & 3 closed
3.5v	3.2v	Pins 1 & 2 closed	Pins 1 & 2 closed