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V55LA

ACER, INC.

V55LA

Device Type

Mainboard

Processor

Pentium/CX 6X86/AM K5

Processor Speed

75/90/100/120/133/150/166/200MHz

Chip Set

Unidentified

Video Chip Set

Unidentified

Maximum Onboard Memory

128MB (EDO & SDRAM supported)

Maximum Video Memory

2MB

Cache

256/512KB

BIOS

Unidentified

Dimensions

254mm x 218mm

I/O Options

Bus mouse port, Ethernet 10BaseT connector, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot, IR connector, line in, wavetable connector, audio in - CD-ROM

CONNECTIONS

Purpose

Location

Purpose

Location

Multimedia/ethernet connector

CN1

Turbo LED

CN19/pins 12 & 13

Audio in - CD-ROM

CN2

Turbo

CN19/pins 15 - 17

LAN connector

CN5

Reset

CN19/pins 19 & 20

Wavetable

CN6

Video port

CN21

PS/2 mouse port

CN8

Fax/modem connector

CN22

Audio I/O board connector

CN9

Reset switch connector

CN30

Floppy drive interface

CN10

Line in

CN31

IDE interface 2

CN11

Power LED & hard disk

JP9

IDE interface 1

CN12

Disk LED

JP10

Serial port 1

CN13

SMM switch

JP11/pins 1 & 2

Serial port 2

CN14

Reset switch

JP11/pins 2 & 3

Parallel port

CN17

Additional reset switch

JP11/pins 3 & 4

CPU fan connector

CN18

Power switch connector

JP14

Power LED & keylock

CN19/pins 1 - 5

Standby power connector

JP15

Speaker

CN19/pins 7 - 10

External battery connector

JP30

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

BIOS type select Acer

JP1

Pins 1 & 2 closed

 

BIOS type select OEM

JP1

Pins 2 & 3 closed

 

LED for IDE/FDD

JP2

Pins 1 & 2 closed

 

LED for IDE only

JP2

Pins 2 & 3 closed

 

Allow boot block programming

JP5

Pins 1 & 2 closed

 

Normal flash BIOS operation

JP5

Pins 2 & 3 closed

 

Regulator 1 voltage

JP7

Closed

 

Regulator 2 voltages

JP7

Open

 

UPS enabled

JP16

Pins 1 & 2 closed

 

UPS disabled

JP16

Pins 2 & 3 closed

Factory configured - do not alter

JP19

Reserved

 

Intel or CX 6X86 "1+4" mode

JP42

Pins 1 & 2 closed

 

CX 6X86 linear burst mode

JP42

Pins 2 & 3 closed

 

Onboard sound chip disabled

SW1/5

On

 

Onboard sound chip enabled

SW1/5

Off

 

Password bypass

SW1/6

On

 

Password check

SW1/6

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

SIMM CONFIGURATION

Size

Bank 0

Bank 1

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

CACHE CONFIGURATION

Size

Tag SRAM

Bank 0

Bank 1

256KB

(2) 32K x 32

(2) 32K x 32

None

512KB

(2) 32K x 32

(2) 32K x 32

(2) 32K x 32

CACHE JUMPER CONFIGURATION

Size

JP3

JP4

256KB

Pins 1 & 2 closed

Pins 1 & 2 closed

512KB

Pins 1 & 2 closed

Pins 2 & 3 closed

1 MB

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

CPU speed

Clock speed

SW1/1

SW1/2

75MHz

50MHz

On

On

90MHz

60MHz

On

Off

100MHz

66MHz

Off

On

120MHz

60MHz

On

Off

133MHz

66MHz

Off

On

150MHz

60MHz

On

Off

166MHz

66MHz

Off

On

200MHz

66MHz

Off

On

CPU FREQUENCY RATIO SELECTION (INTEL)

Ratio

SW1/3

SW1/4

1.5x

Off

On

1.5x

Off

Off

2x

On

Off

2.5x

On

On

CPU FREQUENCY RATIO SELECTION (CX 6X86)

Ratio

SW1/3

SW1/4

4x

Off

On

3x

Off

Off

2x

On

Off

1x

On

On

CPU FREQUENCY RATIO SELECTION (AM K5)

K5

SW1/3

SW1/4

1.5x

Off

Off

2x

On

On

BIOS ROM TYPE SELECTION

Type

JP6

Flash ROM

Pins 1 & 2 closed

EPROM

Pins 2 & 3 closed

Block flash EEPROM

Open

CPU I/O VOLTAGE SELECTION

Voltage

JP43

3.5v

Pins 1 & 2 closed

3.3v

Pins 2 & 3 closed

CPU CORE VOLTAGE SELECTION

Voltage

JP44

2.5v

Pins 1 & 2 closed

2.8v

Pins 2 & 3 closed