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V12LC-2

ACER, INC.

V12LC-2

Device Type

Mainboard

Processor

CX 6X86/AM K5/Pentium

Processor Speed

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

Chip Set

Unidentified

Video Chip Set

Cirrus Logic

Maximum Onboard Memory

128MB

Maximum Video Memory

2MB

Cache

256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options (backplane)

bus mouse port, Ethernet 10BaseT connector, floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse interface, PS/2 keyboard interface, serial ports (2), VGA feature connector, VGA port, riser slot

CONNECTIONS

Purpose

Location

Purpose

Location

VGA feature connector

CN1

IDE interface LED

CN8

IDE interface 1

CN2

Network/multimedia interface

CN10

IDE interface 2

CN3

VGA port

CN27

Floppy drive interface

CN4

Parallel port

CN28

Power LED & keylock

CN6/pins 1 - 5

Serial port 2

CN29

Speaker

CN6/pins 7 - 10

Serial port 1

CN30

Turbo LED

CN6/pins 12 & 13

PS/2 mouse interface

CN31

Turbo switch

CN6/pins 15 - 17

PS/2 keyboard interface

CN32

Reset switch

CN6/pins 19 & 20

RJ-45 phone jack

CN33

Power LED & keylock

CN7/pins 1 - 4

Riser slot

SL1

Reset switch

CN7/pins 6 & 7

 

 

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

CN9

Reserved

BIOS type select Acer

JP1

Pins 1 & 2 closed

 

BIOS type select OEM

JP1

Pins 2 & 3 closed

Password disabled

JP2

Pins 2 & 3 closed

 

Password enabled

JP2

Pins 1 & 2 closed

BIOS ROM type select flash ROM

JP3

Pins 2 & 3 closed

 

BIOS ROM type select EPROM

JP3

Pins 1 & 2 closed

Onboard SMC665/669 enabled

JP6

Pins 2 & 3 closed

 

Onboard SMC665/669 disabled

JP6

Pins 1 & 2 closed

CPU type select P54C or AMD K5

JP12

Pins 1 & 2 closed

 

CPU type select Cyrix M1

JP12

Pins 2 & 3 closed

Reset function

JP15

Pins 2 & 3 closed

 

Suspend mode function

JP15

Pins 1 & 2 closed

Factory configured - do not alter

JP19

Open

Flash ROM control select normal work

JP20

Pins 2 & 3 closed

 

Flash ROM control select boot block

JP20

Pins 1 & 2 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

CACHE CONFIGURATION

Note: Cache configuration is unidentified.

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

Speed

JP8

75MHz

Pins 1 & 4 closed

90MHz

Pins 2 & 5 closed

100MHz

Pins 3 & 6 closed

120MHz

Pins 2 & 5 closed

133MHz

Pins 3 & 6 closed

150MHz

Pins 2 & 5 closed

CPU MULTIPLIER SELECTION (INTEL)

Multiplier

JP14

JP18

1.5x

Pins 1 & 2 closed

Pins 1 & 2 closed

2x

Pins 2 & 3 closed

Pins 1 & 2 closed

2.5x

Pins 2 & 3 closed

Pins 2 & 3 closed

3x

Pins 1 & 2 closed

Pins 2 & 3 closed

CPU MULTIPLIER SELECTION (CX 6X86 & AM K5)

Multiplier

JP14

JP18

1x, 1.5x, 3x

Pins 1 & 2 closed

Pins 1 & 2 closed

1x

Pins 2 & 3 closed

Pins 1 & 2 closed

1x, 1.5x, 3x

Pins 1 & 2 closed

Pins 2 & 3 closed

1x

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU VOLTAGE SELECTION

Voltage

JP13

3.3825v

Pins 1 & 2 closed

3.5250v

Pins 2 & 3 closed

CN1 CONNECTOR SELECTION

Setting

JP16

JP17

Feature connector

Pins 1 & 2 closed

Pins 1 & 2 closed

I2C connector

Pins 2 & 3 closed

Pins 2 & 3 closed