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V12LC

ACER, INC.

V12LC

Device Type

Mainboard

Processor

CX M1/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

Acer

Dimensions

330mm x 218mm

I/O Options

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

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

C1

Power LED & keylock

CN6/pins 1 - 5

Parallel port

C2

Speaker

CN6/pins 7 - 10

Serial port 2

C3

Turbo LED

CN6/pins 12 & 13

Serial port 1

C4

Turbo switch

CN6/pins 15 - 17

PS/2 mouse port

C5

Reset switch

CN6/pins 19 & 20

Ethernet 10BaseT connector

C6

Power LED & keylock

CN7/pins 1 - 4

VGA feature connector

CN1

Reset switch

CN7/pins 6 & 7

IDE interface 1

CN2

IDE interface LED

CN8

IDE interface 2

CN3

Network/multimedia interface

CN10

Floppy drive interface

CN4

Riser slot

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

CN9

Unidentified

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 type select flash

JP3

Pins 2 & 3 closed

 

BIOS type select EPROM

JP3

Pins 1 & 2 closed

On board I/O enabled

JP6

Pins 2 & 3 closed

 

On board I/O disabled

JP6

Pins 1 & 2 closed

Reset function

JP15

Pins 2 & 3 closed

 

Suspend mode function

JP15

Pins 1 & 2 closed

Detects hard drive access only

JP19

Open

 

Detects hard drives & floppy drive accesses

JP19

Closed

Flash BIOS write protect disabled

JP20

Pins 2 & 3 closed

 

Flash BIOS write protect enabled

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

SIMM CONFIGURATION (CON'T)

Size

Bank 0

Bank 1

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

Size

Bank 0

256KB

(8) 32K x 8

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 TYPE SELECTION

Type

JP12

AM K5

Pins 1 & 2 closed

CX M1

Pins 2 & 3 closed

Intel

Pins 1 & 2 closed

CPU MULTIPLIER SELECTION (CX M1)

Multiplier

JP14

JP18

1.5x, 2x, 3x

Pins 1 & 2 closed

Pins 1 & 2 closed

1x

Pins 2 & 3 closed

Pins 1 & 2 closed

1.5x, 2x, 3x

Pins 1 & 2 closed

Pins 2 & 3 closed

1x

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU MULTIPLIER SELECTION (AM K5)

Multiplier

JP14

JP18

1.5x, 2x, 3x

Pins 1 & 2 closed

Pins 1 & 2 closed

1x

Pins 2 & 3 closed

Pins 1 & 2 closed

1.5x, 2x, 3x

Pins 1 & 2 closed

Pins 2 & 3 closed

1x

Pins 2 & 3 closed

Pins 2 & 3 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

3x

Pins 1 & 2 closed

Pins 2 & 3 closed

2.5x

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU VOLTAGE SELECTION

Voltage

JP13

3.3v

Pins 1 & 2 closed

 

3.5v

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