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V12LC-1

ACER, INC.

V12LC-1

Device Type

Mainboard

Processor

Pentium

Processor Speed

75/90/100MHz

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

RJ-45 ethernet port

CN1

Network/multimedia interface

CN11

PS/2 mouse port

CN3

CPU fan connector

CN12

Serial port 1

CN4

Hard disk LED connector

CN13

Serial port 2

CN5

Hard disk LED connector

CN14

Parallel port

CN6

LED connector

CN15

VGA port

CN7

LED connector

CN16

Floppy drive interface

CN8

VGA feature connector

CN17

IDE interface 2

CN9

Riser slot

SL1

IDE interface 1

CN10

 

 

USER CONFIGURABLE SETTINGS

Function

Label

Position

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 1 & 2 closed

 

BIOS ROM type select EPROM

JP3

Pins 2 & 3 closed

Onboard SMC665 enabled

JP6

Pins 2 & 3 closed

 

Onboard SMC665 disabled

JP6

Pins 1 & 2 closed

Onboard GD543x enabled

JP7

Pins 2 & 3 closed

 

Onboard GD543x disabled

JP7

Pins 1 & 2 closed

Enhanced IDE enabled

JP9

Pins 2 & 3 closed

 

Enhanced IDE disabled

JP9

Pins 1 & 2 closed

M1451 delay disabled

JP11

Pins 1 & 2 closed

 

M1451 delay enabled

JP11

Pins 2 & 3 closed

Reset function enabled

JP15

Pins 2 & 3 closed

 

SMM function enabled

JP15

Pins 1 & 2 closed

Factory configured - do not alter

JP16

Reserved

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: The 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

PARALLEL PORT DMA SELECTION

Setting

JP4

JP5

DMA1

Pins 1 & 2 closed

Pins 1 & 2 closed

DMA3

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU SPEED SELECTION

Speed

JP8

75MHz

Pins 1 & 4 closed

90MHz

Pins 2 & 5 closed

100MHz

Pins 3 & 6 closed

CPU TYPE SELECTION

Type

JP12

Intel

Pins 1 & 2 closed

Cyrix M1

Pins 2 & 3 closed

CPU MULTIPLIER SELECTION

Multiplier

JP14

1.5x

Pins 1 & 2 closed

2x

Pins 2 & 3 closed

CPU VOLTAGE SELECTION

Voltage

JP13

3.3825v

Pins 1 & 2 closed

3.5250v

Pins 2 & 3 closed