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Acer V12LC-2X Motherboard

Jumper and Connector Layout

V12LC-2X Motherboard Diagram

Note - The blackened pin of a jumper represents pin 1.

CPU configurations

JCPU SpeedJP8JP14JP18
P751-41-21-2
P902-51-21-2
P1003-61-21-2
P1202-52-31-2
P1333-62-31-2
P150*2-52-32-3
P1663-62-32-3

*BIOS version R04-E7 is required for 150MHz Pentium operation for systems with the Cirrus Logic GD5440 chipset. BIOS version R04-E8 is required for 150MHz Pentium operation for systems with the Cirrus Logic GD5434 chipset.

Jumper Settings

JumperSettingFunction
JP11-2*
2-3
For models with Acer BIOS
For models with OEM BIOS
JP2 Password1-2
2-3*
Check password
Bypass password
JP3 BIOS ROMOpen
1-2
2-3*
SST29EE010 BIOS ROM only
EPROM BIOS ROM
Flash ROM (Intel 28F010, 28F001, 28F101)
JP6 Onboard I/O1-2
2-3*
Disable onboard SMC665/669
Enable onboard SMC665/669
JP8 CPU clock frequency1-4
2-5*
3-6
50 MHz clock freq (Pentium 75 MHz)
60 MHz clock freq (Pentium 90/120/150 MHz)
66 MHz (Pentium 100/133 MHz)
JP12 CPU Type1-2*
2-3
Intel P54C or AMD K5 CPU
Cyrix M1 CPU
JP13 CPU Voltage1-2*
2-3
3.3825V for VR and standard CPU type
3.5250V for VRE CPU type
JP14, JP18 CPU Clock Ratio
1-2, 1-2*
2-3, 1-2
1-2, 2-3
2-3, 2-3
Intel P54C   M1 and K5
3/2 3/2, 2/2, 3/1
2/11/1
3/13/2, 2/2, 3/1
5/21/1
JP15 Reset Switch1-2
2-3*
For suspend mode function
For reset function
JP16, JP17 CN1 Function1-2*
2-3
Feature connector
I2C interface
JP19 HD LED Open*LED flashes whenever it detects disk activity
Note: Keep JP19 open.
JP20 Intel 28F001 1-2
2-3*
Programming boot block (for AFlash util use)
Normal (programming all other blocks)

Connector Functions

ConnectorFunction
CN1VGA feature connector
CN2PCI IDE channel 1
CN3PCI IDE channel 2
CN4Diskette drive connector
CN5Power connector
CN6Multifunction connector
CN7Multifunction connector
CN8Hard disk LED connector
CN9Reserved
CN10Feature socket for multimedia or Ethernet card

Multifunction connector CN6

This connector accommodates the front panel connectors for speaker, LEDs, keylock, reset, and turbo. Figure 1-3 shows the CN6 pin assignments for each of the front panel connectors.
 
Multi Function Connector

Cache

The V12LC-II ships with 0KB or 256KB 2nd Level Cache, and is not upgradeable.

Memory

Memory type : 72-Pin, 70ns, Non-Parity Fast Page Mode SIMMS with gold tips. Maximum : 128MB


Video Memory

Larger video memory allows you to display more colors* at higher resolutions. The system board comes with 1-MB video memory onboard upgradable to 2 MB. Order the video upgrade kit from Acer Access P/N 91.AA319.001.

*800x600x16 million colors is not available when video memory is upgraded to 2 MB on CL-5430 and CL-5440 chipsets.