UKT Support logo

Home
What's New
Message Board
Contact Us


Search the Site
powered by FreeFind

Acer
Advent
Amstrad
Apple
Canon
Compaq
CTX
Epson
Hewlett Packard
Mitsubishi/Apricot
Packard Bell
Other Manufact.

File Extensions
Humour
Links
Microsoft
Reference
Scanner Support





 


Acer V12LC Motherboard

Jumper and Connector Layout

V12LC Motherboard Diagram

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


The system board has the following major features:

  • Pentium 75/90/100 MHz CPU in a zero-insertion force (ZIF) socket.
  • Two DRAM banks composed of four 72-pin SIMM sockets that support 4/8/16/32-MB 60/70ns SIMMs
  • 16-KB internal cache and 256-KB write-back second-level cache.
  • 128-KB Flash ROM for system and VGA BIOS.
  • Two PCI enhanced IDE interfaces that support up to four IDE devices.
  • System clock/calendar with 128 bytes CMOS RAM.
  • Cirrus 5430/5434 VGA PCI accelerator that supports up to 2-MB video memory for a resolution up to 1024x768, 256 colors non-interlaced.

Pentium chip configurations

CPU SpeedJP8JP14
P751-41-2
P902-51-2
P1003-61-2
P1202-52-3
P1333-62-3

Jumper Settings

JumperSettingFunction
JP11-2*
2-3
For models with Acer BIOS
For models with OEM BIOS
JP21-2
2-3*
Check password
Bypass password
JP3 BIOS ROM 1-2
2-3*
Flash ROM EPROM BIOS ROM
JP4,JP5 Parallel DMA1-2
2-3
DMA1 using DRQ1 and DACK1#
DMA3 using DRQ3 and DACK3#
JP6 Onboard I/O1-2
2-3*
Disable onboard SMC665
Enable onboard SMC665
JP7 Onboard VGA1-2
2-3*
Disable onboard GD54xx
Enable onboard GD54xx
JP8 CPU clock frequency1-4
2-5*
3­6
50 MHz clock (Pentium 75 MHz)
60 MHz clock (Pentium 90/120 MHz)
66 MHz (Pentium 100/133 MHz)
JP9 Enhanced IDE1-2
2-3*
Disabled
Enabled
JP11
M1451 delay
1-2
2-3
No delay
Delay ADS# by 1 CPU clock cycle
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, CPU Clock Ratio1-2*
2-3
3/2 times clock frequency
2/1 times clock frequency
JP15 Reset Switch1-2
2-3*
For suspend mode function
For reset function

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


Multifunction connector CN6This 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

Memory

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


Cache

The V12LC ships with 256k write-back second-level cache and is not upgradable.

Video Memory

The V12LC-I ships with the Cirrus 5430/5434 VGA PCI accelerator on-board. It supports up to 2 MB video memory for a resolution up to 1024x768x256, non-interlaced. Large video memory allows you to display higher resolutions and more colors*. The system board comes with 1 MB onboard, upgradable to 2 MB.

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