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Acer V35LA-N Motherboard

Jumper and Connector Layout

V35 Motherboard Diagram

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

System Information

The V35LA-N is an all-in-one Pentium-based system board that features the common functions offered by a high-performance board. It has a power-management function that conforms to the power-saving standards of the U.S, Environmental Protection Agency (EPA) Energy Star program. It also supports the Plug-and-Play feature. The board utilizes a Pentium processor running at 75/50, 90/60, 100/66, 120/60, 133/66, 150/60, 166/66, or 200/66 MHz. It has one riser card slot for future expansion. It also has four 72-pin SIMM sockets that allow memory upgrade to a maximum of 128 MB, and supports 256-KB/512-KB pipelined-burst second-level cache. Standard features such as two serial ports, one parallel port, a diskette drive interface, and an embedded hard disk interface are also incorporated in the system board. The system is fully compatible with MS-DOS V6.X, OS/2, UNIX, Windows NT and Windows 95 operating systems.

Features -

  • Supports 3.3V Intel Pentium CPU (75/50, 90/60, 100/66, 120/60, 133/66, 150/60, 166/66, 200/66 MHz)
  • 128-MB maximum system memory
  • Four 72-pin SIMM sockets that accept 4-, 8-, 16-, and 32-MB SIMMs, with or without Extended Data Output (EDO) and Error Checking and Correction (ECC) functions
  • 256-KB pipelined-burst second-level cache
  • Integrates an enhanced PCI local bus IDE controller
  • Onboard video and graphics controller and 1-MB VGA memory, upgradable to 2 MB
  • 128-KB Flash ROM for system BIOS
  • One riser card slot
  • Dual 16C550 buffered serial ports and one ECP/EPP parallel port
  • PS/2 mouse and keyboard interface
  • Plug-and-Play function
  • Power-management function

Jumpers & Connectors

Jumpers

JumperSettingFunction
JP21-2*Enable Boot Block Programming
 2-3Normal operation
JP31-2Flash ROM (28F001)
 2-3EPROM
 OPEN*Block Flash EEPROM
JP61-2*Enable Acer BIOS logo
 2-3Enable OEM BIOS logo
JP111-2*Enable SMM switch
 2-3Enable Reset switch
JP13SHORTAssign one regulator for P54C CPU
 OPENAssign two regulators for P55C CPU
JP141-2*Enable P54C shutdown
 2-3Set P55C I/O voltage to 3.3V
JP161-2Enable IDE and FDD LED
 2-3Enable IDE LED only
JP191-2*Enable onboard VGA
 2-3Disable onboard VGA

CPU Core Voltage Select

JP24JP25Vcore
OPEN1-2 or 2-33.52V
2-3 3.3V
OPEN3-42.9V
3-4 2.7V
1-2, 3-4 2.5V


Bus SpeedMultiplierCPU Speed
601.0(1/1)60
661.0(1/1)66
501.5(3/2)75
601.5(3/2)90
661.5(3/2)100
602.0(2/1)120
662.0(2/1)133
602.5(5/2) 150
662.5(5/2) 166
603.0(3/1)180
663.0(3/1)200

Bus Speed / Frequency Select - Switchblock SW1

12Frequency
ONON50 MHz
ONOFF60 MHz
OFFON66 MHz

CPU Core/Clock Ratio Select - Switchblock SW1

34P54CM1K5
ONON5/21/1 
OFFOFF3/23/13/2
ONOFF2/12/11/1
OFFON3/12/14/1

SB/Password Function Select - Switchblock W1

SW Setting 5 and 6

Disable SB or Bypass password 5=ON *, 6=ON *
Enable SB or Check password 5=OFF, 6=OFF

Onboard Connectors

ConnectorFunction
CN4Power connector
CN5Standby control
CN8Keyboard connector
CN9Mouse connector
CN11Diskette drive connector
CN12IDE2 connector
CN13IDE1 connector
CN14COM1 port
CN15COM2 port
CN17Fan power connector
CN18Parallel port
CN19VGA connector
CN21ATI Media channel (AMC) connector
CN25Power LED connector
JP10Power on switch
JP17IDE LED connector

Memory Upgrade

The system memory is expandable to 128 MB by adding single in-line memory modules (SIMMs). The four 72-pin SIMM sockets on board accept single-density (4- and 8-MB) and double-density (16- and 32-MB) SIMMs, with or without EDO and ECC functions, and with 70-ns or less DRAM speed. The ECC function enables the system to automatically detect and correct data errors. As it is a Pentium board, memory must be fitted in pairs, though memory sizes can vary between banks.


Cache Upgrade

The V35LA-N ships with 256KB Pipeline Burst Cache and is not upgradeable.

Upgrade Video Memory

The system board comes with 1 MB of video memory onboard upgradable to 2 MB. Follow these steps to upgrade the video memory:

1. Order the video upgrade kit from Acer Access P/N 91.AA994.001.
2. Shut down your system and remove the power connections.
3. Open the case, remove all peripheral cards, and remove the riser board.
4. Locate the video DRAM upgrade sockets labeled U26 and U27 on the system board.
5. Gently insert the 514260ASL (256K x 16, 70ns SOJ) chips into each of the upgrade sockets.
6. Reverse the steps above to reassemble the system.

Make sure that the pin 1 indicator on the chip matches the notched corner of the socket.