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 V55LA Motherboard

Jumper and Connector Layout

V55LA Motherboard Diagram

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

Specification

The V55LA system has the following features -

  • ZIF socket 7 for an Intel Pentium 75/90/100/120/133/150/166/200MHz including MMX.
  • Four 72-pin SIMM sockets that support 4/8/16/32-MB 60/70ns fast page mode or EDO SIMMS.
  • 256K pipeline-burst second level cache onboard which is not upgradeable.
  • 1-MB video memory plus upgrade sockets for a further 1-MB (some systems shipped with the 1-MB upgrade fitted). The chips needed for the upgrade are - 2 of 514260ASL 256Kb x 16 70ns SOJ.
  • 128K BIOS which is APM and Year 2000 compliant.
  • Two Enhanced IDE interfaces supporting a total of four devices including hard drives and CDROMs.
  • External ports.
    • PS/2 keyboard and mouse ports.
    • Two high-speed (NS16C550 compatible) serial ports.
    • One ECP/EPP high-speed parallel port.
    • VGA port.
  • Onboard chipsets.
    • Aladdin III system chipset (equivalent to Intel Triton II).
    • ATI Mach64 VT PCI graphics adapter.
    • CMD 0646 E-IDE controller.
    • SMC 93X I/O controller.
  • Plug and Play support.
  • Power management features (device standby, global standby).

CPU Jumper Settings

CPU Freq,1234
Intel 75 MHzONONOFFOFF
Intel 90 MHzONOFFOFFOFF
Intel 100 MHzOFFONOFFOFF
Intel 120 MHzONOFFONOFF
Intel 133 MHzOFFONONOFF
Intel 150 MHzONOFFONON
Intel 166 MHzOFFONONON
Intel 200MHzOFFONOFFON
Cyrix/IBM 6x86 P120+ONONONOFF
Cyrix/IBM 6x86 P150+ONOFFONOFF
NB For Intel MMX processors set JP7 Open, JP43 and JP44 2-3

SW2 Settings

SwitchSettingFunction
CPU Clock Frequency
Switches 1, 2
ON, ON
ON, OFF
OFF, ON
75/50 MHz
90/60, 120/60, 150/60 MHz
100/66, 133/66, 166/66, 200/66 MHz
CPU Frequency Ratio
Switches 3, 4

ON, ON
OFF, OFF
ON, OFF
OFF, ON
Intel  M1  K5

5/2   1/1   2/1
3/2   3/1  3/2
2/1   2/1   -
3/1   4/1   -

Sound Feature Switch 5 ON
OFF
Onboard sound chip disabled
Onboard sound chip enabled
Password Security Switch 6 ON
OFF
Password bypass
Password check

Jumper Settings

JumperSettingFunction
JP1 BIOS Type1-2
2-3
For models with Acer BIOS
For models with OEM BIOS
JP2 LED Function 1-2
2-3
LED for IDE and FDD
LED for IDE only
JP3, JP4 Second-level Cache 1-2, 1-2
1-2, 2-3
2-3, 2-3
256 KB
512 KB
1 MB
JP5 Flash BIOS fn (Intel 28F001 only)1-2
2-3
Allows boot block programming
Normal operation
JP6 BIOS ROM Type
1-2
2-3
Open
Flash ROM (28F010)
EPROM
Block Flash EEPROM (SST 29EE010)
JP7 RegulatorClosed
Open
For CPUs using one voltage (P54C)
For CPUs using two voltages (P55C)
JP11 SMM/Reset Switch 1-2
2-3
3-4
Supports SMM switch
Supports reset switch
Functions as additional reset switch conn
JP16 Software Shutdown1-2
2-3
UPS enabled
UPS disabled
JP42 L2 Cache Mode1-2
2-3
Intel or M1 "1+4" mode
M1 linear burst mode
CPU Voltage
JP43 (for I/O)

JP44 (for core)

1-2
2-3

1-2
2-3

3.5V
3.3V

2.5V
2.8V

Connector Functions

ConnectorFunction
CN3Power connector
CN5USB Connector
CN7PS/2 keyboard connector
CN8PS/2 mouse connector
CN10Diskette drive connector
CN11IDE connector 2
CN12IDE connector 1
CN13Serial port 1
CN14Serial port 2
CN17Parallel port
CN18CPU fan connector
CN21Video port
CN23ATI multimedia connector (AMC)
CN30Reset switch connector (pins 1-2)
JP9Hard disk and power LED connector (Fujitsu)
JP10Hard disk and diskette drive LED connector
JP14Power-on switch connector (pins 1-2)
JP15Standby power connector
JP30External battery connector

The multifunction connector CN19 accommodates the front panel connectors for speaker, LEDs, keylock, reset, and turbo. Figure below shows the pin assignments for each connector.
 
Multi Function Connector

Memory

Module description : 72pin EDO 60 or 70ns Maximum : 128MB


Video RAM Upgrade

Video Memory can be upgraded from 1MB to 2MB by inserting 2 of 514260ASL 256Kb x 16 70ns SOJ in sockets U3, U4