 Acer File Extensions |
Acer V55LA-2 Motherboard
Jumper and Connector Layout
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. Also support for Cyrix M1/M2 and AMD K5/K6 CPUs.
- 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 or GT (Rage II) PCI graphics adapter.
- ALI 1523B E-IDE and I/O controller
- Plug and Play support.
- Power management features (device standby, global standby).
- USB support.
CPU Jumper Settings
| SW2 Settings | ||||
|---|---|---|---|---|
| CPU Freq, | 1 | 2 | 3 | 4 |
| Intel Pentium | ||||
| 75 MHz | ON | ON | OFF | OFF |
| 90 MHz | ON | OFF | OFF | OFF |
| 100 MHz | OFF | ON | OFF | OFF |
| 120 MHz | ON | OFF | ON | OFF |
| 133 MHz | OFF | ON | ON | OFF |
| 150 MHz | ON | OFF | ON | ON |
| 166 MHz | OFF | ON | ON | ON |
| 200MHz | OFF | ON | OFF | ON |
| NBSet JP43 and JP44 2-3. For P54C set JP7 Closed, for P55C (MMX) set JP7 Open | ||||
| Cyrix/IBM M1 | ||||
| Cyrix/IBM P120+ | ON | ON | ON | OFF |
| Cyrix/IBM P150+ | ON | OFF | ON | OFF |
| Cyrix/IBM P166+ | OFF | ON | ON | OFF |
| NB Set JP43 and JP44 2-3. For 6x86 set JP7 Closed, for 6x86L set JP7 Open | ||||
| Cyrix M2 | ||||
| Cyrix M2 PR166 | OFF | ON | ON | ON |
| Cyrix M2 PR180 | ON | OFF | OFF | ON |
| Cyrix M2 PR200 | OFF | ON | OFF | ON |
| NB Set JP43 and P44 2-3, JP7 Open | ||||
| AMD K5 | ||||
| PR75 | ON | ON | OFF | OFF |
| PR90 | ON | OFF | OFF | OFF |
| PR100 | OFF | ON | OFF | OFF |
| PR120 | ON | OFF | ON | OFF |
| PR133 | OFF | ON | ON | OFF |
| PR166 | OFF | ON | ON | ON |
| NBSet JP43 1-2, JP44 2-3, JP7 Closed | ||||
| AMD K6 | ||||
| PR166 | OFF | ON | ON | ON |
| PR200 | OFF | ON | OFF | ON |
| PR233 | OFF | ON | OFF | OFF |
| NBSet JP43 2-3, JP44 1-2, JP7 Open | ||||
SW2 Settings
| Switch | Setting | Function |
|---|---|---|
| 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
| Jumper | Setting | Function |
|---|---|---|
| JP1 BIOS Type | 1-2 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 |
| JP7 Regulator | Closed 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 Funct as additional reset switch conn |
| JP16 Software Shutdown | 1-2 2-3 | UPS enabled UPS disabled |
| 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
| Connector | Function |
|---|---|
| CN3 | Power connector |
| CN5 | USB Connector |
| CN7 | PS/2 keyboard connector |
| CN8 | PS/2 mouse connector |
| CN10 | Diskette drive connector |
| CN11 | IDE connector 2 |
| CN12 | IDE connector 1 |
| CN13 | Serial port 1 |
| CN14 | Serial port 2 |
| CN17 | Parallel port |
| CN18 | CPU fan connector |
| CN21 | Video port |
| CN23 | ATI multimedia connector (AMC) |
| CN30 | Reset switch connector (pins 1-2) |
| JP10 | Hard disk and diskette drive LED connector |
| JP14 | Power-on switch connector (pins 1-2) |
| JP15 | Standby power connector |
| JP30 | External 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. |
 |
Memory
Memory Module : 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