Chapter 1 System Board - Acer V55LA User Manual

C h a p t e r
1
System Board
The V55LA is a high-performance system board with a 64-bit
architecture. It supports the Intel P54C, P54CTB, P54CS, P54CT, and
P55C CPUs running at 75/90/100/120/133/150/166/200 MHz. It also
supports Cyrix M1 and AMD K5 CPUs. The system board utilizes the
Peripheral Component Interconnect (PCI) local bus architecture that
maximizes the system performance by enabling high-speed
peripherals to match the speed of the microprocessor with its 120 MB
or 132 MB per second transfer rate in burst mode.
The board incorporates a Sound Blaster Pro-compatible audio
subsystem that consists of CD-audio, WaveTable, and fax/modem
line-in interfaces. A standard 1-MB video DRAM comes onboard and
is upgradable up to 2 MB. Two DRAM banks composed of four 72-pin
sockets come with the board to support single- and double-density
SIMMs for a maximum system memory of 128 MB. The SIMM sockets
accommodate both the standard page mode and extended data output
(EDO) type SIMMs. The board supports a standard 256-KB
asynchronous second-level cache. The board also supports a 256-KB
pipeline burst mode cache a manufacturing option.
The system board includes a 188-pin connector for the slot board that
contains the PCI and ISA bus slots. The two onboard PCI-enhanced
IDE interfaces with a zero-wait state and 16.6 MB per second transfer
rate support up to four IDE devices. Onboard I/O interfaces comprise
of two UART 16550 serial ports, a parallel port with ECP/EPP feature,
and PS/2 keyboard and mouse ports.
System Board 1-1