Asus AP2500 Manuale di riferimento hardware - Pagina 40

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III. Appendix

Peripherals

Peripherals are components on the outside of the computer such as a moni-

tor, printer, keyboard, or mouse. Peripherals are attached to the computer

via I/O ports. Peripheral devices allow your computer to perform an almost

limitless variety of specialized tasks.

POST (Power On Self Test)

When you turn on the computer, it will first run through the POST, a series

of software-controlled diagnostic tests. The POST checks system memory,

the motherboard circuitry, the display, the keyboard, the diskette drive, CPU,

and other I/O devices.

PS/2 Port

PS/2 ports are based on IBM's Micro Channel Architecture. This type of

architecture transfers data through a 16-bit or 32-bit bus. A PS/2 mouse and/

or keyboard may be used on ATX motherboards.

RAID (Redundant Array of Inexpensive Disks)

RAID can be set up to provide mirroring (for fault tolerance), parity (for

data guarding), or striping (for data distribution over several drives for in-

creased performance). A RAID card is required to setup a RAID system.

RAM (Random Access Memory)

There are several different types of RAM such as DRAM (Dynamic RAM),

EDO DRAM (Extended Data Out DRAM), SDRAM (Synchronous DRAM).

ROM (Read Only Memory)

ROM is nonvolatile memory used to store permanent programs (called firm-

ware) used in certain computer components. Flash ROM (or EEPROM) can

be reprogrammed with new programs (or BIOS).

SCSI (Small Computer System Interface)

High speed parallel interface defined by the X3T9.2 committee of the Ameri-

can National Standards Institute (ANSI) for connecting many peripheral

devices.

UPS (Uninterruptible Power Supply)

A battery system that can provide power to an electronic device or com-

puter when power fails in the building. A passive UPS only provides power.

An active UPS provides power conditioning that offers protection against

transient power conditions and short-term power outages.

AP2500 Hardware Reference Guide