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Troubleshooting The “USB Wakeup function” does not work. . When “USB Sleep and Charge function” is Enabled in the BIOS Setup, the “USB Wakeup function” does not work for ports that support the USB Sleep and Charge function. In that case, use a USB port that does not have the USB Sleep and Charge function-compatible icon or disable the “USB Sleep and Charge function” in BIOS Setup. Glossary TECHNICAL NOTE: Some features defined in this glossary may not be available on your computer. Acronyms The following acronyms may appear in this user’s guide. AC alternating current BIOS basic input/output system bps bits per second CD compact disc CD-ROM compact disc read-only memory CD-RW compact disc rewrite memory CMOS complementary metal-oxide semiconductor COM1 communications port 1 (serial port) COM2 communications port 2 (serial port) CPU central processing unit DC direct current DMA direct memory access DIMM dual inline memory module 217 Glossary 218 DOS disk operating system DPI dots per inch DSTN dual supertwist nematic DVD digital versatile (or video) disc DVD-ROM digital versatile (or video) disc read-only memory ECP enhanced capabilities port EPROM erasable programmable read-only memory FAT file allocation table FCC Federal Communications Commission GB gigabyte HDD hard disk drive HTML Hypertext Markup Language IEEE Institute of Electrical and Electronics Engineers I/O input/output IRQ interrupt request ISP Internet service provider KB kilobyte LAN local area network LCD liquid crystal display LPT1 line printer port 1 (parallel port) LSI large-scale integration MB megabyte MIDI Musical Instrument Digital Interface PC personal computer PCI Peripheral Component Interconnect PCMCIA Personal Computer Memory Card International Association RAM random access memory RFI radio frequency interference ROM read-only memory RTC real-time clock SCSI small computer system interface Glossary 219 Terms A B SDRAM synchronous dynamic random access memory SRAM static random access memory SVGA super video graphics adapter TFT thin film transistor USB universal serial bus URL uniform resource locator WAN wide area network www World Wide Web The following terms may appear in this user’s guide. active-matrix display — A liquid crystal display (LCD) made from an array of liquid crystal cells using active-matrix technology. Also known as a “TFT display,” in its simplest form there is one thin film transistor (TFT) for each cell. This type of display works well with notebook computers because of its shallow depth and high-quality color. Active-matrix displays are viewable from wider angles than most passive-matrix displays. adapter — A device that provides a compatible connection between two units. For example, the computer’s internal display adapter receives information from the software and translates it into images on the screen. An adapter can take a number of forms, from a microprocessor to a simple connector. An intelligent adapter (one that is capable of doing some processing) may also be called a controller. alternating current (AC) — The type of power usually supplied to residential and commercial wall outlets. AC reverses its direction at regular intervals. Compare direct current (DC). application — A computer program that you use to perform tasks of a specific type. Applications include word processors, spreadsheets, and database management systems. See also program. backup — A copy of a file, usually on a removable disk, kept in case the original file is lost or damaged. basic input/output system (BIOS) — See BIOS. Glossary 220 baud rate — The speed at which a communication device, such as a printer or modem, transmits information. Baud rate is the number of signal changes per second (not necessarily the same as bits per second). See also bits per second. BIOS (basic input/output system) — Basic instructions, stored in read- only memory (ROM), containing the information the computer needs to check hardware and load the operating system when you start up the computer. bits per second (bps) — A way of measuring the speed at which information is passed between two devices. This is the basic unit of measure used in modem communications, and is similar, but not identical, to the baud rate. See also baud rate. boot — To start the computer. The term “boot” originates from bootstrap program (as in “pulling itself up by its bootstraps”), a program that loads and initializes the operating system. See also reboot. boot disk — See system disk. boot priority (startup sequence) — The order in which the computer accesses its disk drives to locate the startup files. Under the default startup sequence, the computer looks for the startup files in the diskette drive before checking the hard disk. bus — An electrical circuit that connects the central processing unit (CPU) with other parts of the computer, such as the video adapter, disk drives, and ports. It is the pathway through which data flows from one device to another. See also bus spee...

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