Dell 2100/180, 2100/200 manual Tft, Tsr, Umb, Ups, Usoc, Vac, Vcci, Vdc, Vde

which video, mouse, and keyboard drivers are installed for Windows.

Running the Control Panel or Windows Setup program may change options in the system.ini file. On other occa- sions, you may need to change or add options to the system.ini file manually with a text editor, such as Notepad.

terminator

Some devices, especially disk drives, contain a terminator to absorb and dissipate excess current. When more than one such device is connected in a series, you may need to remove the terminator—or change a jumper setting to dis- able it—unless it is the last device in the series. However, some devices have terminators that should never be re- moved or disabled.

text editor

An application program for editing text files consisting exclusively of ASCII characters. MS-DOS Editor and Notepad (in Windows) are text editors, for example. Most word processors use proprietary file formats containing binary characters, although some can read and write text files.

text mode

See video mode.

TFT

Abbreviation for thin film transistor. A flat-panel display for notebook computers where each pixel is controlled by one to four transistors.

tpi

Abbreviation for tracks per inch.

TSR

Abbreviation for terminate-and-stay-resident. A TSR pro- gram runs “in the background.” Most TSR programs implement a predefined key combination (sometimes re- ferred to as a “hot key”) that allows you to activate the TSR program’s interface while running another MS-DOS pro- gram. When you finish using the TSR program, you can return to the other application program and leave the TSR program resident in memory for later use.

Because MS-DOS is not designed to support multiple pro- grams running simultaneously, TSR programs can sometimes cause memory conflicts. When troubleshoot- ing, rule out the possibility of such a conflict by rebooting your computer without starting any TSR programs.

TV

Abbreviation for television.

UL

Abbreviation for Underwriters Laboratories.

UMB

Abbreviation for upper memory blocks. See also conven- tional memory, HMA, memory manager, and upper memory area.

upper memory area

The 384 KB of RAM located between 640 KB and 1 MB. If the computer has an Intel386 or higher microprocessor, a software utility called a memory manager can create UMBs in the upper memory area, in which you can load device drivers and memory-resident programs. See also conventional mem- ory, HMA, and memory manager.

UPS

Abbreviation for uninterruptible power supply. A battery- powered unit that automatically supplies power to your computer in the event of an electrical failure.

USOC

Abbreviation for Universal Service Ordering Code.

utility

A program used to manage system resources— memory, disk drives, or printers, for example. The diskcopy com- mand for duplicating diskettes and the himem.sys device driver for managing extended memory are utilities included in MS-DOS.

V

Abbreviation for volt(s).

VAC

Abbreviation for volt(s) alternating current.

VCCI

Abbreviation for Voluntary Control Council for Interference.

VDC

Abbreviation for volt(s) direct current.

VDE

Abbreviation for Verband Deutscher Elektrotechniker.

162 Dell PowerEdge 2100/180 and 2100/200 Systems User’s Guide