DOS

The Disk Operating System that controls the computer’s input and output functions. See Operating system.

Double-density

A type of diskette format that allows you to store twice as much data as the standard-density format. A 5¼-inch double-density diskette can store 360KB of data. A 3½-inch double-density diskette can store 720KB of data.

Drive identifier

The letter name of a disk drive, followed by a colon-for example, c : .

EGA

Enhanced Graphics Adapter. A type of adapter that allows you to display high-resolution graphics on a color monitor. It can display up to 43 lines of text with 80 characters on each line, or it can display monochrome or 16-color graphics at up to 640 x 350 resolution.

Executable file

A file containing program instructions, as opposed to data created with an application program. An executable file has the extension

.BAT, .COM, or .EXE.

Execution speed

The speed at which the central processing unit can execute commands. Also called operating speed. The Equity 386 can run at 8 MHz or 20 MHz.

Expanded memory

Memory above 1MB that can be made available to certain MS-DOS application programs via LIM EMS 4.0.

Extended memory

Memory above 1MB that is not available to MS-DOS application programs. Extended memory can be used for the disk caching program, HDCACHE. See the description of HDCACHE in your MS-DOS Reference Manual.

6 Glossary