ATI Technologies FIRE GL1 User's Guide download pdf (Page 48)

Digital Display

Also called TTL. A type of monitor that switches signals ON or OFF to determine

display color. Types of digital displays include the IBM Enhanced Color Display or

Monochrome Display.

Digitize

Process of turning an analog signal into digital data.

Digitizer

Input device in the CAD area, used for scanning printed graphics or drawings, i.e.

converting them to digital computer graphics.

Direct3D

3D software interface (3D-API) from Microsoft for Windows 95 and Windows NT.

Uses DirectDraw.

DirectColor

Generic term for TrueColor, RealColor and HiColor. Color information is passed

directly to the D/A converter instead of being translated by a look-up table.

Therefore full color information must be saved for each pixel.

DirectX

Interactive media technologies for Windows 95 and Windows NT. Allows the

development of high-performance interactive applications by extending to the

developers the full performance of the underlying hardware. Includes the

DirectDraw, Direct3D, DirectSound, DirectInput, and DirectPlay APIs.

Dither

Process of representing a color by mixing dots of closely related colors.

DMA

Direct memory access, a method of data transfer where information is transferred

directly between system components without the help of the CPU.

Double buffering

Also called page flipping. The display buffer has double size. The next image can be

drawn in the part of the display buffer that is invisible at first. When it is ready, this

part will be displayed, and in the other part the next image will be prepared. With

this technique animations and games look more realistic than with a simple single

buffer.

DPMS

Display Power Management Signaling; VESA standard which allows energy saving

operation of monitors.

DRAM

Dynamic Random Access Memory, memory for read and write operations which is

non-permanent.

Driver

Part of a software program that interacts with a particular piece of equipment in

your computer system (i.e. video boards, printers, and keyboards). Drivers are often

loaded by your config.sys at system boot.

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ATI Technologies FIRE GL1 User's Guide Page 48