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DMA

Direct memory access. A capability of some bus architectures that enables a bus controller to transfer data directly between a device (such as a disc drive) and a device with physically addressable memory, such as that on a computer’s motherboard. The microprocessor is freed from involvement with the data transfer, thus speeding up overall computer operation. See also bus master.

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Part of Speech: noun
Synonym(s):
Blossary:
Industry/Domain: Software; Computer
Category: Operating systems
Company: Apple
Product: Mac OS X
Acronym-Abbreviation:

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Related terms

DMA coprocessor

Semiconductors; Digital Signal Processors (DSP)

A peripheral that transfers the contents of memory locations independently of the processor (except for initialization).

DMA mode

Semiconductors; Digital Signal Processors (DSP)

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Engineering; Electronic engineering

The transfer of data from a computer memory to some other location, without the intervention of the central processing unit (CPU).

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Automation; Industrial automation

The process of one intelligent device accessing the memory of another, bypassing the other processor’s general registers.

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To emphasize displayed characters, as by displaying them in reverse video (light on dark rather than dark on light, and vice versa) or against a colored background.

active

Software; Operating systems

Pertaining to the device, program, file, record or portion of the screen that is currently operational or subject to command operations.

cross hatch

Software; Operating systems

Shading made up of regularly spaced, intersecting lines.

default gateway

Software; Operating systems

A configuration item for the TCP/IP protocol that is the IP address of a directly reachable IP router. Configuring a default gateway creates a default route in the IP routing ...

compile

Software; Operating systems

To translate all the source code of a program from a high-level language into object code prior to execution of the program.

header row

Software; Operating systems

The first row in a spreadsheet. The header row contains category labels that describe the contents of the columns.

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