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Direct memory access

A technology that allows certain devices, such as hard discs and CD or DVD drives, to transfer information directly through the computer's memory without using the computer's processor. DMA improves the performance of the device and frees the computer's processor so it can perform other tasks.

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Related terms

direct memory access (DMA)
Engineering; Electronic engineering

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

direct memory access (DMA)
Automation; Industrial automation

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

direct memory access (DMA)
Software; Globalization software service

The transfer of data between memory and an input/output device without processor intervention.

direct memory access (DMA)
Semiconductors; Digital Signal Processors (DSP)

A mechanism whereby a device other than the host processor contends for, and receives, mastery of the memory bus so that data transfers can take place independent of the host.

direct memory access (DMA)
Entertainment; Video

Method of gaining direct access to main storage in order to perform data transfers without involving the CPU.

direct memory access
Computer; Operating systems

A technology that allows certain devices, such as hard disks and CD or DVD drives, to transfer information directly through the computer's memory without using the computer's ...

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