Flashcard FC586713
Which technique transfers data blocks between an I/O device and memory without the CPU transferring each byte?
Questões Interdisciplinares de Inglês
Instituto AOCP · 2018
Which technique transfers data blocks between an I/O device and memory without the CPU transferring each byte?
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Resposta
Direct memory access allows a controller to move blocks of data directly between an I/O device and memory without the CPU transferring each byte.• Initial setup: The CPU configures the controller with source and destination addresses, transfer size and mode before the operation starts.
• Block transfer: The controller performs the data transfer independently, freeing the CPU for other tasks.
• Completion interrupt: The controller signals the CPU via an interrupt at the end of the transfer to avoid continuous polling.
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