programmed I/O
[ˈproʊɡræmd ˌaɪ ˈoʊ]
noun
entrada/saída programada
1. A data transfer method in which the CPU directly controls the transfer of data between a peripheral device and memory by executing I/O instructions
The system uses programmed I/O to manage data transfer between the hard disk and RAM.
O sistema utiliza entrada/saída programada para gerenciar a transferência de dados entre o disco rígido e a RAM.
2. A synchronous I/O technique where the processor must wait for each I/O operation to complete before proceeding to the next instruction
Programmed I/O is slower than interrupt-driven I/O because the CPU must actively poll the device status.
A entrada/saída programada é mais lenta que a entrada/saída orientada por interrupção porque a CPU deve investigar ativamente o status do dispositivo.
This is a technical computing term primarily used in computer architecture, embedded systems, and electrical engineering contexts. It is universally understood in both Brazilian and American academic and professional computing environments. The term is essential in discussions about system performance and I/O optimization strategies in microprocessor design.
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