input/output port, porta de entrada/saída

n. A channel through which data is transferred between an input or output device and the processor. The port appears to the CPU as one or more memory addresses that it can use to send or receive data. Specialized hardware, such as in an add-on circuit board, places data from the device in the memory addresses and sends data from the memory addresses to the device. Ports may also be dedicated solely to input or to output.
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