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Programmed input/output (PIO) is a method of transferring data between the CPU and a peripheral such as a network adapter or an ATA storage device.
In general, programmed I/O happens when software running on the CPU uses instructions that access I/O address space to perform data transfers to or from an I/O device. This is contrast to Direct Memory Access (DMA) transfers.
The best known example of a PC device that uses programmed I/O is the ATA interface; however, this interface can also be operated in any of several DMA modes. Many older devices in a PC also use PIO, including legacy serial ports, legacy parallel ports when not in ECP mode, the PS/2 keyboard and mouse ports, legacy MIDI and joystick ports, the interval timer, and older network interfaces.
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∙ 14y ago
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since input or output device are usually much slower than the processor it is proper to discuss input or output transfer rate without considering the speed of input or output device?
NO
Is a graphic tablet output or input?
Input device.
Is an OMR an input or output?
is an omr and input or output device?
Is a touchpad an input device or an output device?
It is an input device.
Is micr a output device?
The full form of MICR is Magnetis Ink Character Reader.
Is interactive whiteboard an input or output device?
both input r output
Is bus an input device?
absolutely not , bus is just a data transfer media, we can't say it as input or output device
Is CD or DVD an input or output device?
it is input
IS A MOTOR AN OUTPUT OR AN INPUT DEVICE?
The monitor is an output device......
Is an scanner an input or output device?
A scanner is an input device because it sends (or 'inputs') information to the computer.
Is webcam a input or output device?
Webcam is a Input Device
Is a keypad an input or output device?
A keypad is an input device.
