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What is PIO?
Published  07/2/2011 | Computer Encyclopedia Page 2 | Unrated
What is PIO?
Programmed Input Output mode of data transfer is the mode of data transfer that requires the CPU’s intervention (in contrast to DMA and UDMA). Older optical drives still use this mode. There are many versions of PIO mode, with the latest being version 4, which offers a maximum speed of 16.7 Megabytes per second.
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