PIO mode


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PIO mode

(Programmed Input/Output mode) The data transfer mode used by earlier IDE drives. The PIO mode used the CPU's registers for data transfer in contrast with DMA, which transfers directly between main memory and the peripheral device. See IDE.


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Compatible with PIO modes 0 - 6, Multiword DMA modes 0 - 4, and Ultra DMA modes 0 - 6.
The device is a drop-in replacement for IDE/ATA hard drives that supports PIO modes 0-2, allowing burst read/write rates of up to 8.3 MB per second, and sustained read and write rates of 2.5 MB per second and 1.2 MB per second, respectively.