Contec BX-100n-DC5000-C01, User Manual, Page: 86 / 145

5. BIOS Setup
BX-100n User’s manual
79
Description Choice
IDE Primary Master / Slave PIO
The two IDE PIO (Programmed Input/Output) fields let you
set a PIO mode (0-4) for the one IDE device that the onboard
IDE interface supports. In Auto mode, the system
automatically determines the best mode for the device.
IDE Primary Master/Slave UDMA
UDMA (Ultra DMA) is a DMA data transfer protocol that
utilizes ATA commands and the ATA bus to allow DMA
commands to transfer data at a maximum burst rate of 33
MB/s. When you select Auto in the two IDE UDMA fields,
the system automatically determines the optimal data
transfer rate for each IDE device.