5. BIOS Setup
56
IPC-BX955 User’s manual
Description
Choice
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.
On-Chip Secondary PCI IDE
The integrated peripheral controller contains an IDE
interface with support for 2 IDE channels. Select Enabled to
activate each channel separately.
IDE Secondary 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.