Contec SPI-8451-LVA - Manual (Page 97)

8. BIOS Setup
90
SPI-8451-LLVA, SPI-8452-LLVA, SPI-8451-LVA
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
four IDE UDMA fields (for each of up to four IDE
devices that the internal PCI IDE interface supports),
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 two IDE channels. Select
Enabled to activate each channel separately.
IDE Secondary Master/Slave PIO
The four IDE PIO (Programmed Input/Output) fields
let you set a PIO mode (0-4) for each of the four IDE
devices that the onboard IDE interface supports.
Modes 0 through 4 provide successively increased
performance. In Auto mode, the system
automatically determines the best mode for each
device.
IDE Secondary 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
four IDE UDMA fields (for each of up to four IDE
devices that the internal PCI IDE interface supports),
the system automatically determines the optimal data
transfer rate for each IDE device.
USB Controller
Select Enabled if your system contains a Universal
Serial Bus (USB) controller and you have USB
peripherals.