Acer M1640, M5640 manual Pio, Udma, Ide Dma

The following table describes the parameters found in this menu.

Parameter	Description	Options
IDE	The four IDE PIO fields let you set a PIO mode (0-4)
Primary/Second	for each of the four IDE devices that the onboard IDE
ary	interface supports. Modes 0 through 4 provide
Master/Slave	increased performance. In Auto mode, the system
PIO	automatically determines the best mode for each
	device.
On-Chip IDE	The Chipset contains a PCI IDE interface with support	[Enabled],
First/Second	for two IDE channels. Select Enabled to activate the	[Disabled]
Channel	first and/or second IDE interface. Select Disabled to
	deactivate an interface, if you install a primary and/or
	secondary add-in IDE interface.
IDE	UDMA (Ultra DMA) is a DMA data transfer protocol
Primary/Second	that utilized ATA transfer protocol that utilizes ATA
ary	commands and the ATA bus to allow DMA commands
Master/Slave	to transfer data ata maximum burst rate of 33 MB/s.
UDMA	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.
IDE DMA	This category allows you to enable or disable DMA	[Enabled],
Transfer Access	transfer access of IDE device (or IDE HDD)	[Disabled]
SATA 1/2	Enable/Disable Serial-ATA 1 or Serial-ATA-2. SATA 1
	control port 1 and 3, SATA 2 control port 2 and 4.
IDE Prefetch	The onboard IDE drive interfaces supports IDE
Mode	prefetching, for faster drive accesses. If you install a
	primary and/or secondary add-in IDE interface, set this
	field to Disabled if the interface does not support
	prefetching.

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