Intel i915G User Manual page 41

BIOS
IDE HDD Block Mode
IDE Block Mode allows the controller to access blocks of sectors rather than a
single sector at a time. The default is Enabled.
Options: Enabled, Disabled.
IDE DMA transfer access
Automatic data transfer between system memory and IDE device with minimum CPU
intervention. This improves data throughput and frees CPU to perform other tasks.
Options: Enabled, Disabled.
On-Chip Primary (Secondary) PCI IDE
The mainboard supports two channel of ordinary IDE interface. Select "Enabled"
to activate each channel separately.
Note: If you do not use the onboard IDE connector, set the Onboard Primary
(Secondary) PCI IDE to "Disabled".
IDE Primary/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
to 4 provide successively increased performance. In Auto mode, the system
automatically determines the best mode for each device.
Options: Auto, Mode 0 ~ 4.
IDE Primary/Secondary Master/Slave UDMA
Select the mode of operation for the IDE drive. Ultra DMA-33/66/100 implementa-
tion is possible only if your IDE hard drive supports it and the operating environ-
ment includes a DMA driver. If your hard drive and your system software both
support Ultra DMA-33/66/100, select Auto to enable UDMA mode by BIOS.
Options: Auto, Disabled.
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