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BIOS Setup
OnChip IDE Channel0 and OnChip IDE Channel1
These fields allow you to enable or disable the primary and second-
ary IDE controller. The default is Enabled. Select Disabled if you want
to add a different hard drive controller.
Primary Master/Slave PIO and Secondary Master/Slave PIO
PIO means Programmed Input/Output. Rather than have the BIOS
issue a series of commands to effect a transfer to or from the disk
drive, PIO allows the BIOS to tell the controller what it wants and
then let the controller and the CPU perform the complete task by
themselves. Your system supports five modes, 0 (default) to 4, which
primarily differ in timing. When Auto is selected, the BIOS will select
the best available mode after checking your drive.
Auto The BIOS will automatically set the system according
to your hard disk drive’s timing.
Mode 0-4 You can select a mode that matches your hard disk
drive’s timing. Caution: Do not use the wrong setting
or you will have drive errors.
Primary Master/Slave UDMA and Secondary Master/Slave UDMA
These fields allow you to set the Ultra DMA in use. When Auto is
selected, the BIOS will select the best available option after checking
your hard drive or CD-ROM.
Auto The BIOS will automatically detect the settings for
you.
Disabled The BIOS will not detect these categories.
IDE DMA Transfer Access
This field is used to enable or disable the DMA transfer function of
an IDE hard drive.
Serial-ATA 1
This field is used to enable or disable the first channel (SATA 1 and
SATA 2) of the Serial ATA supported by the NVIDIA nForce 4
chipset.
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