DFI KM400A-MLV User Manual page 66

3
BIOS Setup
IDE DMA Transfer Access
This field, when Enabled, will enhance the IDE DMA transfer of
an IDE hard disk drive.
OnChip IDE Channel0 and OnChip IDE Channel1
These fields allow you to enable or disable the primary and sec-
ondary IDE controller. The default is Enabled. Select Disabled if
you want to add a different hard drive controller.
IDE Prefetch Mode
This allows data and addresses to be stored in the internal buffer
of the chip, thus reducing access time. Enable this field to achieve
better performance.
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 com-
plete task by themselves. Your system supports five modes, 0 (de-
fault) to 4, which primarily differ in timing. When Auto is selected,
the BIOS will select the best available mode after checking your
drive.
Auto
Mode 0-4
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
Disabled
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The BIOS will automatically set the system ac-
cording to your hard disk drive's timing.
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.
The BIOS will automatically detect the settings
for you.
The BIOS will not detect these categories.