DFI 748-AL User Manual page 65

Internal PCI/IDE
This field allows you to enable or disable the primary and sec-
ondary IDE controller.
Both Allows you to configure
Slave PIO, IDE Secondary Master/Slave PIO, Pri-
mar y Master/Slave UltraDMA and Secondar y
Master/Slave UltraDMA fields.
Disabled Select this option if you want to use a different
hard drive controller.
Primary Allows you to configure the
Slave PIO and Primary Master/Slave UltraDMA
fields.
Secondary Allows you to configure the
ter/Slave PIO and Secondar y Master/Slave
UltraDMA fields.
IDE Primary Master/Slave PIO and IDE 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 The BIOS will automatically set the system ac-
cording 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.
BIOS Setup
the IDE Primary Master/
IDE Primary Master/
IDE Secondary Mas-
3
65