DFI AM636-B User Manual
Page 70
70
3
BIOS Setup
Primary Master/Slave PIO to 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 select-
ed, 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 to 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.