Aaeon SBC-670S Manual page 44

Set this option to Enabled to instruct AMIBIOS to boot quickly
when the computer is powered on. This option replaces the old
Above 1 MB Memory Test Advanced Setup option.
Setting
Disabled
Enabled
This option sets the sequence of boot drives (floppy drive A:, hard
disk drive C:, or CD-ROM drive) that the AMIBIOS attempts to
boot from after AMIBIOS POST completes.
Set this option to Off to turn the Num Lock key off when the
computer is booted so you can use the arrow keys on both the
numeric keypad and the keyboard. The settings are On or Off.
Description
AMIBIOS test all system memory. AMIBIOS waits up
to 40 seconds for a READY signal from the IDE hard
disk drive. AMIBIOS waits for .5 seconds after
sending a RESET signal to the IDE drive to allow the
IDE drive time to get ready again. AMIBIOS checks
for a <Del> key press and runs AMIBIOS Setup if
the key has been pressed.
AMIBIOS does not test system memory above 1 MB.
AMIBIOS does not wait up to 40 seconds for a
READY signal from the IDE hard disk drive. If a
READY signal is not received immediately from the
IDE drive, AMIBIOS does not configure that drive.
AMIBIOS does not wait for .5 seconds after sending
a RESET signal to the IDE drive to allow the IDE
drive time to get ready again.
You cannot run AMIBIOS Setup at system boot,
because there is no delay for the Hit <Del> to run
Setup message.