EFA P5V580 VP3, Manual, Page: 48 / 55

AWARD BIOS Description
3 - 16
LARGE mode
Some IDE HDDs contain more than 1024 cylinder without LBA support (in
some cases, user do not want LBA). The Award BIOS provides another
alternative to support these kinds of HDD.
BIOS tricks DOS (or other OS) that the number of cylinders is less than 1024 by
dividing it by 2. At the same time, the number of heads is multiplied by 2. A
reverse transformation process will be made inside INT13h in order to access the
right HDD address.
Auto detect
If using Auto detect, the BIOS will automatically detect IDE hard disk mode
and set it to one kind of HDD modes.
3.11.3 Remark
To support LBA or LARGE mode of HDDs, there must be some software
involved which are located in Award HDD Service Routine
(INT13h).It maybe fail to access a HDD with LBA (LARGE) mode
selected if you are running under an Operating System which replaces the
whole INT 13h.
3.12 Power - On Boot
If you have made all the changes to CMOS values and the system can not boot with
the CMOS values selected in Setup, restart the system by turning it OFF then ON
or press the “RESET” button on the system case. You may also restart the system
by simultaneously pressing < Ctrl >, < Alt > and < Del > keys.