Table of Contents
Advertisement
The AWARD BIOS supports three HDD modes: NORMAL, LBA and LARGE.
NORMAL mode : This is a Generic Access mode in which neither the BIOS nor the IDE
controller will make any transformation during the accession. The maximum HDD size
is supported by the NORMAL mode that is 528 Megabytes.
LBA mode : This is a Logical Block Addressing mode which is a HDD accessing
method to overcome the 528 Megabytes restriction. The number of cylinders, heads
and sectors that are shown in setup may not be the physical number contained in the
HDD.
During the HDD accessing, the IDE controller will transform the logical address that is
described by the cylinder, head and sector numbers into its own physical address as
contained inside the HDD. The maximum HDD size that is supported by the LBA
mode is 8.4 Gigabytes.
LARGE mode : Some IDE HDD contains more than 1024 cylinders without the LBA
support. This access mode tricks DOS (or other OS) with the number of cylinders that
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
to the right HDD address. The maximum HDD size that is supported by the LARGE
mode is 1 Gigabytes.
Note : 1. To support LBA or LARGE mode, there are software located in the AWARD
HD Service Routine"INT13H".
LARGE modes selected if you are running under an Operating System that
replaces the whole INT13H service routine.
2. Entering incorrect drive specifications will result in a hard disk drive that will
function improperly or no function at all.
Drive A and Drive B : Select the correct specifications for the diskette drive(s) installed
in the computer.
None
360K, 5.25 in
1.2M,
5.25 in
720K, 3.5in
1.44M, 3.5 in
2.88M, 3.5 in
Downloaded from StockCheck.com
No diskette drive installed
5-1/4 inch PC-type standard drive; 360 kilobyte capacity
5-1/4 inch AT-type high-density drive; 1.2 megabyte capacity
3 1-2 inch double-sided drive; 720 kilobyte capacity
3 1-2 inch double-sided drive; 1.44 megabyte capacity
3 1-2 inch double-sided drive; 2.88 megabyte capacity
AP-687VF/F 33
It may fail to access a HDD with LBA or
AWARD BIOS SETUP
Advertisement
Table of Contents
