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AWARD BIOS SETUP
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standard ones. To select or change the configuration, move the cursor to the desired
position and press <Page Up> or <Page Down> to change the option: (1) Press “ Auto”
for IDE HDD auto detection, (2) Press “ User” for user definable, and Press “ None” for
not installed (e.g. SCSI). There are six categories of information that you must enter
for a HDD: “ CYLS” . for (number of cylinders), “ HEADS” for (number of heads),
“ PRECOMP” for (write pre-compensation), “ LANDZ” for (landing zone), “ SECTOR” for
(number of sectors) and ” MODE“ for (Normal, LBA, LARGE and AUTO). The hard disk
vendor‘ s or system manufacturer’ s documentation should provide you with the drive
specifications. For an IDE hard drive, you can set “ TYPE” to “ Auto” or use the “ IDE
HDD AUTO DETECTION” utility in the main program screen to enter the drive
specifications.
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’ s contain 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 the INT13H in
order to access the right HDD address. The maximum HDD size that is supported by the
LARGE mode is 1 Gigabyte.
Note : 1. To support LBA or LARGE mode, there is software located in the AWARD HD
Service Routine“ INT13H” . It may fail to access a HDD with LBA or LARGE
modes selected if you are running under an Operating System that replaces
the whole INT13H service routine.