61
Large Mode
Large mode is the extended HDD access mode supported by the
G586IPV system boards. Some IDE HDDs have more than 1024 cylin-
ders without LBA support (in some cases, you may not want the LBA
mode). These system boards provide another alternative to support
these kinds of HDDs.
The BIOS tells the operating system that the number of cylinders is half
of the actual number and that the number of heads is double the actual
number. During disk access, the reverse conversion is done by the
INT13h routine.
Example of Large mode:
CYLS. HEADS SECTORS MODE
1120
16
59
NORMAL
560
32
59
LARGE
Maximum HDD size:
no. Cylinders
(1024)
x no. Heads
( 32)
x no. Sectors
( 63)
x bytes per sector
( 512)
1 gigabyte
Note:
To support LBA or Large mode, address translation software is included
in the Award BIOS HDD Service Routine (INT13h). If you are running
an operating system that bypasses the BIOS Int13 Service Routine,
LBA and Large Mode may fail.
