Lucky Star 6P2BX2, Руководство пользователя

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3. Large Mode:
Extended HDD access mode supported by Award® software. 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 large mode:
Cyls. Head Sector Mode
1120 16 59 NORMAL
560 32 59 LARGE
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 int 12h in order to access the
right HDD address the right HDD address!
4. Maximum HDD Size:
No. Cylinder (1024)
X No. Head (32)
X No. Sector (63)
X No. Bytes Per Sector (512)
1 GB
To support LBA or large mode of HDDs, there must be some softwares
involved. All these softwares are located in the Award® HDD service routine
(int 13h). It may be failed to access a HDD with LBA (large) mode selected if
you are running under an perating system which replaces the whole int 13h. Unix
operating systems do not support either LBA or large and must utility the
standard mode. Unix can support drives larger than 528MB.