ICOP Technology ICOP-602X User Manual page 45

n 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 does not want LBA). The Award BIOS provides
another alternative to support these kinds of HDD!
Example of LARGE mode:
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!
Maximum HDD size:
ICOP Embedede 386SX CPU ISA Half Size SBC User's Manual
x no. Sector
x bytes per sector
CYLS HEADS
1120 16
560 32
no. Cylinder
x no. Head
x no. Sector
x bytes per sector
(
(
814 Gigabytes
SECTOR MODE
59 NORMAL
59
( 1024)
(
(
(
63)
512)
LARGE
32)
63)
512)
1 Gigabytes
41