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X Overlay Software
As you saw before, the BIOS needed
to know about the system. One of the factors written in the BIOS
was the CHS information. The challenge arises with the fact that
unless a BIOS is upgradeable, it only knows what it knows.
As hard drives moved up in size, the CHS grew beyond what
the BIOS knew. Either this left the user with a drive
that could not be used to capacity, or it wouldn't install. The solution
is to use overlay software. In simple terms, the overlay software
is written to track 0, and puts on a 'game face' that the BIOS
can understand. The software than does CHS translation
that the drive actually understands.
The challenge with overlay software
is the fact that if it gets corrupted, the drive cannot
be accessed. Given this, the preferable choice is to upgrade
the BIOS. If you must use overlay software, be
sure to make a floppy that has the Operating System and
the overlay software. At least this is a good idea if you want
to see the data on that drive after the corruption
of the overlay software.
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CertiGuide to A+ (Core Hardware) (http://www.CertiGuide.com/aplush/) on CertiGuide.com
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