My Bootloader Does Not Work: Difference between revisions

Unfortunately, the BIOS is poorly standardized{{how}} leading to various and sometimes poorly written implementations. Because of this BIOS specific situations can arise that will cause it not to load a bootloader. As an example some BIOSes may require a valid partition table to exist at byte address 0x1BE of the storage device. This is very common in the compatibility mode of UEFI machines, as the reference implementation attempts to parse the partition table before branching between the compatibility and UEFI modes. Furthermore, if you use older hardware for testing, the BIOS may not support INT 13h extensions - most notably LBA support.