Boot Sector Layout                              

        00h   3 BYTEs   Jump Command
        03h   8 BYTEs   OEM Name & Version
        0Bh     WORD    Bytes per Sector
        0Dh     BYTE    Sectors per Cluster
        0Eh     WORD    Number of Reserved Sectors
        10h     BYTE    Number of FATs
        11h     WORD    Entries in Root Dir
        13h     WORD    Sectors in Volume
        15h     BYTE    Media Descriptor
        16h     WORD    Sectors per FAT
        18h     WORD    Sectors per Track
        1Ah     WORD    Number of Heads
        1Ch     WORD    Number of Hidden Sectors
        1Eh             Boot Routine


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