Added sample boot sector code
Added sample boot sector code

melanj/my-spare-time-work,melanj/my-spare-time-work,melanj/my-spare-time-work,melanj/my-spare-time-work,melanj/my-spare-time-work,melanj/my-spare-time-work,melanj/my-spare-time-work,melanj/my-spare-time-work,melanj/my-spare-time-work