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Member "syslinux-6.03/diag/mbr/README" (6 Oct 2014, 713 Bytes) of package /linux/misc/syslinux-6.03.tar.gz:

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    1 Diagnostic MBR/VBR files
    3 handoff.bin	Show the data that the BIOS/MBR hands off to an MBR/VBR.
    6   +++ USAGE +++
    8 NOTE: in the examples, mbr.bin, /dev/hda and /dev/hda1 are used as generic representations.
   10 Writing out an MBR is straight forward (it is assumed below that /dev/hda is the target raw device and /dev/hda1 is the target partition):
   12   dd conv=notrunc bs=440 count=1 if=mbr.bin of=/dev/hda
   14 Writing a VBR to match Syslinux requires more work as it must have a jump and be offset into the partition (and as a result the code must be compatible with this offset):
   16   echo -en "\0353\0130\0220" |dd conv=notrunc bs=1 count=3 of=/dev/hda1
   17   dd conv=notrunc bs=2 count=210 seek=45 if=mbr.bin of=/dev/hda1