MBR_BS_NEWMBR
needed |= MBR_BS_NEWMBR; /* need new bootsel code */
if ( ! (boot->mbr_bootsel.mbrbs_flags & MBR_BS_NEWMBR)) {
boot->mbr_bootsel.mbrbs_flags &= ~MBR_BS_NEWMBR;
fl |= MBR_BS_NEWMBR;