EIHD_L_HDRBLKCNT
hbcnt = (header[EIHD_L_HDRBLKCNT+3]*0x1000000 +
header[EIHD_L_HDRBLKCNT+2]*0x10000 +
header[EIHD_L_HDRBLKCNT+1]*0x100 +
header[EIHD_L_HDRBLKCNT]);