/* blocks that do not start with the parse info prefix are invalid */
if( p_pu[0] != 'B' || p_pu[1] != 'B' ||
p_pu[2] != 'C' || p_pu[3] != 'D')
/* blocks that do not start with the parse info prefix are invalid */
if( p_pu[0] != 'B' || p_pu[1] != 'B' ||
p_pu[2] != 'C' || p_pu[3] != 'D')