Locking Shift Introducer

The locking shift introducer (LSI) is a prefix for locking-shift N right (LS N R) control sequences. Its rank is 144 decimal (90 hexadecimal). In hexadecimal, the byte following the LSI is 20 hexadecimal greater than the corresponding SS N character.   

LS N R indicates that subsequent bytes in the range 160 to 255 decimal (A0 to FF hexadecimal) represent characters in the supplementary graphic character set. A locking shift remains in effect until another locking shift, the end of a field, or the end of a record, whichever comes first. A locking shift has no effect on bytes in the range 0 to 159 decimal (00 to 9F hexadecimal).