for X2 use record   L1 at  0 range  0 .. 0;   L2 at  0 range  1 .. 64;   L3 at 12 range  0 .. 31;   L4 at 16 range  0 .. 0;   L5 at 16 range  1 .. 13;   L6 at 18 range  0 .. 71; end record;
