43 	I1 = P3;
45 	P3 = R1;                  /* P3 = From Address */  define
64 	I0 = P3;
86 	P3 = I0;                  /* Ammend P3 to updated ptr. */  define
88 	P3 = I1;  define
92 .Lbyte2_s:   R1 = B[P3++](Z);
95 .Lfinished:  P3 = I1;
101 	P3 = P3 + P2;  define
102 	R1 = B[P3--] (Z);
111 .Lol_e:    R1 = B[P3--] (Z);
113 	P3 = I1;  define