20 	I1 = P3;
22 	P3 = R1;                  /* P3 = From Address */  define
41 	I0 = P3;
63 	P3 = I0;                  /* Amend P3 to updated ptr. */  define
65 	P3 = I1;  define
69 .Lbyte2_s:   R1 = B[P3++](Z);
72 .Lfinished:  P3 = I1;
78 	P3 = P3 + P2;  define
79 	R1 = B[P3--] (Z);
88 .Lol_e:    R1 = B[P3--] (Z);
90 	P3 = I1;  define