28 #define start	r7  macro
49 		start = isrc;  define
60 		tmp1 = memb(start++#1);
65 		P1 = cmp.gtu(end,start);
66 		mod8 = and(start,#7);
80 		dbuf = memd(start);
81 		obo = add(start,#1);
88 		P0 = cmp.gtu(end,start);
98 		if (!P0.new) start = add(obo,tmp1);
101 		start = add(start,#8);  define
110 		start = add(obo,tmp1);  define
115 		R0 = sub(start,isrc);