MCS－51单片机应用开发实用子程序.rar

				DV31: 
				CLR 	C 
				MOV 	A,R3 
				SUBB 	A,R7 
				JC 	DV30 
				SETB	OV 					
				RET 
				DV30:
				MOV 	R2,#10H 				
				DM23:
				CLR	C 
				MOV 	A,R5 
				RLC 	A 
				MOV 	R5,A 
				MOV 	A,R4 
				RLC 	A 
				MOV 	R4,A 
				MOV 	A,R3 
				RLC 	A 
				MOV 	R3,A 
				MOV	F0,C 
				CLR	C 
				SUBB 	A,R7 
				ANL 	C,/F0 
				JC 	DM24 
				MOV 	R3,A 
				INC	R5 
				DM24:
				DJNZ	R2,DM23 
				MOV 	A,R3 					
				ADD 	A,R3 
				JC 	DM25 
				SUBB 	A,R7 
				JC 	DM26 
				DM25: 
				INC 	R5 
				MOV 	A,R5 
				JNZ 	DM26 
				INC 	R4 
				DM26: 
				CLR 	OV 
				RET