MCS－51单片机应用开发实用子程序.zip

				FINDS2:
				MOV    	DPL,R1						
				MOV    	DPH,R0
				MOV    	A,R7
				JZ     	FINDS21
				INC    	R6							
				FINDS21:
				MOVX   	A,@DPTR
				INC    	DPTR						
				CLR    	C							
				SUBB   	A,R4
				JNZ    	FINDS22
				MOVX   	A,@DPTR
				SUBB   	A,R3
				JNZ    	FINDS22
				MOV    	A,DPL
				CLR    	C							
				SUBB   	A,#01H
				MOV    	R1,A						
				MOV    	A,DPH
				SUBB   	A,#00H
				MOV    	R0,A
				CLR    	A
				RET
				FINDS22:
				DJNZ   	R7,FINDS21
				DJNZ   	R6,FINDS21
				MOV    	A,#0FFH
				RET