ƬÄÚRAM50H-59H´ÓС-´óÅÅÐò

 QUE£º	CLR 00H
	MOV R3£¬#9H
	MOV R0£¬#50H
	MOV A£¬@R0
   L2:	INC R0
	MOV R2,A
	SUBB A,@R0
	MOV A,R2
	JC L1
	SETB 00H
	XCH A,@R0
	INC R0
   L1:	MOV A,@R0
	DJNZ R3,L2
	JB 00H,QUE
	RET