FILTER5:
CLR		A
MOV	R3,A
MOV 	R4,A 
MOV	R7,N				
MOV	R2,ADDPH			
MOV 	R1,ADDPL
MOV	 DPTR,#QAVTAB
QAVFT1:
MOVC   	A,@A+DPTR
MOV    	B,A
MOVX   	A,@R1
INC    	DPTR				
INC    	R1					
MUL    	AB
ADD    	A,R4
MOV    	R4,A
MOV    	A,B
ADDC   	A,R3					
MOV    	R3,A
DJNZ   	R7,QAVFT1
MOV    	A,R4
JNB    	ACC.7,QAVFT2			
INC    	R3
QAVFT2:
MOV    	A,R3					
RET
QAVTAB:
DB