HEXTOBCDD: 
CLR 	A          			
MOV 	R3,A 
MOV 	R4,A 
MOV 	R5,A 
MOV 	R2,#10H    			
HB3: 
MOV 	A,R7  			
RLC 	A 
MOV 	R7,A 
MOV 	A,R6 
RLC 	A 
MOV 	R6,A 
MOV 	A,R5 				
ADDC 	A,R5 
DA 		A				
MOV 	R5,A 
MOV 	A,R4 
ADDC 	A,R4 
DA 		A 
MOV 	R4,A 
MOV 	A,R3 
ADDC 	A,R3 
MOV 	R3,A 				
DJNZ 	R2,HB3 				
RET