3.3.2双字节乘法.txt

MCS－51单片机应用开发实用子程序.zip

DBCDM: 
MOV 	R2,#2 
ADD 	A,R0 				
MOV 	R0,A 
MOV 	R3,#0 				
LOOP: 
DEC 	R0 				
MOV 	A,@R0 				
SWAP 	A 					
MOV 	@R0,A
MOV 	A,R3 
XCHD 	A,@R0
MOV 	R3,A
DJNZ 	R2,LOOP 				
RET