2.2.2多字节无符号数减法.txt

本人保存经典的51程序

MOV  	R0, #30H			
MOV  	R1, #10H			
MOV  	R7,#3			
CLR  	C 				
LOOP:     	
MOV  	A, @R0			
SUBB 	A, @R1			
MOV  	@R1, A			
INC  	R0				
INC  	R1
DJNZ  	R7, LOOP      
RET