add.asm

来自「这是8051F020的一些基本实验程序」· 汇编 代码 · 共 26 行

DATA0 EQU 12H
DATA1 EQU 34H
DATA2 EQU 56H
DATA3 EQU 78H
ORG 0000H
AJMP 100H
ORG 0100H
MOV 40H,#DATA0
MOV 41H,#DATA1   ;被加数送41H,40H
MOV 50H,#DATA2
MOV 51H,#DATA3   ;加数送51H,50H
MOV A,40H
ADD A,50H         ;(40H)+(50H) →A
DA A
MOV 50H,A         ;保存结果
MOV A,41H
ADDC A,51H         ;(41H)+(51H)+CY→A
DA A
MOV 51H,A          ;保存结果
MOV 52H,#0
MOV A,#0
ADDC A,52H
MOV 52H,A          ;进位52H
LOOP0:AJMP LOOP0
END