MASM6.15汇编程序例子

/***************通过调用（INT 21H）表中的01h号功能号从键盘输入一个字符并回显到视频显示器上*****************/

DATAS SEGMENT

;此处输入数据段代码

DATAS ENDS

STACKS SEGMENT

;此处输入堆栈段代码

STACKS ENDS

CODES SEGMENT

ASSUME CS:CODES,DS:DATAS,SS:STACKS

START:

MOV AX,DATAS

MOV DS,AX

;此处输入代码段代码

MOV AH,

INT 21H

MOV AH,4CH

INT 21H

MOV AH,4CH

INT 21H

CODES ENDS

END START

/***************输入姓名学号换行显示*****************/

DATA SEGMENT
STRING DB 'xingming',0DH,0AH,'xuehao','$'
DATA ENDS
CODE SEGMENT
ASSUME CS:CODE,DS:DATA
BEGIN:
MOV AX,DATA
MOV DS,AX
MOV AH,09H
LEA DX,STRING
INT 21H
MOV AH,4CH
INT 21H
CODE ENDS
END BEGIN

/***************输入一个字母显示下一个字母*****************/

Code  Segment
   Assume CS:Code,DS:Code
KBEsc       equ  1BH
PromptStr  DB     'Please input a letter(Esc to exit): $'
Start:   push cs
   pop  ds ;使数据段与代码段同段

Begin:   lea  dx,PromptStr
   mov  ah,
   int  21h
   mov  ah,
   int  21h
   cmp  al,KBEsc
   jz  Exit_Proc
   mov  cx,
   mov  dl,al
   mov  ah,
Disp_Chr: inc  dl
   int  21h
   loop Disp_Chr
   mov  dl,
   int  21h
   mov  dl,
   int  21h
   jmp  Begin

Exit_Proc: mov  ah,4ch ;结束程序
   int  21h
Code  ENDS
   END   Start ;编译到此结束

/***************8位16进制加法*****************/

DATA SEGMENT
STRING DB 'The result of 13579BDFH + 02468ACEH is:','$'
XL DW 9BDFH
XH DW 1357H
YL DW 8ACEH
YH DW 0246H
DATA ENDS
CODE SEGMENT
ASSUME CS:CODE,DS:DATA
START: MOV AX,DATA
MOV DS,AX
MOV DX,OFFSET STRING ;显示信息
MOV AH,09H
INT 21H
MOV AX,XL
ADD AX,YL ;Y低位数值与X低位数值相加
MOV BX,AX ;BX中存放结果的低16位
MOV AX,XH
ADC AX,YH ;Y高位数值与X高位数值相加
MOV CX,AX ;CX中存放结果的高16位
;显示结果
MOV DH,CH
CALL SHOW
MOV DH,CL
CALL SHOW
MOV DH,BH
CALL SHOW
MOV DH,BL
CALL SHOW
MOV AX,4C00H
INT 21H
SHOW PROC NEAR
PUSH DX
PUSH AX
MOV AL,DH
AND AL,0F0H
MOV DL,CL;必须把cl暂存dl里，否则下次对clcall show时会把cl变为4，而不是原来存的数
MOV CL,
SHR AL,CL
MOV CL,DL
CMP AL,0AH
JB C2
ADD AL,07H
C2: ADD AL,30H
MOV DL,AL;show character
MOV AH,02H
INT 21H
MOV AL,DH
AND AL,0FH;取低4位
CMP AL,0AH
JB C3
ADD AL,07H
C3: ADD AL,30H
MOV DL,AL;show character
MOV AH,02H
INT 21H
POP AX
POP DX
RET
SHOW ENDP
CODE ENDS
END START