1.将自己定义的字符串显示到屏幕上

DATA   SEGMENT A DB '123ABC'
DATA   ENDS
CODE   SEGMENTASSUME CS:CODE,DS:DATA
START: MOV AX,DATAMOV DS,AXLEA BX,AMOV CX,6LP: MOV AH,2 // 功能号2送给AH，单字符显示输出的子功能 MOV AL,[BX] XCHG AL,DL //入口参数 INC BXINT 21H //系统功能调用，INT中断 LOOP LP //loop cx次 MOV AH,4CHINT 21H
CODE   ENDSENDS START

DATA   SEGMENT TABLE DW 3400H,5600H,2300H,4500H,2300H
DATA   ENDS
CODE   SEGMENTASSUME CS:CODE,DS:DATA
START: MOV AX,DATAMOV DS,AXMOV BX,OFFSET TABLEMOV SI,06HA: JMP DWORD PTR[BX+SI+2] //32位的存储器操作数 段间间接转移 基址+变+相 
程序执行完标号为A的指令后：
CS=？1200H
IP=？2300H

DSEG   SEGMENT MESS DB 'please input string:',0DH,0AH,'$'BUFF DB 20,?,20 Dup(?)DATA DB 20 Dup(?) 
DSEG   ENDSCSEG   SEGMENTASSUME CS:CSEG,DS:DSEG,ES:DSEG
START: MOV AX,DSEGMOV DS,AXMOV ES,AX
AGAIN: LEA DX,MESSMOV AH,9INT 21HLEA DX,BUFFMOV AH,10INT 21H //我们敲入的是从第三个开始 ,buff+2XOR CX,CXMOV CL,BUFF+1//串传送指令LEA DI,DATALEA SI,BUFF+2CLD//从左到右REP MOVSB//无条件重复前缀
CODE ENDSENDS START 

4.求从TABLE开始的10个无符号字节数的和，结果放SUM字单元中

DATA   SEGMENT 
TABLE DB 12H,23H,34H,45H,56HDB 67H,78H,89H,9AH,0FDH
SUM DW ?
DATA   ENDS
;
CODE   SEGMENTASSUME CS:CODE,DS:DATA,ES:DATA
START: MOV AX,DATAMOV DS,AXMOV ES,AXLEA SI,TABLEMOV CX,10XOR AX,AX
NEXT:  ADD AL,[SI]ADC AH,0INC SILOOP NEXTMOV SUM,AXHLT
CODE   ENDSENDS START

5. 例4-17

DSEG   SEGMENT 
TABLE DB 0,1,4,9,16,25,36,49,64,81,100,121,144,169,196,255
DATA DB ?
RESULT DB ?
DSEG   ENDS
;
SSEG SEGMENT STACK 'STACK'
DB 100 DUP(?)
SSEG ENDS
;
CSEG   SEGMENTASSUME CS:CSEG,DS:DSEG,ES:SSEG
BEGIN: MOV AX,DSEGMOV DS,AXMOV AX,SSEGMOV SS,AXLEA BX,TABLEMOV AH,0MOV AL,DATAADD BX,AXMOV AL,[BX]MOV RESULT,ALMOV AH,4CHINT 21H
DSEG ENDSENDS BEGIN