冒泡排序

DATAS SEGMENT
        TIELE DB "-----BUBBLE SORT-----",10,13,"-2016110131S-",10,13,"ARRAY[6]={1,7,9,2,6,5}",10,13,"After:","$"
        BLANK DB " $"
        ARR DW 1,7,9,2,6,5
        CNT EQU $-ARR  
DATAS ENDS

STACKS SEGMENT
        DB 256 DUP()
STACKS ENDS

CODES SEGMENT
        ASSUME CS:CODES,DS:DATAS,SS:STACKS
        
START:  
        MOV AX,DATAS
        MOV DS,AX
        
        MOV AH,09
        MOV DX,OFFSET TIELE     ;打印标题
        INT 21H
        MOV CX,CNT          ;将循环计数器CX设为数组大小
        DEC CX              ;CX--

OUTER:  MOV DI,CX           ;保存CX
        MOV BX,0            ;int BX=0

INNER:  MOV AX,ARR[BX]      
        CMP AX,ARR[BX+2]    ;if(ARR[BX]<ARR[BX+2])
        JGE COUNT           ;>=
        XCHG AX,ARR[BX+2]   
        MOV ARR[BX],AX      ;SWAP(ARR[BX],ARR[BX+2])

COUNT:  ADD BX,2            ;BX+2
        LOOP INNER          ;内层循环
        MOV CX,DI           ;内层循环结束 回复CX
        LOOP OUTER          ;外层熏循环

        CALL DISPA 

        MOV AH,4CH
        INT 21H 
            
;输出数组子程序
;子程序名:DISPA
;变量参数:  CNT(记录数组长度)
;           ARR[](数组)
       
DISPA PROC
SAVE:   PUSH CX                 ;保存寄存器
        PUSH DX
        
        MOV CX,CNT-5
        MOV DI,-2
    
DISPL:  ADD DI,2                ;DI++
        MOV DX,ARR[DI]          ;输出ARR[DI]
        ADD DL,30H
        MOV AH,02H
        INT 21H
        
        MOV AH,09
        MOV DX,OFFSET BLANK     ;打印空格
        INT 21H
        LOOP DISPL
RECOV:  POP DX
        POP CX
        
EXIT:   MOV AH,4CH              ;恢复寄存器
        INT 21H 

DISPA ENDP
CODES ENDS
    END START
    

双精度加法

data segment     
    ;定义数据
    X Db 0001H,0001H
    Y Db 0003H,0001H
    Z Db 0000H,0000H
     
    ;定义字符串

    string DB 'Calculate Result =',13,10,'$'
data ends


code segment
start:             
    mov ax,data
    mov ds,ax

    ;X Y Z加法
    MOV Al,X
    ADD Al,Y
    MOV Z,Al
    

    ;计算结果文字
    LEA DX,STRING
    MOV AH,9
    INT 21H
    
    ;高位加法
    MOV Ah,X+1
    ADC Ah,Y+1
    MOV Z+1,Ah
    
    ;输出高位
    mov dl,z+1
    add dl,30h
    mov ah,02
    int 21h
    
    ;输出小数点
    mov dl,'.'
    mov ah,02
    int 21h
    
    ;输出低位
    mov dl,z
    add dl,30h
    mov ah,02
    int 21h  
    
    ;等待输入    
    mov ah,1
    int 21h

    mov ax,4ch
    int 21h
code ends

end start

串拷贝

;串拷贝 源串位于数据段

DATAS1 SEGMENT
    str1 DB 'HELLO WORLD!$'
DATAS1 ENDS

DATAS2 SEGMENT
    str2 DB 20 dup(?)
DATAS2 ENDS

CODES SEGMENT
    ASSUME CS:CODES,DS:DATAS1,ES:DATAS2
START:
    MOV AX,DATAS1
    MOV DS,AX
    MOV AX,DATAS2
    MOV ES,AX
        
    lea si,str1     ;DS->si
    lea di,str2     ;ES->di
    mov cx,20
    cld
    rep movsb
    
    lea dx,str2
    mov ax,es
    mov ds,ax       ;es->dx?
    MOV AH,9
    INT 21H
    
    MOV AH,4CH
    INT 21H

CODES ENDS
END START

;串拷贝 源串位于附加段
DATAS2 SEGMENT
    str1 DB 'Hello world$'
    str2 DB 20 dup(?)
DATAS2 ENDS

CODES SEGMENT
    ASSUME CS:CODES,ES:DATAS2
START:
    MOV AX,DATAS2
    MOV ES,AX
    
    lea si,str1     ;source -> si
    lea di,str2     ;destination -> di
    mov cx,20
    cld
    rep movs es:byte ptr[di],es:[si]
    
    lea dx,str2
    ;DONT KNOW WHAT
    ;消除乱码？
    mov ax,es
    mov ds,ax
    ;OUTPUT
    MOV AH,9
    INT 21H
    
    MOV AH,4CH
    INT 21H

CODES ENDS
    END START