任务一:

1-1

1.DS=076A  SS=076B  CS=076C

2.data =X-2;stack=X-1.

1-2

1. DS=076A ;SS=076B;CS=076C
2. Data =X-2; stack =X-1;

1-3

1.DS=076A ;SS=076C;CS=076E

2.Data =X-4; stack =X-2;

1-4

1. DS=076C;SS=076E;CS=076A
2. Data =X+2; stack =X+4;

1-5

　　1.N

　　2.task1_4可以正常运行

任务二

代码:

assume cs:code
code segment
start:
    mov ax,0b800h
    mov ds,ax
    
    mov bx,0f00h
    mov cx,50h
    mov ax,0403h
s:    mov ds:[bx],ax
    add bx,2
    loop s

    mov ah,4ch
    int 21h
code ends
end start

运行结果:

显示会冒出爱心....

任务三

代码:

 1 assume cs:code
 2 data1 segment
 3     db 50, 48, 50, 50, 0, 48, 49, 0, 48, 49 ; ten numbers
 4 data1 ends
 5 
 6 data2 segment
 7     db 0, 0, 0, 0, 47, 0, 0, 47, 0, 0       ; ten numbers
 8 data2 ends
 9 
10 data3 segment
11     db 16 dup(0)
12 data3 ends
13 
14 code segment
15 start:
16     mov ax,data1
17     mov ds,ax
18     mov bx,0
19     mov cx,0ah
20 s:    mov  ax,ds:[bx]
21     add   ax,ds:[bx+10h]
22     mov ds:[bx+20h],ax
23     inc bx
24     loop s
25     mov ah,4ch
26     int 21h
27 code ends
28 end start

相加前:

 执行后:

任务四

代码:

assume cs:code

data1 segment
    dw 2, 0, 4, 9, 2, 0, 1, 9
data1 ends 

data2 segment
    dw 8 dup(?)
data2 ends

code segment
start:
        mov ax,data1
    mov ds,ax
    mov sp,9
    mov bx,0
    mov cx,8
s1:    push ds:[bx]
    add bx,2
    loop s1

    mov ax,data2
    mov ds,ax
    mov bx,0
    mov cx,8
s2:    pop ds:[bx]
    add bx,2
    loop s2
    
    mov ah, 4ch
    int 21h
code ends
end start

运行前:

执行后:

任务五:

源代码执行后

 左下角被遮住的彩色NUIST

改为 db 5 dup(2)  字体变为绿色

改为 db 5 dup(5)  字体变为紫色

Line 19行作用 将小写字母转为大写

任务六

代码:

assume cs:code, ds:data

data segment
    db 'Pink Floyd      '
    db 'JOAN Baez       '
    db 'NEIL Young      '
    db 'Joan Lennon     '
data ends

code segment
start:
      mov ax,data
    mov ds,ax    
    mov ax,data
    mov es,ax
    
    mov bx,0
    mov cx,4
s1:    mov si,cx
    mov cx,4
s2:    mov al,es:[bx]
    or al,20h
    mov es:[bx],al
    inc bx
    loop s2
        
    mov cx,si
    mov bx,0
    mov ax,es
    inc ax
    mov es,ax
    loop s1

    mov ah, 4ch
    int 21h
code ends
end start

执行前

 执行后:

 任务七:

代码:

 1 assume cs:code, ds:data, es:table
 2 
 3 data segment
 4     db '1975', '1976', '1977', '1978', '1979' 
 5     dw  16, 22, 382, 1356, 2390
 6     dw  3, 7, 9, 13, 28 
 7 data ends
 8 
 9 table segment
10     db 5 dup( 16 dup(' ') )  ;
11 table ends
12 
13 code segment
14 start:
15     mov ax, data
16         mov ds, ax
17         mov ax, table
18         mov es, ax
19 
20         mov bx, 0   
21         mov si, 0   
22         mov di, 0  
23         mov cx, 5   
24 year:      mov dx, cx  
25         mov cx, 4   
26 yearnum:  mov al, byte ptr ds:[di]     
27         mov byte ptr es:[bx][si], al
28         inc si        
29         inc di          
30         loop yearnum 
31     
32         mov cx, dx     
33         add bx, 10h     
34         mov si, 0       
35         loop year
36   
37         mov bx, 0       
38         mov si, 5      
39         mov cx, 5       
40 income:    mov ax, word ptr ds:[di]
41         mov word ptr es:[bx][si], ax
42         add si, 2
43         add di, 2
44         mov ax, word ptr ds:[di]
45         mov word ptr es:[bx][si], ax
46         add si, 2
47         add di, 2               
48     add bx, 10h    
49         mov si, 5           
50         loop income
51 
52         mov bx, 0       
53         mov si, 0Ah    
54         mov cx, 5      
55 employee: mov ax, word ptr ds:[di]
56         mov word ptr es:[bx][si], ax
57         add si, 2
58         add di, 2    
59         add bx, 10h   
60         mov si, 0Ah    
61     loop employee
62 
63         mov bx, 0      
64         mov si, 5       
65         mov cx, 5       
66 average:    mov ax, word ptr es:[bx][si]
67         add si, 2
68         mov dx, word ptr es:[bx][si]
69         add si, 3       
70         div word ptr es:[bx][si]
71         add si, 3     
72         mov word ptr es:[bx][si], ax
73         add bx, 10h    
74        mov si, 5      
75         loop average
76 
77         mov ah, 4ch
78         int 21h
79 code ends
80 end start

存储:

执行结果:

实验总结：

本次实验的完成需要掌握loop指令中寄存器间数据的转存，理清楚每一次寄存器跳过的地址数。

使用debug工具对程序进行调试，使用g命令一次性执行到程序返回前.