任务一:
1-1
1.DS=076A SS=076B CS=076C
2.data =X-2;stack=X-1.
1-2
- DS=076A ;SS=076B;CS=076C
- Data =X-2; stack =X-1;
1-3
1.DS=076A ;SS=076C;CS=076E
2.Data =X-4; stack =X-2;
1-4
- DS=076C;SS=076E;CS=076A
- 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.