王爽《汇编语言》第三版 实验13

实验1

安装代码：ins.asm

assume cs:code
code segment
start:  mov ax, cs
        mov ds, ax
        mov si, offset show
        mov ax, 0
        mov es, ax
        mov di, 200h
        mov cx, offset showend-offset show
        cld
        rep movsb

        mov ax, 0
        mov es, ax
        mov word ptr es:[7ch*4], 200h
        mov word ptr es:[7ch*4+2], 0

        mov ax, 4c00h
        int 21h

show:   mov di, 0
looop:  mov ax, 0b800h
        mov es, ax
        mov al, ds:[si]
        cmp al, 0
        je ok
        mov ah, cl
        mov es:[di], ax
        inc si
        add di, 2    
        jmp looop
ok:     iret
showend:nop

code ends
end start

测试代码：test.asm

assume cs:code

data segment
    db 'Welcome to masm!', 0
data ends

code segment
start:  mov dh, 10
        mov dl, 10
        mov cl, 2
        mov ax, data
        mov ds, ax
        mov si, 0
        int 7ch

        mov ax, 4c00h
        int 21h 

code ends
end start

运行效果：

实验二

https://blog.csdn.net/include_heqile/article/details/80928421

实验三

assume cs:code

code segment
s1:     db 'Good, better, best,', '$'
s2:     db 'Never let it rest,', '$'
s3:     db 'Till good is better,', '$'
s4:     db 'And better,best.', '$'
s:      dw offset s1, offset s2, offset s3, offset s4
row:    db 2, 4, 6, 8

start:  mov ax, cs
        mov ds, ax
        mov bx, offset s
        mov si, offset row
        mov cx, 4
ok:     mov bh, 0
        mov dh, [si]
        mov dl, 0
        mov ah, 2
        int 10h

        mov dx, [bx]
        mov ah, 9
        int 21h
        add si, 1
        add bx, 2
        loop ok

        mov ax, 4c00h
        int 21h 

code ends
end start

运行结果：