汇编语言(王爽 第三版)实验十三

Posted 2020-07-17

2）显示八十个‘！’

    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,0b800h
    mov es,ax
    mov di,160*12
    mov bx,offset s-offset se
    mov cx,80
s:    mov byte ptr es:[di],‘!‘
    mov byte ptr es:[di+1],2
    add di,2
    int 7ch
se:    nop
    mov ax,4c00h
    int 21h

show:    push bp
    mov bp,sp
    dec cx
    jcxz return
    add [bp+2],bx
    
return:    pop bp
    iret
showend:nop
    code ends
    end start
    

3）显示英文诗

    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]*160
    mov dl,0
    mov ah,2
    int 10h

    mov dx,[bx]
    mov ah,9
    int 21h

    inc si
    add bx,2
    loop ok
    
    mov ax,4c00h
    int 21h
    code ends
    end start