应用举例:在屏幕的第12行,显示data段中以0结尾的字符串。
assume cs:code data segment db 'conversation',0 data ends code segment start: mov ax, data mov ds, ax mov si, 0 mov ax, 0b800h mov es, ax mov di, 12*160 s: cmp byte ptr [si], 0 je ok mov al, [si] mov es:[di], al inc si add di, 2 mov bx, offset s-offset ok int 7ch ok: mov ax, 4c00h int 21h code ends end start
安装程序
assume cs:code code segment start: mov ax, cs mov ds,ax mov si,offset do0 mov ax,0 mov es,ax mov di,200h mov cx,offset do0end-offsetdo0 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 do0: push bp mov bp,sp add [bp+2],bx pop bp iret mov ax,4c00h int 21h do0end: nop code ends end start