;filename : sz.asm
           .486
code       segment   use16
assume     cs:code
asd:       mov ah,1
           int 21h
           mov bl,'y'
           sub al,bl
           jnz asd
           in al,61h
           or al,03h
           out 61h,al
           mov dx,12h
           mov ax,34deh
           mov cx,1000
           div cx
           out 42h,al
           mov al,ah
           out 42h,al
 fgh:      mov ah,1
           int 21h
           mov bl,'n'
           sub al,bl
           jnz fgh
           in  al,61h
           mov al,0h
           out 61h,al
           mov ah,4ch
           int 21h
code       ends
           end    asd