cr equ 13 lf equ 10 segment stack stack resb 64 stacktop: segment data T1 db 'a' S1 db cr,lf,"$" segment code ..start: mov ax,data mov ds,ax mov ah,02h mov dl,[T1] int 21h call Newline End: mov ax,4c00h int 21h Newline: mov dx,S1 mov ax,09h int 21h ret