sample/comecho.asm

   1 ;
   2 ; Simple COMBOOT program that just prints out its own command line.
   3 ; This also works in DOS.
   4 ;
   5
   6         org 100h
   7
   8 _start:
   9         xor cx,cx
  10         mov cl,[80h]                    ; Command line len
  11         mov si,81h                      ; Command line
  12
  13         mov dl,"<"
  14         mov ah,02h
  15         int 21h
  16
  17 .writechar:
  18         lodsb
  19         mov dl,al
  20         mov ah,02h
  21         int 21h
  22         loop .writechar
  23
  24         mov dx,end_str
  25         mov ah,09h
  26         int 21h
  27
  28         ; Exit with near return, INT 20h, or INT 21h AX=4C00h
  29         ret
  30
  31
  32 end_str db ">", 0Dh, 0Ah, "$"