hexout:           push edx
                  push cx
                  mov cx, 8
hoh:              rol eax, 4
                  mov edx, eax
                  and dl, 0Fh
                  add dl, '0'
                  cmp dl, '9'
                  jng hona
                    add dl, 'A'-'9'-1
hona:             push ax
                  mov ax, 200h
                  int 21h
                  pop ax
                  loop hoh
                  pop cx
                  pop edx
                  ret