Int 21 Fn 4408  - DOS 3.0+ - Ioctl - Check If Block Device Removable       [D]

   AX = 4408h
   BL = drive number (00h = default, 01h = A:, etc)

Return: CF clear if successful
       AX = 0000h if removable
          = 0001h if fixed
   CF set on error
       AX = error code (01h,0Fh) (see AH=59h)

See Also: AX=4400h,AX=4409h,INT 2F/AX=122Bh