INT 10H 1c00H: VGA Query Size of State-Save Buffer

                                                          Compatibility: VGA
 Expects: AX    1c00H
          CX    type(s) of video-state info expected to be saved (see below)
 Returns: AL    1cH (if this fn is supported)
          BX    size of save-state buffer, in 64-byte blocks
    Info: Use this fn before calling INT 10H 1c01H (save video state).  It
          lets you know how much memory will be needed to save the
          specified video state information.

       CX is a set of bit-flags indicating what types of video-state
          information you need to save:
           1 1
          Ö5Â4Â  Â7Â6Â5Â4Â3Â2Â1Â0·
          º0 0ooo³0 0 0 0 0³c³d³hº
          ÓÄÁÄÁ  ÁÄÁÄÁÄÁÄÁÄÁÒÁÒÁÒ½ bit mask
                            º º ÈÍ> 0: 01H  video hardware state info
                            º ÈÍÍÍ> 1: 02H  video BIOS data area info
                            ÈÍÍÍÍÍ> 2: 04H  DAC state and color registers

See Also: INT 10H 1cH (VGA Save/Restore Functions)
          INT 10H: Video Services
          EGA/VGA Data Areas