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  Interrupt:   10h     Function:   1Ch
 
  Title:       Save or Restore Video State
 
  Description:                                                    [PS/2]
 
     Saves or restores the digital-to-analog converter (DAC) state and
     color registers, ROM BIOS video driver data area, or video
     hardware state.
 
     Input                                 Output
 
     AH = 1Ch                              If function supported
     AL = Subfunction                        AL = 1Ch
        = 00h to get state buffer size     And if called with AL = 00h
        = 01h to save state                  BX = buffer block count
        = 02h to restore state               (64 bytes per block)
     CX = Requested states                 Or if called with AL = 01h
                                             State information placed
          Bits     Significance              in caller's buffer
                                           Or if called with AL = 02h
          0        Save/restore video        Requested state restored
                   hardware state            according to contents of
          1        Save/restore video        caller's buffer
                   BIOS data area
          2        Save/restore video
                   DAC state and color
                   registers
          3-15     Reserved
 
     ES:BX = segment:offset of buffer
                                    -♦-