INT 10H 12H BL=31H: Palette Loading on Mode Set

                                                          Compatibility: VGA 
 Expects: AH    12H
          BL    31H
          AL    setting: 00H=enable default palette loading on mode reset
                         01H=disable (use current palette on mode changes)
 Returns: AH    12H if a valid value was passed in AL
    Info: This changes how the BIOS handles the color palette on subsequent
          calls to INT 10H 00H (set video mode).  It updates bit 3 of the
          VgaFlagsRec (at 0040:0089).

          When automatic palette loading is enabled (the default setting),
          the BIOS reprograms the ATC with the default palette values each
          time the video mode is reset.  You can modify the VgaSavePtr2Rec
          to setup your own palette to be used the default.

          When disabled, the current palette setting are left in place on
          mode changes.

See Also: INT 10H 12H (EGA/VGA Special Functions/Alternate Select)
          INT 10H: Video Services
          EGA/VGA Data Areas