Int 10 Fn 12  - Video - Alternate Function Select (vga, Mcga) - Palette L  [V]

   AH = 12h
   BL = 31h
   AL = new state
       00h enable default palette loading
       01h disable default palette loading

Return: AL = 12h if function supported
Desc:  specify whether a default palette should be loaded when the display
     mode is set

See Also: AH=00h