Int 62 Fn 00DA  u - Fgdriver V4.02 - "fg_vgastate" - Save/restore Vga Con  [V]

   AX = 00DAh
   BX = direction (0000h save, else restore)

Notes: the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145)
   this function is only meaningful in modes 0Dh and above