INT 10 - VIDEO - READ ALL PALETTE REGISTERS AND OVERSCAN REGISTER (VGA)

	AX = 1009h
	ES:DX -> 17-byte buffer for palette register list (see #00018)
Return: nothing
Note:	UltraVision v2+ supports this function even on color EGA systems in
	  video modes 00h-03h, 10h, and 12h; direct programming of the palette
	  registers will cause incorrect results because the EGA registers are
	  write-only.  To guard against older versions or unsupported video
	  modes, programs which expect to use this function on EGA systems
	  should set the ES:DX buffer to FFh before calling.
SeeAlso: AX=1002h,AX=1007h,AX=CD02h