INT 10,1C - Save/Restore Video State (VGA only)

	AH = 1C

	AL = 0	get save buffer size
	   CX = requested states
		bit 0: video hardware state
		bit 1: video BIOS data areas
		bit 2: video DAC state

	on return:
	AL = 1C
	BX = buffer size in 64 byte blocks

	AL = 1	save requested state
	   CX = requested states (see AL = 0)
	   ES:BX = pointer to buffer

	returns nothing

	AL = 2	restore requested states
	   CX = requested states (see AL = 0)
	   ES:BX = pointer to buffer

	returns nothing