INT 14 - DimVGA v2.0+ - SET TIME-OUT (DIMMING/BLANKING) PERIOD
	AX = AA02h
	BX = number of clock ticks
Return: AX = FFFFh
Note:	on screen modes with 256 or less colors DimVGA will dim the screen,
	  when more than 256 colors can be used DimVGA will blank the screen.
SeeAlso: AX=AA01h,AX=AA03h,AX=AA04h,AX=AA06h
Index:	screen saver;DimVGA