INT 14 - DimVGA v2.0+ - UNDIM SCREEN 'MANUALLY'                                 
	AX = AA09h
Return: AX = FFFFh
Note:	this function will undim the screen immediately, even if DimVGA is
	  currently disabled
SeeAlso: AX=AA01h,AX=AA08h
Index:	screen saver;DimVGA