INT 15 - Advanced Power Management v1.1+ - GET POWER STATE                      
	AX = 530Ch
	BX = device ID (see #00474)
Return: CF clear if successful
	    CX = system state ID (see #00475)
	CF set on error
	    AH = error code (01h,09h) (see #00473)
SeeAlso: AX=5307h