Int 15 Fn 530C  - Advanced Power Management V1.1+ - Get Power State        [p]

   AX = 530Ch
   BX = device ID (see #0400)

Return: CF clear if successful
       CX = system state ID (see #0401)
   CF set on error
       AH = error code (01h,09h) (see #0399)

See Also: AX=5307h