@Windsheer: As I have just been schooled on this....
The current A330 models have an electronic system that uses independent sensors for altitude and airpseed via the pressure pipes (assuming #2 or #3) already brought into the aircraft. Sharing pipes is a common practice.
The ADI or artificial horizon is a self-contained l a s e r ring gyro.
Previous A330's (and A320 series) used the classic arrangement of the altitude & airspeed provided by actual needle pointing pressure actuated gauges, while still using the shared piping arrangement and the ADI being an electric gyro.
In both cases, we also have a compass, lit by electricity internally or flashlight if need be...