The only chips widely known to work today with the general games coverage are the NEO2.2 from www.playstationmods.com and modchips from www.modchips.com.

I'm about to try the Origachip which is principally designed for Jap PS2s and there is a PAL version also of which I have no knowledge). The Origachip plays PS2 import originals. www. madeiragames.com