we had an almost usable PS1 emulator running on the zaurus which was about as powerful as the 770! the n900 should be more than enough to make it work. check out the website of zodttd (www.zodttd.com) who did the port from the original psx4all emu to handheld/arm device... you can even download and build yourself! http://github.com/zodttd/psx4all