Gaming emulators for the iPhone and iPod Touch will soon swell in ranks as psx4all, an original-Playstation emulator, joins the fray.  Currently pre-beta, the software works on the Apple devices but is currently being tweaked so as to increase speed as well as screen placement and scaling.  Controls, too, are due to come in for some attention; as you can see from the screenshots, packing all of the original joypad functionality onto a touchscreen - even when that screen has MultiTouch capabilities - makes for a complicated system, and developer zodttd is planning on scything out some of the extraneous buttons.

Compatibility with around 75-percent of titles is predicted, and considering the size of the Playstation's back-catalogue that's a fair few games.  Sound, memory card support and save-states will also likely feature.

Beta testing will be open to those who have donated to psx4all or the earlier gpSPhone GameBoy Advance emulator.  Now who will be the first to put together a Playstation-style joypad screen overlay?

[via ArsTechnica]