Hello! Can someone tell me if there is any way to replace the "OS" that manufacturers provide on various types of handheld devices, eg. the Gizmondo, PSP, different PDAs....., and replace it with something else? Also, where is information on these devices (technical docs) and how to program them? (I'm just a hobbyist, not a big software company of any kind). I'd like information, for example, on what CPU it has, how much memory, is there a ROM of some kind and what does it have on it, and also how to program any other hardware that may be there, eg. a USB port, or camera etc.
Thanks.