I want to build my own operating system for my sony clie PEG-SJ30/U handheld.....how would i go about starting to do this? And would anyone be willing to help me?
I personally HATE the operating system they have on the handheld already... i want to build one to suit my needs!
You mean you want to hack the firmware.
Go to your local service center and ask them if they can update the firmware for you. If that doesn't satisfy you ask them to give you the firmware image on a CD and then you can experiment with a disassembler.
May God be with you.
For a disassembler I reccomend OllyDbg, and be sure to learn what assembler code goes with what mnemonic(instruction, function, whatever you want to call it), in which case you will need to know what processor comes with the system.
what language am I going to have to know?