Yeah, i would like to learn more about hacking a psp too.pleeeaaassse..

well all I can say is good luck getting sum1 to help you out with it, I've been tryin for forever now, and still don't have a clue about the PSP and crap like that

Everyone these days are busy with their own crap. Imagine a worldwide forum where maybe 20 people are good enough to actually offer some productive help. Then imagine a forum where everyday 20 people say " show me how to..." "someone teach me...." "I need....".

What I am saying is the knowledgeable ones would never be able to keep up with the demand, and never have time to learn anything new. And believe me, it takes a lot of time and hard work to figure out this stuff.

Most are only too happy to help people out people that show some initiative and start learning for themselves. There is so much information out there that you dont always need anyones help, just google. This aint just a cliche fellas, its true.

If you say "show me how to hack" What good is that?

maybe try:
I have been trying to hack the PSP, Ive read all I can find on ...... and I dont understand ...... I have tried........ and it doesnt load, it gives....... error.

the very first thing you should is at least go to the search page on your forum and search. Youve no idea how many times people ask questions that have been answered months before. Its really annoying and it will put you in a bad light straight away.

This post is meant to help you not flame you, so take it as advice.

HaQue

Hmm...I'll share from what I know.

First of all, the Sony PSP SDK that was leaked is actually incomplete, thus it doesn't work.
People use a C++ toolchain in Cygwin for development, or something to that measure. If we DID have the actual SDK, we'd be bricking less PSP's because we'd have the PSP emulator, and we wouldn't NEED exploits as we could sign the software ourselves, and even run any kind of program on any firmware, including 2.0, 2.01, 2.5, and 2.6.

PSP homebrew was first started after a group known as the Saturn Expedition Committee figured out a way to trick the PSP to run homebrew code on a 1.0 firmware by making it look like a program signed by Sony. It was compiled with the PS2dev toolchain from ps2dev.org. Engadget has an article here:
http://www.engadget.com/entry/1234000233042443/
Since then, though, the site seems to have gone down. Their app was a simple "Hello World" script that could only be turned off after activating by pulling the battery out, since at the time they still hadn't figured out the program exit code.

1.5 homebrew was finally achieved when a group known as the KXploit team figured out how to bypass the PSP's new security checks by making it read an actual Sony-signed eboot from a folder, then immediately re-routing all functions to another, unsigned eboot after the security certificate was read. This was achieved at first by swapping a Memory Stick with a signed EBOOT on it shortly after launching the app with a stick that had the exact same program directories, but a homemade EBOOT in place of the signed one. It read the signature from the legit one, but ran the code of the homebrew. Later on, they bypassed the need for a stick swap by telling the PSP to run an app from a folder with a % at the end. You had two folders:

homebrew
homebrew%

My theory is that it ran the % eboot first, but after reading the signature, because the PSP's firmware prevents it from reading invalid characters (% in this case) in the name, it looked for the folder "homebrew" instead of "homebrew%" and ran the eboot.

2.0 homebrew was found after someone discovered that a hacked .tif file could crash the PSP. Soon afterwards, a person called groepaz from the homebrew groups Team Hitmen and Toc2rta was able to create the first Hello World app for PSP by taking advantage of the .tif exploit and telling the PSP to run a .bin file located in the root directory of the Memory Stick.
http://pspupdates.qj.net/2005/09/hello-20-world.html

Later on, a user known as Fanjita developed the 2.0 EBOOT loader, which can run some 1.5 and 1.0 homebrew on a 2.0 PSP. It has its limitations, though; because the .tif exploit runs in user mode rather than kernel, homebrews that require special firmware-based functions to operate(IR port, USB access, WiFi, etc.) don't run, as access to the kernel is denied.

Uhh...that's as much as I really know. If you have experience in C++/C, here's a couple of links that might push you in the right direction:
http://forums.qj.net/showthread.php?t=13778
http://forums.ps2dev.org/
http://ps2dev.org/

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