Korean Job Discussion Forums

[cj1976]

I have a PSP with custom firmware 3.30EAR+ so I can run homebrew and games from the stick. I want to change it to a higher firmware. I'm abit confused as what I should do.
Do I need to downgrade it first to 1.5, or can I just simply upgrade without downgrading?
There's tons of stuff on the net about it, but I can't be arsed to trawl through it all. Anyone know the short answer to the question?

Thanks

[SHANE02]

If it's CFW then you don't need to downgrade first.

[denverdeath]

Pretty sure you want to go from 3.30--->3.52--->3.52-4--->3.90--->3.90-3--->1.50addon1--->1.50addon2 if you want the latest with homebrew ability.

This one looks like a fairly good tutorial...

http://forums.afterdawn.com/thread_view.cfm/616311

except for this...

http://forums.afterdawn.com/thread_view.cfm/644267

So, you may want to stop after the 3.52-4 install and do the update to 3.90-3 yourself from the downloads at the Dark Alex site.

http://www.dark-alex.org/

Other good sites, some with good forums/tutorials..

http://forums.qj.net/f-psp-firmware-discussion-253.html/

http://www.psp-hacks.com/

http://forums.maxconsole.net/

http://en.wikipedia.org/wiki/PlayStation_Portable_homebrew

http://www.upms-project.com/index.php

http://www.upms-project.com/forums/

http://www.lan.st/showthread.php?t=1427

[Mr. Pink]

I found the afterdawn forums the easiest to understand in terms of spelling it out for the techno stupid

[cj1976]

Cheers for that. I upgraded it 3.90 and have now found that it's very buggy and lots of stuff doesn't work anymore. So now, I have a new problem. I need to downgrade it back to 1.5, but this is impossible without making a "Pandora Battery" which means buying a new memory stick that I don't really need.
Balls.

[Temporary]

You know you can reformat the stick. You can even reverse a pandora battery.

[chevro1et]

Hereis another pretty easy to follow guide:
http://www.pspmod.com/forums/custom-firmware/27074-step-step-1-50-3-90m33-guide.html

EDIT: if you upgraded to 3.90 m33 (custom firmware) youdo not need a pandora to downgrade your custom firmware. If you upgraded to 3.90 official firmware, then you do need a pandora.
If worst comes to worst, you can probably take it to a psp vendor and get whatever custom firmware you want flashed to it for a nominal fee. This is what I did when I bought my psp slim, it was only 15 000W and he put a few games on my mem stick too.

[cj1976]

That guide only seems to explains how to change up to 3.90, not how to reverse the process. I managed to get from 3.30 to 3.52 then up to 3.90 CFW without any problems, but now I can't figure how to go back to 1.5.

[denverdeath]

[cj1976]

I've found that the 3.90 m33-3 CFW has compatibility issues with some emulators and it won't run PSX games no matter what I try. It seems to be a common issue that is most easily resolved by reverting back to a previous CFW.

[denverdeath]

[cj1976]

I made a pandora battery and flashed down to 3.71 m33. Now I have no problems at all and all my PSX games run just fine.

[SHANE02]

[denverdeath]