[PS3 Dev Request]: Have a PSP and familiar with .RCO files?

[Field]

Umm, this might not be a huge help, as I'm pretty much a newbie, but hopefully someone might get an idea from this.

Had a look at some PSP RCO files and they always start with .PRFq [0050 5246 7100]. In fact the first 24 bytes are the same for all PSP RCO files.

The PS3 start with FRP [4652 5000]. The first 14 bytes appear to be the same. The dlna.rco has info linking to 'no media servers were found' and other errors that pop up within the dash. But I guess everyone already knew that. Sorry.

Tried to open PS3 RCO with RCO Editor and of cause, it spat out errors. Tried changing the hex header, but again no go. Tried to use the PSP to decrypt the PS3 RCO, but not really sure what I'm doing. Not even sure that I should be posting this even, with all the modding genius posting here. Tried Z33's Resurssiklunssi to decrypt but it just looked at me funny, lol.

There are some tools for the PSP to decrypt PRX, RCO, PBP files that some users may find useful. Found them here - used google. http://endlessparadigm.com/forum/archive/index.php?thread-4142.html

Sorry I couldn't be more help, I can only hope that it spurs someone in the right direction, sorry. I'll keep digging away. Good luck.

[cherryduck]

Ok, here's what Ive done so far. First I tried opening the files in RCO editer, no go I just get 'Not a valid RCO'. Modifying the header to match that of a PSP RCO, I get 'Invalid RCO - you must use a decompressed (FW.260 or lower) RCO! (Z33's Resurssiklunssi should be able to do the job for you :P).

Trying to run Resurssiklunssi on my PSP Slim simply doesn't work, perhaps someone with a Fat PSP could modify the header and try Resurssiklunssi?

[TheKoen]

I have a psp since it came out and i know pretty much about hacking the psp and all that. I have a psp with firmware 3.90-2 m33 it think now. And i played a few times with the rco editor to make some custom themes and that kinda stuff.

So i think i can help you guys on the rco part.

[arlyn]

more than willing to help

Originally Posted by cherryduck Ok, here's what Ive done so far. First I tried opening the files in RCO editer, no go I just get 'Not a valid RCO'. Modifying the header to match that of a PSP RCO, I get 'Invalid RCO - you must use a decompressed (FW.260 or lower) RCO! (Z33's Resurssiklunssi should be able to do the job for you :P). Trying to run Resurssiklunssi on my PSP Slim simply doesn't work, perhaps someone with a Fat PSP could modify the header and try Resurssiklunssi?

When using Resurssiklunssi on a Fat, it starts to decrypt the rco's (memstick light flashes) if you use either x or o, but powers off maybe 10 seconds later. tried both battery powered and plugged in. it's a shame this program doesn't use a logfile.

Also, extra information, I'm running 3.90 M33-3, with the Fat Patch (v2).
I used a sysmem.prx from a 2.70 eboot to run Resurssiklunssi.
Although installed in a 3.xx kernal format, (a single folder, in the GAME directory)
it will only run under the 1.5 kernel.

it looks like the files aren't passing the header check, if someone can attach the PS3 rco's that have been modified to match the header of the PSP's rco files, i will test them. hint, hint cherryduck.

[nelak]

It would be nice if someone could specify exactly what we should be doing, the idea seems to be, to patch those .rco files, so we are able to decrypt them with the psp right?

If that's so, I try to help you out guys. But I just would like to know exactly what I'm supposed to be doing with them.

[cherryduck]

arlyn I have sent you an e-mail with the modified RCOs.

[almar]

What do you guys want to accomplish because from where I'm standing it looks like an useless attempt to just try something which can never work because of the big difference in file formats? I think the solution I proposed is a bit more fact based and is more likely to work?

[arlyn]

Originally Posted by almar What do you guys want to accomplish because from where I'm standing it looks like an useless attempt to just try something which can never work because of the big difference in file formats? I think the solution I proposed is a bit more fact based and is more likely to work?

we want to uncompress the rco files from the ps3. it can work, there is no difference in file formats (rco, rco). the reason it's hard to uncompress them using psp .rco uncompressor programs is because they are designed specifically for the psp. a dev that created one of the psp uncompressors would have little trouble modifying the program to work with ps3 .rco files. it's possible that we'll have to wait until this happens for this to work.

Originally Posted by cherryduck arlyn I have sent you an e-mail with the modified RCOs.

thank you.

Update. tried the modified .rco files provided by cherryduck, after "reading the language tables" it powers down. so progress... but not success.

thank you

[PS3 News]

Nice attempts thus far- a reminder to please ATTACH files (Post Reply -> Manage Attachments -> Browse to file) being worked on here though guys... this way everyone can check them out and perhaps see something another missed.

We have about 15 PS3 Devs who mingle daily in the private IRC channel, and with the exception of CJPC and 1-2 others only, the rest don't post on the Forums much due to not speaking great English or just not liking posting on public boards.

However, they would like to look at such things (as I'm sure other users here would) so just something to keep in mind... because if they discover something they generally pass along the info to CJPC to share here.

[tsiturbotsi]

Hey Cherryduck, would be nice if we all had a chance to work on your modded versions of these files. You think you might be able to share them?