xgen and downgrading

[greatsage]

so you were able to download 5.03 to 5.02 :w00t: could somebody try this method on ofw5.50 downgrading it to ofw5.03:scared:

---------- Post added at 09:57 AM ---------- Previous post was at 09:55 AM ----------



so the ifhandle-exploit doesn't work on ofw5.50 anymore?

so,now it is still impossible to downgrde ofw5.50?i just wanna try play some hb games.i'm kinda bored buying umds and then bring them anywhere i go..

 

[coyotebean]

Tried with my OFW 6.20 PSP-1XXX, using 5.00 index_01g.dat RSOD, using 6.00 OK. Still a bit worry to try this with my PSP-3XXX 5.03 GEN-B (Full) to "clean it up"

 

[n00b81]

so,now it is still impossible to downgrde ofw5.50?i just wanna try play some hb games.i'm kinda bored buying umds and then bring them anywhere i go..

tbh dude, its kinda clear you just want ISOs and not real hb

And, of course its possible to downgrade from 5.50, or run a HEN on it, but another kmode exploit will need to be used with it on either Mercury or MOHH. There are already a few that are patched in 6.xx, they just need to be implemented.

n00b81

 

[coyotebean]

Just did a review of "key" used in "index.dat".

01g/02g/03g/04g

100- 07000000
150  07000000
151  07000000
152  07000000
200c 07000000
201  07000000
250  B818624D
260  495BE403
270  495BE403
271  495BE403
280  0B2B05F0
281  0B2B05F0
282  0B2B05F0
300  0B2B06F0
301  0B2B06F0
302  0B2B06F0
303  0B2B06F0
310  0B2B08F0
311  0B2B08F0
330  0B2B0AF0
340  0B2B0AF0
350  0B2B0AF0
351  0B2B0AF0
352  0B2B0AF0
360-         /0B2B10F0
370  0B2B0BF0/0B2B11F0
371  0B2B0BF0/0B2B11F0
372  0B2B0BF0/0B2B11F0
373  0B2B0BF0/0B2B11F0
380  0B2B0BF0/0B2B11F0
390  0B2B0BF0/0B2B11F0
393a 0B2B0BF0/0B2B11F0
393b 0B2B0BF0/0B2B11F0
395  0B2B0BF0/0B2B11F0
396u 0B2B0BF0/0B2B11F0
400  0B2B0BF0/0B2B11F0
401  0B2B0BF0/0B2B11F0
405  0B2B0BF0/0B2B11F0
420- (not available)
500  0B2B0BF0/0B2B11F0/0B2B1EF0
501  0B2B0BF0/0B2B11F0/0B2B1EF0
502  0B2B0BF0/0B2B11F0/0B2B1EF0
503  0B2B0BF0/0B2B11F0/0B2B1EF0
505u 0B2B0BF0/0B2B11F0/0B2B1EF0
550  0B2B0BF0/0B2B11F0/0B2B1EF0
555u 0B2B0BF0/0B2B11F0/0B2B1EF0
600  0B2B0CF0/0B2B12F0/0B2B1FF0/0B2B1FF0
610  0B2B0CF0/0B2B12F0/0B2B1FF0/0B2B1FF0
620  0B2B0CF0/0B2B12F0/0B2B1FF0/0B2B1FF0

 

[dna123300]

How the heck did you downgrade psp 3k?

 

[Ben-to-b-free]

How the heck did you downgrade psp 3k?

He already explained it.

 

[insane]

How the heck did you downgrade psp 3k?

with davee, pspgen, and Raiden1996's help.

---------- Post added at 01:35 AM ---------- Previous post was at 01:19 AM ----------

I was thinking... By using whatever method that could be used to read/edit the index.dat, would it be possible to re-arrange the order of entries in the 5.00(or greater) index.dat to make it compatible with 6.xx firmwares?

 

[Bill]

with davee, pspgen, and Raiden1996's help.

---------- Post added at 01:35 AM ---------- Previous post was at 01:19 AM ----------

I was thinking... By using whatever method that could be used to read/edit the index.dat, would it be possible to re-arrange the order of entries in the 5.00(or greater) index.dat to make it compatible with 6.xx firmwares?

There'd be really no point. To do that, you'd need Kmode access, and with that, there's no reason to downgrade, since GEN is working on 6.XX anyway.

 

[HacKmaN]

In my oppinion a downgrader from 6.xx to 5.03 would be much better then a HEN, so we wouldn't have to run a game sploit everytime. But yeah, since we don't have any kernel mode exploit for 6.xx firmware it's impossible for now.

 

[WalangAlam]

In my oppinion a downgrader from 6.xx to 5.03 would be much better then a HEN, so we wouldn't have to run a game sploit everytime. But yeah, since we don't have any kernel mode exploit for 6.xx firmware it's impossible for now.

so given kernel mode on 6.xx, is it really safe to downgrade a 6.xx psp3k to 5.03? is there any documentation around? did anybody tried downgrading a psp3000 besides insane?

 

[Davee]

so given kernel mode on 6.xx, is it really safe to downgrade a 6.xx psp3k to 5.03? is there any documentation around? did anybody tried downgrading a psp3000 besides insane?

Yeah, I downgraded a 3k via patching the index.dat checks. Although I think the encryption has changed in the new firmware.

 

[azwald]

hey davee, how did you change 3k 6.20 index.dat?
we can't go into non-HEN PSP 3k to change it right?

 

[Davee]

hey davee, how did you change 3k 6.20 index.dat?
we can't go into non-HEN PSP 3k to change it right?

Through unofficial software.

 

[Bill]

Through unofficial software.

well youz need to make a HEN for 6.20 becuz I wants you to, else imma be RAGGEEEE!




[STRIKE]On a serious note, have you devs been able to get kmode access to 6XX yet?[/STRIKE]

Actually, I'm going to go ahead and say no, because even if you did, I wouldn't want you to state that here.

 

[Jhazky]

well youz need to make a HEN for 6.20 becuz I wants you to, else imma be RAGGEEEE!




[STRIKE]On a serious note, have you devs been able to get kmode access to 6XX yet?[/STRIKE]

Actually, I'm going to go ahead and say no, because even if you did, I wouldn't want you to state that here.

They've already made HEN for 6.20 and it even works on pspgo but they decided not to release it due to piracy issues..

Just curious.. Is it possible to downgrade a PSPGO to lower firmware?

 

[azwald]

wow, so HEN 6.20 is really exist

 

[WalangAlam]

Yeah, I downgraded a 3k via patching the index.dat checks. Although I think the encryption has changed in the new firmware.

thanks a lot Davee

 

[HacKmaN]

Is it possible to downgrade a PSPGO to lower firmware?

I don't think so, afaik it would be like trying to downgrade the slim to 1.50, importent hardware modules would be missing and if it worked, a huge part of the software would't work anymore (e.g. the savestate feature).

 

[Hellcat]

I don't think so, afaik it would be like trying to downgrade the slim to 1.50, importent hardware modules would be missing and if it worked, a huge part of the software would't work anymore (e.g. the savestate feature).

Depends on what FW the PSP is on. If you have 6.xx on your GO you could (in theory) go down to 6.00 or as low as 5.70.

 

[insane]

It seems that without modification(improvement?) the xgen updater cannot install ofw to a 3000 and if anyone tries the method I used to downgrade, first backup your psp's index.dat. After replacing your index.dat do not exit the gen cfw, immediately run the ofw update(know what the lowest firmware your revision of psp is capable of accepting) from gen. This way if you get a red screen of death do not do anything other than press select to go into the vsh menu/recovery and enable usb access to flash 0 then reinsert the 5.03 index.dat to the correct folder and reboot the psp. This might allow you to save your psp. I just want to say that for most people, downgrading a psp3000 or non Pandora-able 2000 is kinda pointless at this time.