This multi-firmware downgrader allows you to install a lower (or higher) firmware without any fuss. No complex flash0 sharing, just running the firmware update.
However, there comes restriction with PSP models and compatible firmware. For example, a PSPgo cannot run 1.50 as there are no drivers for the system and the IPL format is incompatible. Much like this, the PSP 3000 09g is unable to install firmwares < 6.30 which removes it's ability to appreciate the flexibility of permanent custom firmware.
This is no longer the case.
Well now it's possible to downgrade 3k 09g to 6.20 and install Perma Patch!! all thanks to psp Dev DAVEE
Turns out there isn’t much difference between a PSP-3000 04g and 09g … and after discovering those differences Davee has patched up his downgrader, releasing Chronoswitch Downgrader version 5. You can read the technical details following the source.
A word of advice though, this is still experimental. The idstorage certificates do NOT belong to a 04g PSP and upgrading and downgrading from <= 6.20 to another <= 6.20 will NOT WORK. It is possible to resign the idstorage with a compatible 04g donor so this is possible, but the effects are unknown.
You run the application at your OWN risk. This Site and the Creator aren't held accountable if your PSP Bricks!!
Props to “Gamefreeak100″ for the first brave and bold steps into a 09g permanent patch world, he sacrificed his PSP for it.
Download:
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Last edited by Bou on Mon Dec 26, 2011 4:59 pm; edited 1 time in total