[PSP] 1.50 to 1.00 Firmware Downgrader (Downdater)

[InsaneNutter]

This is a program to downgrade a PSP from the 1.50 firmware to 1.00

If you are not on version 1.50 you should be able to flash that via the recovery menu if you have a custom firmware enabled PSP.

I used this many years ago on my 1.50 PSP-1000 and it worked perfectly, I have no idea if it will work on all PSP-1000 revisions... it will certainly not work on the PSP 2000, PSP 3000 or PSP Go however.

I would imagine if worst comes to the worst you can recover your PSP with a pandora battery, although use this at your own risk!!

Download PSP 1.50 to 1.00 Firmware Downgrader

To quote the read me:

Downdater 1.50->1.00 by Dark_AleX/Yoshihiro/Mathieulh

This is a program to downgrade a PSP from 1.50 firmware revision to 1.00.

The program has been succesfully tested on various psp's. Despite that, remember that writing to the
flash is always dangerous, and the authors cannot be responsabilized by any damage as this software is free,
unlicensed and comes with no warranty.

**USAGE:**

JUST COPY THE PSP AND DOWNDATER FOLDERS TO THE ROOT OF YOUR 1.50 PSP

***********************

Note: you need to set the language of your psp to either english or japanese before starting
(anyways, it will advice you if you don't have that requirement and it will exit safely)
Also, connect the PSP to the AC adaptor.

- After a confirmation with the X button, you psp will be flashed to 1.00.

DO NOT REMOVE the memstick and DO NOT shut down the psp.

After it is finished, the program will tell you to restart the psp manually. Do it.

At this moment you'll have probably a 1.00 if all went fine.

Thanks to

- Ookm for being the first in flashing the 1.00 ipl in 1.50
- The beta testers Freeplay and others.
- Mélo_FMX RIOT for the icon.