Homebrew developer Yoshihiro, one of the great PSP contributors back in the day has created a utility that installs 5.50 debug firmware on PSP-1000 and run the application without any limitation. The 5.50 firmware testing tool will allow you to test games in file format during development and let you set hidden options of your PSP that could possibly unlock the full potential of the system.
For now, the 5.50 firmware testing tool is not yet distributed by Yoshi. Stay tuned for further updates.
- Custom Firmware 5.50GEN-A released, Build 4 now available for slim users to fix PSN issue
- Yoshihiro Leaves the Scene!