PSP developer extraordinaire Dark Alex is at it again, pushing the boundaries of firmware hacking to whole new places. His latest creation, Time Machine, is perhaps his greatest feat yet. This gem of a hack allows one to run previous firmwares on the PSP by use of the Pandora Battery.

Why is this cool? The biggest reason we can see is this: the 1.50 firmware, which is generally the most popular base for homebrew code, does not run on the Slim PSP. However, DaX has managed to create a hybrid 1.50 firmware with modules from 3.40 that runs just fine with Time Machine! This means that PSP slim owners no longer need to worry about compatibility issues.

Check out Dark Alex's personal website for downloads as always, and let us know how it goes in the comments!