Find Out Which Firmware Version a PSP Runs

Finding out which version of the PSP firmware your PlayStation Portable is running is simple. Just follow this guide.

PlayStation Portable Core (PSP 1000) : Sony Psp

Found my old PSP running 5.50 prone. How can I safely upgrade to

PlayStation Portable / Useful Notes - TV Tropes

The Strengths and Weaknesses of the PSP Models

How To Update Your PSP TO 6.61 Official Firmware in 2021

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PRO Firmware PSP - GameBrew

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Mod a PSP, Super Easy