PSP firmware 3.90 says 'Hello' | Engadget
How To Update Any PSP To Official 6.61 In 2018! - YouTube
Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
How To Update Your PSP TO 6.61 Official Firmware in 2021 - YouTube
Updating The PSP System Software to 6.60 / 6.61 - pspunk
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
PSP Custom Firmware Guide For All Models 2022 - pspunk
System Update
4 Ways to Upgrade Your PSP Firmware - wikiHow
Update: PSP Firmware 6.10 Available - Exophase.com
Sony marks PSP 3000 release with firmware update that adds direct access to PlayStation Store - CNET
4 Ways to Upgrade Your PSP Firmware - wikiHow
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
May's firmware updates made PS3, Vita, and PSP games harder to get (and some inaccessible) – Delisted Games
4 Ways to Upgrade Your PSP Firmware - wikiHow
RG351P 3.7 Firmware Update – Improved PSP Performance! – Retro Game Corps
How to download PSP games - Quora
PS3 and PSP firmware updates available for download | Tech Ticker
PSP Firmware 6.35 Now Live, Adds Capability for Unlimited Cloud Music Service via Qriocity | by Sohrab Osati | Sony Reconsidered
4 Ways to Upgrade Your PSP Firmware - wikiHow
PSP Firmware 6.20 Brings Digital Comics, Video Playlists - Game Informer
