Sony PSP receives random firmware update - SlashGear
PlayStation Portable system software - Simple English Wikipedia, the free encyclopedia
PSP: Custom Firmwares for Firmware 6.61 possible - Currently being updated! - Wololo.net
How To Update Official PSP Firmware In 2022 Without WIFI Access - YouTube
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | GBAtemp.net - The Independent Video Game Community