Sony Playstation Portable PSP-1004, Video Gaming, Video Game Consoles, PlayStation on Carousell
4 Ways to Upgrade Your PSP Firmware - wikiHow
Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
Just bought a PSP 1004! this thing is in almost excellent shape, everything is working. its on firmware 2.81! i am gonna put CFW on it. I owned a Street model(E1004) before
Find Out Which Firmware Version a PSP Runs
Sony PSP receives random firmware update - SlashGear
PlayStation Portable - Wikipedia
4 Ways to Upgrade Your PSP Firmware - wikiHow
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
Hack, Install Custom Firmware on Sony PSP-E1004 Street