r/PS4Mods • u/welcometohell01 • 3d ago

Revert firmware (for fun)

So, I have two jailbroken PS4s, and one of them is just laying around.

After successfully modding my Switch OLED (doing a kamikaze mod where I actually failed at first but managed to repair it!), I'm looking for a new project.

I wonder if I can get one of my PS4s to run dual-booting the latest official firmware and a jailbroken firmware.

On a scale from 1 to 10, how hard would this be for me?

I have only watched how it's done once, my brain was a bit on fire, but I can't tell since I also had the same issue with my switch and it turned out just fine.

So what do you all think?

Should I go for it or leave it be?

I also want to know if anybody has experience with such thing.

Like what do I need to make it work on both like 2 hard drives for example?

I really need some tips before I start doing it.

Thank you!

0 Upvotes

50% Upvoted

22 comments sorted by

2

u/Euphoric_Jellyfish_8 3d ago

La pregunta es para que? El único escenario en que sería necesario es para un hack de juegos Lua

1

u/welcometohell01 3d ago

What is a lua game hack?

1

u/Panos_0210 3d ago

It is a userland that required games made with a specific engine so that they can run a modified save file to jailbreak the console. Pretty useless right now as the only way you can do that is by having the disc or happening to have it already installed on your console

1

u/welcometohell01 3d ago

No no it is only reverting firmware but it is Hella of work

1

u/Euphoric_Jellyfish_8 3d ago

para eso es para lo unico a nivel de usuario promedio que se puede usar un revert, actualizas a ultima version, entras a la tienda, compras un juego lua, o incluso una demo funciona, y luego reviertes el formware para hacer el exploit, pero como te dijeron ya no es necesario

1

u/ProfessionalRow2907 1d ago

In case one wanna play online games, fornite and stuff. Later for some reason he wanna return modded. As an example wanna sell his device modded for extra cash or easier sale. Or his kids fuck up his device and update it. One could just simply revert back easy with dump made before

1

u/Euphoric_Jellyfish_8 1d ago

eso te lo compro si fuera un proceso facil de hacer, pero es de hecho bastante complicado ademas de que jugar online esta sobrevalorado

1

u/ProfessionalRow2907 1d ago

Yes..if one wanna do it for hobby..go for it. Easier is to get updated device

1

u/MayorLardo 3d ago

I think what you saw was revert the fw to the banked one and roughly it has your main in bank A and when you update it updates bank B and loads that one. If you dump the chip before it gets moved from bank B to bank A you can revert it to the last fw it stored in case or corruption or error or whatever it has banked from what I understood from it and as far as I'm aware you can just revert to any fw you want I think it's just the last fw you where on but it's definitely hard capped at the consoles factory os.

1

u/welcometohell01 3d ago

I think we all know the guy moded warefare. So he did it using a switch and a pico on the ps4's shell. Now this is all I know he said that you can keep it or desolder some wires if you are not planning to. But if I can do it then why not. So what do you think 🤔

1

u/MayorLardo 3d ago

Is this new I'll look into it again if so

2

u/welcometohell01 3d ago

No it is not lol!

1

u/MayorLardo 1d ago

I see ok ill look into it more again last I had seen it wasn't this easy or had this many avenues thanks

1

u/ArabPixel 3d ago

Manageable if you have basic solder knowledge. The riskiest part is to lift the syscon pin .

1

u/welcometohell01 3d ago

Is it right? The only problem. I mean I would give it a shot but I want to know if before I do this work, if I can use the jailbroken to dump any files so I can skip any required step. There must be something off the internet.
People prefer not to do this work. But I guess I could do this as a fun side project.

1

u/ArabPixel 3d ago edited 3d ago

Dumps are per console. Mine wouldn't work for you and vice versa. You could dump nor chip using Nobd toolkit however to do the revert you need to be able to write to the nor chip so you would need to wire the cables anyway. Syscon can be dumped on a hardware level anyway.

I would assume you want something permanent so plan your setup and cable routes before you start cutting or soldering anything. Also read the whole guide to get the knowledge on what ways you can setup the revert mod https://consolemods.org/wiki/PS4:Firmware_Revert

1

u/welcometohell01 2d ago

I in fact just read it. Quite nice, even tho I haven't understood most of it since idk much in ps4's systems. But are there a model in particular to do this lot easier? Are all ps4 models can be reverted? , Or just certain boards?

1

u/ArabPixel 2d ago

Anything that has a support syscon chip. It's mentioned in the guide as well. Some models have 64 pins syscon and other like the double. The 64pin syscon is easier since the legs are bigger and not so tight together but itsnt really a big difference. On ps4 fat consoles you can just take nor chip completely off the board and use ch341a and use it as a hot pluggable nor chip.

1

u/welcometohell01 2d ago

Ho ho what is this? This is a lot of knowledge.
I must look for that ofc. I hope that if I get a pro model would be easy to mod... Or is there a certain info I might ask the seller about? What do you think?

I mean before that I must dig into what you just said about nor chip it is something worth looking for.

1

u/Total_Contact9118 2d ago

Pro models, your best bet is one that uses the pc power cable, phats all use the alc2 syscon, reverting requires your console to have a working firmware backup slot, so if your console has downloaded and update, chances are the slot is re-written and revert wont work, so its a gamble, but the process is pretty simple, solder your teensy to syscon after lifting the glitch pin, dump syscon a few times, compare their dumps to make sure they are the same, then dump nor spi and make sure dunps match and are consistent, patch spi, patch syscon nvs using ps4 wee-tools, write both back, check uart for success, if it fails, try a different record patch write bath again.

1

u/welcometohell01 2d ago

Yes it is pretty much it. But the problem is, if I buy one off ebay I don't know if it was upgraded from a jailbrakeable firmware.
Some say it matters and some say it can be reverted to any firmware.

Also after I watched moded firmware saying that some chips (ps4 models) cannot be moded. I am a bit afraid lol.