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194w ago - Today Italian site DiGiTaLAnGeL (linked above) reports that they have successfully downgraded a PS3 Slim 3.70 Firmware unit to 3.55 Kmeaw Custom Firmware, followed by a New Method - PS3 Downgrade v2 Supports all NOR Flash from TwoStone.

Similar to the PS3 Firmware 3.6x Downgrade via Infectus, this round they have downgraded a PlayStation 3 v3.70 Firmware console using ProgSkeet with the assistance of Dospiedra with a roughly translated PS3 3.7x Downgrade for Slims and Fats with NOR Flash now available.

To quote, roughly translated: The first downgrade to 3.70 on PS3 Slim 3:55, DiGiTaLAnGeL tested by us!

For the first time, we have been involved in something truly spectacular We were the first in the world to test the downgrade from 3.70 to 3:55 on a PS3 Slim (With flash memory, "NOR") using the ProgSkeet and patched some files provided by dospiedra, a famous Spanish coder already riding high for having discovered the method of going back to 3.55/3.41 with the PS3 (FAT flash memory "NAND").

After several attempts, in collaboration with dospiedra, we got to go back from 3.70 to 3:55, enter the factory mode with a simple key to jailbreak, rifleshare a modified version of 3:55 to prevent the SYSCON (the registry in between downgrades) was consulted during the downgrade and now we are happily at 3:55 KMEAW!

With this version of moddata 3:55, you can perform a memory dump today and you can switch on the fly from 3:55 to 3.70 without having to do this all the time-consuming process: using progskeet fact you can go straight to 3.70 changed to 3:55!

Dospiedra said it will release details on the patches applied to the NOR and the update file as soon as possible.

New life for those who arrived too late to enjoy the benefits of the 3:55?





PS3 Slim 3.70 Unit Downgraded to 3.55 Kmeaw Custom Firmware

PS3 Slim 3.70 Unit Downgraded to 3.55 Kmeaw Custom Firmware

PS3 Slim 3.70 Unit Downgraded to 3.55 Kmeaw Custom Firmware

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#47 - HeyManHRU - 193w ago
HeyManHRU's Avatar
There is no need to use this tutorial if you have Kmeaw CFW.

#46 - dok2033 - 193w ago
dok2033's Avatar
GREAT & i have a question for the one who already has kmeaw CFW running.. what is exactly the step to start from this tutorial ??

#45 - EiKii - 193w ago
EiKii's Avatar
Quote Originally Posted by adrianc1982 View Post
I hope we get this method for the fat ps3s, but somehow I doubt it since they have the complete flash in the ps3 and not on the hdd. Correct me if I'm wrong...

But great fo those ps3 slim users because they can go ofw and back to jb mode with a couple of hours of work...

it should be well possible, NANDS has the advantage of having ALL fw in the nands, which means we would not need to swap HDD, so afaik it should be quicker.

#44 - adrianc1982 - 193w ago
adrianc1982's Avatar
I hope we get this method for the fat ps3s, but somehow I doubt it since they have the complete flash in the ps3 and not on the hdd. Correct me if I'm wrong...

But great fo those ps3 slim users because they can go ofw and back to jb mode with a couple of hours of work...

#43 - PS4 News - 193w ago
PS4 News's Avatar
Following up on the initial PS3 Slim 3.70 Downgrade and PS3 3.7x Downgrade for Slims and Fats with NOR Flash news, this weekend Italian PlayStation 3 hackers DiGiTaLAnGeL (linked above) have made available a guide to fast swap PS3 Slim CFW 3.55 to OFW 3.70 with 2 HDDs and ProgSkeet followed by a New Method - PS3 Downgrade v2 Supports all NOR Flash from TwoStone.

To quote, roughly translated: Today I'll write a tutorial to "fast-swap" between CFW 3.55 and OFW 3.70, using 2 HDDs... at the end of the tutorial, you'll be able to swap between the firmware just flashing a dump on your PS3 using Progskeet. (instead of downgrading and losing all data).

The first steps are not so easy, so take your time and go on, by the way, you must have some skill with Progskeet, and it must be 100% working on your console.

What we need:


We need 2 HDD because the NOR flashes stores some parts of the current FW on the HDD so we will need 2 HDDs, one is for 3.55, and one is for 3.70.. We will call those HDD "A" (for 3.70) and "B" (for 3.55) don't mix them up!

Starting with a PS3 Slim with OFW 3.70.

1. Plug in HDD "B", format and prepare it if it's required by the PS3 and you should have your 3.70 up and running.
2. DUMP your actual NOR and call it "original dump 3.70.bin"
3. Now flash your "downgrade.bin" (edited with the personal data found in "original dump 3.70.bin")
4. Turn on your PS3 and be sure that the PS3 is asking you to press the PS button (downgrade.bin flashed correctly )
5. Insert a 3.55 Downgrade dongle and enter factory/service mode.
6. Copy Lv2Diag.self by Jaicrab and the 3.55 NO CHECK UPDATE renamed as "PS3UPDAT.PUP" in the root of your USB Stick.
7. Plug in the USB Stick in the most-right USB port of your PS3 and wait for it to turn OFF.
8. Leave the factory mode using the other Lv2Diag.self
9. After the reboot, you need to configure and set up your system... now you have a fully working 3.55 CFW based on KMEAW "NO CHECK".
10. DUMP your actual NOR and call it "swap dump 3.55.bin"
11. Unplug HDD B and Plug in HDD A.
12. Turn on your PS3, plug in your USB Stick containing official 3.70 update and press start+select when asked.
13. When the PS3 reboots, check that the system is fully working and DUMP your actual NOR and call it "swap dump 3.70.bin".

NOW IT'S OVER! You should have "swap dump 3.55.bin" and "swap dump 3.70.bin" ... Now you just have to swap HDD and flash the corresponding dump:

  • HDD A = swap dump 3.70.bin
  • HDD B = swap dump 3.55.bin

WARNING: Do not install other CFW than the "NO CHECK" one... because it's used to make the "fast-swap" working... if you flash something different you will not be able to go between the 2 FWs. This CFW disable the Syscon checking at the startup... so it will not freeze or complain when the syscon says "3.70″ and your FW is 3.55

In case you wanna update your console with a future "3.80″ or-so firmware. Do not update your console when you are running 3.55 firmware! You have to go to "swap dump 3.70.bin" and then update as usual (XMB or recovery)... By the way, the downgrade is confirmed working only on 3.70... we haven't tested it on other FWs, you could lose the possibility to go back to 3.55!

More PlayStation 3 News...

#42 - elser1 - 193w ago
elser1's Avatar
LOL.. i wish it was my tut mate, but its not... ha

#41 - mushy409 - 193w ago
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I'm still trying elser1's tutorial for 3.6x downgrade with infectus. Any changes I make to the NAND result in YLOD. If I flash the backups back then the console boots normally...

Trying as we speak to flash the 2 x 128Mb modified files and see what happens. Looks like Differential Flashing is a no-go for this. I've tried a few times and it YLOD's my PS3.

#40 - dayv - 193w ago
dayv's Avatar
been stuck on 3.61 since May. Waiting for CFW or downgrade. but this tutorial is not easy to understand.

#39 - NTA - 194w ago
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Ah, I"ll keep this in mind for when I need to update the PS3. Hoping some easier tutorial might come along but until then i'll just have to stick with this...

#38 - oVERSoLDiER - 194w ago
oVERSoLDiER's Avatar
Very nice tutorial. Pitty I only have a few AT64 and no Teensy++ (which is now available at PJRC). I would wait for an more exact tutorial to risk my only one 3.55 on this, but maybe people how already has upgraded their previous 3.55 to 3.70 would try this.