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August 20, 2011 // 12:17 pm - 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!


Guide: PS3 Slim CFW 3.55 to OFW 3.70 with 2 HDDs Fast Swap

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#57 - joffe - August 23, 2011 // 6:04 am
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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...

This method should also work for CECHH and later FAT models - they have also 16MB NOR-flash. Fatties CECHA..CECHG need another method.
Quote Originally Posted by adrianc1982 View Post
But great fo those ps3 slim users because they can go ofw and back to jb mode with a couple of hours of work...

Swapping HD and flashing proper image.bin won't take hours. Cool would be to glue a PCB with 16MB NOR flash and connector to HD so you would swap the proper flash the same time you swap the HD
Quote Originally Posted by HeyManHRU View Post
There is no need to use this tutorial if you have Kmeaw CFW.

With this method you can use CFW with it's advantages or swap to 3.70 and go onlline.

#56 - mushy409 - August 23, 2011 // 3:55 am
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Quote Originally Posted by clementz View Post
How about new type of ps3 slim? Does this working with the new ones?

No, the Infectus downgrade method is for the older NAND consoles. The new consoles are NOR based which require a progskeet or similar to interface with the flash.
Quote Originally Posted by tysinb View Post
can we make CFW from this just wondering?

No, no, no.... This is simply to downgrade your console to the 'special' firmware versions (for jailbreaking/installing CFW) such as 3.41 or 3.55 (or whichever you choose)

#55 - tysinb - August 23, 2011 // 2:47 am
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can we make CFW from this just wondering?

#54 - clementz - August 21, 2011 // 7:49 pm
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How about new type of ps3 slim? Does this working with the new ones?

#53 - EiKii - August 21, 2011 // 2:03 am
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hello, uf6667 has said he's working on a solderless, there is videos out on one, it will be ready when its ready

#52 - HACKDEPS3 - August 21, 2011 // 1:14 am
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someone needs to figure out how to make something that you can place over the processor and hook in to it with out soldering make something like a bottle cap for it so that all you got to do is place over the processor and lock it over the processor.. it cant be that hard.

think how they got other computers and that might help. what needs to be done is make a mold of the processor and design a cap that locks on the processor and after that more people will buy the mod chip i know this is what everybody is waiting for because they don't want to miss up their ps3 make the cap for the processor.

#51 - Ezio - August 21, 2011 // 12:38 am
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This is the video of tutorial: http://www.ps4news.com/forums/ps3-hacks-jailbreak/ps3-firmware-3-6x-downgrade-via-infectus-waninkoko-brick-fix-119945-4.html#post382867

#50 - elser1 - August 20, 2011 // 10:26 pm
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thats kool.. i just got to get me a prog skeet man!!

#49 - HeyManHRU - August 20, 2011 // 9:02 pm
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Quote Originally Posted by HeyManHRU View Post
There is no need to use this tutorial if you have Kmeaw CFW.

(If you're referring to the guide on the First page)
Quote Originally Posted by Pcsx2006 View Post
Nice tutorial btw its too difficult for an average joe like me.

Yeah, might get a friend to do it for me

#48 - Pcsx2006 - August 20, 2011 // 9:00 pm
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Nice tutorial btw its too difficult for an average joe like me.