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.
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!
Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!
To quote, roughly translated: Hello, I've been working on this project about two months now since I've gotten to work as public so that everyone can use, this tutorial is for consoles with 256MB NAND flash does not mean it does not work in 16MB in itself is changed almost the same in those with normal flash, but because even I have my fat 16mb 80GB I have not been able to neither prove nor verified.
Nougat (the phrase I owe to some forero around here that I really liked the expression):
With INFECTUS flash0.bin and we get our nand flash1.bin as in the tutorial to repair bad lukin nands do the same process until we get our dump flashfinal.bin 256MB nand we open this with a simple hex editor and look for this part editor:
"00 00 00 00 00 00 00 00 00 00 00 00 00 6F FF E0"
You will see that just under a very similar line, I find this data in the offset 000C0020 may vary according to the nand and the party starts here
EVEN replace that line with the file if you use the hxd 1patchcos.bin get in the first 0 of the line -> right click and paste, writing before you have to have an open 1patchcos.bin hxd in hex and copy its contents to can paste.. then we find the second file to patch at hxd we dump on our part:
Then we take the option we use reescramble flowrebuilder this dump so we rebuild our flash0.ECC.bin and flash1.ECC.bin and flash the result, when you finish you will notice that the PS3 now has a nice on but black screen, it cojemos our factory jig to put it into service mode and put it in factory, then the typical cojemos lv2diag of yore and the pup you please.
(NOTE: the first pup that metais will stay in the console as the minimum version that you can downgrade then, if you want to lose 3.55 to 3.41 then you will have to put the pup up to 3.41 before 3.55 or 3.55 will remain in that if cost will not rewrite the dump again to downgrade to lower the pup that you put the first time.)
Then you put your factory lv2diag to leave the service and you're
Note: this applies to repair the brick Waninkoko NAND not plates even sem-001 (tested) (and step downgrade )
All channel # irc-hispano darkps3 for supporting me for so long
To donate the INFECTUS austaquio32 to achieve to continue with my project
To Nodial2ne paid for the help locating files in the nand
To robs1 for helping throughout the process with ideas to make this possible
And everyone who was patient and not by private haunts me
er_poty: I do post, post it comes to creating private fights and telling him to send me get to the bottom of the shoes PDNKED
pd: I have 4 years unemployed, who selflessly want to donate something please contact me via private (sorry but I have 2 children and the PS3 does not give me to eat me or them ) either that or give me a job lene!
PS3's compatible with this method (thanks pdnked)
CECH = 256MB
CECHB = 256MB
CECHC = 256MB
CECH = 256MB
CECHG = 256MB