Developer dospiedras1973 from elotrolado has released the steps to take in order to downgrade your PS3 using a hardware flasher device like ProgSkeet or Teensy++ for those that own PS3 models that are using the 16mb NOR Flash. What you will need is a PS3 fat or slim updated to standard v3.70 firmware, a ProgSkeet or Teensy++, hxd program, and a file available to download called Downgrade.bin. Make sure the PS3 is on firmware v3.70 and not any other firmware. Do not try any other version as that has not been tested. As always use with caution and make sure you know what you are doing before attempting this. Below is a rough translation from elotrolado.

hello all, I got it at the end we have a downgrader for slim consoles this time is different than it has done with consoles fat, I’ve got the two flashers progskeet Teensy + + and Al nougat!

We need:

fat or slim console with updated standards to 3.70 “DO NOT TRY TO ANOTHER VERSION”
Solution to write and read the rules of the console (or flasher progskeet teensy + +)
hxd program (which I use to edit hex)
FlowRebuilder v.4.1.3.2
a beer (this is important)
Http://pastebin.com/yuvJ5Leh Downgrade.bin

First dumped our NOR flash, the file must accurately measure “16,777,216 bytes” neither more nor less Draw out several to be absolutely sure of what you do

cojemos the dump “example josejuan.bin”

and we have to introduce it in a file flowrebuilder to make it readable (bytereverse) the option is called bytereverse dump and extract rules

what we do and we will create a file but the extension ends in. bin.REV

open it with the hxd and took our personal data to the console EID, BOOTLOADER, CSID and METLDR no need to put any more

take them out as follows:
choose for example in this case to stick our METLDR prepatched to downgrade the image attached to this tutorial

inside the folder where we put the flowrebuilder. rev also has created another folder called “nombredeldump.EXT”
then there are our personal archives of our console and we need to introduce them to catch some pre-patched image that I have since opened the hxd and open the file and metldr downgrade.bin is inside the folder asecure_loader
choose the tab on the hxd metldr and copy the entire contents into HEX and enter the downgrade.bin
press control + 820 g write position is that of METLDR
right-click on the first line of position 820 to give to “stick type” and so the same way we introduce others to enter the files are:
METLDR: offset“810″ size “E960″
BOOTLOADER_0 Position “FC0000″ size “40000″
EID: Position “2F000″ size “10000″
CISD: Position “3F000″ size “800″

then we take the downgrade.bin with saved changes and we put in the option flowrebuilder bytereverse dump and extract rules PROGRAM THIS TIME WE WILL GIVE AN ERROR but is a normal error, if error occurs is that okay done and you create a file named downgrade.bin.REV will be the file you have to enter in the console “flash”

if all went well to finish writing you kindle the console and will press the button or English ps ps push button NO NOTHING PULSEIS apagais the console and put it in factory service mode once this need to put the correct file system for 3.55 jaicrab with lv2diag of cfw without reader and a special

lv2diag:
http://www.logic-sunrise.com/telecharge … icrab.html

cfw: http://pastebin.com/03MFDLGV

kindle the console with the stick with these two files on the usb device into the far right of the console and shut down one to 10 / 15 minutes, kindle the console without any usb connected to verify that you correctly leads to xmb If all went well apagais the console and you put your lv2diag FILE2 of this pack:

http://pastebin.com/gGETcxMR

the console will turn on and 20 seconds will turn itself off and CONGRATULATIONS you have your console in functional kmeaw cfw 3.55 100% 100

Thanks:

DiGiTaLAnGeL (Tester with progskeet)
Glevand & mfw builder team (cfw)
NDT (Assistant) is a very good person
JaiCraB (lv2diag without reader)
Robs1 (my guide with the normal flash)
EussNL (his great support in the wiki that I use every day PS3DEVWIKI.COM)
Defyboy (to create ps3devwiki)
A whole channel # irc-hispano.org darkps3 for their support and many hours of testing we have hit bastards eh!
DemonHades (because if you had not put the cover on your website with the lie that contastes on me, I had not met or uf6667 DigitalAngel and these two helped me a lot)

and finally the people have asked me for a private place to donate paypal button, because here it is.

greetings and set aside now will resume my work with the dual nand and dump 3.6x gives me so many problems jejej

Update #1:  It appears that there was a mistake on the tutorial about the METLDR.  It originally read METLDR: Position “820″ size “EDE0″ and have been changed to METLDR: offset“810″ size “E960″.  We have already changed it above.  This is a very important update, so make sure to follow the tutorial carefully if you are attempting this.  If anyone does attempt it, let us know the results.

Originally Posted by dospiedras1973;

PLEASE UPDATE NOTICE:

i fixed metldr location and leght please update

METLDR : offset “810″ size “E960″

this is dangerous error! please fix in the mainpage

Update #2: For those looking to simplify the downgrading process just a bit, here’s a PC tool that you can use to automate the modification of downgrade.bin file.

dospiedras1973 says:

psicoleo, uf6667 and I have made an application to automate the use hex editors to modify the downgrade.bin

http://www.multiupload.com/AE8W5HADWM

bytereversed you put your flash in donor and recipient and will downgrade.bin in the process hxd without … xD

you not need hex edit anymore…

and “If at any time during the downgrade DISPLAY RED (RSOD) STOP PROCESS IMMEDIATELY I WILL RELEASE A FIX SOON” Please be patient.

Update #3:  Here is the video by DiGiTaLAnGeL on PS3 slim v3.70 downgrade using ProgSkeet.

source Elotrolado, PSX Scene, PS3crunch