(adsbygoogle = window.adsbygoogle || []).push({}); In this quick tutorial I will cover how to downgrade your PS3 (NOR flash type only) using dospiedra’s latest downgrade method.

You will need the following:

PS3 Fat or Slim (NOR flash type only)
A USB Thumbdrive.
A method to enter your PS3 into Factory Service Mode
Firmware 3.70 OFW (.PUP MD5: 7EE6B91BBD07DDE1E65A0681DE66745B)
You must login or register to view this content.
ProgSkeet Universal Programmer
You must login or register to view this content.
Latest Version of the ProgSkeet Software
You must login or register to view this content.
Downgrade V2 by dospiedra (.RAR MD5: F768F4B0E8BA1D300495C5F6A1CFB1E4)
You must login or register to view this content.
HEX Editor – I will be using HxD (.ZIP MD5: 18DF5E00110513F15882709D06947F95)
You must login or register to view this content.
3.55 CFW No Check by dospiedra (.PUP MD5: 89FEDBF48A4FFEB74F68D30E3E684608
You must login or register to view this content.
1st stage Lv2diag.self by jaicrab (.ZIP MD5: 3499B86C34D2E11D0AF74C7B125B6758
You must login or register to view this content.
2nd stage Lv2diag.self by jaicrab (.RAR MD5: 5A70B6019FD801554305B7A802EB9285)
You must login or register to view this content.

–Tutorial Start–
Step 1: Dump the NOR of your PS3 using the ProgSkeet Device and Software. Make sure you dump your NOR a number of times and verify that both the read is valid and that all the dumps are exactly the same.

Make sure you have ByteSwap checked, so we can eliminate the usage of FlowRebuilder.
Your dump should be exacltly 16,777,216 bytes.
Save the dump as NOR_3.70_OFW.bin for this guide.

You must login or register to view this content.

Spansion NOR: 128KB sector, 128 sectors
Samsung NOR: 4KB sector, 4096 sectors
Macronix NOR: 128KB sector, 128 sectors

Step 2: Open NOR_3.70_OFW.bin with HxD. Make sure OFFSET 200 reads “IFI” and nothing else (otherwise you might need to go back and ByteSwap your dump)

You must login or register to view this content.

Step 3: Open the 6 patches found inside the downgrade v2 archive with HxD.

You must login or register to view this content.

Step 4: Now we want to patch our NOR_3.70_OFW.bin with the 6 patches provided.

patch1: OFFSET 0C0010 LENGTH 6FFFE0
patch2: OFFSET 7C0010 LENGTH 6FFFE0
patch3: OFFSET 80000 LENGTH 20000
patch4: OFFSET A0000 LENGTH 20000
patch5: OFFSET 40000 LENGTH 20000
patch6: OFFSET 60000 LENGTH 20000

For each patch perform the following (using patch 1 as an example):

Open patch1 and select all (ctrl+a) and copy (ctrl+c).
Open NOR_3.70_OFW.bin and goto (ctrl+g) OFFSET 0C0010

You must login or register to view this content.

Paste write with ctrl-b (not Paste Insert! – the file size should never change) the changes you make should be coloured red.

You must login or register to view this content.

Keep repeating (using the different offsets for each patch) until all 6 patches have been applied.

Step 5: Save patched NOR_3.70_OFW.bin as NOR_downgrade.bin

Step 6: Flash NOR_downgrade.bin to the PS3 using the ProgSkeet Device and Software.

Step 7: Turn on the PS3 but do not press anything. Wait 1 minute or so, and remove power from the PS3 - we need to put it into factory service mode.

Step 8: Format a FAT32 thumb-drive and place the following files on it.

usb: \\Lv2diag.self (Get this file from the Lv2Diag-patch-par-Jaicrab.zip archive – ‘\Lv2Diag-patch-par-Jaicrab\STEP1\Lv2diag.self’)
usb: \\PS3UPDAT.PUP (Rename 355checkoff.PUP to PS3UPDAT.PUP)

Step 9: Plug the thumb-drive with the files from step 8 into the right-most USB port on the PS3.

Step 10: Boot the PS3 into Factory Service Mode (see other guides on how to achieve this)

Step 11: Wait for the PS3 to power off automatically (this should take somewhere between 10-20 minutes)

Step 12: Remove the USB from the right-most USB port on the PS3.

Step 13: Power on the PS3 – you should now see the XMB.

Step 14: Shutdown the PS3 again.

Step 15: Replace the first stage Lv2diag.self with the second stage Lv2diag.self on the thumb-drive and re-plug the thumb-drive into the right-most USB port on the PS3.

usb: \\Lv2diag.self (Get this file from the Lv2diag_355.rar archive – ‘\\Lv2diag_355\Archivo 2\Lv2diag.self’)
usb: \\PS3UPDAT.PUP (Keep from before)

Step 16: Power on the PS3 - Wait for the PS3 to power off automatically (this should take somewhere between 10-20 seconds)

Step 17: Remove the USB from the right-most USB port on the PS3.

Step 18: Boot the PS3 and enjoy your 3.55 CFW No Check by dospiedra (equivalent to 3.55 CFW by kweaw)


Credits:
damox's for this tutorial.
and the downloads links
Dospiedras for the method.

Some folks want to pay everything to get online then get back to play free games.

Im try this later

A working downgrade

How? its not released untill next week , and latest news is that it only works on the old models with certain model numbers

i agree 100% try the E3 Flasher before you try this

Im confused on one part, is the Progskeet Universal Programmer like a chip that you put into your ps3 or something? or a computer program? Thats all im confused about.

*Nevermind i figured it out umm, so the E3 jailbreak team is making a usb version of Progskeet?

there wont by any luck be a 3.70cfw,there will be a downgrade but if they did find it,it wont be up for release,if it was it WILL charge.

quick replys rule,saves me 3 mins of my life lol,& ive stopped atm,rented BF2 & cba to data transfer yet.