How to Downgrade v3.70 to v3.55 for use with Teensy++ OR ProgSkeet
Damox has released an English version of Dospiedras‘3.70 Downgrade v2. deluxe-lv.com Now compatible with all NOR FLASH, you can use this guide along with a ProgSkeet, or Teensy++ to Downgrade v3.70 to v3.55. For more information on the previous method, visit the old article here. Thank you to damox for granting us permission to reproduce this wonderful guide here on 3dsmall.us
3.70 - Downgrade v2
Playstation 3 Downgrade v3.70 to v3.55
This quick tutorial I will cover how to Downgrade v3.70 to v3.55 (NOR flash type only) using dospiedra’s latest downgrade method.
You will need the following How to Downgrade v3.70 to v3.55:
- 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)
- ProgSkeet Universal Programmer
- Latest Version of the ProgSkeet Software
- Downgrade V2 by dospiedra (.RAR MD5: F768F4B0E8BA1D300495C5F6A1CFB1E4)
- HEX Editor – I will be using HxD (.ZIP MD5: 18DF5E00110513F15882709D06947F95)
- 3.55 CFW No Check by dospiedra (.PUP MD5: 89FEDBF48A4FFEB74F68D30E3E684608)
- 1st stage Lv2diag.self by jaicrab (.ZIP MD5: 3499B86C34D2E11D0AF74C7B125B6758)
- 2nd stage Lv2diag.self by jaicrab (.RAR MD5: 5A70B6019FD801554305B7A802EB9285)
–Tutorial Start for Downgrade v3.70 to v3.55
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.
Dump the NOR of your PS3 using the ProgSkeet Device and Software
- 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)
Open NOR_3.70_OFW.bin with HxD
Step 3: Open the 6 patches found inside the Downgrade v3.70 to v3.55 archive with HxD.
Open the 6 patches found inside the downgrade v2 archive with HxD
lv-peak.com 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
Now we want to patch our NOR_3.70_OFW.bin with the 6 patches provided
- Paste write with ctrl-b (not Paste Insert! – the file size should never change) the changes you make should be coloured red.
the file size should never change
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)
PS3 Slim Downgrade v3.70 to v3.55 using ProgSkeet
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