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== Manual dualboot 3.55 & 3.70 with 2 flashdumps and 2 harddrives ==
= Manual dualboot 3.55 & 3.70 with 2 flashdumps and 2 harddrives =
(temporary on talkpage for improving/editing the guide)
 
==Preparation in short==
 
===Getting original and downgrade to 3.55===
# Dump the flash and make sure it is useable for downgrade to 3.55
# Patch it for downgrade
# Reinstall the prepatched PUP (e.g. RogeroV2.pup)
# Redump the flash to make sure it contains the exact same CoreOS prepatched and keep this as '3.55-swap.bin' together with the used harddrive '3.55.HDD'.
 
===Getting latest===
# Update to the latest firmware you want to use (e.g. 3.7x) and reboot to make sure it works fine
# Dump the flash and keep this as '3.7x-swap.bin' together with used different harddrive '3.7x.HDD'.
 
==Swapping==
===When you want to boot to 3.55===
# Reflash '3.55-swap.bin' and insert harddrive '3.55.HDD'.
 
===When you want to boot to 3.7x===
# Reflash '3.7x-swap.bin' and insert harddrive '3.7x.HDD'.
 
 
 
 
 
 
=== Old Guide ===
=== Old Guide ===
[http://www.digitalangel.it/2011/08/tutorial-fast-swap-su-ps3-slim-cfw-3-55-3-70-con-2-hard-disk-e-progskeet/ original italian and english guide posted by digitalangel]
[http://www.digitalangel.it/2011/08/tutorial-fast-swap-su-ps3-slim-cfw-3-55-3-70-con-2-hard-disk-e-progskeet/ original italian and english guide posted by digitalangel]
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WARNING: 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 loose the possibility to go back to 3.55!-
WARNING: 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 loose the possibility to go back to 3.55!-


<span style="color:red!important;">'''Editoral warning:''' The "NoCheck.pup" is known to cause trophy errors, use the [[Downgrading_with_NOR_flasher#Premade_CFW_Rogero_V2 | RogeroV2.pup]] instead or build one yourself with [[PS3MFW Builder]] and the [[Talk:Downgrading_with_NOR_flasher#Combined_TCL_V2 | TCL]] from the NOR downgrader talkpage.</span>
<span style="color:red;">'''Editoral warning:''' The "NoCheck.pup" is known to cause trophy errors, use the [http://www.ps3devwiki.com/index.php?title=Talk:Downgrading_with_NOR_flasher#Premade_CFW_Rogero_V2 RogeroV2.pup] instead or build one yourself with [[PS3MFW Builder]] and the [http://www.ps3devwiki.com/index.php?title=Talk:Downgrading_with_NOR_flasher#Combined_TCL_V2 TCL] from the NOR downgrader talkpage.</span>




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== E3 Fast Dual Boot- OFW 4.xx and CFW 4.xx ==
please do come crying in #ps3downgrade
Just base info, someone please work on, :) or delete....
'''Please Read'''
Thanks and credits
pu6pu6 - ps3hax.net, original brief tutorial
kman28 - ps3hax.net , original fast dual boot guide
everyone in this thread for testing and what not - http://www.ps3hax.net/showthread.php?t=44955
PSdevwiki-especially eussNL
What is needed:
1. If you brick or otherwise damage your PS3, no one but yourself is liable.
2. You will need an E3 flasher.
3. The tristate on the motherboard must be soldered to the SBE point on the e3 flasher with a cable
4. The track between points A and B must be scratched out and a cable soldered between points A and the SBCE point on the E3 flasher. [[Hardware_flashing#Pinout_Gallery | Diagrams]]
5. You must be in a position to install a 3.55 firmware.
'''CFW Setup'''
Plug in your CFW hard drive. Put switch 2 up on the E3, rest down.
Install Rogero 3.55 V7. Preferably via recovery menu. link
Install multiman 4.13 or later. Link
toggle qa-verify, link
Install 4.xx CFW via recovery mode links
Power on ps3 make sure 4.xx CFW is working
Put PS3 off
Change E3 switches as follows:
---SW:FLASHFUN/CFW/BACKUP/MICROSD/OBFLASH---
Click start this will backup the E3 onboard NOR to the microSD
Bytereverse the backup using Flowrebuilder
Apply ONE of the following no-check patches depending on your 4.xx CFW:
4.21 CFW - link
4.30 CFW - link
Link to patchfile
Open win skeet select patcher then select the patch file and input dump.
Once again byte reverse the dump so it can be used with E3 Flasher.
Put the patched and byte reversed dump on the sd card - rename to bkpe3.bin
Before turning ps3 on, set switch to:
---SW:FLASHFUN/CFW/PROG/MICROSD/OBFLASH---
Press start on e3 flasher
Power off ps3
Put only switch 2 up rest down, and turn on. If you receive an error just press the PS button on the controller. Make sure 4.xx CFW is working fine.
Turn ps3 off-unplug the power
'''OFW SETUP'''
PS3 is off
Take microSD out of E3
put in your OFW HDD
set switches to:
---SW:FLASHFUN/OFW/PROG/OBFLASH/PS3FLASH---
Turn PS3 on
Press start on E3
Once done turn off
Put all switches on e3 down
Boot, u will get an error. This is good. Follow prompts and install OFW 4.31
When you want to switch to OFW, put ps3 off-change switch to ofw, plug in OFW HDD, and turn on
When you want to switch to CFW put ps3 off-change switch to cfw, plug in CFW HDD, and turn on
== Software Talk ==
Software wise from GameOS it would be possible to switch OS Bank, booting into a different Lv0->Lv1->Lv2.<br>
Theory: <br>
To switch back it is required being the other Bank modified not being original firmware files for getting access to Lv2 Syscalls, specifically accessing EEPROM.<br>
Newer (patched) CoreOS theoretically '''could''' run older dev_flash version - to a certain degree.
=== EEPROM ===
{|class="wikitable"
|-
! Offset !! size !! Notes
|-
|0x48C24|| 1||Bank #0 OS-Flag (ros0 if 0xFF else ros1)
|-
|0x48C25|| 1||Bank #0 rvkprg-Flag
|-
|0x48C26|| 1||Bank #0 rvkpkg-Flag
|-
|0x48C27|| 1||Bank #1 OS-Flag
|-
|0x48C28|| 1||Bank #1 rvkprg-Flag
|-
|0x48C29|| 1||Bank #1 rvkpkg-Flag
|-
|-
|}
|}
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