Downgrading with linux: Difference between revisions
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'''Use this method to install lower firmware! You can install a newer firmware ex 3.60 with this method but you will be loosing your hombrew''' | '''Use this method to install lower firmware! You can install a newer firmware ex 3.60 with this method but you will be loosing your hombrew''' | ||
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= Downgrade Method - Emulating JIG with Linux = | |||
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= '''ALTERNATIVE METHOD - not tested''' = | |||
'''1st step''' – Enabling product mode | '''1st step''' – Enabling product mode | ||
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'''This step is really important, if Produc Mode isn´t disabled you will need a dongle to get out of it''' | '''This step is really important, if Produc Mode isn´t disabled you will need a dongle to get out of it''' | ||
=Install debug firmware= | |||
'''To install debug firmware, te proper syscon eeprom flags should be set http://www.ps3devwiki.com/index.php?title=Hypervisor_Reverse_Engineering#EEPROM_Offset_Table and EID0 should be resigned, reencrypted and rehashed with the proper target id ''' | |||
eEID contains | |||
*system model data | |||
*target ID | |||
*PS3 motherboard revision | |||
Revision as of 16:48, 2 April 2011
You should have grafchokolos modules, and patches installed
This works on 3.55 without a fisical dongle
Use this method to install lower firmware! You can install a newer firmware ex 3.60 with this method but you will be loosing your hombrew
Thanks to graf_chokolo for bringing linux, with all this goodies back to the PS3
Downgrade Method - Emulating JIG with Linux
1st step – Generating a challenge
- ps3dm_usb_dongle_auth /dev/ps3dmproxy gen_challenge
2nd step – Generating a valid response for a challenge
You need a dongle id. Valid range for dongle IDs is 0×0000 – 0xffff. So choose one, doesn’t matter which one, but some are revoked !!!
- ps3dm_usb_dongle_auth /dev/ps3dmproxy gen_resp 0xBABE “here is a challenge like this 0xXX 0xXX … of size 20 bytes”
3rd step – Verifying response (Enabling “Product Mode”)
- ps3dm_usb_dongle_auth /dev/ps3dmproxy verify_resp 0xBABE
“here is the response from step 2 like this 0xXX 0xXX … of size 20 bytes”
4th step – Checking if “Product Mode” is enabled
The returned value shouldn’t be 0xff.
- ps3dm_um /dev/ps3dmproxy read_eprom 0x48C07
5th step - Inspect if CORE_OS_PACKAGE.pkg isn´t damaged
ps3dm_um /dev/ps3dmproxy inspect_pkg 1 0x9 CORE_OS_PACKAGE.pkg
6th step - Install CORE_OS_PACKAGE.pkg
ps3dm_um /dev/ps3dmproxy update_pkg 1 0x9 CORE_OS_PACKAGE.pkg
7th step – Disabling “Product Mode”
- ps3dm_um /dev/ps3dmproxy write_eprom 0x48C07 0xff
This step is really important, if Produc Mode isn´t disabled you will need a dongle to get out of it
ALTERNATIVE METHOD - not tested
1st step – Enabling product mode
- ps3dm_um /dev/ps3dmproxy write_eprom 0x48C07 0xfe
2th step – Checking if “Product Mode” is enabled
The returned value shouldn’t be 0xff.
- ps3dm_um /dev/ps3dmproxy read_eprom 0x48C07
3th step - Inspect if CORE_OS_PACKAGE.pkg isn´t damaged
ps3dm_um /dev/ps3dmproxy inspect_pkg 1 0x9 CORE_OS_PACKAGE.pkg
4th step - Install CORE_OS_PACKAGE.pkg
ps3dm_um /dev/ps3dmproxy update_pkg 1 0x9 CORE_OS_PACKAGE.pkg
5th step – Disabling “Product Mode”
- ps3dm_um /dev/ps3dmproxy write_eprom 0x48C07 0xff
This step is really important, if Produc Mode isn´t disabled you will need a dongle to get out of it
Install debug firmware
To install debug firmware, te proper syscon eeprom flags should be set http://www.ps3devwiki.com/index.php?title=Hypervisor_Reverse_Engineering#EEPROM_Offset_Table and EID0 should be resigned, reencrypted and rehashed with the proper target id
eEID contains
- system model data
- target ID
- PS3 motherboard revision