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File:Atmel2.jpg | File:Atmel2.jpg | ||
Atmel 528 serial EEPROM.This chip reads: | Atmel 528 serial EEPROM.This chip reads: | ||
ATMEL528 | ATMEL528 | ||
24C04N | |||
24C04N | SU18 | ||
SU18 | |||
Datasheet can be found here: | Datasheet can be found here: |
Revision as of 00:27, 12 March 2010
Flash memory
File:Hynix flash rom.jpg Hynix HY27US08281A flash ROM device.It is believed the flash memory stores the Dash and other "Upgradeable" pieces of 360 Software.
The HYNIX HY27US08281A series is a 16Mx8bit with spare 4M bit capacity.
Datasheet of it: http://www.hynix.com/datasheet/pdf/flash/HY27US(08_16)281A%20Series(Rev0.6).pdf
SMT socket that should work if you choose to remove yours: http://www.emulation.com/cgi-cfm/insert_quantity.cfm?part_number=S%2DTSO%2DSM%2D048%2DA,
Attached to southbridge
Reading and Writing
The Flash can be written or read using a number of methods. If you have the old shader hack running the easiest is using lflash. You can also wire lpt directly to the flash using the diagram below.
http://img19.imageshack.us/img19/5198/wiringforxenondiagram.jpg
Once wired you can read or write to the chip using software such as NandPro.
Sectors
•1 copyright notice, zeros, unencrypted numbers
•2 encrypted data
@2MB filesystem, unencrypted, but content encrypted, config not
Small flash chip close to CPU
Some 360's also have a small flash chip near the CPU, as seen in these pictures:
•1stgame article (a developer unit)
•informit.com article
•independent photo
•Anandtech article Not all boxes do have this chip. It does not seem to be core/premium related.
Here is a picture of a premium box without the chip:
•[1]
Here is a high-res picture of a premium box with the chip:
•[2]
As discussed in this article on the xboxhacker.net forums, this appears to be a Atmel 25020 EEPROM. The chip from the xbox360.1stgame.nl article reads:
ATMEL524 25020AN SU18 Datasheet can be found here:
•http://www.atmel.com/dyn/resources/prod_documents/doc3348.pdf This chip is a low power 2048 bit serial EEPROM according to the datasheet.
•If the small chip near the cpu is removed the xbox will boot up and function just fine [Darkmoon 360 experiments]
•According to IBM the CPU has "an interface for a serial EEPROM in case patch logic configuration was needed during bring-up".
Small flash chip on front panel
There is another Atmel chip on the front panel:
File:Atmel2.jpg
Atmel 528 serial EEPROM.This chip reads:
ATMEL528 24C04N SU18
Datasheet can be found here:
•http://www.atmel.com/dyn/resources/prod_documents/doc0180.pdf This chip is a low power 4096 bit serial EEPROM according to the datasheet.