NAND

Flash memory

File:Hynix flash rom.jpg ries 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/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 this diagram.

Once wired you can read/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 (dev unit)

http://xbox360.1stgame.nl/13.html

Informit.com article

http://www.informit.com/content/images/art_fogie_xbox360/elementLinks/fogie_fig09.jpg

Independent photo

http://images.batlogic.com/albums/c60/mmattsson/xbox360/PDR_0033.jpg

Anandtech article

http://images.anandtech.com/reviews/system/microsoft/xbox360/mb.jpg

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.

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

This chip is a low power 4096 bit serial EEPROM according to the datasheet.