NAND

NAND Flash with 16Mx8bit and spare 4M bit capacity

Flash memory

• Datasheet

• 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. As well, you can build your own USB SPI Flasher with this diagram and use these binaries. Flash the PicXboot.hex to your PIC, then use the programmer from this picflash to flash the picflash.hex to the PIC through USB in bootloader mode. Once the device is flashed, you can then install it using the drivers from NandPro or use TeamXecuters NANDX drivers.

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

NAND File System

Informations about the Filesystem on the Xbox360 NAND Flash can be found here

Small flash chip close to CPU

Some 360s have a small flash chip near the CPU, some don't as seen in the following pictures.

No chip:

•

Here is a high-res picture of a premium box with the chip:

•

As discussed in this article on the xboxhacker.net forums, this appears to be a Atmel 25020 EEPROM. The chip model 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.