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Xtreme firmware for TS-H943 Xbox 360
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Here it is, the long awaited World first Xbox 360 backup firmware modification to boot all game backups!

Features
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Boots all Xtreme Xbox 360 backups
Boots all Xtreme Xbox 1 backups
Boots all Xbox 360 originals
Boots all Xbox 1 originals on Xbox 360
Xtreme0800 extraction firmware enables drive to function natively under Windows without any hardware conversion/adaptors
Use on Xbox Live at own risk

Technical details
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Reads Xbox 360 security sector from PSN 04FB1F (Layer 0)
Reads Xbox 1 security sector from PSN 605FF (Layer 0)
Security sector must be extrated using Xtreme0800 360 firmware for Xbox360 games and Xbox 1 games
Will not boot Xbox 1 backups made with Xbox1 605b 0800 firmware (maybe in future release)

Flashing your drive
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Advisable to make a backup of your dvd drive firmware first.("mtkflash r /m orig.bin")
Please make sure you hexedit the Xtreme.bin firmware (Not Xtrm0800.bin firmware) to include your dvd drive key from your original firmware (usually at $4000-4200).
Plug SATA cable from DVD drive to PC. Power cable drive still connected to Xbox 360
Power on Xbox 360
Power on PC
Boot with standard dos boot disk with included mtkflash utility
Run "mtkflash w /m firmwarename.bin" with relevant firmware file (Xtreme.bin for running backups or Xtrm0800.bin for security sector extraction)

Extracting Security Sector
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Ensure DVD drive has been flashed with Xtrm0800.bin firmware. Drive can now work under Windows.
Insert original game disk into drive and wait for windows to detect disk change
Run DVDinfoPro
Enter the following four custom cdb commands:

AD 00 FF 02 FD FF FE 00 08 00 01 C0
AD 00 FF 02 FD FF FE 00 08 00 03 C0
AD 00 FF 02 FD FF FE 00 08 00 05 C0
AD 00 FF 02 FD FF FE 00 08 00 07 C0

Then save hexadecimal display as bin file as SS.bin