If you have an Xbox 360 you need to read this!
“It explains how you can piggyback a SST39sf020a flashrom onto the Xbox360 TS-H943 DVD drive, so you have 2 firmwares chips on the drive and you can easily switch (for example) between the original DVD firmware and Commodore4Evas Xtreme firmware for the TS-H943 Xbox 360 DVD drive.”
Via: I Hacked-Edge
How to Install a Dualboot Homebrew Firmware Mod on the TS–H943 DVD drive
