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+If you search "MN102 Datasheet" on google and scroll for long enough you will find references to a debug interface called a "Serial Writer". This is the interface used by 9 & 6 wire mod chips to patch the drives firmware. +
[[File:Drive.jpeg|thumb|right|The disc drive.]]
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+The disc drive is a component in the Wii. It is designed to read DVDs in specific, unlike a wide variety of DVD drives, the Wii's drive does not support CDs. The drive has a locking mechanism in the center, which pulls down when a disc is inserted. There are also latching mechanisms, which pull back for Wii discs, and stay in place for holding GameCube discs.
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== MN102 Serial Writer ==
== MN102 Serial Writer ==
−This is the interface used by 9 & 6 wire mod chips to patch the drives firmware.
It looks as though Matsushita tried to disable this interface in the D2C and newer drive controllers. A clock glitch allowed mod chip vendors to defeat this protection and use the "Serial Writer" to inject firmware.
It looks as though Matsushita tried to disable this interface in the D2C and newer drive controllers. A clock glitch allowed mod chip vendors to defeat this protection and use the "Serial Writer" to inject firmware.