Nintendo optical discs
Nintendo optical discs are physical media used to distribute video games on three of Nintendo's consoles that followed the Nintendo 64. These are the GameCube Game Disc, Wii Optical Disc, and Wii U Optical Disc. The physical size of a GameCube Game Disc is that of a miniDVD; the Wii and Wii U Optical Discs are the size of a DVD, a CD, and a Blu-ray. To maintain backward compatibility between generations of game consoles, GameCube discs are compatible with the first model of the Wii, and Wii Optical Discs are compatible with the Wii U. A burst cutting area is located at the inner ring of the disc surface.
|Media type||Read-only optical disc|
GameCube Game DiscEdit
The GameCube Game Disc (DOL-006) is the game medium for the GameCube, created by Matsushita/Panasonic, and later extended for use in the backward compatibility mode of the first model of Wii. The GameCube is Nintendo's first optical disc console, after mainly ROM cartridge based platforms. The GameCube Game Disc is a 1.46 GB, 8 cm miniDVD-based technology which reads at a constant angular velocity (CAV). It was chosen by Nintendo to prevent copyright infringement of its games, to reduce manufacturing costs compared to Nintendo 64 Game Paks, and to avoid licensing fees to the DVD Forum. GameCube Game Discs do not use the Content Scramble System found on normal DVD-Video discs, as Nintendo was not satisfied with its level of security.
Some GameCube games with large amounts of data span two discs, such as Resident Evil 4, Enter the Matrix, and Tales of Symphonia. Some multi-platform games that fit on single discs for PlayStation 2 and Xbox had certain features removed in order to fit on GameCube Game Discs. Full-motion video (FMV) scenes and audio clips have higher compression or lower quality to fit on a single disc.
Wii Optical DiscEdit
The Wii Optical Disc (RVL-006) is the physical game medium for the Wii, created by Panasonic. Nintendo extended its proprietary technology to use a full size 12 cm, 4.7/8.54 GB DVD-based disc, retaining the benefits of the GameCube Game Disc, and adding the standard capacity of a double-layer DVD-ROM. Wii Discs can include updates to the Wii system software, which are installed before starting the game, ensuring that systems not connected to the internet are still updated. For the same reasons as GameCube and Wii U, Wii cannot play DVD movies or CDs.
The Wii can use double-layer discs, and all games are single-layer prior to the release of Super Smash Bros. Brawl. Upon that release, Nintendo admitted that some Wii systems may have trouble reading dual-layer discs due to a dirty laser lens. Nintendo repaired systems with dual-layer problems, and later released a disc cleaning kit for users to purchase.
Wii U Optical DiscEdit
The Wii U Optical Disc (WUP-006) is the retail physical game medium for the Wii U, with a capacity of 25 GB. The Wii U system software is backward compatible with Wii Optical Discs, but not with GameCube game discs. The Wii U Optical Discs differ in appearance from most other optical discs in that they have soft, rounded edges.
The console's optical drive was developed and supplied by Panasonic, a founding member in the Blu-ray Disc Association. It is not clear whether the Wii U Optical Disc is similar in physical design to the Blu-ray physical disc specification.[clarification needed] Nintendo president Satoru Iwata stated, "Wii U does not have DVD or Blu-ray playback capabilities. The reason for that is that we feel that enough people already have devices that are capable of playing DVDs and Blu-ray, such that it didn't warrant the cost involved to build that functionality into the Wii U console because of the patents related to those technologies". Like with the GameCube and Wii optical discs, it was chosen by Nintendo to prevent copyright infringement of games, to reduce cost by avoiding licensing fees to the Blu-ray Disc Association (BDA), and to reduce loading times. This also prevents the console from being modified into a DVD or Blu-ray movie player.
Burst cutting areaEdit
Each Nintendo optical disc contains a burst cutting area (BCA) mark, a type of barcode that is written to the disc with a YAG laser. The data stored in this BCA mark includes an encrypted table related to the hardware-based copy-protection mechanics, in addition to 64 bytes of un-encrypted user-accessible data.
A BCA mark is visible to the naked eye. It is different than the IFPI mark that is on all optical discs. BCA is described in Annex K of the physical specification, and can be seen between radius 22.3±0.4 mm and 23.5±0.5 mm. There are also six additional evenly spaced small cuts, visible with a strong light source, located just outside the BCA radius, which are related to the copy-protection. Their value as a copy protection mechanism diminished after Datel discovered that the same pattern could be recorded into the DVD instead of needing to be precisely cut later.
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