Green Book (CD standard) Green Book (CD standard) The "Green Book", formally known as the "CD-i Full Functional Specification", is a CD standard announced in 1986 by Philips and Sony that defines the format for interactive, multimedia compact discs designed for CD-i players. The standard was originally not freely available and had to be licensed from Philips. However, the 1994 version of the standard was eventually made available free by Philips. CD-i discs conform to the "Red Book" specification of audio CDs (CD-DA). Tracks on a CD-i's program area can be CD-DA tracks or CD-i tracks, but the first track must always be a
Philips CD-i Philips encouraged MS-DOS and console developers to create games, introduced a $250 peripheral with more memory and support for full-motion video, and added to new consoles a second controller port for multiplayer games. The attempts to develop a foothold in the games market were unsuccessful, as the system was designed strictly as a multimedia player and thus was under-powered compared to other gaming platforms on the market in most respects. Earlier CD-i games included entries in popular Nintendo franchises, although those games were not developed by Nintendo. Specifically, a "Mario" game (titled "Hotel Mario"), and three "Legend of Zelda" games