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Dreamcast es la séptima y última videoconsola de sobremesa producida por Sega, fue desarrollada en cooperación con Hitachi yMicrosoft. La Dreamcast es la sucesora de la Sega Saturn y fue lanzada al mercado para ganar terreno a la Playstation de Sony y la Nintendo 64 de Nintendo, y competir con los sistemas sucesores a estos. Pertenece a la sexta generación de consolas. Se detuvo su producción en marzo de 2002 tras la decisión de Sega de dedicarse en exclusiva a la programación de videojuegos.
Sus principales características son: su lector óptico GD-ROM y su procesador Hitachi. El sistema fue el segundo, después de su predecesora, Sega Saturn en tener un módem incorporado para jugar on-line. En esta versión, el modem se mejoró y se pudo usar además en Latinoamérica.
Este sistema de videojuegos fue pensado para recuperar el mercado perdido ante PlayStation de Sony y así recobrar la reputación perdida con Sega Saturn. Se equipó a la consola de una unidad óptica especial que maneja un formato de discos ópticos llamadosGD-ROM y por último su diseño fue enfocado para el juego en línea, como Xbox (consola posterior). La consola tuvo buena aceptación en sus primeros días de estreno pero en pleno auge Sega la retira del mercado porque la compañía sufría problemas internos y económicos.
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Sega Dreamcast: how its security works and how it was hacked.
BY ACID_SNAKE · NOVEMBER 12, 2012
It is commonly said that the Sega Dreamcast had no security at all and that’s why you could play burned games out of the box.
Well in this article I’m going to dismantle this belief and show you why the Dreamcast did have security and why it was unnecessary to overcome this security to get backup games working.
First, trying to load a 1:1 copy of a Dreamcast game will end in failure because the DC’s security system will detect it, so how did hackers managed to boot games? The answer lies in one of the Dreamcast’s many features that ended up unused due to the console’s short life: Mil CD.
Mil-CD was system that Sega developed to add software contents to multimedia discs, for example, more advanced menus, browsers, amongst other apps. But like I said, this feature was never officially used, as a matter of fact, it was disabled on latest versions of the Dreamcast.
The reason for this removal is because Mil-CD was used to fool the dreamcast into booting burned commercial games. In other words, the dreamcast was able to boot these games because they posed as Mil-CD, instead of burned backups. This is similar to ESR on the Ps2, ESR patches the disc and tricks the Ps2 system into thinking the burned disc is a DVD-Video, instead of a Ps2 game.
Like I said above, the latest hardware revision of the Dreamcast still had Mil-CD code, but the playback of Mil-CD is disabled (much like the Ps3, which still has the ps2_emu, but disabled), this revision was v2 (there were three DC revisions: v0, v1 and v2) and you require a modchip to play burned games. You can easily identify a Dreamcast revision by looking for the number 0/1/2 under it.
Not only did the Dreamcast have security when booting burned CDs, it also had security on the official discs too. Just like the Gamecube, Wii and Wii U, the Dreamcast used a special type of discs called GD-Rom (Gigabyte Disc). These discs used the exact same technology as CDs, but differ in that the tracks are closer to each other, giving the disc approximately 1.2Gb of capacity. The layout of these discs made it impossible to dump.
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