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Sega Naomi Gd-Rom10/5/2020
It is similar to the standard CD-ROM except that the pits on the disc are packed more closely together, resulting in a higher storage capacity: around 1.2 gigabytes, which is almost double the storage capacity of a typical CD-ROM.It is also used for the Sega Chihiro system board and can also be used by the SegaNintendoNamco Triforce system board.The first is in conventional CD format, and usually contains an audio track with a warning that the disc is for use on a Dreamcast, not an ordinary CD player.
This audio track often uses the games characters voices in a lighthearted or humorous message (for example, Skies of Arcadia gives the message We cant save the world from a CD player, so put us back in the Dreamcast so we can do our job). The CD section also contains a data segment, readable in PCs. Although most discs include only text files identifying the game, its copyright and bibliography, some contain bonus material for home computer users (for example, Sonic Adventure contains images of Sonic characters to use on the desktop). ![]() The final (outer) section of the disc contains the game data itself in a higher density format. This section is 112 minutes long, with a data size of 1.2 GiB. With modified firmware that looks for a second TOC in the high-density region it is possible to read data from the high-density region even on a normal CD-reader. One can also utilize a swap-trick by first letting the CD-reader read the TOC from a normal CD with a large track and then swapping that disc with a GD-ROM in a way that avoids alerting the CD-reader that a new disc has been inserted. It is then possible to read as much data from the high-density region as indicated by the TOC from the first disc. Sega achieved the higher density by decreasing the speed of the disc to half and by letting the standard CD-ROM components read at the normal rate thus nearly doubling the discs data density. This method allowed Sega to use cheaper off-the-shelf components when building the Dreamcast. Sega Naomi Gd-Rom Driver For LinuxA port of that driver for Linux exists, though due to licencing issues and the poor compatibility of that driver with Linux kernel interfaces, a new Linux driver is under development.
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