---Blank GD-R Dreamcast Dev Development GD-ROM Naomi DC ***Ultra Rare! Free Shipping!*** Start Price USD 23.90 Current Price USD 23.90 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Saturday, November 22, 2008 End Time Tuesday, November 25, 2008 Location Winchester, Massachusetts See more about '---Blank GD-R Dreamcast Dev Development GD-ROM Naomi DC' Description You are bidding on a NEW Blank GD-R. This type of disc was used by developers to burn beta versions of there Dreamcast games during game production. These discs were never sold commercially and are extremely rare because the only way to receive them was to be an Official Dreamcast game developer between 1998-2002. Even if you have no method for burning this disc it makes a great collectible for any hardcore Dreamcast fan and it is sure to increase value overtime. The disc you are bidding on is new and was sealed in a spindle when I received it from a now defunct video game developer. Will be packaged securely in a CD case with lots of foam and bubble wrap around the case. MUST HAVE VERIFIED ADDRESS. PAYPAL ONLY. More information about the GD-R/GD-ROM discs.GD-ROM is the proprietary optical disc format used by the Sega Dreamcast. 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. The format was developed for Sega by Yamaha. GD-ROM was also made available as an upgrade for the Dreamcast's arcade cousin, the Sega NAOMI, providing alternate media to its cartridge-based software. It is also used for the Sega Chihiro system board. There are 3 data areas on a GD-ROM disc There are 3 data areas on a GD-ROM disc. 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. 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. There then follows a separator track which contains no data except for the text Produced by or under license from SEGA Enterprises LTD Trademark SEGA. The final (outer) section of the disc contains the game data itself in a higher density format. This section is 112 minutes long - just under 1 gigabyte. A normal CD-reader will not read beyond the first track because, according to the CD table of contents (TOC), there is no data there. 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 disc's data density. This method allowed Sega to use cheaper off-the-shelf components when building the Dreamcast. Place a Bid!