Dreamcast VGA Adapter
From Sega Retro
The Dreamcast VGA Adapter is a peripheral for the Sega Dreamcast which allows the system to connect to a computer monitor. The result is typically sharper, higher resolution graphics than that through the standard component output, and alllows the console to compete with its competitors, the PlayStation 2, Xbox and Nintendo GameCube.
Sega's model of the VGA adapter is black, and is significantly more expensive than third-party alternatives ($50 USD vs. $20 USD). Some third party adapters were known to have design problems meaning not all VGA connectors will fit. Visual quality is also often worse than the official model.
Not all Dreamcast games are compatible with the VGA Adapter, namely SNK ports such as Garou: Mark of the Wolves. The majority of games can be forced to use the VGA adapter by using software such as the DC-X.
VGA adapters are a parallel alternative connector to display high end resolutions. Component video connectors found on sixth generation consoles can use 480p. For instance, PlayStation 2 works in component but the signal is worst because like its predecessor it displays its anti-aliasing problems unless on RGB or 720p compatible games. The GameCube and Xbox do not have this problem. The VGA adapter also permits a 480p function on a specialized HD-TV compatible monitor with a VGA connector, or with a 100 dollar plus video converter. The video converter splits the signals sent from VGA to YPbPr colors. Like with personal computers, these VGA connectors are usually only compatible with monitors and projectors.