To reset your Dreamcast's internal RAM, insert the Web Browser GD into your Dreamcast. Now plug a single controller into slot B amd hold buttons B and X while turning on the system. Continue to hold them until the Web Browser's login screen appears.
Press all four pad buttons and then hit start to reset your game.
Press B + Y + X + A + Start during most games to reset the system. Change settings Press Sleep to turn on the VMU. Press Mode until the clock icon flashes, then press A. Hold Left + A at the time display screen to start the process of entering a new date and time. Note: The time is entered in 24 hour military format. Press Up or Down to change the animated display when prompted.