From Game Tech Wiki
- Processor: Hitachi SH-4 @ 200 MHz
- Graphics: NEC PowerVR2 @ 100 MHz
- Sound: ARM7 Yamaha AICA @ 45 MHZ
- Main RAM: 32MB
- Video RAM: 8MB
- Audio RAM: 2MB
- Storage: Sega-Yamaha GD-ROM 1024MB
- VMS Card: 128Kb 48x32 monochrome LCD display with 1 channel sound
- Input: 4 controller port
- Network: 33.6k / 56k modems Ethernet 10/100Mb
- Modem - Coming as a standard feature of the Dreamcast, the 33.6k or 56k modem allowed the Dreamcast to be the first online out-of-the-box game console.
- LAN adapter - The HIT-300 add-on, using the Fujitsu MB86967 chip, was a 10mbit ethernet adapter.
- Broadband adapter - The HIT-400 add-on was a step up from the HIT-300, using a Realtek 8139 chip, allowing for much greater speeds as a 10/100mbit ethernet adapter.
- Zip Drive - Achieving only prototype stage, the iOmega Zip Drive was intended to be a rewriteable storage medium for the Dreamcast, as an alternative to a hard disk drive that would become standard in game consoles to come.
- Standard controller - The regular Dreamcast controller has four face buttons (ABXY), a D-pad, an analog stick, and two analog shoulder triggers (L and R). There are two expansion slots for connecting various accessories and a window for a VMU screen.
- Fishing Rod - The fishing rod controller featured an analog stick and ABXY buttons and contained an accelerometer for the casting motion. It's even compatible with Soul Calibur and can be swung like a sword.
- Light Gun - The light gun controller is simmilar to the Nes Zapper and is generally used to play on-rails arcade-style shooters. Sega's officail light gun accessory was never relased in North America due to conterversy surrounding the, then recent, Columbine school shooting, although a number of third-party light guns were relased. All Dreamcast light guns use their primary trigger as the R button and pointing at the screen in place of the analog stick. Most have some combination of the D-pad and face on either the side or top of the gun for menu navigation.
- Arcade Stick - The arcade stick controller is a heavy duty replica of the six button controllers found on arcade cabnits The stick acts replaces the D-pad and the six buttons act as the face buttons and triggers would on a standard controller.
- Mouse and Keyboard - The mouse and keyboard were intended to be used with the Dreamcast's built in web browser to allow for a online experince similar to that of a desktop computer. The mouse and keyboard could also be used to play the few games that support them, such as 'Typing of the Dead' and 'Rez'.