UPDATE January 2020 -- DCEmulation is currently under a transition -- if you cannot find the information you're looking for on this wiki, please search here instead: https://dreamcast.wiki/
As usual, the DCEmulation forums , now the oldest active Dreamcast development community, are available for discussion and lots of useful Dreamcast information.
I'll post some updates here too while the transition is going:
Links to dcemulation.org (11)
sega-dc.deSEGA-DC.DE – News | Dreamcast. SEGA. Community. Mehr. Seit 2003.