itoledo, one of the devvers working on the new Dreamcast emulator “dcemu” has posted this news over at DCEmu UK:

dcemu now can load sectors from a CD (you can burn stuff files required by your emulated software to a CD and dcemu will read from it). this worked well for this version of doom (burned doom1.wad to a CDRW and the emu loaded it fine), i’ll try with other software later. i’m not making a release yet because there is still some intc-related stuff to fix, but if you are bored try to compile it from CVS. now libcdio is required to compile! i’ll put the libcdio binaries for win32 in my page at http://alumnos.utem.cl/dcemu later.

More info can be found at the DCEmu UK forums, in this topic.