I agree with Kenny 100% and partly with Emusan. A rom can be produced without a SDK taking elements from the same base and tweaking drivers or combining roms from different manufacturers. Hence my suggestion to look at other Marvell devices, funny enough our unit is the same base as bluepanther rom so a diff could highlight what is specific to edge.
Regarding PTsenter "Rom" the only progress I can see is that manage to upgrade, I tried modifing the apps in the system.zip but the device refused to do anything so he knows something I do not. I would be nice to have a team here. The real rom cookers are cooking for fancy devices not for old ones with funny cpus.
contacted bluepanther dev and no answer