So, two things first m3u support for this core was removed in an update. Fortunately, I had a backup of an old version of the core that still has m3u support. There seems to be no reason for m3u support removal any chance it will come back.
Second even on the old core m3u can’t Handle a combination of both an hdi file and a fdi file at the same time. The reason I need this is for a game called Giten Megami Tensei - Tokyo Revelation. It has a strange setup where it runs off of both an hdi file and a fdi file at the same time. If one is missing it won’t work. The way it is now I have to load the hdi file then mount the fdi file from cores built in menu (opened with f12) then restart the core.
So would be possible to add back in m3u support and give it the capability to handle both hard drives and floppies at the same time.