this version detect at startup if "host:romlist.txt" exist :
 f exist then load in HOST mode , so roms are load from host:
 (according to the romlist.txt) and savestate a save/load from host:
 the erase fct is disable in HOST mode .

 Else if not then prg start in CD/Mc mode ,

 in this mode , load are made from memorycard/cdrom  with autoscan for roms
 (no files txt needed) so just put roms in a fodler(or more , 120 roms/dir) 
 on the root of device (mc0: or cdrom and savestate are made in mc0:PSMS/
 so in this mode You need to have a memorycard plug in port 0 !