Mame, disks and program formats

[ChickenMan]

In the ROMs folder I assume you have these 3 roms as a minimum,

charrom.bin
rom1.bin
bn56.rom

and when you use ubee512 you need to use it like ubee512 -a filename.dsk and it will boot filename.dsk as if its running on a 512k Premium Microbee.