Demfir is a DivIDE firmware. DTP's Emulator Files Runner, that is. That means it's able to run TAPs, Z80s, SNAs, even not complex TZXs. Besides this, it can handle POK files and has far better file browser with search feature than FatWare. It works with ISO images instead of direct MSDOS FAT access. And this won't change. Demfir was never supposed to work in this way, btw. But
this new beta release is a bit revolutionary. Why? It can save to TAPs. Well, again:
It CAN SAVE to TAPs! The saving is done by overwriting of existing TAP file (it can't be done in different way). An 128Kb
empty.tap file is included for your tests. I've tried to save Basic stuff and even music from SQ-Tracker. It works. It's in a very beta state now, there's a lot to do, but finally there is a firmware which supports saving and works on unexpanded DivIDE. Hooray.