That's right. The large font can also be done and it's been documented in here already. That one involves some different steps in both editing and then getting it into the correct format.

Has anyone started a converter for it yet? The first step would probably be to define how a source bitmap should be structured for conversion (to make both editing and then conversion easy).

A large font can be quite a bit of work. But at the same time, there's a lot more freedom because of its size - you can also lay down the base graphics by using a real font.

Bruno