I've released a first alpha of the compiler. It's good enough to build and run Fuzix although some of the code generation and peepholes could be improved a lot. The 6803/6303 target seems to be working well both for Fuzix and it can also make tape files for the Tandy MC-10 so you can write (small) games in C for it.

On the 6800 side 8/16bit integer stuff seems to be fine bu there are a lot of lurking support code bugs to nail that currently mean it blows up trying to do anything much with long types.