Wrote a small text engine with printf support for tiled modes in the GBA. This allows me to easily write dynamic things on the screen for debugging (or other purposes).
No scrolling support, although I don't think I need it for now. It could be implemented on top of this though.
Roughly following the TONC tutorial, but drifting off quite a bit to experiment with the concepts I learn there.
The code is on my page if you want to take a peek.