[solved] Text Backgrounds

[spectre1989]

OK so firstly I stopped trying to convert the 4bpp bitmap to 8bpp, and just went with it. Secondly, got it going by using dmacopy to copy the tiles and map into memory. Lastly I read the bitmap in back to front, and now the letters are the right way up but are flipped horizontally. Is there any performance decrease to horizontally flipping the tiles using map bit 10? Unflipping the image is proving fiddly.

EDIT: Got it in the end, just had to work out how to separate each u8 into 2 nibbles so I could rearrange each row properly. Got my own printf function working, I think I can call this one solved. Cheers for all the help guys.