devkitPro

That seems to work fine

Thanks

In a program that I am creating, one screen of tiles is replaced with another screen of tiles

To use this I use:
dmaCopy(mapx, bgGetMapPtr(bg), sizeof(mapx));

to copy the tile map (mapx) to the background.

When simulated using DeSmuMe, this works fine, but when I try it on an actual nintendo ds ...