Board Thread:Program Announcements/@comment-9531161-20131026052450/@comment-9531161-20140520043415

Well, I sort of stared really menacingly at my DSi until it flipped out and flipped the letters.

But first, I used CHRREAD to read each letter into an array, then I swapped the pixels in the array to flip the image, then used CHRSET to overwrite the letter with the upside down letter.