These fonts are ported to be used from the FX cart. The example sketch in ./FontDemoFX demonstrates how they can be used.
Note the bitmap images are named with a different width than the font name because the images include padding.
Fonts can be inlcude as:
image_t tinyFont = "tinyfont_5x4.png"
image_t f4x6 = "Font_5x6.png"
image_t f3x5 = "Font_4x5.png"
image_t arduboyFont = "arduboyFont_6x8.png"