Is this fantasy?

Casio used a similar method to pack 5x7 bitmap characters into ten hex digits on the FX-850P. For each column (there are 5), bit 0 is ignored, bit 1 is the bottommost pixel and bit 7 is the topmost one, take a 2-digit hex of that and concat the whole thing, you've got 10 hex digits you can pass to DEFCHR$ to define *your **own** characters*! Wow!

@RememberMe Multics ftw