It's wilder than that: it hacks up the CGA text mode so instead of drawing all 8 scanlines of each character, it draws the first scanline twice then moves to th

It's wilder than that: it hacks up the CGA text mode so instead of drawing all 8 scanlines of each character, it draws the first scanline twice then moves to the next character. Then, it carefully chooses characters, foreground and background colours that (when combined) generate an NTSC composite signal with the required colours in it: https://int10h.org/blog/2015/04/cga-in-1024-colors-new-mode-illustrated/ https://int10h.org/blog/2015/04/cga-in-1024-colors-new-mode-...