The C64 Dead Test Font

The article documents the previously undocumented font used in the C64 "Dead Test" diagnostic cartridge, which implements 58 characters in a distinctive boxy style inspired by the MICR E-13B character recognition font. The special embedded font was necessary because the diagnostic cartridge needed to function without relying on the C64's built-in character ROM, and notably includes an unexplained C-shaped character and box-drawing symbols in place of standard punctuation marks.