Originally Posted by ReadOnlyCat
Or you could adapt CodeTapper's MapTapper to search the ROMs for sprites visually.
I doubt Richard Aplin took the pain to look at the entire disassembly in order to find the sprites, he must have used a simpler and faster solution given the little time he had. Maybe we should ask him, if he still remembers.
Richard extracted the sprites from the physical Arcade Roms no easy task.