The patent for the 6800 chip reveals some interesting features. Most curious is the slush maker shown in the drawing on the first page: https://patentimages.sto

The patent for the 6800 chip reveals some interesting features. Most curious is the slush maker shown in the drawing on the first page: https://patentimages.storage.googleapis.com/be/e4/fa/8e78e829202f35/US3987418.pdf https://patentimages.storage.googleapis.com/be/e4/fa/8e78e82... (The patent office messed up and swapped drawings; there's a slush maker patent with a diagram showing instruction decoder, registers, and so forth.)