By the way HP calculators (like 48S was based on a 4bit access-RAM. They was 32bit CPU but first model used 4bit buses. Also GameBoy first CPU was 4bit based i

By the way HP calculators (like 48S was based on a 4bit access-RAM. They was 32bit CPU but first model used 4bit buses. Also GameBoy first CPU was 4bit based if I recall correctly So 4bit CPU has something to say. https://gioorgi.com/2020/hp-42s/ https://gioorgi.com/2020/hp-42s/