[Damian Peckett] has implemented an Apple ][, its 6502 processor, and a cassette port, all on an Arduino Uno. If that wasn’t enough, he also uses a PS/2 keyboard for input and outputs analog VGA.

Using these features of the language you no longer have to worry about specifying ... These are aliases of the underlying types, so on Arduino Uno, int8_t is the same type as a char, and uint16 ...