A computer is, at its core, just a bunch of transistors wired together. Once you have enough transistors on a board, though, one of the first layers of abstraction that arises is the Arithmetic ...

It is based on the Motorola MC14500 1-bit industrial controller, but since [David] changed the basic logic unit into an arithmetic-logic unit, he’s dubbing it the UE14500.

An arithmetic unit which also performs bitwise logical operations is commonly referred to as an ALU (Arithmetic and Logic Unit). The S1-AU Mk1 is a beautifully crafted DIY hardware kit designed ...