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 ...

One of the more famous of these devices is the 74181, a cascadable 4-bit arithmetic logic unit, or ALU. An ALU is the heart of a microprocessor, performing its operations.

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 ...