Once you have enough transistors on a board, though, one of the first layers of abstraction that arises is the Arithmetic Logic Unit ... to build from a NAND gate all the way up to a functioning ...

Perhaps this CPU-less computer with a single NOR-gate instead of an arithmetic-logic unit is enough of a hacker flex? We certainly think so. We must admit that when we first saw [Dennis Kuschel ...

At a bare minimum, a CPU is an instruction decoder and an arithmetic logic unit (ALU); the decoder reads ... made more complex by the use of silicon gate transistors. At the time, aluminum gates ...