Ken Shirriff on Nostr: The Arithmetic/Logic Unit (ALU) is the heart of a computer, performing arithmetic. ...

The Arithmetic/Logic Unit (ALU) is the heart of a computer, performing arithmetic. The ALU is a tiny part of a modern processor, but it occupied three circuit boards in the Spacelab computer. The larger chips are '181 ALU chips, each adding four bits; 8 chips let you add 32 bits.