Microcode in Intel's 8087 floating-point chip: the scale instruction

Intel 8087 Math Coprocessor Chip — If this deep dive into the 8087's microcode and its scale instruction has you itching to hold the real thing, vintage 8087 coprocessors are still available from chip sellers. It's a great display piece or a functional upgrade for a retro PC build, letting you run period floating-point code on the very silicon the article dissects.