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

This blog post examines the microcode behind the FSCALE instruction of Intel's 8087 floating-point chip, detailing its complexities and the historical context of floating-point arithmetic. Written by Ken Shirriff, it describes the intricacies of the 8087 micro-instructions, challenges of reverse engineering, and the significance of the 8087 in standardizing floating-point operations.