The Intel 8087 chip: floating-point addition and subtraction

The article delves into the specifics of the Intel 8087 chip's floating-point addition and subtraction operations, discussing how the chip uses microcode to optimize these operations. The author provides detailed explanations and diagrams of the microcode sequences for addition and subtraction, highlighting the use of flags and registers. The article also touches on the limitations and trade-offs of the chip's design, including the use of a stack-based architecture and the reliance on microcode for certain operations.