In this web content, the author explores a 1982 Ethernet chip and identifies a unique feature: a second layer of yellow wiring on the chip’s die. This layer is made of resistive polysilicon and is used in the chip’s static storage cells and latches. The author examines the purpose of this layer and explains that it provides resistance for storing and manipulating bits. The content also discusses different techniques for storing data in the chip’s inverters and highlights the advantages and disadvantages of each method. Overall, the author provides detailed insights into the inner workings of the Ethernet chip and its construction.
https://www.righto.com/2023/12/amd-lance-ethernet-double-poly.html