A YouTuber known as MINT spent three months hand‑soldering old memory chips and 8‑bit logic components to create EPROMINT, a complete CPU with its own ALU, memory controller, I/O, interrupt system and a VFD display capable of playing low‑resolution video, and released all designs as open‑source on GitHub.
From a rapid BBC Micro prototype in the early 1980s to the 1985 launch of the Acorn RISC Machine, ARM evolved into a low‑power, licensed CPU core that powered devices from the Newton to today’s iPhone, ultimately becoming the world’s most ubiquitous processor architecture.
Sam Zeloof, a teenage electronics hobbyist, spent three years hand‑crafting a 1200‑transistor CPU (the Z2) in his garage using homemade equipment and a 10 µm polysilicon gate process, demonstrating that complex chip design can be pursued outside of a clean‑room environment.
Alibaba Cloud scientist Jiang Xiaowei, a pioneer in CPU architecture, chip design, networking, and virtualization, was recently inducted into the HPCA Hall of Fame, marking the first cloud‑computing scholar honored, and highlighting his contributions to the EFLOPS AI server cluster that dramatically speeds up large‑scale model training.
This article provides a comprehensive overview of operating system fundamentals, covering hardware components, kernel and user modes, CPU architecture, memory hierarchy, caching strategies, I/O devices, bus systems, boot processes, and various types of operating systems from mainframes to embedded devices.
