Dev builds bare-metal UEFI bootloader and Ring 0 kernel in ongoing OS series

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A developer working on a custom bare-metal operating system called V.E.L.O.C.I.T.Y.-OS published Part 8 of a 12-part series on June 27, detailing the transition from UEFI boot services to direct CPU Ring 0 control. The project aims to build a Single-Address-Space Operating System running entirely within the CPU's L3 cache, bypassing conventional OS layers for microsecond-level execution. To safely exit UEFI, the developer implemented three core modules: a pre-allocated 16MB heap allocator, a Global Descriptor Table with flat 64-bit kernel segments, and an Interrupt Descriptor Table for exception handling. A Task State Segment with an Interrupt Stack Table was also configured to handle double-fault exceptions without triggering CPU resets. The series is written in Rust using no-std conventions, with upcoming parts covering bare-metal drivers, a spatial GUI renderer, multi-agent scheduling, and eventual self-optimization via a local language model.

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