sanyam.
Terminal · File editor · StatsappsWindow managerz-order · hit-testCompositordirty-rect ~47×SimpleFS + LRU block cache~2,400× cached readPS/2 · ATA PIO · serialIRQ → ring buffersPreemptive scheduler~269 cycles / switchFrame allocator + paging~1.34M ops / sGDT · IDT · TSSexceptionsBIOS bootloaderx86_64 · no_stdRust
Terminal, file editor, statsappsWindow manager, compositorz-order, hit-testing, dirty rectanglesScheduler, memory, SimpleFS269 cycles per switch, 2,400x cached readsx86_64 from the BIOS, in Rustno libc, no std
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BEDROCK

A Bare-Metal OS Kernel in Rust

Most 'OS' projects are Linux distros or userspace simulations. BEDROCK is the real thing: a kernel that talks to the hardware directly, with nothing between it and the CPU. It boots on QEMU (and bare metal) into a working GUI desktop you can click around.

Result
~269 cycles / context switch
~1.34M allocator ops/sec
~2,400x cached read speedup
What it does

A no_std x86_64 operating system written from scratch in Rust: no Linux underneath, no libc, just a bootloader and hardware. Boots to a graphical desktop with a window manager, a preemptive scheduler, and its own filesystem.

What I built
  • Hand-written kernel from the ground up: custom GDT/IDT/TSS, a two-stage frame allocator and virtual memory manager, and a preemptive round-robin scheduler with hand-rolled context switching at ~269 cycles per switch.
  • Framebuffer graphics stack with dirty-rect compositing (~47x faster than naive full redraws) driving a z-ordered window manager, PS/2 keyboard and mouse, and a SimpleFS filesystem with LRU block caching (~2,400x read speedup).
How it works
  1. 01BIOS Bootloader
  2. 02Kernel Core (GDT/IDT/TSS + exceptions)
  3. 03Frame Allocator + Virtual Memory Manager
  4. 04Preemptive Scheduler (context switch)
  5. 05Framebuffer Compositor (dirty-rect)
  6. 06Window Manager (z-order + hit-test)
  7. 07PS/2 Drivers + ATA PIO Disk
  8. 08SimpleFS (LRU block cache)
  9. 09Terminal / File Editor / Stats apps
Features
  • no_std, no libc, no host OS: a genuine bare-metal x86_64 kernel booted straight from a BIOS bootloader
  • Two-stage physical frame allocator plus a virtual memory manager, benchmarked at ~1.34M allocations/sec
  • Preemptive round-robin scheduler with hand-written context switching (~269 cycles per switch)
  • Framebuffer compositor with dirty-rect redraws (~47x faster) feeding a window manager with z-order and hit-testing
  • PS/2 keyboard and mouse via IRQ handlers, plus an ATA PIO driver for real disk access
  • SimpleFS filesystem with LRU block caching (~2,400x read speedup), persistent across independent boots
  • Ships with real apps: a terminal (ls, cat, write, rm, mv, df), a combined file browser + text editor, and a live performance-stats window
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