BEDROCK

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.

• 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

• 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).