I made a minimalist Operating System in 3 days

I recently made an operating system, from scratch(not Linux), for x86 64 bit machines, in C and some assembly.Current feature list includes: Features in rough chronological order of implementation

• VGA for outputting text to the screen
• Interrupt Descriptor Table for handling interrupts(keypresses, hardware interrupts)
• Interactive kernel-level shell for debugging and functionality
• Programmable Interval Timer with interrupt handling
• Custom memory allocator, with a simple free list implementation
• In-memory filesystem with simple utilities(create, list, copy, delete, etc.)

You can look at it on Github here!