BrakidOS

Operating system experiment

Requirements:

• nasm
• cross-compiler: https://github.com/nativeos/homebrew-i386-elf-toolchain
• qemu emulator: https://www.qemu.org

Currently implemented:

• printing to screen
• dynamic memory management (first fit strategy)
• interupt handling
  • timer (used for preemtive taskscheduling and getting system time)
  • keyboard (supports US keyboard + shift)
• reading user input (blocking timer interupts)
• preemptive taskscheduling (round robin strategy)
  • yielding remaining processign time
  • idle process (picked if no other task is ready)
• garbage collector to free memory after processes have finished
• utility methods: number -> string, string -> number
• task manager to start new processes (select a program -> create a running process)

TODOs:

• file system

The kernel will be built into a floppy disk like format. It comes with its own rudimentary bootloader that initializes the GDT, enables the A20 gate and loads the rest of the kernel from floppy disk.