Twig is a 32-bit protected mode, single-tasking operating system built for educational purposes. It is written in C and x86 Assembly and provides a minimal environment to understand low-level systems programming.

• VGA text-mode interface
• Basic shell with built-in commands:
  • about, clear, reboot, echo, ls, cat, touch, write, rm, help, meminfo

• Multiboot-compliant bootloader
• GDT and IDT setup
• IRQ remapping and keyboard driver (Scancode Set 0)

• Custom hybrid bump + freelist allocator
• alloc() and free() api
• Defined heap using linker symbols

• In-memory file storage
• 32 files, each up to 4KB
• Shell support for viewing, creating, and modifying files

• Custom string and ring buffer implementations
• Minimal kernel runtime (no C stdlib)

• multitasking? Framebuffer graphics? we'll see i guess.

• Cross-compiler: i686-elf-gcc
• QEMU: qemu-system-i386
• Netwide Assembler (nasm)

make clean
make build
make run