HeatOS

Remember that HeatOS is fully made by Artificial Intelligence.

HeatOS is an ultra-minimalist 32-bit x86 protected-mode operating system written entirely from scratch in C and Assembly. It focuses on clean, comprehensible kernel primitives without any bloat or unnecessary dependencies.

Architecture & Features

The project is structured to implement core OS subsystems functionally and sequentially:

• Bootloader & Initialization: Custom 16-bit real-mode to 32-bit protected-mode boot sequence.
• Hardware Interrupts: Custom IDT, GDT, and ISR architectures to handle CPU exceptions gracefully and control hardware interactions (VGA, Keyboard).
• Memory Management:
  • Physical Memory Management (PMM) using bitmap block tracking mapping available RAM.
  • Virtual Memory / Paging (VMM - planned).
  • Basic kernel heap allocator (kmalloc / kfree).
• Process Scheduler: Foundational Ring-0 preemptive round-robin process scheduler setup.
• Storage: ATA Block driver stubs and FAT32 file system parser framework.
• Networking Core: Bare-metal clean-room TCP/IP Stack (Ethernet, ARP, IPv4, ICMP, UDP, TCP).
• Security & Web: Scaffolding for abstract Web Application interfaces (DNS, HTTP Client, mbedTLS dummy wrappers).

Building

HeatOS requires nasm (for assembly) and LLVM/clang for compiling the C components. It relies strictly on LLVM's ld.lld and llvm-objcopy for linking and binary conversion.

To build the kernel and generate the OS image on Windows:

build.cmd

This script will output Heatos.img (a bootable floppy image) and optionally Heatos.iso in the build/ directory without requiring Linux cross-compilers.

Running

You can easily run the compiled OS using QEMU:

run.cmd

Contributing

To add features or improve subsystems, explore the src/kernel and src/drivers directories where everything is strictly compartmentalized.