A custom Operating System written entirely from scratch in C++ and x86 Assembly, built for learning and experimentation in low-level systems programming.
The project is fully functional up to a graphical desktop environment and has been thoroughly tested in virtualized environments.

🧩 Inspired by:

• Write Your Own Operating System (YouTube)
• OSDev Wiki

• Minimal bootable OS with bootloader and kernel skeleton
• Text output (“Hello OS”) in VGA text mode
• Transition from real mode to protected mode
• Global Descriptor Table (GDT) for memory segmentation
• Interrupt Descriptor Table (IDT) with CPU exception handling
• Hardware interrupts and ISR management
• Port I/O operations for hardware communication
• Keyboard driver (interrupt-based, scan code → ASCII translation)
• Mouse driver (PS/2 interface, cursor and button handling)
• Driver abstraction layer for modular input handling
• PCI bus enumeration and device detection
• Base Address Register (BAR) mapping for device memory regions
• VGA graphics mode (320x200) with low-level pixel and shape rendering
• GUI framework with windows, cursor, and event handling
• Desktop environment supporting multiple draggable windows and text
• Bootable disk image compatible with QEMU, VirtualBox, and VMware
• task scheduler with simple context switching between processes
• dynamic memory management and kernel heap allocator (malloc/free)

• Languages: C++, x86 Assembly
• Tools: NASM, GCC cross-compiler, QEMU, VirtualBox, VMware, Makefile

• Verified under QEMU
• Confirmed stable input/output, interrupt handling, and graphics rendering

The project demonstrates the journey from bare-metal boot code to a simple desktop OS.

• Develop basic networking stack (Ethernet driver, frame transmission)
• Implement ATA driver for hard drive read/write access
• Add system call interface and start POSIX API alignment (read, write, etc.)

• Build full network stack: Ethernet → ARP → IPv4 → ICMP → UDP → TCP
• Implement minimal HTTP server running natively on the OS

• Parse partition tables (MBR)
• Implement FAT32 filesystem driver for file listing, reading, and writing