PekerOS

PekerOS is a custom-built, 32-bit x86 microkernel-based operating system developed from scratch. It features a modern graphical interface, a robust multitasking engine, and a high-performance graphics driver architecture.

Recent Milestones: The Graphics Evolution

In Phase 4, PekerOS successfully transitioned from legacy VGA Text Mode to a modern VESA VBE (VESA BIOS Extensions) graphical environment.

Key Technical Features:

• VBE Graphics Engine: Supports 800x600 resolution with 32-bit color depth. Integrated Bochs Graphics Adapter (BGA) support via PCI discovery for hardware-accelerated framebuffer access.
• High-Performance Sprite Engine: Implements a "Sprite Saving" (Pixel Recovery) technique. Instead of redrawing the full screen, the system only backups and restores the 8x8 pixel region under the cursor, reducing CPU load by 99.9%.
• Advanced PS/2 Mouse Driver: Interrupt-driven (IRQ12) with 3-byte packet synchronization. Features custom sign-bit logic and boundary enforcement for smooth, jitter-free cursor movement.
• Multitasking Rendering Pipeline: Leveraging the kernel's scheduler, graphics rendering is handled by a dedicated asynchronous task (Graphics Task), ensuring that UI updates do not block the system shell.
• Bitmap Font Engine: Custom 8x16 bitmap font renderer for high-readability text output in graphical modes.

Core Architecture

• Bootloader: Multiboot compliant (tested with GRUB and QEMU).
• Memory Management: Integrated Paging and Physical Memory Manager (PMM).
• File System: PAFS (Peker Advanced File System).
• Interrupt Handling: Global Descriptor Table (GDT), Interrupt Descriptor Table (IDT), and Master/Slave PIC remapping (IRQ 0-15).
• Shell: fash (Ferkan Advanced Shell) featuring system commands and multitasking control.

Build and Run

To compile the kernel and drivers:

bash scripts/compile.sh

To launch the OS in QEMU:

bash scripts/run.sh

Developer

Muhammed Yasir PEKER

---

PekerOS: A passion for low-level engineering and operating system design. 🚀