🚀 FzKernel

FzKernel is a minimal 32-bit operating system kernel written in C and Assembly for the x86 architecture. This is an updated version of the project, featuring an interactive shell (fzsh), keyboard input, real-time clock (RTC) support, a basic text editor, and interrupt handling.

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🌟 Features

• Interactive Shell (fzsh): Supports commands like help, clear, about, halt, edit, links, rtc.
• VGA Text Mode: Text output with color support and screen scrolling.
• Keyboard Handling: Supports shift, caps lock, and basic input via IRQ1.
• Real-Time Clock (RTC): Displays current time and date.
• Programmable Interval Timer (PIT): Implements sleep function for delays.
• Interrupt Management: Configures IDT and PIC for IRQ0 (timer) and IRQ1 (keyboard).
• Basic Text Editor: Simple editor for text input (via edit command).
• Open Source: Source code available on GitHub.

⚠️ This is an evolving project! Expect new features like an improved editor, file system support, and additional shell commands.

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⚙️ Requirements

To build and run FzKernel, ensure the following tools are installed:

• 🛠️ gcc (C compiler, version 4.8 or higher)
• 🛠️ ld (GNU linker)
• 🛠️ nasm (Netwide Assembler)
• 🛠️ qemu-system-x86_64 (emulator for running the kernel)

Verify your setup:

gcc --version
ld --version
nasm -v
qemu-system-x86_64 --version

🛠️ Build & Run

1. Clone repo

git clone https://github.com/flartiks/FzKernel.git
cd FzKernel

2. Build kernel

make

3. Run kernel

make runkernel

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📜 Usage

After booting the kernel, you will enter the fzsh shell. Available commands:

• help — Display the list of commands.
• clear — Clear the screen.
• about — Show information about FzKernel.
• halt — Halt the system.
• edit — Launch the text editor.
• links — Display the GitHub repository link.
• rtc — Show the current time and date.

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🔧 Technical Details

• Architecture: x86 (32-bit protected mode).
• Bootloader: Multiboot-compatible (GRUB).
• Components:
  • Graphics: VGA text mode (80x25, 16 colors).
  • Interrupts: PIC and IDT setup for IRQ0 (PIT) and IRQ1 (keyboard).
  • Timer: PIT configured at 100 Hz.
  • I/O: Direct port access (0x60, 0x70, 0x71, etc.).
• Build: Uses gcc with -m32, nasm with -f elf32, and ld with a custom linker.ld script.

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📌 Future Plans

• Add functionality for "edit".
• Implement file system support.
• Add commands for displaying system information (memory, CPU state).
• Explore transition to x86_64 (64-bit mode).

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📜 License

FzKernel is distributed under the Apache License 2.0. See the LICENSE file for details.