Simple 32-bit x86 Kernel

This project is a minimal operating system kernel for 32-bit x86 architecture. It demonstrates:

• Custom interrupt descriptor table (IDT) setup
• Keyboard interrupt handling via IRQ1
• Basic screen output using VGA text buffer
• Support for Enter and Backspace keys
• GRUB Multiboot compliance
• Bootable ISO generation

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Requirements

Make sure you have the following tools installed:

sudo apt install gcc nasm xorriso grub-pc-bin qemu-system-x86
sudo pacman install gcc nasm grub qemu-system-x86

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Build & Run

Build ISO

./build.sh

This generates:

• kernel.bin – the compiled kernel
• kernel.iso – bootable ISO

Run in QEMU

qemu-system-i386 -cdrom kernel.iso

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Keyboard Features

• Characters appear on screen as typed
• Enter key moves to the next line
• Backspace deletes the last character
• VGA color: light gray text on black background

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Bootloader

This kernel uses GRUB Multiboot for loading:

• grub.cfg sets up the GRUB menu
• kernel.bin is Multiboot-compliant and loaded at 0x100000

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