Zonix OS

A minimal x86 operating system with process scheduling, memory management, interrupt-driven I/O, and FAT32 file system support.

Current Version: 0.7.1

Features

• Process Scheduling: Round-robin scheduler with sleep/wakeup mechanism
• Memory Management: Paging with swap support (FIFO algorithm)
• Interrupt-Driven I/O: IDE disk operations with hardware interrupts
• Multi-Device Support: Up to 4 IDE devices (Primary/Secondary Master/Slave)
• FAT32 File System: Read-only FAT32/FAT16/FAT12 support for disk files
• Interactive Shell: Built-in command-line interface

Environment

sudo apt install make gcc nasm bochs-x dosfstools, mtools

Build

make

Run

# Create FAT32 test image (first time only)
./tools/create_fat32_image.sh

# Run Zonix OS
bochs -f bochsrc.bxrc

Shell Commands

System Commands

• help - Show available commands
• uname - System information (-a for all)
• ps - List all processes
• clear - Clear the screen

Disk Commands

• lsblk - List block devices
• hdparm - Display disk information
• disktest - Test disk read/write operations
• intrtest - Test IDE interrupt functionality

File System Commands

• mount <device> - Mount FAT file system (e.g., mount hd1)
• umount - Unmount file system
• ls [/mnt] - List files in root directory
• cat <filename> [/mnt] - Display file contents
• info - Show file system information

Memory Commands

• pgdir - Print page directory
• swaptest - Run swap system tests