GenesisOS

Small project I made because I wanted to learn about kernels and how they work.

This operating system have the following features:

• Kernel allocator
• Virtual Memory
• Interrupts / IRQs
• Disk: ATA PIO
• Syscalls
• Scheduler (Round-Robin algorithm)
• Serial/UART driver
• Filesystem: Support FAT32
• ELF Loader
• Userland shell/init binary
• Devices/File descriptors
• VGA Driver
• BMP Renderer

All this work, just to load a userland ELF binary that echoes back whatever you write to it by calling SYS_read and SYS_write:

More info:

• Build Instructions
• IDE Configuration

References

To write this project, I used:

• Intel SDM Vol 3(325384-sdm-vol-3abcd.pdf)
• OSDev Discord community(link)
• OSDev: https://wiki.osdev.org/
• "The little book about OS development": https://littleosbook.github.io/
• SerenityOS and Academic projects such as JOS and xv6 (to get inspiration for design ideas)
• nanobyte-dev YT channel to get introduction on FAT filesystems.