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Virtix - Design is Law

Virtix is an operating system with one goal in mind: simplicity. There are plenty of sacrifices, but ultimately, I think that a tiny kernel is incredibly beneficial to the programmer. With something like Linux, I don't even think Torvalds is able to fully comprehend the codebase anymore. Virtix should be able to fit within a programmers mind completely. (I don't want to bash Linux)

Design

  • Virtix is a monolithic kernel
  • The scheduler is a simple cooperative multitasker
  • The main file system is a special metafs on top of FAT16, for cross-platform compatibility
  • Multiboot compliant

Layout

  • Kernel code is in virtix/src/
  • Libc code is in virtix/libc/
  • Userland files are in virtix/userland
  • Userland binary sources are in virtix/userland/src
  • Documentation will eventually be in virtix/doc

Progress

  • Paging
  • Multitasking
  • A very simple ELF parser
  • File streams
  • ATA support
  • A small libc
  • devfs

TODO

  • Heap implementation needs a lot of work
  • ELF loader could definitely be improved

Building Requirements

  • nasm
  • GNU coreutils
  • i686-elf-gcc
  • GNU make
  • bash or zsh
  • grub2 if you want to make bootable ISO images
  • Optionally, qemu or bochs for testing

To build simply navigate to virtix/ and type make. If you have qemu, and you want to test, type make run to build and load into the VM.

Special Thanks To

  • James Molloy - His guide set up the basis of this kernel
  • Github User Levex - His osdev repo had a lot of great examples inside
  • Brokenthorn OS development series - Taught me OS dev basics/advanced x86 assembly
  • Ralph Brown - His interrupt list is indispencable
  • And of course, The OSDev Wiki - This is a spectacular resource
  • #osdev on Freenode is a lifesaver