zbOS

zbOS is a UNIX-clone being built from scratch.

What's been done:

• A custom bootloader capable of switching to protected mode and bootstrapping a kernel
• a standard C library (libc) WIP
• Interrupt handler
• Device drivers
  • video (hardware cursor, scrolling, ASCII escapes)
  • clock (PIT timer)
  • keyboard
  • filesystem (SFS? ramdisk?)
• Memory management
  • paging WIP
  • heap
• Process scheduling (multitasking)
• the future (userland?)

Getting started

apt install build-essential nasm qemu       # on debian
dnf install @development-tools nasm qemu    # on fedora

make run                                    # build and run in qemu
make debug                                  # run with bochs debugger

Resources:

• OSDev.org 👈 this is all you need
• Nick Blundell's OpSys Lecture Notes
• www.brokenthorn.com/Resources/OSDevIndex.html
• pages.cs.wisc.edu/~remzi/OSTEP
• Bran's Kernel Development Tutorial
• JamesM's kernel development tutorial
• linux-insides
• Samy Pesse's How to make an OS