c-os

The Chad Operating System. Demo

Inspiration

I've been meaning to read the mini-book The little book about OS development for a while. I finally got around to it and it made OS development seem simple enough for even me to tackle. The result is this toy OS.

Requirements (Updated)

Setting up the Watcom build environment is no easy task, especially on Mac. For this reason I've created a Watcom Docker build image

The only requirement for building in this way is

• Docker

Requirements (Old)

These requirements are targeted at Mac. For Windows or Linux the requirements are mostly the same but details will vary.

• X-Code (Mac only, this will bootstrap the building of the cross-compiled gcc)
• Watcom compiler and linker (see here)
• NASM (brew install nasm)
• mkisofs (brew install cdrtools)
• bochs (see here)
• qemu (if you want an alternative tool - brew install qemu)

Detailed instructions on environment setup are in the setup docs

Build (Old)

We use SCons for building because Make is the worst.

• Build boot and kernel scons
• Clean up scons -c

Build using Docker

Build the c-os image

$ docker build -t c-os-build -f Dockerfile.local.build .

Run the build image

$ docker run --rm -v `pwd`:/app c-os-build

Running

$ ~/opt/bochs/bin/bochs -f bochsrc.txt -q

Running using PCJS and Docker

Build the c-os server image

$ docker build -t c-os .

Run server

$ docker run --rm -p 8080:8080 c-os

TODO

1. Get ISO building working again
2. More SCons commands like building ISO or floppy
3. Fix SCons dependencies so I don't have clean all the time
4. Update PCjs to new repo and upgrade

Docs

• Development Log
• General Memory Map
• C-OS Memory Map
• Installing Bochs from Source
• Setting up the Watcom Toolchain on Mac
• Setup for C-OS Development
• Disk Geometries
• References