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Cyjon

A simple, clean code, multi-tasking kernel written in pure Assembly language for 64-bit processors from the AMD64 family.

Install / Use

/learn @CorruptedByCPU/Cyjon

README

Info

Cyjon is fully compatible with Fern-Night. Any modification to either repository will be reflected in the other.

Every comment, label is now in English.

Old version of Cyjon is still available at old 0.1440 branch and eldest 0.674 branch.

Cyjon v0.2165 (workname)

A simple, clean, multi-tasking operating system written in pure assembly (kernel) language for 64-bit processors from the AMD64 family.

Cyjon 0.2128

Hey!

So... the code is optimized for readability, not speed.

Software (if you want to build and run your own ISO):

  • qemu-system-x86_64
  • nasm
  • ld.lld
  • xorriso

Compilation/Exec (GNU/Linux):

user@hostname ~ $ make
user@hostname ~ $ ./qemu

Related Skills

View on GitHub
GitHub Stars455
CategoryDevelopment
Updated3d ago
Forks29

Languages

Assembly

Security Score

85/100

Audited on Mar 23, 2026

No findings