nanokrnl: a Windows kernel, from scratch, in your browser

The end of an era.

An NT-compatible kernel written in Rust, booted by nanox (a ~60 KB x86-64 emulator) and running real, unmodified Windows binaries (cmd.exe, more.com, null.sys) on its own syscalls. Hit Boot and wait for the C:\> prompt.

By Matt Suiche (@msuiche), Fable 5, Opus 4.8. Shout out to Fabrice Bellard.

C:\ Command Prompt (nanokrnl) 

    

      
      
      
    

    

      idle
      …
    

  


  






  

    
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WINAMP PLAYLIST

  







  
Resource Monitor×

  

    
CPU (emulation throughput)

    
    
speed0 MIPS

    
Memory

    
    
nanox RAM0 MB

    
JS heapn/a

  










  
readme.txt×

  
Type directly into the console once you see C:\>. Try ver, echo hi, or exit.
     Enter sends the line. The kernel runs its self-tests first, so the prompt takes a few seconds.