Online OR1K Emulator running Linux
JavaScript C HTML
Switch branches/tags
Nothing to show



jor1k is a OpenRISC 1000 emulator written in JavaScript running Linux. It runs in almost any modern web browser. Have a try and see if it runs in your browser by opening the demo. More information can be found on the Wiki pages.


  • Main demo page
  • Edit, compile and run C code in your browser
  • Symmetric multiprocessing with 2 cores, 4 cores, 8 cores, 16 cores (unstable with inreasing cores)
  • Simple demo
  • RTEMS (real time operating system) demo
  • Simple demo of the RISC-V CPU implementation. Wait until the first message appear in the terminal, then choose bbl in the dropdown menu.

Project Links

  • Bugtracker to report any issues or feature requests
  • Wiki containing more detailed descriptions


  • The program is distributed under the terms of the Simplified BSD License. The license details can be found in the file ""
  • The ACE editor is BSD licensed.


Sebastian Macke


Gerard Braad
Ben Burns
Lawrence Angrave
Neelabh Gupta