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by Benjamin Landers

RISC-V Assembler and Runtime Simulator

RARS, the RISC-V Assembler, Simulator, and Runtime, will assemble and simulate the execution of RISC-V assembly language programs. Its primary goal is to be an effective development environment for people getting started with RISC-V.


  • RISC-V IMFDN Base (riscv32 and riscv64)
  • Several system calls that match behaviour from MARS or SPIKE.
  • Support for debugging using breakpoints and/or ebreak
  • Side by side comparison from psuedo-instruction to machine code with intermediate steps
  • Multifile assembly using either files open or a directory

Environment Variables:

  • RARS_JAVA (Default: none): Passes arguments directly to the Java command (Will override other environment variables)
  • RARS_SCALE (Default: Screen width / 1920): Sets the sun.java2d.uiScale property (See documentation at https://news.kynosarges.org/2019/03/24/swing-high-dpi-properties/)

Changes in version v1.6

over 1 year ago
(Built about 1 year ago)
  • No changelog provided
  • Community built

    This app is developed in the open by an international community, and released under the MIT License.
    Get involved
Installed Size~176.56 MiB
Download Size60.51 MiB
Available Architecturesx86_64, aarch64