# TheThirdOne/rars

RARS -- RISC-V Assembler and Runtime Simulator

Repository: https://github.com/TheThirdOne/rars
Canonical: https://ross.abutalabs.com/products/rars
Language: Java
License: NOASSERTION
License Family: other
Topics: mars, risc-v, riscv, assembler, simulator, ide, education
Last push: 2024-07-19T16:46:44+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3387, "days_push": 775, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1618, forks 311 (observed 2026-08-28T04:05:12.081017+00:00)

## What it is
RARS is a RISC-V assembler and runtime simulator built as a successor to MARS, distributed as an executable Java jar. It provides a beginner-friendly development environment for writing, assembling, and debugging RISC-V assembly programs with breakpoint debugging and pseudo-instruction visualization.

## Use cases
- assemble and simulate RISC-V assembly programs
- learn RISC-V assembly in a computer architecture course
- debug RISC-V assembly with breakpoints
- see how pseudo-instructions map to machine code
- assemble multiple RISC-V files together
- teach assembly language with a MARS-like tool

## When to choose
- you are a student or educator learning/teaching RISC-V assembly
- you want a MARS-like environment but for RISC-V instead of MIPS
- you need a lightweight, cross-platform simulator that runs as a jar

## When to avoid
- you need a full production RISC-V toolchain or emulator for real hardware
- you require MIPS support (use original MARS)
- you need cycle-accurate simulation or OS-level RISC-V execution

## Facets
- artifact type: application
- maturity: active
- function: interpreter, developer-tools
- domain: education, developer-tools
- platform: cross-platform, jvm
- tags: risc-v, assembler, simulator, assembly-language, mars-fork, ide, education, computer-architecture, desktop

## Member repositories
- TheThirdOne/rars (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:12.081017+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:49:37.779705+00:00, confidence not recorded.
  - readme: https://github.com/TheThirdOne/rars (fetched 2026-08-28T04:05:12.081017+00:00, sha 8f33ed706a42)
- Data as of 2026-08-30T08:39:29.467469+00:00.