Console output. When you assemble something and stub your toe slightly, those errors will appear here.
RAWRS is a learning tool designed to help teach architecture concepts through the writing of assembly language. The language used is RISC-V, an up-and-coming open RISC architecture based on MIPS. RAWRS itself is loosely modeled after its own namesake, MARS, which is an equivalent learning solution for MIPS assembly.
The simulator (or emulator if you must) that runs the RISC-V application and kernel is TinyEmu by Fabrice Bellard, and is itself permissively licensed and open. Without this, the modifications required to make it work in an educational environment would not have been possible. And in the same spirit, RAWRS is offered, along with the educational RISC-V kernel written alongside it, completely openly and free.
This project is not to be confused with RARS by Benjamin Landers (another RISC-V project derived more directly by MARS) which can be found at https://github.com/TheThirdOne/rars. There is some effort to keep RAWRS in line with conventions found in this Java-based RARS.
You can find the source code for RAWRS on GitLab.
The main web application and program content is licensed under the terms of the GNU AGPLv3.0 license.
This program would not be possible if not for the existing and ongoing effort provided by the community at large within these independently developed and maintained projects.