emulsiV is a visual simulator for Virgule, a minimal CPU core implementation based on the RISC-V architecture. This simulator is intended to be used as a tool for teaching the basics of computer architecture.
The user interface shows the structure of the datapath and animates the data transfers between functional units. The execution of a single instruction is decomposed into several steps (fetch, decode, ALU, mem/reg, PC) for educational reasons, but the intent is not to reflect a specific sequencer or pipeline implementation. In fact, we don't plan to simulate a pipeline in more detail.
Due to the security policies in recent web browsers, some features will only work if the simulator is served by a web server. We provide facilities to automate the process.
Install npm and run the following command from the root of the source tree:
npm install
This command starts a local web server and opens the simulator in a web browser:
npm start
Check the JavaScript source code:
npm run lint
This command starts a local web server and runs the unit tests from the test folder:
npm test
In the rightmost column of the memory view, in ASCII mode, typing spaces can result in unexpected values.