VulpineSystem is a 64 bit fantasy computer based on the RISC-V architecture. It runs an extended/enhanced version of xv6, a Unix-like operating system, and is intended to be used for learning operating system development skills.
The RISC-V emulation core is based on semu.
Screenshot of xv6:
Simply run make. The resulting binary will be saved as vulpinesystem.
./vulpinesystem <raw kernel image> [<disk image>]
The most common use case is passing the xv6 kernel image as the first argument, and the filesystem image as the second argument: ./vulpinesystem ../xv6/kernel/xv6 ../xv6/fs.img
Note that the prebuilt RISC-V toolchains are compiled with the compressed instructions extension enabled. VulpineSystem does not support compressed instructions, so you will have to build a toolchain with that extension disabled. Follow the "Installation (Newlib)" instructions here, but when running the ./configure command, add --with-arch=rv64g. I also recommend running make with -j12 (replace 12 with how many threads your CPU has) in order to speed up the build process.
I often post news about what I'm working on with VulpineSystem and xv6 on Cohost! You can find my posts about this here.
This project is licensed under the MIT license.