Juse

Juse is a virtual machine which executes bytecode.

It is inspired by projects like :

• Stack machines : cslarsen implementation
• Chip-8 : JamesGriffin implementation or cookerlyk implementation,
• Chip-16 : implementation listed on Github page.
• Other virtual chips : Khepra VM (implementation)

It could be compared to the JVM or the CLR machines.

The instruction space distribution is inspired by the RISC-V architecture.

© 2022 Sébastien GELDREICH

The goal

Juse is still in early development.
But you can play with it if you are curious.

• The goal : A multipurpose virtual machine written in modern C++
  • The machine has to be easy to understand (variable 8 bits aligned length opcodes with 16 bits opkey),
  • The project can be used as a framework to create a custom virtual machine with custom opcodes,
• There are a lot of features todo :
  • OpKeys specification is not fixed,
  • 2 assemblers languages are planned,
  • For now, I stay focused on the C++ code structure : one of the goals of this project is to create a virtual machine which is easy to understand and easy to extend,

This implementation : Uses only std::, uint128_t & SFML (future)

Key features

Implemented features :

• The machine is composed of Cpus (with Stack and Registers) and the Memory,
• Cpus can deal with 8, 16, 32 and 64 bits words,
• The Machine has threadable Cpus (each Cpu has a fixed frequency from 1 Hz to 1 GHz ; 4 KHz by default),
• 117 operations :
  • std : branching, moves, threads, allocations,
  • ext_u* : general registers manipulation (push/pop/read/write/unsigned arithmetic), integers and strings I/O

Dependencies

Environment

• Only tested on Windows 11
• Compiled with Visual C++ 2022

Documentation

Documentation

License

License : MIT
© 2022 Sébastien Geldreich